The maximum length of foil will be 6732.84 cm or 67.3284 m
To find the maximum length of the foil, the given datas are:
Width of roll of foil = 304 mm
Height or thickness = 0.019 mm
Density of foil = 2.7 g/cm³
Mass of foil = 1.05 Kg
What is Density?Density is the substance's mass per unit volume. It can be also described by measuring how the particles in the substances tightly packed together.
d = m/ v
v = length (l) × width (w) × height (h)
First of we will convert the Kg into gram and mm into cm.
For 1 Kg = 1000 g
1.09 × 1000 = 1090 g
For 1 cm = 10 mm
304 / 10 = 30.4 cm
0.019 / 10 = 0.0019 cm
Now we will put the values in formula:
d = m/ l× h× w
l = m / d × h× w
l = 1050 g / 2.7 g/cm³× 30.4 cm × 0.0019 cm
l = 1050 g/ 0.155952 g/cm
l = 6732.84 cm or 67.3284 m
The maximum length of foil will be 6732.84 cm or 67.3284 m
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The density of silver is 10.5 g/cm3g/cm3. part a what is this value in kilograms per cubic meter?
The correct answer for the density of silver in kilograms per cubic meter is 10500 kg/m^3.
Silver has a density of 10.8103 kg/m3.Pure silver is nearly white, lustrous, soft, very ductile, and malleable, and it is an excellent heat and electricity conductor. Although it is not a chemically active metal, it is attacked by nitric acid (which forms nitrate) and hot concentrated sulfuric acid.
Atomic weight: 107.87 g.mol-1
At 20°C, the density is 10.5 g.cm-3.
962 °C melting point
2212 °C is the boiling point.
Silver has long been used in the manufacture of coins, ornaments, and jewelry due to its relative scarcity, brilliant white color, malleability, ductility, and resistance to atmospheric oxidation. Silver, along with gold and the platinum-group metals, is one of the so-called precious metals.
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A defibrillator connected to a patient passes 16.0 a of current through the torso for 0.0200 s. how much charge moves?
A defibrillator connected to a patient passes 16.0 a of current through the torso for 0.0200 s. A charge of 0.32C moves.
CalculationDefibrillator passes 16A through the torso of an individual
The time is 0.0200
The charge can be calculated as follows
= I × t
= 16 × 0.0200
= 0.32C
What is a defibrillator?Defibrillators can also restart an abruptly stopped heart. The sole therapy for someone in cardiac arrest is defibrillation. Rapid defibrillation is essential for survival and one of the most important measures in saving a life from Sudden Cardiac Arrest because a person’s chances of survival decrease by 7–10% for each minute that they do not receive it.
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If the mass of an object is 14 lbm, what is its weight, in lbf, at a location where g = 32.0 ft/s2?
The mass of the object is 13.924 lbf.
CalculationUsing the formula:
w = m x g ....... eq1
here w is weight of the object.
m is mass of the object, and
g is the acceleration of gravity.
mass, m = 14 lbm (given)
acceleration of gravity, g= 32.0 ft/[tex]s^{2}[/tex]
Now, substituting the values in equation (1):
w = 14lbm x 32.0 ft/[tex]s^{2}[/tex] = 448 lbm ft/[tex]s^{2}[/tex]
since, 1 lbf = 32.174 lbm ft/[tex]s^{2}[/tex]
so, w = 448 x [tex]\frac{1}{32.174}[/tex]
w = 13.924lbf
Hence, the mass of an object is 13.924 lbf.
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Which element, inductor or capacitor, releases its stored energy before it is removed from the circuit?
Inductor releases its stored energy before it is removed from the circuit.
What is an inductor?A passive two-terminal electrical device known as an inductor, also known as a coil, choke, or reactor, stores energy in a magnetic field as electric current passes through it. Typically, an inductor is made out of insulated wire twisted into a coil. According to Faraday's law of induction, the time-varying magnetic field generates an electromotive force (e.m.f.) (voltage) in the conductor as the current through the coil varies. Lenz's law states that the induced voltage has an opposing polarity (direction) to the change in current that caused it. Inductors so reject any changes in the current flowing through them.Inductance, which is the ratio of voltage to current change rate, is a property of inductors.To know more about inductors, refer:
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The radius of a vanadium atom is 130 pm. how many vanadium atoms would have to be laid side by side to span a distance of 2.54 mm?
