The work needed to stop the bus is 500000 J. The work done by the brakes to stop the bus is equal to the change in kinetic energy of the bus.
The initial kinetic energy of the bus is 500000 J. When the bus stops, its kinetic energy is zero.
Therefore, the work done by the brakes is:
W = ΔKE = KE_final - KE_initial = 0 - 500000 J = -500000 J
The negative sign indicates that the work is done by the brakes on the bus.
Therefore, the work needed to stop the bus is 500000 J.
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The amount of work that is needed to stop the bus is the same energy it has so 500000 joules
How to find the work needed ?The work needed to stop the bus is equal to the bus's kinetic energy.
Work is the transfer of energy from one object to another.Kinetic energy is the energy of an object due to its motion.In this case, the work done by the brakes is used to convert the bus's kinetic energy into heat energy. The heat energy is dissipated into the environment.
Therefore, the work needed to stop the bus is 500000 joules.
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1.) The radio wave from a station broadcasting at 1.3×10^6 Hz has a wavelength of 230 m. What is the wave's speed?
2.) A wave has a frequency of 575 Hz. What is its period?
3.) A humming bird feeder is tied by a rope to a tree branch. You notice that in a gentle breeze, the feeder moves back and forth 15 times in 1 minute. How long is the rope?
a cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's acceleration in m/s?
The acceleration of a cheetah that can increase its speed from 0 to 70 mph in 2.2 seconds is 14.224 m/s² after converting the velocity into meters per second.
Explanation:To calculate the acceleration of a cheetah that can go from 0 to 70 mph in 2.2 seconds, we first need to convert the speed from miles per hour (mph) to meters per second (m/s). The conversion factor is 1 mph = 0.44704 m/s. So, 70 mph is equivalent to 70 × 0.44704 m/s, which equals 31.2928 m/s. According to the formula for acceleration (a), which is the change in velocity (Δv) divided by the time (Δt), the cheetah's acceleration would be:
a = Δv / Δt = (31.2928 m/s - 0 m/s) / 2.2 s = 14.224 m/s²
Therefore, the cheetah's acceleration is 14.224 m/s².
What is voltage actually? Need an informal and non academic term explanation........TIA
How would your kidneys likely respond to the ingestion of too much soda (such as Pepsi)?
Answer:
This would increase the formation of the NH3 buffer.
Explanation:
This would increase the formation of the NH3 buffer. Since Pepsi has acid in it, it would cause the kidneys to reabsorb bicarbonate from the urine leading to an increase in the formation of the NH3 buffer.
Strictly speaking, will a penny be slightly more massive if it has a negative charge or a positive charge? discuss.
A beaker containing mercury is placed inside a vacuum chamber in a laboratory. the pressure at the bottom of the beaker is 26000 pa. what is the height of the mercury in the beaker? the acceleration of gravity is 9.81 m/s 2 .
The diagram shows the layers of the Sun. Which labels correctly identify the layers most closely associated with gamma rays and visible light?
Z: Gamma rays
X: Visible light
X: Gamma rays
Z: Visible light
Z: Gamma rays
Y: Visible light
Y: Gamma rays
Z: Visible light
Answer:
Z: Gamma rays
X: Visible light
Explanation:
A close look at the diagram attach shows the core of the sun and then the external surface.
Gamma rays are intricately associated with the nuclear reactions that go on in the core of the sun that makes it to produce light. Hence Z must refer to gamma rays emitted in these nuclear processes at the core of the sun.
Visible light is given out by the sun and seen externally. Hence X is visible light.
The velocity of sound in sea water is 1533 m/s. find the bulk modulus (in n/m2) of sea water if its density is 1.025 ´ 103 kg/m3.
Answer:
Bulk modulus, [tex]B=2.40\times 10^9\ N/m^2[/tex]
Explanation:
Given that,
The velocity of sound in sea water, v = 1533 m/s
Density of water, [tex]\rho=1.025\times 10^3\ kg/m^3[/tex]
We need to find the bulk modulus. The speed of sound also depends on the bulk modulus of the material. The relationship is given by :
[tex]v=\sqrt{\dfrac{B}{\rho}}[/tex]
[tex]B=v^2\times \rho[/tex]
[tex]B=(1533\ m/s)^2\times 1.025\times 10^3\ kg/m^3[/tex]
[tex]B=2.40\times 10^9\ N/m^2[/tex]
So, the bulk modulus of the sea water is [tex]2.40\times 10^9\ N/m^2[/tex]. Hence, this is the required solution.
