Physics

Physics, 24.09.2019 17:00, eminh5145

How much energy is in each pulse, in joules?

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Physics, 25.06.2019 16:00, sethjohnson386pbnm3x

An object with a potential energy of 200 joules is dropped from a height of 2.00 meters. what is its kinetic energy when it reaches the ground? a. 50 joules b. 100 joules c. 200 joules d. 400 joules

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Physics, 20.07.2019 04:00, nothingworksoutforme

In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. if the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ground? a) 1.2 joules b)4.9 joules c)2.0 joules d)6.8 joules

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Chemistry, 08.08.2019 01:20, katelynevette8502

You are a scientist working on increasing the efficiency of appliances to waste less electricity. you are running experiments measuring the input, output, and waste energy from 3 light bulbs. given the data below, determine which model has the lowest percentage of energy lost as waste.lightbulb 1: 200 joules in, 50 joules wasted, 150 joules outlightbulb 2: 100 joules in, 30 joules wasted, 70 joules outlightbulb 3: 150 joules in, 100 joules wasted, 50 joules out

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Physics, 14.10.2019 14:30, cp838761

a light bulb converts electrical energy into light energy and also some thermal energy. the amount of electrical energy is 50 joules before the conversions. what is the total amount of energy from before the conversions to after the conversions? question 6 options: 45 joules because some energy is lost when it is put off as heat. 100 joules because you start with one form of energy and end up with two forms, so a number of energy doubles. 50 joules because as energy converts from one form to another, it cannot be created or destroyed during the conversion. 55 joules because as more electricity comes from the light bulb, the joules increase.

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