Recent questions in Physics

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Which of the following statements best summarizes the law of conservation of energy before and after a change in a system? A. PE (initial) + KE (initial) = PE (final) + KE (final) = B. PE (initial) = KE

Gst asked Dec 23, 2023

by Gst

5.5k points

2 answers

18 votes

71.2k views

Every second, the Sun converts 4 million tons of matter to energy. How long will it take the Sun to reduce its mass by 1% (the mass of the Sun is 2×10^30kg)? Compare your answer with the lifetime of the

Steffan Perry asked Dec 23, 2023

by Steffan Perry

5.7k points

1 answer

0 votes

53.9k views

Explain how nuclear energy is generated

Burger King asked Dec 23, 2023

by Burger King

5.6k points

1 answer

1 vote

35.6k views

A stone is dropped from the top of a tower which touches the ground after 2 seconds. Calculate the speed of the stone hitting the ground surface. (g = 9.8 m/s²)

MJehanno asked Dec 23, 2023

by MJehanno

5.7k points

2 answers

18 votes

56.2k views

2 Name the device in a car that we use to change the speed of the car

Akmozo asked Dec 23, 2023

by Akmozo

6.0k points

1 answer

6 votes

150k views

A parallel plate capacitor is charged by connecting it to a battery. After reaching steady state, the electric energy stored in the capacitor is UE . Select the correct claim about the amount of work needed

Dat Tran asked Dec 23, 2023

by Dat Tran

5.4k points

1 answer

4 votes

191k views

Question 1:An athlete runs in a straight line along a flat surface. He starts from rest and for 20 seconds accelerate at a constant rate. In this first 20 seconds he covers a distance of 100m. For the

Cardern asked Dec 23, 2023

by Cardern

5.8k points

1 answer

2 votes

52.2k views

Question 2 of 5What would you do to measure the current in a resistor?A. Connect a voltmeter in parallel with the resistorB. Connect an ammeter in series with the resistorC. Connect an ammeter in parallel

Papar asked Dec 23, 2023

by Papar

5.0k points

1 answer

4 votes

198k views

The heaviest invertebrate is the giant squid, which is estimated to have a weight of about 0.37 tons spread out over its length of 40 feet. What is its weight in newtons

Assia asked Dec 22, 2023

by Assia

5.7k points

2 answers

16 votes

127k views

Which is NOT a type of simple machine? * O W O Pulley O Wedge Wheel and Axel These are ALL simple machines

Dudley asked Dec 22, 2023

by Dudley

5.5k points

1 answer

4 votes

50.0k views

Explain what reaction time has to do with freefall:

Vedesh asked Dec 22, 2023

by Vedesh

5.3k points

1 answer

4 votes

225k views

What has the 2nd longest wavelength on the electromagnetic spectrum? A. radio waves B. infrared waves C. visible light D. gamma rays

Kiran Kumar Kotari asked Dec 22, 2023

by Kiran Kumar Kotari

5.3k points

1 answer

7 votes

166k views

what is the volume in cubic centimeters of a cube with sides of 0.774 m? express the answer to the proper number of significant figures.

Topanga asked Dec 22, 2023

by Topanga

5.8k points

1 answer

3 votes

163k views

Can mechanical energy be used to do work?

Duffymo asked Dec 22, 2023

by Duffymo

5.9k points

1 answer

15 votes

177k views

1. how does a waveform change when you increase the frequency? 2. how does the sound change when you increase the frequency of the waveform? 3. how does the waveform change when you decrease the frequency?

Bigbug asked Dec 22, 2023

by Bigbug

5.2k points

1 answer

23 votes

203k views

when an object is moved from rest at point a to rest at point b in a gravitational field, the net work done by the field depends on the mass of the object and

Kaustubh Najan asked Dec 22, 2023

by Kaustubh Najan

5.5k points

1 answer

5 votes

211k views

Find the force in free space between two like point charges of one coulomb each placed one metre apart

Danira asked Dec 22, 2023

by Danira

5.4k points

1 answer

21 votes

156k views

Why cant we see our surroundings clearly when we enter a darkened cinema hall

Akskap asked Dec 22, 2023

by Akskap

5.5k points

2 answers

10 votes

197k views

Three rods of different materials P, Q, and R, are charged by various methods. When the rods are brought near each other, the rods P and Q repel each other, while the rods P and R attract each other.Which

Ptkoz asked Dec 22, 2023

by Ptkoz

5.7k points

1 answer

5 votes

157k views

From what height must a water balloon be dropped in order to have a velocityof 12 m/s when it reaches the ground? (Hint: KEinitial = 0, PEfinal = 0.)A. 15 mB. 0.61 mC. 72 mO D. 7.3 mSUBMIT

Roepit asked Dec 22, 2023

by Roepit

5.1k points

1 answer

5 votes

111k views

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