The minimum speed the ball must be served so as to clear the net is 25.69 m / s
We know that,
Speed = Distance / Time
In order to calculate the time, we can use one of the equations of motion,
y = [tex]y_{0}[/tex] + [tex]v_{0}[/tex]t + 1/2 a[tex]t^{2}[/tex]
where,
y = Initial height
[tex]y_{0}[/tex] = Final height
[tex]v_{0}[/tex] = Initial velocity
a = Acceleration due to gravity
t = Time
Given that,
y = 2.7 m
[tex]y_{0}[/tex] = 1.08 m
[tex]v_{0}[/tex] = 0
a = -9.81 m / [tex]s^{2}[/tex] (Due to gravity)
Distance = 14.9 m
y = [tex]y_{0}[/tex] + [tex]v_{0}[/tex]t + 1/2 a[tex]t^{2}[/tex]
2.7 = 1.08 + 0 + 1/2 * ( -9.81 ) * [tex]t^{2}[/tex]
[tex]t^{2}[/tex] = 1.62 / ( - 4.9 ) = 0.33
t = 0.58 s
Speed = 14.9 / 0.58
Speed = 25.69 m / s
Velocity (speed) is the rate of change of distance with respect to time. It is denoted as V.
Therefore, the minimum speed the ball must be served so as to clear the net is 25.69 m / s
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The fact that the lunar phases repeat on the same solar dates about every 19 years (the metonic cycle) can be used to __
The Metonic cycle is a period of almost exactly 19 years after which the lunar phases recur at the same time of the year.
The Metonic cycle is defined as ,235 synodic months is just 2 hours, 4 minutes and 58 seconds longer than 19 tropical years.
In Athens, at 5th century BC, give the cycle to be a whole number of days, 6,940. Using these whole numbers facilitates the construction of a lunisolar calendar.
A tropical year is longer than 12 lunar months and shorter than 13 of them. The arithmetic representation of 12×12 + 7×13 = 235 allows it to be seen that a combination of 12 "short" years (12 months) and 7 "long" years (13 months) will be almost equal to 19 solar years.
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When you stand at rest on a pair of bathroom scales, the readings on the scales will always?
Weight is the the gravitational force of the total body mass in the gravitational field. We can feel our weight due to the earth's normal reaction to the weight.
Gravitational force is the kind of attractive force between any two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Therefore when we stand at rest on a pair of bathroom scales, the readings on the scales will always reads the same as the actual weight of our body.
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When a retailer offers t-shirts in small, medium, large, and x-large, and in 25 colors, the competitive strategy they are using is?
When a retailer offers t-shirts in small, medium, large, and x-large, and in 25 colors, the competitive strategy they are using is Variety
What is competitive strategy ?A business uses a set of rules and practises known as a competitive strategy to acquire a competitive edge in the market. It is the procedure for choosing and carrying out strategies that enable a company to strengthen its position in the market.
This plan was developed after evaluating the opportunities, threats, strengths, and weaknesses of the opposition and contrasting them with your own.Establishing a competitive advantage in the market is the goal of a competitive strategy. Porter's Five Forces Model is the main instrument for assessing an organization's competitive position in the market.Learn more about Competitive strategy here:
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8. Determine the density of a cube that has a mass of 40.5g and a volume of 9cm3 .
Answer:
d = 2.70 g/mL
Explanation:
search the next one up on go ogle it will give you an answer i promise
The body process in which an adequate supply of oxygen converts glucose into energy is called:________
Aerobic metabolism can occur both aerobically (using oxygen), or anaerobically (without oxygen). During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell.
What is Cellular respiration ?Through the process of cellular respiration, organisms mix oxygen with food molecules, directing the chemical energy contained in these substances toward life-sustaining processes while excreting carbon dioxide and water as waste.
Glycolysis, also known as the citric acid cycle, is the first stage of cellular respiration. The Krebs cycle, also known as the electron transport chain, is the second stage Anaerobic and aerobic respiration are the two basic forms of cellular respiration. It need oxygen (O2) to make ATP during an exclusive type of cellular respiration known as aerobic respiration.Learn more about Cellular respiration here:
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The full moon is opposite the sun in the sky, and rises as the sun sets. what is the approximate angular separation of the sun and the full moon?
