PHYSICS HIGH SCHOOL

Which two objects have stored energy? A) a ball rolling on the ground
B) a small rock sitting on top of a big rock
C) a stretched rubber band
D) a stone lying on the ground

Answers

Answer 1
Answer:

a ball rolling on the ground

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What is a caliper used for?to make a precise measurement of volume
to make a temperature measurement with low precision
to make a volume measurement with low precision
to make a precise measurement of length

Answers

Answer;

To make a precise measurement of length

Explanation;

  • Calipers are used to make a precise measurement of length such as diameters of circular solids, such as the diameter of a pipe.
  • All calipers may be used to take the same measurements, that is the inside, outside, depth and the step measurements.Those calipers such as vernier caliper that can be used to measure the external size of an object have a pair of jaws.
  • Vernier caliper is a type of caliper that is  used to precisely measure outside dimensions such as length, width, or diameter.

a caliper is used to make a precise measurement of length within tubing or on nuts/bolts, or anything really

In lifting a small fridge weighing 240N, a potential energy change of 80J takes place. How high is the fridge lifted. Gravity=10 N/Kg

Answers

Explanation:

Potential Energy = mg h      mg =  240 N

                  80 = 240 h    

                   h = 80 / 240 = 1/3 meter  ( 33.3 cm)

The largest mass extinction event in the history of the Earth occurred at the end of the _______ period.

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The largest mass extinction event in the history of the Earth occurred at the end of the Paleozoic Era. This happened more than 250 million years ago. During this mass extinction, the entire dinosaur population was wiped out. There was approximately 96% of all the life forms on Earth destroyed during this time period. 

Which phrase is an example of kinetic energy? Responses a car sitting motionless a car sitting motionless a girl running in a race a girl running in a race a sled sitting at the top of a hill a sled sitting at the top of a hill a tank containing gasoline

Answers