3 years ago

Which TWO statements about the substances in the experiment are true?

Physics

2 answers:

nataly862011 [7]3 years ago

4 0

Answer:

A and B are correct both are correct

iris [78.8K]3 years ago

4 0

Answer:

answer A and B

A. Quartz is harder than chalk.

B. Water has a higher surface tension than salty water.

Explanation:

did the test !

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A tuba can play a lower note than a flute because

Afina-wow [57]

Answer:

B. There is more room for the air to spread out

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3 years ago

In one cycle, a freezer uses 800 J of electrical energy in order to remove 1735 J of heat from its freezer compartment at 10.0°F

Lubov Fominskaja [6]

Answer:

Explanation:

W = work done by the freezer = 800 J

Q = heat removed from the freezer = 1735 J

Q' = Heat expelled into the room

Coefficient of performance is given as

$\beta = \frac{Q}{W}$

inserting the values

$\beta = \frac{1735}{800}$

$\beta = 2.2$

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Q' = W + Q

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3 years ago

How much force is needed to accelerate at 66 kg skier 4m/s^2 ?

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E force needed to accelerate a 68 kilogram-skier at a rate of
1.2
m
s
2
is 81.6 Net forces.
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1.2
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7 0

3 years ago

A sprinter has a mass of 80 kg and a kinetic energy of 2500 J. What is the sprinter's speed?

nata0808 [166]

Using KE = 1/2mv^2
m = mass (80kg)
v = velocity (?)
KE = kinetic energy (2500J)
2500/((1/2) x (80)) = v^2
Square root the answer to get: 7.91 m/s

3 0

2 years ago

What is the most appropriate tool to use when collecting data from the investigation? List, table, graph or chart?

forsale [732]

A table would be the most appropriate because that way you can compare the data.

6 0

3 years ago