The number of vanadium atoms are 9769230.
To find the number of vanadium atom, the given values are,
radius of vanadium atom = 130 pm
distance = 2.54 mm
What is Vanadium?Vanadium is a chemical element and the symbol of vanadium is V.The atomic number of vanadium is 23.The crystal structure of vanadium is Body centered cubic.Let us assume that a vanadium atom has a spherical shape.
diameter of a sphere = 2 x radius of the sphere
Thus,
Radius of a vanadium atom = 130 pm
= 130 x 10⁻¹² m
The diameter of a vanadium atom = 2 x radius
= 2 x 130 x 10⁻¹²
= 260 x 10⁻¹² m
Given a distance of 2.54 mm = 2.54 x 10⁻³ m,
The number of vanadium atoms required to span the distance,
= ( 2.54 x 10⁻³ m) / ( 260 x 10⁻¹² m)
= 9769230.
Therefore, the number of vanadium atom that would span a distance of 2.54 mm is 9769230.
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What simple way of interpretataing astronomical observations did copenicus advicate?
Nicolaus Copernicus advocated that the Earth and all other planets orbits around the sun in circular paths at uniform speeds.
Nicolaus Copernicus named this model as Copernicus's Heliocentric Model in 1543. Until his theory was published, it was believed that the Earth is the center of the solar system and the sun moves around it.
The mistake in his theory is that the orbits are circle in shape whereas the correct shape is elliptical which was later corrected by Kepler's model in 1609 which was later proved by Galileo Galilei with the help of telescope.
Therefore, Nicolaus Copernicus advocated that the Earth and all other planets orbits around the sun in circular paths at uniform speeds.
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During an adiabatic compression a volume of an air decrease to 1/4 th its original size calculate its final pressure if its original pressure was 1 atm
The final pressure is 6.96 atm.
We know that in an adiabatic process,
[tex]p_{1} V_{1} ^{gamma}[/tex] = [tex]p_{2} V_{2} ^{gamma}[/tex]
where,
p = Pressure
V = Volume
Gamma = Isentropic expansion factor
Given that,
[tex]p_{1}[/tex] = 1 atm
γ = 1.4 ( Assuming the air as an ideal gas )
[tex]V_{2}[/tex] = [tex]V_{1}[/tex] / 4
[tex]V_{1}[/tex] / [tex]V_{2}[/tex] = 4
[tex]p_{1} V_{1} ^{1.4}[/tex] = [tex]p_{2} V_{2} ^{1.4}[/tex]
[tex]p_{2}[/tex] = 1 * [tex]( 4 )^{1.4}[/tex] = 6.96 atm
An adiabatic process is a thermodynamic process without the involvement of heat. Usually it takes place in an insulated box.
Therefore, the final pressure is 6.96 atm
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A brick falls to the ground. if the time for the collision of the brick and the ground is increased by a factor of 4, the force of the collision with the ground will change by a factor of:_______.
The force of collision with the ground will change by a factor of 4
The formula for momentum shows an inverse relationship between force and time, in other words, force varies inversely as time. Hence, if the time of collision between the brick and the ground is increased by a factor of four, the force of collision is with the ground changes by a factor of four. In this case, the resulting force reduces by a factor of four. Momentum is defined as the product of the mass of an object with the changes in the velocity of the same object per time.
F=m(v-u)/t
Where F= momentum
v= final velocity
u= initial velocity
t = time taken
The earth diameter is about 3 and 2 thirds times the diameter of the moon. what is the angular diameter of the earth seen by an observer on the moon?
We calculate the angular diameter of the Earth using the equation:
a=arctanD/d
where a is the angular diameter, D is the physical diameter of the Earth, and d is the distance from the Moon to the Earth.
The equatorial radius of the Earth is rE=6378.1km, the diameter is therefore
D=2×rE=12756.2.