In object moving at 30 M/S takes five seconds to come to a stop what is the objects acceleration
In the formulas for latent heat of fusion and latent heat of vaporization, what does Q represent?
Final answer:
Q represents the amount of heat energy required for phase change in the context of latent heat equations. It is calculated using mass and the substance-specific latent heat constants for fusion and vaporization.
Explanation:
In the context of the latent heat formulas, Q represents the heat required to change the phase of a substance. Specifically, for the latent heat of fusion, Q = mLf where Lf is the latent heat of fusion, the constant that denotes the amount of heat energy required to change 1 kilogram of the substance from a solid to a liquid without changing its temperature. For the latent heat of vaporization, Q = mLv where Lv is the latent heat of vaporization, indicating the amount of heat energy needed to change 1 kilogram of the substance from a liquid to a gas. The values of Lf and Lv are determined experimentally for different materials. For instance, for water, Lf is 334 kJ/kg, thus Q for turning 1 kilogram of ice at 0°C into water is Q = 3.34 × 105 J. The latent heat of vaporization for water is Lv = 2256 kJ/kg, meaning the energy required to vaporize mass m of water is Qv = mLv.
If the resistance of an electric circuit is 12 ohms and the voltage in the circuit is 60 V, the current flowing through the circuit is...
A. 60 A.
B. 5 A.
C. 0.2 A.
D. 720 A.
When you drive along the right-rear side of another vehicle, you are ______________?
When you drive along the right-rear side of another vehicle, you are in one of the driver's blind spots and in danger of a collision.
what is driving?Driving is the controlled operation and movement of a vehicle, including cars, motorcycles, trucks, buses, and bicycles.
The most critical thing to do before you pass another vehicle is check to the right side. It is also very important never to drive faster than the the speed limit, or at a speed that is unsafe for the current traffic,
weather or road condition in order to pass other vehicles. The law requires you to only pass other vehicles on the left (using the left lane). This is why you should check the right side.
Hence when you drive along the right-rear side of another vehicle, you are in one of the driver's blind spots and in danger of a collision.
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A baseball has a mass of 145 g A bat exerts a force of 18400 N on the ball what is the acceleration of the ball
The sound emitted by bats has a wavelength of 3.7 mm. what is the sound's frequency in air?
A 30w light bulb uses 600J of electrical energy in a certain period of time. In that time , it produces 450 J of light energy. The rest of the energy is wasted calculate the efficiency of the light bulb
The efficiency of the light bulb is 75%.
Calculating The Efficiency Of A Light Bulb.
To calculate the efficiency of the light bulb, you can use the following formula:
Efficiency (%) = (Useful Energy Output / Total Energy Input) * 100
In this case:
- Useful Energy Output is the light energy produced, which is 450 J.
- Total Energy Input is the electrical energy used, which is 600 J.
Efficiency (%) = (450 J / 600 J) * 100 = (3/4) * 100 = 75%
So the efficiency of the light bulb is 75%. This means that 75% of the electrical energy input is converted into useful light energy, while 25% is wasted as other forms of energy, such as heat.
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What is the speed of a wave with a frequency of 0.2 Hz and a wavelength of 100 meters?
Answer: The velocity of the wave is 20m/s
Explanation: The velocity of a wave can be obtained by the equation:
Velocity = wavelenght*frequency.
or v = λ*f
In this case, we know that: λ = 100 meters, f = 0.2Hz (where Hz means 1/s)
then, we have that the velocity of the wave is:
v = 100m*(0.2*1/s) = (100*0.2)m/s = 20m/s
The speed of a wave is mathematically given as
[tex]\lambda= 20m/s[/tex]
What is the speed of a wave with a frequency of 0.2 Hz and a wavelength of 100 meters?Question Parameters:
the speed of a wave with a frequency of 0.2 Hz
and a wavelength of 100 meters
Generally, the equation for the Wave speed (m/s) is mathematically given as
[tex]\lambda= frequency (Hz) x wave length (m) \\\\\lambda=0.2 x 100[/tex]
\lambda= 20m/s
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An opera singer sings a note that breaks a glass. This is an example of _____. consonance dissonance resonance reflection
The Answer is
C. Resonance
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The speed of light in a vacuum is 2.99x10^8 m/s. calculate its speed in miles per hour.
