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omeli [17]
3 years ago
10

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. What was the kinetic energy of the roc

k at the midway point of its fall?
Physics
1 answer:
Ahat [919]3 years ago
3 0
2,450 Joules,  kinetic energy is 1/2 mass x velocity squared.
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Putting a beaker of water in a microwave and turning it on for a minute or two will increase the temperature of the water. Descr
Jobisdone [24]

Answer:

The equipment to use is: a beaker, a fixed amount of water, a thermometer.

The mass of water, the time, the temperature for each time should be noted and a graph of Temperature versus time should be made

Explanation:

The design of an experiment is to place the beaker in the microwave, with a good amount of water (approximately ⅔ of its capacity) and turn it on for small periods of time, generally the minimum is 30 s, quickly open the microwave, place a thermometer or better yet an infrared thermometer to measure the temperature of the water; repeat this several times.

The advantage of the infrared thermometer is that it reduces the transfer of heat between the water and the thermometer.

The mass of water, the time, the temperature for each time should be noted and a graph of Temperature versus time should be made.

The equipment to use is: a beaker, a fixed amount of water, a thermometer.

The main precaution that must be taken is not to open the microwave while it is on.

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2 years ago
What is cytoplasm in a animal cell?
qaws [65]

Answer:

Cytoplasm is the jelly-like fluid that fills in all of the. space between the nucleus and the plasma membrane. All of the organelles within a cell are suspended in this fluid. The main function of the cytoplasm is to support the internal structures of the cell as well as maintaining shape and consistency of the cell.

6 0
2 years ago
Which statement is true about the gravitational force?
topjm [15]

Hello,

I think that A is the right one.

6 0
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This is a fossil of dinosaur footprints this fossil can give clues about the dinosaurs
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I think the answer is size
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The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660 . A beam of white light in
Alinara [238K]

Answer:

The angular separation between the red and violet components of the spectrum that emerges from the glass is 1.72°

Explanation:

Given:

Refractive index for red light n _{1} = 1.620

Refractive index for violet n' _{1} = 1.660

Refractive index for air n_{2} = 1

Incident angle \theta _{1} = 28.30°

According to the snell's law,

    n_{1} \sin \theta _{1} = n_{2}   \sin \theta _{2}

For red light,

  1.620 \times \sin 28.30 = 1 \sin \theta _{2}

Where \theta _{2} = transmitted angle for red light

   \theta _{2} = 50.18°

For violet light,

  1.660 \times \sin 28.30 = 1 \sin \theta' _{2}

Where \theta' _{2} = transmitted angle for violet light

   \theta' _{2} = 51.9°

Angular separation between red and violet light is given by,

  \theta ' _{2} - \theta _{2} = 51.9 -50.18 = 1.72°

Therefore, the angular separation between the red and violet components of the spectrum that emerges from the glass is 1.72°

6 0
2 years ago
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