The mean distance to the Moon is d=384399km. This gives a (mean) angular diameter of a=1.90065°.
At Perigee the distance is d=362,600km. This gives an angular diameter of a=2.01482°
At Apogee the distance is d=405,400km. This gives an angular diameter of a=1.80226°
These Moon-Earth distances are as seen from the centre of the Moon. To calculate the diameter from the surface of the Moon, to subtract the position of the observer along the Moon-Earth axis.
If the observer is on the Moon's equator and the Earth is at zero-hour angle, the distance to the Earth needs to be subtracted by rM=1738.14km. Thus, we have;
The mean distance to the Moon is d=384399−1738=382661km, giving an angular diameter of a=1.90928°.
At Perigee the distance is d=362600−1738=360862km. We have an angular diameter of a=2.02452°
At Apogee the distance is d=405400−1738=403662km. We have an angular diameter of a=1.81001°
The angular diameter of the Earth from the surface of the Moon is, therefore, between a=1.80226° (at apogee and the Earth is near the horizon) and a=2.02452° (at perigee and for an observer at the equator and when the Earth is at maximum altitude on the meridian).
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With what speed (in feet/second) must a ball be thrown vertically upward in order to rise to a height of 18.1 ft, neglecting air resistance?
The maximum speed by which a ball is thrown vertically upward is 34.1255 ft/sec. as the height in the given data is 18.1 ft.
What is vertical launch upwards?In physics, vertical launch upward may be characterized as the motion that is illustrated by an object that has been set afloat vertically upwards in which the height and the consequences of the earth's gravitational force set in motion of an object are taken into consideration.
According to the question,
The formula for the vertical launch upward may be as follows:
y max = v₀²/(2*g).where v₀ = initial velocity
g = gravity max = maximum height.
We know that,
g = 32.17 ft/s²
On applying the formula of maximum speed and clearing the initial velocity we get:
y max = v₀²/(2*g)
v₀ = √(y max * (2*g)
v₀ = √( 18.1 ft * (2 * 32.17 ft/s²)
v₀ = √( 18.1 ft * 64.34 ft/s²)
v₀ = √1164.554 ft²/s²v₀ = 34.1255 ft/sec.
Therefore, the maximum speed by which a ball is thrown vertically upward is 34.1255 ft/sec. as the height in the given data is 18.1 ft.
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Consider heat transfer through a wall of a house (no window) on a winter day. what parameters affect the rate of heat conduction through the wall?
Heat conduction parameters affect the rate of heat conduction through the wall.
What is heat conduction parameters?The interaction by which intensity is moved from the more blazing finish to the colder finish of item is known as conduction. Heat precipitously moves from a sultrier body to a colder body. For instance, heat is directed from the hotplate of an electric oven to the lower part of a pan in touch with it. Without a contradicting outside driving energy source, inside a body or between bodies, temperature contrasts rot after some time, and warm balance is drawn nearer, temperature turning out to be more uniform. The course of intensity conduction relies upon four fundamental factors, the temperature angle, the cross segment of the materials in question, their way length, and the properties of those materials. A temperature slope is an actual amount that depicts in which heading and at what rate the temperature changes in a particular area.
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Express the integral as a limit of riemann sums using right endpoints. do not evaluate the limit. 3 6 x2 dx 1 find the width of each subinterval in terms of n.
The integral as a limit of Riemann sums using right endpoints is =lim (n→∞) n ∑i=1[(ln(1+(4+8i/n)2)−sin(4+8i/n))8/n].
Definite integralThe definite integral is defined here in terms of its limit.
So the definite integral goes as follows.
∫f(x)dx= lim(n→∞) n∑i=1 f(xi)Δx.
Where, for each positive integer n, we let Δx=(b−a) /n
And in case of i=1,2, 3..., n, we let xi=a+iΔx.
For Δx
For each n, we get
Δx=(b−a)/n= (12−4)/n=8/n
For xi
Xi = a+iΔx = 4+i8/n=4+8i/n
For f(xi)
∫124 [ln(1+x2) −sin x] dx
=lim (n→∞) n ∑i=1[(ln(1+(4+8i/n)2)−sin(4+8i/n))8/n]
What is integral?The Riemann integral, developed by Bernhard Riemann, was the first exact formulation of the integral of a function over an interval in the field of mathematics known as real analysis.
