PHYSICS HIGH SCHOOL

Nuclear energy can be used to power _______.a. street lights
b. 4es
c. homes
d. all of the above

Answers

Answer 1
Answer: Nuclear power plants produce radioactivewaste that must be stored properly. It is very impossible for a nuclear power plantto have no waste at all since lots of chemicals are used to create the processas it gives energy to other machines. Nuclear energy can be used to power allof the above choices. Radioactive waste can not be released into local watersupplies since the wastes are very radioactive and may cause mutation to thefishes and bioaccumulation which will affect humans as well. It will also causeair pollution if the chemicals are not stored properly.

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A cart has a momentum of 42 kg m/s to the right. Its mass is 6 kg. → What is its velocity? show your work
A 15 kg box is sliding down an incline of 35 degrees. The incline has a coefficient of friction of 0.25. If the box starts at rest, how fast is it moving after it travels 3 meters?
What do we call the minimum energy that is required by an electron to leave the metal target in the photoelectric effect?Select one of the options below as your answer: A. energy function B. minimum function C. work function D. quanta E. electrical energy
An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine the power output and the rate of heat rejection
A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Three mountain climbers set out to climb a mountain from the same altitude and all arrive at the same location at the top. Mountain climber A took a long gradual slope to the top, B went a steeper but shorter path, and C tackled the sheer straight side to the top. Assume all three climbers weigh the same. Which did the most work? A
B
C
all did the same amount of work

Answers

Answer: all did the same amount of work

Explanation:

The work done by each mountain climber to climb the mountain is equal to how much gravitational potential energy they gained in the climb, and this is given by

W=\Delta U=mg\Delta h

where m is the mass of the climber, g is the gravitational acceleration, and \Delta h is the gap in altitude.

Since the three climbers have same weight, they also have same mass, so the term "m" in the formula is the same. Also, they started from the same altitude and arrive at the same altitude, so the gap \Delta h is the same for all of them. Therefore, they gain the same gravitational potential energy, and so they did the same amount of work. So, the work does not depend on the path taken.

A. B. C. D.
-___________

Answers

where is the data for this question? what is the purpose ?

What is the equation for calculating a machine's efficiency?I searched all over my textbook and couldn't find it, so I decided to post my question here.

Answers

Efficiency of a machine is defined as the ratio of work performed on it to work performed by it.

What is the fundamental meaning of efficiency?

  • Efficiency is the capacity to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively and efficiently.
  • Effectiveness and efficiency are frequently misunderstood. Efficiency is often a quantifiablenotion that is based on the ratio of total useful input to total useful output.
  • When a machine uses the majority of the power provided to it for its load and just a small portion for waste, it is said to be highly efficient.

Efficiency = Output energy/ Input energy

The percentage value of efficiency of a machine is calculated as:

Efficiency = (Output energy/ Input energy) X 100%

Learn more about the machine efficiency with the help of the given link:

brainly.com/question/11752408

#SPJ2
Efficiency is usually defined as how much useful work output do you get for each unit of work input. 

Efficiency = work output/work input 

Work input = effort force * effort distance 
Work output = load force * load distance 

The strength of the electric field 0.5 m from a 6 µC charge is N/C. (Use k = 8.99 × 109 N•

Answers

The formula for Electric Field Strength:

E = Q /(4πε₀r²)

Note:

1 /(4πε₀) = k = 8.99 * 10⁹ Nm²/C²

Q = 6 μC = 6 * 10⁻⁶ C.          r = 0.5m

E = kQ / r²

E = (8.99 * 10⁹ * 6 * 10⁻⁶) /(0.5²)       Use a calculator

E = 215.6 * 10³  N/C

Electric field strength = 215 600 N/C.

I hope this helps.

When two objects collide the momentum of the system of the system stays constant . This is a statement of ____?Impulse
A change in momentum
Newton's Third Law
The conservation of Momentum

Answers

This is a statement of "The conservation of Momentum" So, Answer would be Option D

Hope this helps!
When two objects collide the momentum of the system of the system stays constant . This is a statement of ____

The conservation of Momentum

When an object falls through air, there is a drag with dimensions ml/t2 that depends on the ________. 1) size of the object 2) mass of the object 3) velocity of the object 4) density of the air

Answers

When an object falls through air, the drag with dimensions \(mL/t^2\) depends on the 1) size of the object, 2) velocity of the object, and 4) density of the air.
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