The approximate angular separation of the sun and the full moon is 180°
The full moon is opposite the sun in the sky, and rises as the sun sets is may be understand as ,the Moon can be seen in the day light sky at any phase except for the new moon, when it's invisible to us, and full moon, when it's below the horizon during the day. The crescent through quarter phases are high in the sky during the day, but the daytime gibbous phases can be glimpsed only just before the Sun sets
In the crescent phase, the lit-up part of the Moon increases from 0.1% to 49.9%. is growing, while crescent refers to the curved sickle shape.
The gibbous moon is the phase of moon in that appears more than half lighted but less than full.
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Your weight is:__________
a. actually your mass.
b. the gravitational attraction between you and the earth.
c. a property of mechanical equilibrium.
d. the same in all locations.
Your body weight is the gravitational attraction between you and the Earth.
What is gravity?Gravity, which means "weight" in Latin, is a basic interaction in physics that causes all objects with mass or energy to attract one another. The electromagnetic force, the weak interaction, and the strong interaction are all significantly stronger than gravity, which is by far the weakest of the four fundamental interactions. As a result, it has no appreciable impact on subatomic particle level phenomena. On Earth, gravity imparts weight to tangible items, and the Moon's gravity creates tides in the oceans. However, gravity is the most important interaction between objects at the macroscopic scale, determining the motion of planets, stars, galaxies, and even light.
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A block has a mass of 4.726 g and a volume of 128.9 cm3. calculate the density in g/cm3
The density of the block is 0.036 g / [tex]cm^{3}[/tex]
We know that,
Density = Mass / Volume
Given that,
Mass = 4.726 g
Volume = 128.3 [tex]cm^{3}[/tex]
Density = 4.726 / 128.3 = 0.036 g / [tex]cm^{3}[/tex]
Density is defined as the unit mass per unit volume. It is represented using ρ.
Therefore, the density of the block is 0.036 g / [tex]cm^{3}[/tex]
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A car is traveling at a speed of 33 m/s . (a) what is its speed in kilometers per hour? (b) is it exceeding the 90 km/h speed limit?
According to the statement:
a) speed is equal to 118 km/h in kilometres per hour.
b) yes it is exceeding 90km/h.
What does speed mean?The pace at which an object's position changes in any direction is referred to as speed. Speed is defined as the ratio of something like the distance traversed to the time required to cover that distance. . . Speed is a scalar quantity since it just has a direction and no magnitude..
How are the speeds determined?Speed is determined by dividing the distance by the time. Calculating the units for speed requires knowledge of the units for both time and distance.. The units in this example will be meters per second (m/s), since the distance is measured in meters (m) and the time is measured in seconds (s).
(a)s₂= 118.km/h is its speed in kilometres per hour.
1h = 3600s
1km = 1000m
s₂= (33m/s) *[tex]\left(\frac{60 \times 60}{1000}\right)[/tex]
= 118.8km/h
s₂= 118.km/h
(b) yes it is exceeding 90km/h.
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Why is sugar solution classified the way it is?
Theorem: there is no smallest positive rational number.theorem: there is no smallest positive rational number. a proof by contradiction of the theorem starts by assuming which fact?
Assume there is a smallest rational integer that has the following form: a/b
Then observe that we can define a/(b+1), which is strictly less than a/b because its divisor is bigger and is rational because it is the product of two numbers. Due to the contradiction created by our original claims that a/b is the smallest rational number that is possible, we might conclude that there is no such thing as the smallest rational number.
There can therefore be no smallest rational number because we may always define a smaller rational number than the one we now possess.
What is Rational number ?Any number that can be expressed as a ratio is considered reasonable. It is therefore possible to represent it as a fraction when the numerator and denominator are both full numbers.
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Why would you have to know how to convert measurements when looking at a technical drawing?
1.) When examining technical drawings, conversion of dimensions is crucial knowledge to have. A person with measurement skills may use an object's shape to determine its sides, angles, area, and volume. If he is aware of these factors, he will be able to modify a sketch or design if the need arises.