It was presented to the faculty at the University of Göttingen in 1854, but it wasn’t until 1868 that it was published in a journal.
The Riemann integral can be found using the calculus fundamental theorem for a variety of functions and real-world situations, or it can be roughly approximated using numerical integration.
The Riemann integralThe Riemann integral can be thought of as the limit of a function’s Riemann sums as the finer the partitions are.
The function is referred to as being integrable if the limit exists (or more specifically Riemann-integrable). By making the partition fine enough, the Riemann sum can be brought as close as desired to the Riemann integral.
The mesh of the partitions must, among other things, get smaller and smaller until, at the limit, it is zero.
If this were not the case, then on specific subintervals, we would not be receiving a fair approximation to the function. Actually, this is sufficient to define an integral.
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____ voltage controls are simply controls that do not employ the use of a control transformer to change the voltage to a lower value.
The appropriate word in the blank is → Line.
We have a statement regarding Voltage controls.
We have to fill in the blank with appropriate word.
Why is Voltage control needed ?Voltage control is necessary to prevent damage such as overheating of generators and motors, to reduce transmission losses.
According to the question, we have -
____ voltage controls are simply controls that do not employ the use of a control transformer to change the voltage to a lower value.
The appropriate word for the blank is → Line. Line voltage controls do not employ control transformer to decrease voltage. Line voltage controllers are designed to regulate the voltage of HVAC systems which require direct electrical power. These controllers are also known as inline thermostats and are typically connected to wires supplying 120 to 240 volts of power to heating or cooling device.
Hence, the appropriate word for the blank is → Line
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You are given the equation(s) used to solve a problem. write a realistic problem for which this is the correct equation(s) number 72
Complete Question
In Problems 69 through 72 you are given the equation(s) used to solve a problem. For each of these,
(a) Write a realistic problem for which this is the correct equation(s).
The electric field due to a point charge at distance of 1 um is given as 1.5x10^6 N/C
E = (9*10^9 Nm^2/C^2*N*1.6*10^-19 C)/(1*10^-6)^2
E = 1.5x10^6 N/C
Hence, Electric field is 1.5x10^6 N/C
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How lrge a force is necessary to stretch a 1.1 m diamter steel wire (y = 2.0 * 10^11 ) by 2.0 percent
The amount of force necessary to stretch a 1.1 m diameter steel wire is 13.82 * [tex]10^{9}[/tex] h N
Young's modulus Y = ( F /A ) / ε
where,
F = Force
A = Area
ε = Strain
Given that,
d = 1.1 m
Y = 2 * [tex]10^{11}[/tex] N [tex]m^{-2}[/tex]
A = 2 π r h = 2 * 3.14 * 0.55 * h
A = 3.454h [tex]m^{2}[/tex]
[tex]l_{2}[/tex] = 1.02 [tex]l_{1}[/tex]
Strain ε = ΔL / L = ( [tex]l_{2}[/tex] - [tex]l_{1}[/tex] ) / [tex]l_{1}[/tex] = ( 1.02 [tex]l_{1}[/tex] - [tex]l_{1}[/tex] ) / [tex]l_{1}[/tex]
ε = 0.02
Y = ( F /A ) / ε
F = 2 * [tex]10^{11}[/tex] * 0.02 * 3.454h
F = 13.82 * [tex]10^{9}[/tex] h N
Young's modulus is a property of material which is used to figure out how easily can a material can be stretched or deformed.
Therefore, the amount of force necessary to stretch a 1.1 m diameter steel wire is 13.82 * [tex]10^{9}[/tex] h N
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Find the mass of body which is accelerated by applying a force of 200n,that speed up it to 36 ms^-2
The mass of body which is accelerated by applying a force of 200n,that speed up it to 36 m/s^2 is 5.5 grams.
