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Questions in physics

[Answered] What is friction? Explain.

[Answered] A cheetah runs with a positive acceleration. What does this tell you about the velocity-time graph for the cheetah? A. Graph with a negative slope B. Graph with a positive slope C. Graph with a positive area D. Graph with a negative area

[Answered] There are 10 apples in a one-kilogram bag of apples. What is the average mass of each apple in the bag? Give your answer in units of kilograms and grams.

[Answered] A horse starts from rest and speeds up with constant acceleration. If it has gone a distance of 100 m at the point when it reaches a speed of 12 m/s, what is its acceleration?

[Answered] An ambulance driving with velocity \(\frac{v}{8}\), where \(v\) is the speed of sound, emits a siren with a frequency of [tex] f_0 [/tex]. What is the frequency heard by a stationary observer toward whom the ambulance is driving?

[Answered] You did 150 joules of work lifting a 120-newton backpack. a. How high did you lift the backpack? b. How much did the backpack weigh in pounds?

[Answered] What planet starts with the letter E?

[Answered] You are standing 1 meter from a squawking parrot. If you move to a distance of 3 meters away, the sound intensity will be what fraction of its original value?

[Answered] A wet towel is hanging on a clothesline in the sun. By what process does the towel dry?

[Answered] A basketball has been left out in the cold. The next day you find that it has become soft. What do you do to get it back to shape and why? A. Leave it alone to warm up B. Pump it up a little C. Get a new basketball