Ask question

Ask question

All categories

skelet666 [1.2K]

3 years ago

15

Which use of a simple machine changes the direction of a force? A. using a ramp to load boxes onto a truck B. using an axe to sp

lit wood C. removing a bottle cap with a bottle opener D. lifting a rock with a crowbar

1 answer:

kiruha [24]3 years ago

8 0

A. <span> using a ramp to load boxes onto a truck </span>

You might be interested in

What is occurring when a light wave goes through a pane of glass in a window?

ycow [4]

Answer:

transmission: the passing of a wave through an object

Explanation:

5 0

2 years ago

1. Earth releases about 44-46 Tw of heat, in fact heat can be converted into

Aleksandr [31]

Answer:

even if it all could be used, it wouldn't be enough

Explanation:

The land area of the US is about 5.45% of the world's area, so the amount of released heat over the area of the US is on the order of 2.4 Tw. Current technology for converting geothermal energy to electricity is about 12% efficient, so the available energy might amount to 0.29 Tw if it could all be captured.

Energy consumption in the US in 2019 was on the order of 0.46 Tw. This suggests that even if <em>all</em> of the thermal energy radiated by the Earth from the US could be turned to useful forms of energy, it would meet only about 60% of the US need for energy.

8 0

3 years ago

Two charges that are separated by one meter exert 1-n forces on each other. if the magnitude of each charge is doubled, the forc

Goshia [24]

The electrostatic force between the two charges is
$F=k_E \frac{q_1 q_2}{r^2}$
where q1 and q2 are the magnitudes of the two charges, and r the distance between them.

We can see from the formula that F is proportional to the product between the two charges:
$F \sim q_1 q_2$
so, if the magnitude of each charge is doubled, the new force will get a factor 4:
$F' \sim (2 q_1 )(2 q_2 )=4 q_1 q_2 =4 F$
So, the new force will be 4 times the original force:
$F' = 4 \cdot 1N= 4N$

5 0

3 years ago

Choose all the answers that apply. Which of the following occurs during data analysis? observations are made statistical informa

denis23 [38]

Answer:

Both of them.

Explanation:

They are both because when your analyzing data , that is what happen's.

6 0

3 years ago

7. A box is pulled straight across the floor at a constant speed. It is pulled with a horizontal force of 48 N.

Leya [2.2K]

Answer:

a)Taking into consideration Newton’s second law, we know that

Net_Force = mass * acceleration

Since the box is pulled at constant speed, the acceleration is equal to zero.

This means that

Net_Force = 0 N

b) Force of friction

The net force is equal to the sum of all forces,

Net_Force = Force_applied - Friction

We found that Net_Force = 0, which means

Friction = Force_applied = 48 N

c) If the box comes to a stop. And the applied force becomes zero, the friction force becomes also zero.

Friction = 0 N

4 0

3 years ago