Given that,
Applied Force = 200n
Acceleration = 36m/s^2
Let,
consider a mass of the object = m
Now,
Formula used:
Force = mass / acceleration
F = m / a
m = f / a
m = 200/ 36
m = 5.5 gm
Therefore,
Mass of the body will be 5.5 grams.
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If your engine is flooded with gasoline, you should push the ____ to the floor and hold for _____.
a. accelerator, 5 seconds
b. accelerator, 1 minute
c. brake, 1 minute
d. brake, 5 seconds
If your engine is flooded with gasoline, you should push the brake, to the floor and hold for 5 seconds.
What is gasoline?Gasoline or petrol is a transparent, petroleum-derived flammable liquid that is used primarily as a fuel in most spark-ignited internal combustion engines. Gasoline is already considered frozen if it turns into a thick sludge or wax. To totally avoid frozen gasoline inside the car, focus on preventing the fuel line from freezing during winter. Stale gasoline can be dangerous as it contains a combination of over 150 chemicals that can destroy both animal and human lives. Gasoline vapors are heavier than air, so they settle on the ground and travel like a liquid. Because of this, they often find their way into drains, basements, and sewer lines.
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Describe a situation in which you can accelerate even though your speed doesn’t change.
Acceleration is not the same as speeding up. It refers to any modification of motion's direction or speed. Accelerated motion is any movement that is not constant speed in a straight line.
What is meant by acceleration?In physics, acceleration refers to the rate at which an object's velocity over time changes. They are accelerations and vector quantities. The direction of an object's acceleration is determined by the direction of the net force acting on it.
Depending on whether an object is moving faster, slower, or in a different direction, its velocity may change. Examples of acceleration include a falling apple, the moon orbiting the earth, and a car that has stopped at a stop sign.
Acceleration is the measure of a change in velocity. Acceleration frequently, though not always, denotes a shift in speed. The direction of motion is changing, therefore an object moving at a constant speed in a circular path is still moving ahead.
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If the reaction is second order in a and first order in b, what is the rate when the initial concentration of [a] = 4.11 mol/l and that of [b] = 3.71 mol/l?
Answer:
New concentration of A =3 [A] Put the values we get new rate of reaction. − dtd[R]=k[3A] 2[B] Hence, the rate of reaction will increase by 9 times. (iii) Given that. New concentrations of A=2[A] New concentration of B=2[B] Plug the values we get.
Explanation:
The rate using the rate constant and the given concentrations [tex]\( \text{rate} = 2.1897 \text{ mol/L.s} \)[/tex].
The rate law for the reaction is given as: [tex]\rm \[ \text{rate} = k \times [a]^2 \times [b] \][/tex]
where:
[tex]\[ [a] = 4.11 \text{ mol/L} \]\\\ [b] = 3.71 \text{ mol/L} \][/tex]
[tex]\rm \[ k \][/tex] is the rate constant (to be determined)
To find the rate, we need to calculate the rate constant [tex](\( k \))[/tex] and then substitute the given concentrations of [tex]\( [a] \)[/tex] and [tex]\( [b] \)[/tex] into the rate law.
Step 1: Calculate the rate constant [tex](\( k \))[/tex] using the provided rate value and concentrations.
[tex]\[ \text{rate} = 2.1897 \text{ mol/L.s} \]\\\[k = \frac{\text{rate}}{[a]^2 \times [b]} \]\[k = \frac{2.1897 \text{ mol/L.s}}{(4.11 \text{ mol/L})^2 \times 3.71 \text{ mol/L}} \][/tex]
Step 2: Calculate the rate using the rate constant and the given concentrations.
[tex]\[ \text{rate} = k \times [a]^2 \times [b] \]\[ \text{rate} = \left(\frac{2.1897 \text{ mol/L.s}}{(4.11 \text{ mol/L})^2 \times 3.71 \text{ mol/L}}\right) \times (4.11 \text{ mol/L})^2 \times 3.71 \text{ mol/L} \]\[ \text{rate} = 2.1897 \text{ mol/L.s} \][/tex]
The correct result is [tex]\( \text{rate} = 2.1897 \text{ mol/L.s} \)[/tex].
