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nikitadnepr [17]
2 years ago
11

An ice skater spins with an angular speed 2w with an angular speed

Physics
1 answer:
sveticcg [70]2 years ago
4 0
Anwser

It decreases The factor of two.

Step by step explanation

If she spin at a angular speed of 2w, and an initial speed of fi, when she slows down she is only has a angular speed of W, meaning that decreased 2

PS the anwser above me is wrong because in the question it said she decree so I couldn’t have stayed the same.

Hope this helps!
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Two metal spheres are suspended from strings. The
nikdorinn [45]

Answer:

B. A repulsive force of 8.0*10^3 N.

Explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

F = \frac{kq_1q_2}{r^2}

here we know that

q_1 = -2 \times 10^2 C

q_2 = -4 \times 10^{-8} C

r = 3.0 m

now we have

F = \frac{(9 \times 10^9)(2 \times 10^2)(4\times 10^{-8})}{3^2}

F = 8000 N

since both charges are similar charges so they will repel each other by the force we calculated above so correct answer will be

B. A repulsive force of 8.0*10^3 N.

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2 years ago
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DENIUS [597]

Answer:

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Explanation:

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4 0
2 years ago
Two 5.0 kilogram objects have different gravitational potential energies. What property of the objects must differ?
ipn [44]

Answer:

Height.

Explanation:

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Mathematically, potential energy is given by the formula;

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Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Hence, the property of the object (having a mass of 5 kilograms) which must differ to have different gravitational potential energies is the height from which they are falling from.

The object having the higher height would have a greater gravitational potential energy than the lower object.

7 0
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Lana71 [14]

Answer:

180 m

Explanation:

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Substituting these data, we find the height of the cliff:

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4 0
3 years ago
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UNO [17]

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2 years ago
Read 2 more answers
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