3 years ago

Altacts

Physics

1 answer:

Rama09 [41]3 years ago

6 0

5 is the answer first then 4

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A 2kg baseball has a momentum of 75 kg m/s. Find it’s speed

almond37 [142]

Answer:

37.5m/s

Explanation:

momentum = mass x velocity

momentum / mass = velocity = speed

75kg*m/s / 2kg = 37.5m/s

6 0

3 years ago

Which is in the Moneran kingdom? A. plants B. bacteria C. animals D. mushrooms

Stells [14]

Answer: b

Explanation:

6 0

3 years ago

When two point charges are a distance d part, the electric force that each one feels from the other has magnitude F. In order to

Contact [7]

Answer:

Because the force is inversely proportional to the square of the distance

Explanation:

The magnitude of the electrostatic force between two charged particles is given by

$F=k\frac{q_1 q_2}{d^2}$

where

k is the Coulomb's constant

q1, q2 are the magnitudes of the two charges

d is the distance between the two charges

We observe that the magnitude of the force is inversely proportional to the square of the distance.

Therefore, when the distance changes to

$d'=\frac{d}{\sqrt{2}}$

The force will double:

$F'=k\frac{q_1 q_2}{(d/\sqrt{2})^2}=2(k\frac{q_1 q_2}{d^2})=2F$

5 0

4 years ago

Alice kicks a 0.25 kg soccer ball with 0.5 N of force. What force does the ball exert on Alice’s foot as she kicks it

Lelechka [254]

You do not doubt it. The third Law of Newton really works. I would say it is the most reliable law of the Universe. Action and reaction. It is not subject to special conditions, it works always. If an object exerts a force over other object, the second object exerts a force of equal magnitude but in the opposed direction over the first.

So, the answer, undoubtedly, is that the ball exerts a force of 0.5 N over Alices's foot as she kicks it.

7 0

4 years ago

Read 2 more answers

If we measure the temperature of a blackbody to be about 300 K (a typical air temperature in Florida), at what wavelength would

Nostrana [21]

Answer:

9.66 x 10^-6 m

Explanation:

Use the Wein's displacement law

$\lambda _{m}\times T = b$

Where, b is the Wein's constant

b = 2.898 x 10^-3 meter-kelvin

So, λm x 300 = 2.898 x 10^-3

λm = 9.66 x 10^-6 m

3 0

4 years ago