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A vertical spring stretches 3.9 cm when a 10.-g object is hung from it. The object is replaced with a block of mass 25 g that oscillates up and down in simple harmonic motion. Calculate the period of motion.
The platofm on the school stage is 8 3/4 feet wide. each chair is 1 5/12 feet wide. how many chairs will fit acroos the platform?
6 chairs will fit across the platform.
CalculationWe have a school stage of 8 3/4 feet wide.
It's also given that each chair is 1 5/12 feet wide.
To find out the number of chairs possible we can simply divide the total length available by width of the chair.
8 3/4 = 35/4
1 5/12 =17/12
So, 35/4 / 17/12
So, the final answer comes up to 6.
so, the total number of chairs that would fit in are 6.
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a stick is dropped off a cliff what is the sticks intial velocity? Show work
A bullet brand unknown is fired from the feg p9r pistol. suppose the velocity (at 15 feet) of the bullet us 1,000 feet per second. is the bullet likely to be manufactured by winchester?
No, the bullet is not likely to be manufactured by Winchester.
Given:
X = 936
S=10\ss=10
We are unable to use the empirical rule since we do not know if the distribution is symmetric or skewed.
According to Chebyshev’s rule, which states that at least 89% of the data values are contained within 3 standard deviations of the mean, can be used to help us.
Overline x 3s=936 3(10) = 906 x 3s = 936 3(10) = 906
Overline x +2x = 936 + 3 (10), which becomes x +2x = 936
Thus, between 906 and 966 is the range for at least 89% of the velocities.
Empirical principle approximately 68.3 percent of the values in a data set with a symmetric distribution will be within one standard deviation of the mean, approximately 95.4 percent will be within two standard deviations of the mean, and approximately 99.7 percent will be within three standard deviations of the mean.
Usual values fall within 3 standard deviations of any mean and 1000 does not come within 3 standard deviations of the mean, thus it is unlikely that the bullet with velocity 1000 feet per second was manufactured by Winchester.
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The _____ experiences a temperature _____ primarily due to the absorption of _____.
The thermosphere experiences a temperature increase primarily due to the absorption of gamma rays.
What is thermosphere?
The thermosphere is a layer of Earth's atmosphere that is directly above the mesosphere and below the exosphere.
Characteristics of thermosphereThe thermosphere is characterized by high temperature and large variability, in response to changes in solar ultraviolet radiation and solar activity.
Thus, the thermosphere experiences a temperature increase primarily due to the absorption of gamma rays.
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Use the concept of inertia to explain why Newton’s first law of motion is accepted as true
Choose the correct wavelength (405 or 500 nm) based on your evaluation of the absorption spectrum just taken. explain the correct choice of wavelength.
The correct answer for the wavelength (405 or 500 nm) based on our evaluation of the absorption spectrum just taken is 405 nm which is Fluorescence .
Fluorescence diagnosis could improve the safety and reliability of stereotactic brain tumor biopsies performed with biopsy needles equipped with integrated fiber optics. Vital tumor tissue can be localized in vivo during the excision procedure using 5-aminolevulinic-acid-induced protoporphyrin IX (PpIX) fluorescence, reducing the number of samples required for a reliable diagnosis. On optical phantoms, the practical suitability of two different PpIX excitation wavelengths (405 nm, 633 nm) was investigated. Violet excitation at 405 nm provides a 50-fold increase in sensitivity for the bulk tumor; ray tracing simulations show that this factor increases up to 100 with decreasing fluorescent volume.
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The potential at points a and b are: va = -2 v and vb = 6 v. when a 5 c charge is moved from a to b, the change in potential energy of this system is answer j.
The change in potential energy of this system is = 40 J.
What is the potential difference?The potential difference, often known as voltage, is equal to the amount of current times the resistance. One Joule, or one Volt, of energy is required for one Coulomb of charge to flow from one place in a circuit to another.
What is the formula for potential difference?V=Uq The change in potential energy of a charge q transported from point A to point B, divided by the charge, is what is used to determine the electric potential difference between points A and B, or VBVA. The joules per coulomb unit of potential difference is called the volt (V).
