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alexandr1967 [171]
3 years ago
12

True or false:The potential energy of an object is affected by its speed

Physics
1 answer:
Verdich [7]3 years ago
7 0
True because the speed of a mass can change it's gravitational potential energy in the gravitational field of another massive object.
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Are these two correct ?
gulaghasi [49]

Answer:

7. Your answer is correct dear, just add the unit

8. answer is 1.17m/s²

Explanation:

queation 7.

m = 3kg, F = 9N, a ?

F = ma

a = F/m = 9/3 = 3m/s²

Use the same approach for question 8

5 0
3 years ago
What are scientists who study space called?
Brilliant_brown [7]

Answer:

Astronomer

Explanation:

A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars, is called an astronomer. These days, the terms astronomer and astrophysicist are used interchangeably, to talk about any physicist who specializes in celestial bodies and the forces that affect them.

4 0
3 years ago
Read 2 more answers
Calculate the critical angle for light going from Glycerine to air.
Georgia [21]
The refractive index for glycerine is n_g=1.473, while for air it is n_a = 1.00.

When the light travels from a medium with greater refractive index to a medium with lower refractive index, there is a critical angle over which there is no refraction, but all the light is reflected. This critical angle is given by:
\theta_c = \arcsin ( \frac{n_2}{n_1} )
where n1 and n2 are the refractive indices of the two mediums. If we susbtitute the refractive index of glycerine and air in the formula, we find the critical angle for this case:
\theta_c = \arcsin ( \frac{1.00}{1.473} )=42.8^{\circ}
6 0
2 years ago
How much does the Earth weigh?<br><br><br><br> Have an AWESOME day<br> -NaomiTheGenuis
babymother [125]

Answer:

The Earth weighs about:
13,170,000,000,000,000,000,000,000 pounds

or

5.97 billion trillion metric tons



Explanation:

Have a great rest of your day
#TheWizzer

3 0
1 year ago
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Veins contain a network of valves to insure a one-way flow of blood but arteries do not. This is because veins must counteract t
Elena-2011 [213]
They must counteract the force of blood pressure
6 0
3 years ago
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