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alina1380 [7]
3 years ago
6

4. A steel rod is 5 cm x 5 cm x 120 cm. If steel has a density of 7.80 g/cm', what is the

Physics
1 answer:
Dahasolnce [82]3 years ago
7 0

Answer:

Mass = 384.615385 gram

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Which unit of measurement is best to estimate the volume of a juice box
stepan [7]

The unit of measurement is best to estimate the volume of a juice box will be kilogram.

<h3>What is volume?</h3>

The capacity of a container like how much quantity of liquid can be filled in that container is called the volume.

The juice bottle is estimated by liter as it contains the liquid. The juice box is a solid cardboard with some volume into which juice bottles are kept. So, the weight will be shown in kilograms.

Thus, the unit of measurement is best to estimate the volume of a juice box will be kilogram.

Learn more about volume.

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2 years ago
the human nervous system can propagate nerve impulses at about 10 squared metered per second. estimate the time it takes to trav
rusak2 [61]
Use the formular d = v x t
d = 2m
v= 100m/s

t= d / v
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3 years ago
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a 100g ice cube at 0 degrees celsius is placed in 650 grams of water at 25 degrees celsius. When the mixture reaches equillibriu
Artyom0805 [142]

Answer:

The latent heat of fusion of water is 334.88 Joules per gram of water.

Explanation:

Let the latent heat of ice be 'x' J/g

1) Thus heat absorbed by 100 gram of ice to get converted into water equals

Q_1=100\times x

2) heat energy required to raise the temperature of water from 0 to 25 degree Celsius equals

Q_2=100\times 4.186\times 11=4604.6Joules

Thus total energy needed equals Q_1+Q_2=100x+4604.6

3) Heat energy released by the decrease in the temperature of water from 25 to 11 degree Celsius is

Q_3=650\times 4.186\times (25-11)\\\\Q_{3}=38092.6Joules

Now by conservation of energy we have

Q_1+Q_2=Q_3\\\\100x+4604.6=38092.6\\\\\therefore x=\frac{38092.6-4604.6}{100}=334.88J/g

6 0
3 years ago
N discussing engines, the ratio of output work to input work expressed as a percentage is called
djyliett [7]

The ration of output work to input work expressed as a percentage is called <u>Efficiency</u>.

5 0
3 years ago
Explaining How Momentum Can Cause
Ghella [55]

Answer:

The astronaut can throw the hammer in a direction away from the space station. While he is holding the hammer, the total momentum of the astronaut and hammer is 0 kg • m/s. According to the law of conservation of momentum, the total momentum after he throws the hammer must still be 0 kg • m/s. In order for momentum to be conserved, the astronaut will have to move in the opposite direction of the hammer, which will be toward the space station.

Explanation:

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2 years ago
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