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Schach [20]
3 years ago
14

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is

Chemistry
1 answer:
Art [367]3 years ago
5 0
Hi! Well the formula of kinetic energy is Ke = 0.5 x M x V^2
0.5 x 0.5 x 10^2
0.25 x 20
5 J (joule)
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Water learned in science class that different substances release heat at different rates. He decides to test this. At home, Walt
Shalnov [3]

Answer:

The correct answer will be

Test variable or dependent variable- The time required to melt the ice cube

Explanation:

In a scientific experiment, three types of variables are kept and studied which includes: The independent variable, dependent variable and the constant variable.

Among these three, the variable to be tested is known as the dependent variable which is influenced by the independent variable which changes.

In the given question, since the experiment was performed to test the rate of the release of heat by a different substance which could be tested by measuring the rate or time required to melt the ice cube which depends on the type of casserole.

Thus, the time required to melt the ice cube is the correct answer.

7 0
3 years ago
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All of the following describe work being done except:
SIZIF [17.4K]

Answer:

A. standing in line to pay for groceries.

Explanation:

Just standing there is not doing work, All of the other options are examples of work.

7 0
3 years ago
What is the agent that causes frost wedging?
LuckyWell [14K]

Answer:

Freeze wedging is caused by the repeated freeze-thaw. Frost wedging occurs as the result of 9% expansion of water when it is converted to ice. Cracks filled with water are forced further apart when it freezes.

4 0
2 years ago
Multiply the following and express your answer in appropriate scientific notation, and a correct number of significant figures.
7nadin3 [17]

Answer:

2

Explanation:

8 0
2 years ago
Which of the following would be part of an aquatic ecosystem?
Masja [62]

Answer:

Aquatic ecosystem has two components -

  1. Biotic components

     2.Abiotic components

temperature and amount of sunlight are the part of abiotic component .

while living things like sponges and planktons are the biotic components of ecosystem.

Explanation:

aquatic components are of two types-

freshwater ecosystem( lakes and ponds, river and streams)

marine ecosystem(ocean ecosysyem, estuaries)

planktons-

planktons are found in limnetic zone, availability of sunlight is much here. planktons  are zooplanktons and phytoplanktons  are very important link in aquatic ecosystem.

sponges

In marine water, the <em>benthic zone</em> is the area below the<em> pelagic zone.</em> Here temperature decreased because of less light perception. This zone is very nutrient rich so organisms which are present here are- bacteria, fungi, sea anemone, sponges and some fishes.

3 0
3 years ago
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