When the surface of an object is ____ the plane of projection, the surface appears in its true size and shape on the plane of projection?
A crane lifts a 6.500 N weight 10 m in 180 seconds. What power is used?
1. A U.S. manufacturer wants to sell computer equipment to companies in Honduras. Because the U.S. government limits trade with Honduras, the manufacturer is required to obtain an export license from the Department of Commerce before selling and shipping the equipment to the purchasers. The export license fee is $8,100, not including a nonrefundable application fee of $2,700. What are the possible effects of these fees?
If the US government does not allow the manufacturer to export their products to Honduras, the manufacturer will lose the non-refundable application fee of $2,700 and because the U.S. government limits trade with Honduras, the manufacturer is required to obtain an export license from the Department of Commerce, which can result to a shortage of demand for US products.
In addition, the total value of product exports must not less than $10800 for the duration of the license so that the application and license fee will be worthwhile.
The imposition of an export license fee and a nonrefundable application fee can increase costs, reduce profit margins, and impact demand for U.S. manufacturers selling to Honduras.
Obtaining an export license for selling computer equipment to Honduras involves a fee of $8,100, plus a nonrefundable application fee of $2,700. These fees could have several potential effects on the U.S. manufacturer:
Increased Costs: The total cost of $10,800 ($8,100 + $2,700) may increase the final price of the equipment, making it less competitive in the Honduran market.Reduced Profit Margins: Unless the manufacturer can pass these costs onto the buyers, the profit margins will be reduced.Impact on Demand: Higher prices due to increased costs can result in lower demand, as buyers may seek more affordable alternatives.For example, if the equipment normally sells for $100,000, adding $10,800 in fees could push the price to $110,800, potentially reducing its attractiveness compared to local or other international sellers.
Using what you know about newton's second law explain why a car with a lager mass use more fuel than a car with a smalle mass. assume both car dreive the same distance
An experiment yielded the above temperature and time information. what is the freezing point of the material in this experiment if the material is a solid at time zero?
If a cell phone is dropped from a very tall building, how far has the phone fallen after 2.7 seconds, neglecting air resistance?
The phone has fallen approximately 36.621 meters after 2.7 seconds.
Explanation:In order to determine how far the phone has fallen after 2.7 seconds, we can use the equation of motion: s = ut + (1/2)at², where s is the distance, u is the initial velocity, t is the time, and a is the acceleration. Since the phone is dropped from rest, its initial velocity is 0 m/s. Neglecting air resistance, the only force acting on the phone is gravity, which accelerates it at a rate of 9.8 m/s². Plugging in the values, we get:
s = (0)(2.7) + (1/2)(9.8)(2.7)²
s = 36.621 m
Therefore, the phone has fallen approximately 36.621 meters after 2.7 seconds.
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What is the difference between AM radio waves and FM radio waves?
A-AM waves travel short distances along the Earth’s surface; FM waves travel farther.
B-An AM wave varies in amplitude; an FM wave varies in frequency.
C-FM waves are better reflected by particles in the Earth’s atmosphere.
D-An FM wave varies in amplitude; an AM wave varies in frequency.
If environmental triggers cannot be avoided or modified, they may make it difficult to extinguish a behavior.
Answer:
true
Explanation:
How do cranial nerves transmit information to the senses?
Answer:
They transmit directly between the brain and the sense organs.
Explanation:
Cranial nerves – Nerves that emerge directly from the brain and transmit information directly between the brain and various organs and muscles
99 POINTS!!!
Why do people on Earth see only one side of the Moon when the Moon is visible in the sky?
A. The Moon does not rotate.
B. The Moon does not revolve.
C. The Moon and Earth rotate at the same rate.
D. The Moon rotates and revolves at the same rate.
Hello!
I believe the answer is C) The Moon and Earth rotate at the same rate. The moon and the earth rotate at the same rate. Meaning that the moon orbits the earth in 27.322 days. It also takes approximately 27 days for the moon to rotate once on its axis. So as a result, the moon does not seem to be spinning, but appears to observers from Earth to be keeping almost perfectly still.
I hope it helps!
which reaction is a single replacement reaction??
A. 2H2+O2-2H20
B. 2H202-2H20+O2
C. KOH+HCI+H2O
D. Cu+ 2AgNO3- 2Ag +Cu(NO3)2
What is the approximate range of wavelengths for visible light?