What happens when you magnetize a paper clip?? help

A force of 1 N is equal to which combination of SI units?

zavuch27 [327]

Answer:

F = M a = kg * m/s^2

1 N = 1 kg * m/s^2

(B) is correct

4 0

2 years ago

A small rock is thrown vertically upward with a speed of 22.0 m/s from the edge of the roof of a 30.0-m-tall building. The rock

denis-greek [22]

Answer:

a) $v=32.74\frac{m}{s}$ .

b) $t=\frac{v-v_0}{g} =5.58s$ .

Explanation:

a) What is the speed of the rock just before it hits the street?

From Kinematics we have $v^2= v_0^2+2a(y_f-y_i)$ .

If we take the top of the roof as the position $y_0=0m$ , then

$y_f=-30m$ and we have (also, $a=g=-9.8\frac{m}{s^2}$ ) :

$v^2= v_0^2+ 2ay_f$ ⇒ $v= \sqrt{v_0^2+ 2ay_f}$

⇒ $v=32.74\frac{m}{s}$ .

b) How much time elapses from when the rock is thrown until it hits the street?

From Kinematics we have $v(t)=v_0+at=v_0+gt$

When the rock touches the ground:

$v=-32.74\frac{m}{s}$

With a minus sign to indicate the vector velocity points down.

$t=\frac{v-v_0}{g} =5.58s$

(remember that $g=-9.8\frac{m}{s^2}$ )

3 0

3 years ago

Earth’s surface is subjected to unusually high rates of weathering. The Moon and some of the inner planets of our solar system a

Komok [63]

<h2>Answer:</h2>

<em><u>Running water on the Surface of Earth.</u></em>

<h2>Explanation:</h2>

Weathering can be defined as the phenomenon of breaking or disintegration of the rocks, minerals, soil etc. due to coming in contact with the Earth's atmosphere such as the Water, Wind, Organisms etc.

In this process the rocks, minerals disintegrate into lot of small particles.

But the rate of weathering on Earth is at a very unusual or unique rate because Earth's surface has the presence of the running water that leads to the high rate of surface weathering.

<em><u>Therefore, the reason of Earth's rapid weathering rates is Running water on the Surface of Earth.</u></em>

3 0

3 years ago

As the temperature of an object increases, the wavelength of the brightest light emitted _______

alexira [117]

Answer:

option (B) decreases

Explanation:

According to the Wein's displacement law, the minimum wavelength of the radiated emission is inversely proportional to the absolute temperature of the body which emits radiation.

$\lambda_{m}\alpha \frac{1}{T}$