2 years ago

Please help me fast please help

Physics

1 answer:

inysia [295]2 years ago

4 0

Answer:

the net energy Gained per hour equals 30Kcal/h

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According to the first rule, if a force pulls on one end of a rope, the tension in the rope equals the magnitude of the pulling

mixer [17]

Answer:

Explanation:

Here in the question the mass of the pulley is zero, hence, the tension in the cable throughout is same.

magnitude of tension in rope 1 is

T1= F

Hence the tension T1 is rope 1 is F.

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3 years ago

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How much current is in a circuit that includes a 9-volt battery with a resistance of 3

Darya [45]

Just remember
Voltage = current times resistance

current = voltage over resistance

Current = 9/3 = 3

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2 years ago

What is the index of refraction of a material in which the speed of light is 7.50% slower than the speed of light in vacuum?

Inessa [10]

Answer:

The value is $n = 1.081$

Explanation:

From the question we are told that

The speed of in a vacuum is $c = 3.0 *10^{8} \ m/s$

The speed of light in the material is $v = c -0.075c = 0.925 c = 0.925 * 3.0*10^{8} = 2.775 *10^{8} \ m/s$

Generally the reflection of the material is mathematically represented as

$n = \frac{c}{v}$

=> $n = \frac{3.0*10^{8}}{2.775 *10^{8}}$

=> $n = 1.081$

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2 years ago

Cells are the basic building block that makes up all living things. Cells are microscopic. What does this mean?

Archy [21]

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microscopic means that they are very very tiny, you cannot see them with the human eye, you have to use a tool like a microscope

Explanation:

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3 years ago

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What is the discharge of a stream that is one meter deep, two meters wide, and has a water flow of 5 meters per second

Svet_ta [14]

Answer:

10 m^3 /s

Explanation:

1 m X 2 m X 5 m /s = 10 m^3/s

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1 year ago

Please help me fast please help​

Please help me fast please help