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Vladimir [108]
3 years ago
11

What will happen if you rub two different materials together?

Physics
2 answers:
Dafna1 [17]3 years ago
6 0
It will cause heat from friction
Ulleksa [173]3 years ago
6 0
Sometimes, electrons can also be tranferred
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How can the length of day affect temperatures on Earth?
Alexandra [31]

Answer: Hello, While increased daylight can have some effect on the higher temperatures in the summer, most of temperature rise results from the directness of the Sun, not the increased daylight. ... During the winter, daytime lasts shorter than 12 hours; during the summer, it lasts longer than 12 hours.

Explanation: Hope this helps :)

5 0
3 years ago
Describe the forces that are acting on a person who is standing still on a sidewalk, and identify whether the forces are balance
mr_godi [17]

Answer:

a. i His weight and the normal force on him due to the ground

ii The weight and the normal force are balance

b. There are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.

Explanation:

a. i Describe the forces that are acting on a person who is standing still on a sidewalk

His weight and the normal force on him due to the ground act on him while the person is standing on the sidewalk

ii. identify whether the forces are balanced or unbalanced.

The weight and the normal force are balance because, the person does not move in the vertical or horizontal direction.

b. Describe how the forces would change if the person started walking.

When the person starts walking, the backward push due to his leg on the ground and the frictional force between his feet and the ground now acts on him in the horizontal direction. The frictional force acts in the forward direction and tends to move him forward. His weight and normal force on his feet still act vertically and are both balanced since he does not move in the vertical direction.

<u>So, there are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.</u>

6 0
3 years ago
A ball has 2 kg*m/s of momentum when thrown with a velocity of 8 m/s outwards. Find the mass of the ball.
worty [1.4K]

Answer:

As, we know momentum = mass × velocity that is p = mv

we have momentum (p) = 2 kg m/s

and velocity (v) = 8 m/s

so substitute values in p=mv

2 kg m/s = m × 8 m / s

m = 2 / 8 kg = 0.25 kg

Therefore, mass of substance is 0.25 kg.

2/8 in fractional form.....

Hope it helps

Please mark me as the brainliest

Thank you

5 0
3 years ago
Which of jupiter’s moons is the largest moon in the solar system?.
olga nikolaevna [1]

Answer:

Ganymede

Explanation:

Jupiter’s Moon Ganymede is the largest Moon in the solar system. It’s even larger than the planet Murcury.


I hope it helps! Have a great day!

Muffin ^^

7 0
2 years ago
The radius of the earth's very nearly circular orbit around the sun is 1.5 1011 m. find the magnitude of the earth's velocity, a
kotykmax [81]
The radius of Earth's circular trajectory is
R=1.5*10^{11} m
The time for the Earth to travel around the Sun is
t=365(days)*24(hours)*3600(seconds) =3.1536*10^7 (s)
Thus the velocity is velocity
v=2\pi R/t =2\pi *1.5*10^{11}/(3.1536*10^{7})=2.99*10^4 (m/s)
From this we can deduce the centripetal acceleration
a=v^2/R =(2.99*10^4)^2/(1.5*10^{11}) =5.96*10^{-3}  (m/s^2)
Angular velocity is
\omega =v/R =(2.99*10^4)/(1.5*10^{11})=2*10^{-7} (rad/s)

5 0
3 years ago
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