PHYSICS
HIGH SCHOOL

Answer: Friction slows things down because the force that is created through the interaction between two objects begins to decrease the acceleration and velocity of the object. Therefore, the object begins to slow down.

Answer: Friction slows things down because the tiny rough bumps on all surfaces hook on each other and slow down the object and produce heat

HIGH SCHOOL

A 3 N force pushing to the right on a box causes it to accelerate 6 m/s² to the right. What is the mass of the box? A. 0.5 kg

B. 2 kg

C. 3 kg

D. 18 kg

18 kg would be the answer to that

HIGH SCHOOL

If you moved to a planet that has the same mass as the earth but twice the diameter, how would your weight be affected?

High jump records would not last long on this planet.

F_e is your weight on earth.

2* (r_e) is the radius of the planet you move to

r_e us the radius of the earth.

F_n is your weight on the new planet.

F_n / F_e = (2*r_e)^2 / (r_e)^2

F_n = 4 * F_e

See if you can figure out all the cancellations if you start with F_e = G * test_mass * M_earth /(r_e^2)

F_e is your weight on earth.

2* (r_e) is the radius of the planet you move to

r_e us the radius of the earth.

F_n is your weight on the new planet.

F_n / F_e = (2*r_e)^2 / (r_e)^2

F_n = 4 * F_e

See if you can figure out all the cancellations if you start with F_e = G * test_mass * M_earth /(r_e^2)

MIDDLE SCHOOL

Explain why hot air goes up

Answer:

Hot air is less dense than cool air ; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air .

Answer:

Keep scrolling...

Explanation:

When the temperature of dry air increases, the density of it decreases.As a result, the warmer, and less dense as well, is lighter that normal temperature air.So if warm air currents are under cold air currents, the cold cuurents will go lower.I hope I was helpful.If you any wuestions please contact me

Yours sincerely,

Manos.

COLLEGE

Abus moves to the cast with a speed 10 ms, and a student in the bus moves with a speed 9 m/s to the cust. What is the velocity of the . relative to the bus A. 19 m/s to the cast B. 19 ms to the west c. 1 m/s to the east D. L us to the west.

Answer : The velocity of the student relative to the bus is 1 m/s to the east.

Explanation :

Relative speed : It is defined as the speed of a moving object when compared to the another moving object.

There are two condition of relative speed.

(1) It two bodies are moving in same direction then the relative speed will be the difference of two bodies.

(2) It two bodies are moving in opposite direction then the relative speed will be the sum of two bodies.

As per question,

The speed of bus, = 10 m/s to east

The speed of student, = 9 m/s to east

In this problem, the two bodies are moving in same direction then the relative speed will be the difference of two bodies.

Therefore, the velocity of the student relative to the bus is 1 m/s to the east.