If someone knows how to convert a measurement to a system that the other person is familiar with, they can do so when working with someone who is unfamiliar with the measuring system.
2.) Units have a crucial role. No meaning is given to numbers without units in scientific computations. For instance, if someone asks a shopkeeper for three rice, the shopkeeper may not grasp what he means, but if he is told that the customer wants three kilograms of rice, the shopkeeper will. Because the value of anything in one system of units may differ from that of the other, you need also be familiar with unit conversion into other systems (Metric, SI). Understanding units in this way can help with numerous issues.
An object or event's attributes are quantified through measurement so that they can be compared to those of other things or occurrences. Therefore, measurement is the process of determining the size or smallness of a physical quantity in relation to a primary reference quantity of a similar kind. The act or system of measuring is referred to as measurement. It can be viewed as a procedure for utilizing numbers to define physical objects. In this post, you can read more about measurement units and conversion.
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an asteroid is 180,000km away from the moon on a collision course. how much time will it take before the asteroid is 10km away if it is moving at a constant velocity of 36,000m/s?
Answer:
See below
Explanation:
(180 000 - 10) km / 36 km/s = 4999.7 =~ 5000 seconds = 83 .3 min
What is the magnitude and direction of the magnetic flux density b within the air?
Magnetic flux density - It is the force acting per unit current per unit length on a wire placed to magnetic field at right angle.
It is denoted by B
unit of B is tesla (T)
The total no. of magnetic field lines passing through a area is called magnetic flux.
Magnitude of the magnetic flux - It is equal to the area of the surface and having perpendicular direction to the plane of the surface.
Its unit is weber (Wb)
Direction to the magnetic flux density - The direction is north pole to the south pole.
The magnetic field lines are known as lines of magnetic flux.
flux lines are not in direction of force but perpendicular.
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About how many days must elapse between first-quarter moon and the next full moon in the same cycle?
About 29.5 days must elapse between first-quarter moon and the next full moon in the same cycle.
What do you mean by the phases of the Moon?The different ways the Moon appears to Earth over the course of about a month are known as its phases. The side of the Moon that faces the Sun will be illuminated as it revolves around the Earth. The various forms of the illuminated region of the Moon that can be observed from Earth are referred to as their phases. Every 29.5 days, a new phase begins. Due to tidal locking, the same half of the Moon always faces the Earth. The same half of the Moon's surface will therefore always be covered by the phases.
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How much would a 15.0kg object weigh on neptune if the acceleration due to gravity is 11.2?
On Neptune, the object weight is 168 newton.
We need to know about the weight to solve this problem. Weight can be measured by multiplying mass with gravitational acceleration. It can be written as
W = m . g
where W is weight, m is mass and g is the gravitational acceleration.
From the question above, we know that the parameter given is:
m = 15 kg
g = 11.2 m/s²
By substituting the parameters, we can calculate the weight.
W = m . g
W = 15 x 11.2
W = 168 N
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The energy driving the global water cycle is provided by:________
a. rotation of the earth on its axis.
b. solar energy.
c. wind.
d. tides.
The energy driving the global water cycle is provided by solar energy.
What is a solar energy?Solar energy is the term for solar radiation, which has the ability to ignite chemical reactions, produce heat, or create electricity. The total solar energy incident on Earth far exceeds both the present and future energy needs of the planet. This highly diffused source might potentially provide all of the energy required in the future if properly harnessed. Due to its limitless supply and lack of environmental impact compared to the finite fossil fuels coal, petroleum, and natural gas, solar energy is predicted to gain popularity as a renewable energy source in the twenty-first century. Although the Sun is a very potent energy source and sunlight is by far the most abundant energy that Earth receives, the intensity of sunlight at the planet's surface is actually rather low.
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If an electron is detached from an atom, the atom is converted to a positive ion called a(n):________
If an electron is detached from an atom, the atom is converted to a positive ion called a(n): Cation
Cations are positively charged ions formed when neutral atoms lose electrons. Chemical elements that are cations include:
Alkali metals that lose an electron and form a cation with 1+ charge.The alkali metals of the earth, which lose 2 electrons and form 2+ cation.Aluminum, which loses 3 electrons to form 3+ cation.What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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A solid block of metal is at its melting temperature. it takes 24j to melt 6kg of a metal. what is the latent heat of fusion of the metal?
