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spayn [35]
2 years ago
5

Which term describes what a british thermal unit measures?.

Physics
1 answer:
Yakvenalex [24]2 years ago
8 0

Answer:

it is a measure of the heat content of fuels or energy sources

Explanation:

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M=-2 the imagine equals what?
WITCHER [35]

Answer:

Image is twice as large as the object, and inverted

Explanation:

When an object is placed in front of a mirror, the mirror produces an image.

The magnification of the image is a number telling how much the size of the image is enlarged/diminished with respect to the object.

It is given by

M=\frac{y'}{y}

where

M is the magnification

y' is the size of the image

y is the size of the object

In this problem,

M = -2

This means that:

y'=My\\y' = -2y

So, we can conclude the following:

- The size of the image is twice the size of the real object

- The image is also inverted, because of the presence of the negative sign in the equation

8 0
3 years ago
You are climbing in the high sierra when you suddenly find yourself at the edge of a fog-shrouded cliff. to find the height of t
sergey [27]
The total time it takes the sound to reach our on top of the cliff (10.0 s) is actually sum of two times:
- the time it takes the rock to hit the ground starting from the top of the cliff, t1
- the time it takes the sound to reach the top of the cliff starting from the ground, t2
1) The rock moves by uniformly accelerated motion, with constant acceleration g=9.81 m/s^2. Its law of motion is given by y(t)=h-v_0t-\frac{1}{2}gt^2, where v_0=0 is the initial velocity of the rock, and h is the height of the cliff. The time t1 is the time at which the rock reaches the ground, so that y(t1)=0, and the equation becomes
0=h-\frac{1}{2}gt_1^2
2) The sound moves from the ground to the top of the cliff by uniform motion, with constant speed v=343 m/s. Therefore, the sound covers the distance h (the height of the cliff) in a time t2 given by
h=vt_2
3) If we rewrite h in both equations, we can write:
=\frac{1}{2}gt_1^2=vt_2 (1)
4) We also know that the sum of t1 and t2 is equal to 10 seconds:
t_1+t_2=10
from which we find
t_2=10-t_1
if we substitute this into eq.(1), we get
\frac{1}{2}gt_1^2+vt_1-10v=0
Numerically:
4.9t_1^2 + 343 t_1 - 3430=0
Solving the equation, we find the solution t_1=8.87 s (the other solution is negative, so it does not have physical meaning). As a consequence,
t_2 = 10-t_1 = 1.13 s
and the height of the cliff is given by
<span>h=vt_2=(343 m/s)(1.13 s)=388 m</span>
3 0
2 years ago
Read 2 more answers
Which statement is true about the inner planets of our solar system
poizon [28]
B they formed from the dense elements as compared to the others in the solar system
4 0
3 years ago
A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10×104 m/s2 , and 1.85 ms (1 ms = 10−3
ankoles [38]

Answer:

u = - 38.85 m/s^-1

Explanation:

given data:

acceleration = 2.10*10^4 m/s^2

time = 1.85*10^{-3} s

final velocity = 0 m/s

from equation of motion we have following relation

v = u +at

0 =  u + 2.10*10^4 *1.85*10^{-3}

0 = u + (21 *1.85)

0 = u + 38.85

u = - 38.85 m/s^-1

negative sign indicate that the ball bounce in opposite directon

4 0
3 years ago
when the heat is added to the material, which factors are important in order to determine how much the material will rise in tem
posledela

The heat Q transferred to cause a temperature change depends on the magnitude of the temperature change, the mass of the system, and the substance and phase involved.

Explanation:

https://courses.lumenlearning.com/physics/chapter/14-2-temperature-change-and-heat-capacity/

5 0
3 years ago
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