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galina1969 [7]
3 years ago
14

Pls help need it NOW

Physics
2 answers:
liraira [26]3 years ago
8 0

Answer:

A

Explanation:

kaheart [24]3 years ago
4 0
It’s a... in the nucleus
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A student throws a 120 g snowball at 7.5 m/s at the side of the schoolhouse, where it hits and sticks. Part A What is the magnit
KengaRu [80]

Answer:

5.00 N

Explanation:

Force: This is defined as the product of mass and acceleration. The S.I unit of Force is Newton ( N).

Mathematically,

F = ΔM/t...................... Equation 1

Where F = Force needed to stop the snowball, ΔM = change in momentum, t = time.

But

ΔM = mΔv

ΔM = m(v-u)......................... Equation 2

Where m = mass of the snowball, Δv = change n velocity of the snowball, u = initial velocity, v = final velocity.

Substituting equation 2 into equation 1

F = m(v-u)/t...................... Equation 3.

Given: m = 120 g = 120/1000 = 0.12 kg, v  = 0 m/s, u = 7.5 m/s, t = 0.18 s

Substituting into equation 3,

F = 0.12(0-7.5)/0.18

F = -0.9/0.18

F = - 5.00 N.

From newtons third law of motion,

The Force need to stop the ball is equal and opposite to the force on the wall( Average force by the ball)

Therefore,

The average force on the wall = 5.00 N in opposite direction to the motion of the snowball

6 0
3 years ago
Um relógio de ponteiros funciona durante um mês. Qual é, em N.C, o número de voltas, aproximadamente, que o ponteiro dos minutos
Margaret [11]
I can’t understand I’m sorry but if you need help with math I can help you
7 0
4 years ago
1) Radiation from the sun can be deflected or contained by
earnstyle [38]

Answer:

b

Explanation:

light colors deflect ligjt

7 0
3 years ago
Bowling balls can be made from a variety of substances and are required to have a circumference of roughly 27.2 inches. The cons
Daniel [21]

Answer:

The bowlling shell's thickness is 2.7"

Explanation:

The geometry of the problem is based in the differences between the volumes in a small sphere and a spherical shell, both objects compose the total volume of the bowling ball.

The equivalence in the total ball height and the equivalent height in the fluid (in this case water displacement of half ball volume) is used for calculating the forces state that allows the static balance of the ball and the flotation force from the fluid (Archimedes principle).

In the image is showed the formulation.

4 0
4 years ago
Two glass rods are rubbed together. One of the glass rods are brought near (but
ruslelena [56]

Answer:

The correct answer is - do nothing.

Explanation:

If two same or identical objects, in this instance two glass rods, were rubbed together they neither attract nor repel each other as there is no transfer of electrons from one material to the other material as there is no difference in their charges.

Only two different objects are able to transfer electrons from one material to the other material if rubbed together, to produce the conditions for static electricity to be observed. Therefore there would be no charge on the glass rod so there would be no charge to balls to repel or attract.

5 0
3 years ago
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