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Allisa [31]
3 years ago
13

Which object has stored gravitational potential energy

Chemistry
2 answers:
inessss [21]3 years ago
6 0

Answer: It is a leaf hanging on a tree

Explanation:

Gravitational Potential Energy (GPE) is energy that is stored and ready to be transformed to kinetic energy when it becomes in motion.

A light bulb has heat and light energy, so it can't be that

A mouse eating cheese is the mouse taking in chemical energy, so no

A car sitting in the driveway has chemical potential energy because it cant move unless the ignition transforms into kinetic energy.

So the only option left is a leaf hanging on a tree.

kakasveta [241]3 years ago
5 0

Answer:a lightbulb burning

Explanation:

Apex

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How much heat in j is giving out when 85.0g of lead cools from 200.0 c to 10.0c
photoshop1234 [79]

Answer:

q = - 2067.2 J of Heat is giving out when 85.0g of lead cools from 200.0 c to 10.0 c.

Explanation:

The Specific Heat capacity of Lead is 0.128 \frac{J}{g\ ^{0}C}

This means, increase in temperature of 1 gm of lead by 1 ^{0}\ C will require 0.128 J of heat.

Formula Used :

q = m.c.\Delta T

q = amount of heat added / removed

m = mass of substance in grams = 85.0 g

c = specific heat of the substance = 0.128

q = m.c.\Delta T = Change in temperature

                                          = final temperature - Initial temperature

                                          = 10 - 200

                                          = -190 ^{0}\ C

put value in formula

q = -  85\times 0.128\times 190

On calculation,

q = - 2067.2 J

- sign indicates that the heat is released in the process

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Answer:

An experiment is an investigation in which a hypothesis is scientifically tested. In an experiment, an independent variable (the cause) is manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. An advantage is that experiments should be objective.

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