The Latent heat of fusion is also known as the Enthalpy of Fusion. It is a kind pf change in enthalpy.
Brief explanation of Latent Heat of Fusion?The latent heat of fusion, is the change in enthalpy that takes place when energy, typically heat, is provided to a specific quantity of a substance to causes it to change from a solid state to a liquid state at a constant pressure.
For instance, 1 kilogram of ice melts at 0 °C at a variety of pressures, absorbing 333.55 kJ of energy without causing a change in temperature.
The heat of solidification, which occurs when a substance changes from a liquid to a solid, is equal and opposing.
This energy includes the contribution necessary to displace its surroundings against ambient pressure in order to accommodate any corresponding change in volume.
The melting point or the freezing point, depending on the situation, is the temperature at which the phase transition takes place. Conventionally, unless otherwise stated, the pressure is taken to be 1 atm (101.325 kPa).
CalculationThe formula of latent heat of fusion is L= q/m
Here q is the heat provided and m is the mass of the object.
So, L = 24j/6kg
L= 4j/kg
So, the latent heat of fusion is 4 j/kg
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The mass of the mars exploration rover is 1,063 kg. the gravity on mars is about 0.38 that of earth.1)where would the normal force exerted on the rover when it rests on the surface of the planet be greater?
The normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.
What is normal force?
A normal force is defined as the force that a surface exerts on an object.
N = W
N = mg
where;
m is mass of the objectg is acceleration due to gravityNormal force is proportional to the weight of an object be considered.
Normal force of the roverN = mg
N = 1,063 kg x 0.3(9.8 m/s²)
N = 3,125.22 N
Thus, the normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.
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What is the acceleration of a 10 kg mass pushed 5 n forceushed by a 5n(kg-m/s2) (use gresa method)
The final acceleration of the object is 2 m/[tex]s^{2}[/tex].
In this problem,
Applied force(F) = 10 N
The object’s mass (m) is 5 kg.
Having said that,
An object’s force is equal to the product of its mass and the acceleration it experiences as a result of the applied force.
i.e., Mass + Acceleration = Force (a)
F= m×a
Therefore,
A= F÷m
A= (10÷5) m/sec²
A= 2 m/sec²
Consequently, the object’s acceleration,
A=2 m/sec²
Concept of force and acceleration:
This states that the rate of velocity change of an object is directly proportional to the applied force and moves in the direction of the applied force.
It can be expressed mathematically as force (N) = mass (kg) x acceleration (m/s2). Therefore, an object with constant mass will accelerate in direct proportion to the applied force.
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Distance versus time is plotted and a best-fit line is found to be y = 0.098 x 0.01y=0.098x 0.01. what are the units of the slope 0.098?
The unit of the slope is m/s
Given that y = 0.098x + 0.01
According to slope formula, y = mx + c
Slope, m = 0.098
Slope of the line is equal to the velocity of the object in a distance-time graph. Unit of velocity is m/s.
Therefore, the unit of the slope is m/s
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How much did chevron pay in cash dividends to common shareholders during the first nine months of 2013? please provide your answer in millions without comma separator or decimal (ex: 343323456)
The correct answer for chevron pay in cash dividends to common shareholders during the first nine months of 2013 is 5572144100 dollors .
The dividend paid by Chevron foe 9 months of 2013 is $ 5572 millions.
Calculation:
No. Of outstanding shares = 1,921,429,000
Dividend per share = $2.9
Dividend paid = No. of outstanding shares * dividend per share
= 1,921,429,000 * 2.9
= $5,572,144,100
A dividend is a payment made to shareholders in exchange for their investment in a company's equity, and it is usually derived from the company's net profits. When a cash dividend is paid, the funds are transferred to a liability account known as dividends payable.
When the company makes the payment on the dividend payment date, which is usually a few weeks after the ex-dividend date, this liability is removed. Cash dividends and tick dividends have no effect on a company's net income or profit.
