Physics, 21.10.2020 01:01 corbinfisher
On top of a cliff of height h, a spring is compressed 5m and launches a projectile perfectly horizontally with a speed of 75 m s . It hits the ground with speed 90 m s . How high above the ground was the cliff? (Hint: use energy conservation to make the problem easier!)
Answers: 2
Physics, 22.06.2019 02:00
How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?
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Physics, 22.06.2019 06:10
Which transition by an electron will release the greatest amount of energy? oa ob oc od
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Physics, 22.06.2019 12:30
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
Answers: 1
Physics, 22.06.2019 14:00
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
Answers: 1
On top of a cliff of height h, a spring is compressed 5m and launches a projectile perfectly horizon...
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