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1. What is the difference between mass and weight? On earth, what is the weight of a 1 kg mass?
2. When your textbook says that the moon "falls around the earth," does it mean that the moon will eventually fall from the sky and hit the earth? If not, what does it mean?
3. On a winter day, is it scientifically correct to say that the inside of your house is chilly because "cold seeps through the windows from outside"? Why or why not? What might you say instead?
4. Can sound travel through a vacuum? Why or why not?
5. A. A circuit has a resistance of 4 ohms and a potential difference of 8 volts across it. What is the current in the circuit? (Presume the circuit obeys Ohm's law.) Show your calculations.
6. B. How much power does the circuit in part A draw? Show your calculations.
Electrons which were initially at rest were subjected to a continuous force of 2×10-12 newton along the entire length of two miles (one mile is 1.6 kilometers) and reached speeds very near the speed of light.
What is current in the coil
What is magnitude of the unknown force
What is the separation distance between speaker and listener
If the coefficient of friction between road and tires on a rainy day is 0.120, what is the minimum distance in which the car will stop.
Two speakers, 6.00 m apart, are driven by the same audio oscillator so that each one produces a sound consisting of two distinct frequencies, 1000 Hz and 1360 Hz. The speed of sound in the room is 350 m/s.
A 52.0 skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 2.90. What speed does he need at the bottom.
On another planet the simple pendulum consisting of a 0.154 kg mass suspended on a 1.20 m long string has a period of 3.860 seconds. What is acceleration on this planet.
A box is put on a slide to move it from one part of a factory to another the slide is at an angle of 20 degrees below the horizontal the coefficient of friction between the box and slide is 0.352 what is the acceleration of the box.
The potential at location A is 392 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 780 V, and when released from rest from this spot, the particle arrives at B wit..
The two forces in each pair could have different physical origins (for instance, one of the forces could be due to gravity, and its pair force might be due to friction or electric charge).
Soccer ball is kicked with a speed of 11.50 m/s at an angle of 30.0° above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air.
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