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who drink water with no mouth?
Answer: Tree
Explanation: Cause they don't have mouth to drink water they just have root
How many years would it take to reach the planet saturn travelling at 21 thousand miles per hour? enter your answer with 2 decimal places.
It would take about 4.8 years to travel from earth to Saturn.
How long would it take?We know that speed is expressed as the ratio of distance to time. In this case, we are trying to know ow many years would it take to reach the planet Saturn travelling at 21 thousand miles per hour.
Given that;
Speed = 21 thousand miles per hour
time taken = ???
Distance = 887 million miles
Speed = distance/time
speed * time = distance
time = distance/speed
time = 8.87 * 10^8 miles/2.1 * 10^4 miles per hour
time = 4.22 * 10^4 hours
If 8.766 * 10^3 hours make 1 year
4.22 * 10^4 hours make 4.22 * 10^4 hours * 1 year/8.766 * 10^3
= 4.8 years
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A resistor carries 0.40 a when connected to a 9.0-v battery. what is theresistance of the resistor?
The resistance of the resistor which carries 0.40 a when connected to a 9.0-v battery is 22.5 ohm
Given:
current of resistor = 0.40 A
voltage of resistor = 9.0 V
To Find:
the resistance of the resistor
Solution: Resistance of a resistor with current I and voltage V is defined as the ability of the element to resist the flow of current through it. It's SI unit is V/A or ohm. Ohms () are used to express resistance values. Electricity will flow from high to low when two terminals have an electron difference. That flow is countered by resistance. The current decreases as resistance increases. Conversely, the higher the current, the lower the resistance.
Voltage = Current x Resistance
Resistance = Voltage/Current
Resistance = 9 V/0.40 A = 22.5 ohm
Hence, the resistance of the resistor is 22.5 ohm
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The force that accelerates a rocket in outer space is exerted on the rocket by the?
Gases at pressure are released by rockets as they travel towards space. According to Newton's third law, the combustion chamber's exhaust gases push the rocket with an accelerating force known as the thrust.
Explain exactly Newton's Third Law:According to Newton's third law, if an object A pulls on an object B, then object B must exert an equal-sized and opposite-direction force on the first thing directed in the opposite direction. This law illustrates a symmetry in nature whereby forces always occur in pairs and whereby no body can exert a force without also being subjected to one.
What are Newton's 3rd law examples?Action and response are always equal but always move in the opposite direction, according to Newton's third law of motion. A human walking on the ground, a hammer driving a nail, a magnet attracting a paper clip, and a horse pulling a cart are all examples of Newton's third rule of motion.
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Can and object have a negative position and a positive velocity? Or vice versa, a positive position and a negative velocity? Explain your reasoning, do not just give a simple sentence answer.
Assuming that the relationship between spring compression and height is quadratic, how far will the ball go at the highest setting, which compresses the spring 3 cm ?
Assuming that the relationship between spring compression and height is quadratic, 2.25m far will the ball go at the highest setting, compresses the spring 3 cm
How do you calculate a compression spring's solid height?The solid height, h1, of an unground spring is (n+1)d, where n is the number of coils and d is the wire diameter (including platings and coating) in inches. The height, h2, of ground but not squared springs is (n-1)d. The solid height, h3, of ground and squared springs is (n-0.75)d
When a spring is compressed, the potential energy is stored in the mechanical bonds between atoms, which may be thought of as little springs. The spring as a whole cannot decompress until it breaks, but little portions may when they fall off. The majority of the stored energy is used to decompress each little component.
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A battery is discharging. electric current exits the battery through the ______ terminal, at a ______ potential than when it entered
When a battery discharges the current exits through the positive terminal at a higher potential than it entered.
When a battery discharges the current exits the battery through the positive terminal as a circuit connected to that should conduct current from positive to a negative potential.Accordingly, the current enters the battery at its negative terminal.In practicality, batteries contain some internal resistance that restricts the current flow during current flow.That is why there is a potential difference between the 2 terminals.To drive the current through the external circuit connected to the battery, it keeps a higher potential at its positive terminal while the negative terminal is kept at a lower potential in contrast.#SPJ4
