Physics, 09.02.2021 17:50 BeverlyFarmer
1. Acceleration can result from a change of _, or a change in _, or both *
distance, direction
temperature, volume
speed, direction
force, momentum
2. The acceleration is _ when an object is speeding up. *
positive
negative
zero
constant
2. The acceleration is _ when an object is slowing down. *
positive
negative
zero
constant
3. When an object is moving at a constant speed, its acceleration is _. *
positive
negative
zero
constant
4. A roller coaster is moving at 35 m/s at the bottom of a hill. Four seconds later it reaches the top of the hill moving at 7 m/s. What was the acceleration of the coaster? Include: the formula, the work, the units, and mention if the object was accelerating or decelerating. *
5. A train moves from stop to a speed of 30 m/s in 25.0 seconds. What is its acceleration? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating. *
6.How long will it take a car to go from a complete stop to 33 km/hr if they are accelerating at 11 km/hr2? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating.
7.A train was going 100 m/s hit the brakes after seeing a deer who decided to have a nap on the train tracks. It took the train 1 minute 40 seconds to stop, what was the train’s acceleration? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating.
8. Write a short story that contain an acceleration/decceleration problem. Include numbers and units and solve for the unknown according to your story. Make sure to include the formula, the work, and the right units. *
Answers: 2
Physics, 22.06.2019 05:00, anime333
Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?
Answers: 1
Physics, 22.06.2019 22:00, MickeyAppleX
Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere
Answers: 1
1. Acceleration can result from a change of _, or a change in _, or both *
distance, direction
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