What components make up fire

Another term for electromotive force is _____. voltage current resistance power

Ray Of Light [21]

Voltage because I said so

3 0

3 years ago

Sitting in a second-story apartment, a physicist notices a ball moving straight upward just outside her window. The ball is visi

gregori [183]

Answer:

1.013 s

Explanation:

You can solve this problem using the equations for constant acceleration motion. The velocity at the bottom of the window can be found using this expression:

$(x-x_o) = \frac{1}{2} at^2 + v_ot = -\frac{1}{2}gt^2 + v_ot$

the gravity is negative as it opposes the movement.

$(x-x_o) = -\frac{1}{2}gt^2 + v_ot\\v_o = \frac{(x-x_o)+\frac{1}{2}gt^2}{t} = \frac{1.19m+\frac{1}{2} 9.81m/s^2(0.2s)^2}{0.2s} = 6.931 m/s$

Now, the time elapsed before the ball reappears is 2 times the time that it takes for the ball to go from the bottom of the window, reach maximum height, and reach again the bottom of the window, minus 2 times the time that it takes for the ball to travel from the top to the bottom of the window. The time that takes to the ball to reach maximum height, or in other words, to time that takes for the velocity of the ball to go from vo to 0m/s:

$t_1 = \frac{0m/s - v_o}{g} = \frac{-6.931 m/s}{-9.81m/s^2} = 0.706 s$

Then:

$t = 2t_1 - 2*0.2s = 2*(0.706s) - 0.4s = 1.013 s$

7 0

3 years ago

A bowl of soup has_____? A:both PE and KE B:PE C:neither PE or KE D:KE

miskamm [114]

Answer:

A.

Explanation:

4 0

4 years ago

A pinhole camera is just a rectangular box with a tiny hole in one face. The film is on the face opposite this hole, and that is

disa [49]

Answer:

Size of image: 1.8 cm inverted

Magnification of camera: -0.1

Explanation:

Given:

$h_o$ = size of bird = 18 cm

$u$ = distance of the bird from the camera = 2 m = 200 cm

$v$ = distance of the film from the camera = 20 cm

Assume:

$m$ = magnification of the camera

$h_i$ = size of image of the bird

Using sign convention, we have

$u = -200\ cm\\v = 20\ cm\\h_o = 18\ cm$

The hole in the pinhole camera behaves as a convex lens. The other face opposite to the hole face behaves like a film where the image is formed to be seen. So, using the formula of magnification, we have

$m = \dfrac{h_i}{h_o}=\dfrac{v}{u}\\\Rightarrow \dfrac{h_i}{h_o}=\dfrac{v}{u}\\\Rightarrow h_i=\dfrac{v}{u}h_o\\\Rightarrow h_i=\dfrac{20}{-200}\times 18\\\Rightarrow h_i=-1.8 cm$

This means the image of the bird measures 1.8 cm in length where negative sign in the calculation represents that the image formed is inverted.

Hence, the image of the bird on the film is 1.8 cm large.

Now, again using the formula of magnification, we have

$m = \dfrac{h_i}{h_o}\\\Rightarrow m = \dfrac{-1.8}{18}\\\Rightarrow m =-0.1$

Hence, the magnification of the camera is -0.1.

4 0

3 years ago

please help!!!!!!!!! He views eating as a think that should only do for fun. Do you see it the same way? If you could, would you

serg [7]

Answer:

I dont think eating is meant for fun. It is meant for survival. There can be some people that see it as a competition but the main purpose of eating is to survive I guess. Im kinda competitive with eating so if I was facing sombody and had to chug a cup of his beverage to avoid taking the time to eat then maybe ya.

Explanation: Main purpose of eating tho is for survival because its a human need you need

6 0

3 years ago

What components make up fire​

What components make up fire