Explain the relationship between heat and physical state of a substance.
Answers
Answer:
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).
Related Questions
You and your friends decide that it would be fun to push a rusty old mining cart down a track. If you push it at 3.1 m/s and friction causes it to accelerate at -0.3 m/s², how long will it roll before it stops?
Which describes how the same force affects a small mass and a large massA.The large mass accelerates faster B.The small mass accelerates faster C.Both accelerate at the same time
What is electromagnetic radiation?
Calculate the wavelength of a radio wave whose frequency is 900 kHz. (v = 3.00 · 108 m/s.)
b.close the diaphragm.
c.adjust the speed of the shutter.
d.adjust the angle of the mirror.
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Answer:
a. move the lens toward or away from the film.
Explanation:
Lets discuss the function of different components of the camera
a). Lens : Lens position is set to focus the image on the film as we know that
here we know that position of lens can adjusted by changing the value of distance from object and that will help to focus the image on the film.
b). diaphragm. = It is used to control the intensity of light to enter into the lens so that light is adjusted.
c). speed of the shutter = By changing the speed of shutter we can control the light entering into the lens which can control the brightness of picture
d) Angle of mirror : by adjusting the angle of mirror we can set the orientation of the image that is formed
Answer:
option (A) is correct
Explanation:
To bring the object in focus, you can change the distance between the film and the lens by moving the lens towards or away from the film.
As the lens is used to click the pictures of objects which are placed at different distances from the camera.
By using the lens formula
1 / f = 1 / v - 1 / u
Where, f is the focal length of the lens, u be the distance between lens and the object and v be the distance between image and the lens.
We can say that f is constant and u is constant so, we have to change the value of v that means the distance between the lens and the film to focus the images of the objects on the film.
Answers
Answers
Answer:
Work being done on the object = 766.04J
Explanation:
Work done by a force is calculated by finding dot product of force and displacement.
W = F . s
F = 25 N
s = 50 m
θ = 40.0°
W = F . s = Fs cosθ = 25 x 40 x cos 40 = 766.04J
Work being done on the object = 766.04J
Answers
Answer:
0.20kg-m^2
Explanation:
Let the linear velocity of the rope(=of pulley) is v m/s
Using kinematic equation
=> v = u + at
=>v = 0 + 4.9a
=>v = 4.9a ------------ eq1
By v^2 = u^2 + 2as
=>v^2 = 0 + 2 x v/4.9 x 1.2
=>4.9v^2 - 2.4v = 0
=>v(4.9v - 2.4) = 0
=>v = 2.4/4.9 = 0.49 m/s
Thus by v = r x omega
=>omega = v/r = 0.49/0.02 = 24.49 rad/sec
BY W = F x s = 50 x 1.2 = 60 J
=>KE(rotational) = W = 1/2 x I x omega^2
=>60 = 1/2 x I x (24.49)^2
=>I = 0.20 kg-m^2
decreases
stays the same
disappears
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Answer: Increases.
Explanation:
Warning siren is generally used to make people alert of danger. Danger can be anything associated with the health and hazard.
Warning siren can be due to tsunami, earthquake, fire, flood, et cetera. The pitch of siren is low when a person is afar from the siren.
As the person moves close to the siren, the pitch of siren increases.
Answer:
As you move toward the siren the pitch should get louder
Explanation:
in scientific notation, how many micrograms make 1 kg
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Please give brainliest