This system's potential energy changed by 40 J.
Energy = charge * potential difference
=> Energy = (8v)*5
=> Energy = 40 J
The change in potential energy of this system is = 40 J.
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Solve the following problems using the correct number of significant figures each time.
8. Significant Figures Solve the following
problems, using the correct number of signifi-
cant figures each time.
a. 10.8 g - 8.264 g
b. 4.75 m - 0.4168 m
c. 139 cm x 2.3 cm
d. 13.78 g/11.3 mL
e. 1.6 km + 1.62 m + 1200 cm
The solution to the problems in correct significant figures are;
a. 10.8 g - 8.264 g = 2.536 g
b. 4.75 m - 0.4168 m = 4.3332 g
c. 139 cm x 2.3 cm = 319.7 cm²
d. 13.78 g/11.3 mL = 1.22 g/ml
e. 1.6 km + 1.62 m + 1200 cm = 1,613.62 m
What is significant figures?Significant figures are used to establish the number which is presented in the form of digits.
Solution of the given expressionsa. 10.8 g - 8.264 g = 2.536 g
b. 4.75 m - 0.4168 m = 4.3332 g
c. 139 cm x 2.3 cm = 319.7 cm²
d. 13.78 g/11.3 mL = 1.22 g/ml
e. 1.6 km + 1.62 m + 1200 cm = 1,600 m + 1.62 m + 12 m = 1,613.62 m
Thus, the solution to the problems in correct significant figures are;
a. 10.8 g - 8.264 g = 2.536 g
b. 4.75 m - 0.4168 m = 4.3332 g
c. 139 cm x 2.3 cm = 319.7 cm²
d. 13.78 g/11.3 mL = 1.22 g/ml
e. 1.6 km + 1.62 m + 1200 cm = 1,613.62 m
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Gold has a density of 0.01932 kg/cm3. what is the mass (in kg) of a 132.5 cm3 sample of gold?
Answer:
ρ = M / V ρ = density
M = ρ * V = 132.5 cm^3 * .01932 kg / cm^3 = 2.561 kg
Note: Water has a density of 1000 kg / m^3 = 1E-3 kg / cm^3
So the equivalent weight of water would be
1.0E-3 kg/cm^3 * 132.5 cm^3 = .132 kg for the water
The specific gravity of the Au is 2.561 / .132 = 19.4 (correct)
An object is pulled northward with a force of 10 n and southward with a force of 15 n. the magnitude of the net force on the object is:________
a. 0 n.
b. 5 n.
c. 10 n.
d. 15 n.
The correct option is (b) 5n
As a result, there is a net downward force of 5N operating on the object.
The resultant force is the force that results from adding the vector sums of all the forces operating on an item. The combined action of all the acting forces on the object produces the same effect as the resulting force. When determining the resulting force, the direction of the forces must be taken into account.
Given;
The northward force is Fn = 10N
The southward force is Fs = 15N
Required;
The net force on the mobile phone is Fnet = ?N
The object's weight exerts downward pressure, and upward resistance exerts upward pressure. The vector sum of these two forces will be the net force.
Fnet = Fs - Fn (Considering the direction downward as positive)
Fnet= 15N - 10N
Fnet = 5N
As a result, there is a net downward force of 5 N operating on the object.
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Any substance or mixture of substances intended for the cure, mitigation, diagnosis, or prevention of disease is a(n) ____
Any substance or mixture of substances intended for the cure, mitigation, diagnosis, or prevention of disease is a drug.
What is diagnosis?The process of determining which disease or condition is to blame for a person's symptoms and signs is known as medical diagnosis. The term "diagnostic" is most frequently used, with the implied reference to medicine. The history and physical examination of the patient who is seeking medical attention often yield the data needed for diagnosis. The process frequently includes one or more diagnostic procedures as well, such doing medical testing. Posthumous diagnosis is occasionally seen as a type of medical diagnosis.
Due to the vague nature of many symptoms and indicators, diagnosis is frequently difficult. For instance, skin redness (erythema), when present alone, is a symptom of numerous illnesses and cannot be used to diagnose a patient's condition.
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