Questions in physics

Questions in physics

📝 Answered - Suppose a magnetic reversal occurred today. How would new rocks at mid-ocean ridges differ from rocks that formed last year?

📝 Answered - What is the difference in the charges on a balloon rubbed in your hair and a glass rod rubbed with silk? Why?

📝 Answered - Gravity and friction are two kinds of A. inertia B. forces C. masses D. gravity

📝 Answered - A cheetah is hunting. Its prey runs for 7.4 s at a constant velocity of 11.3 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey in the same time?

📝 Answered - What is a lunar eclipse?

📝 Answered - Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. - The blue car accelerates uniformly at a rate of 5.8 m/s\(^2\) for 3.3 seconds. It then continues at a constant speed for 9.8 seconds, before applying the brakes such that the car’s speed decreases uniformly, coming to rest 255.79 meters from where it started. - The yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop. Question: 3) How far does the blue car travel before its brakes are applied to slow down?

📝 Answered - A turntable is designed to acquire an angular velocity of 32.4 rev/s in 0.5 seconds, starting from rest. Find the average angular acceleration of the turntable during the 0.5-second period. Answer in units of rad/s².

📝 Answered - How could you compare the energy carried in two different longitudinal waves?

📝 Answered - How does transpiration play a role in the water cycle?

📝 Answered - Two identical freight cars roll without friction towards each other on a level track. One car rolls at 2 m/s, and the other at 1 m/s. After the cars collide, they couple and roll together with a speed of: