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Alexus [3.1K]
3 years ago
13

Develop a power point presentation to which you explain how convection works by using ocean water as an example. In your present

ation, give details about where the water is moving during convection and why it is moving. Describe how water temperature is measured, and how you would measure to show thermal energy transfer.
Physics
1 answer:
Ede4ka [16]3 years ago
4 0
I wonder what is going to change when you can be used for the day and the temperature changes to a substance that you have learned to eat and drink a lot more water and water you have a water.
You might be interested in
I need help with #10
kherson [118]
Conduction. Because they are connected as they tranfer energy
3 0
3 years ago
How much heat h1 is transferred to the skin by 25.0 g of steam onto the skin? the latent heat of vaporization for steam is l=2.2
elena-s [515]
The heat transferred by the steam to the skin is given by
Q=m L_v
where
m is the mass of the steam
L_v is the latent heat of vaporization.

In our problem, the mass of the steam is (converting into kg)
m=25.0 g=0.025 kg
while the latent heat of vaporization of the steam is
L_v = 2.256 \cdot 10^6 J/kg
Substituting into the previous formula, we find the heat transferred to the skin:
Q=m L_v = (0.025 kg)(2.256 \cdot 10^6 J/kg)=56400 J = 2.56 \cdot 10^4 J
8 0
3 years ago
The Doppler effect is the apparent change in frequency due to the movement of the source and the observer. This means an object
Alekssandra [29.7K]

Answer:

Doppler effect changes the wavelength of the light emitted, depending upon whether source is moving away or coming towards the observer(detector).

Explanation:

Doppler effect in light is actually a relativistic effect but somewhat similar to the one which happens in sound waves.

When the source is moving away from the detector, the wavelength of the light emitted from the source appears to be increased as seen by the detector, as a result the frequency decreases(we know that frequency of light= speed of light/wavelength of light. Here speed of light is constant and frequency of light is inversely proportional to its wavelength)

Due to this decrease in frequency the light emitted from the source appears more red, since red color is on low frequency side in the electromagnetic spectrum.

Similarly for the source moving towards the detector, the wavelength appears to be decreased, thereby resulting in increase in frequency and the source appears blue. The shift in frequency is known as doppler shift.

The shift in frequency when the source is moving away is known as redshift and the one where the source is moving towards detector is known as blueshift

4 0
3 years ago
A high-performance sports car can go from 0 to 100 mph in 5.8 s. (Assume the car travels in the positive direction. Indicate the
sasho [114]

Answer: a) 7.71 m/s², b) - 6.67 m/s²

Explanation: first thing to note is that

1 mile = 1609.34

1 hour = 3600s

Hence, 100mph to m/s = (100 × 1609.34)/3600 = 44.71 m/s

Initial velocity (u) = 0, final velocity (v) = 44.71 m/s, t = 5.8s, a = acceleration =?

By using newton's laws of motion

v = u + at

44.71 = 0 + a(5.8)

44.71 = 5.8a

a = 44.71/5.8

a = 7.71 m/s²

Question b)

The car is completing a stop which implies that the car is coming to rest, and when a car is coming to rest, the final velocity (v) is zero.

Hence u = 34 m/s, v = 0, a =?, t = 5.1 s

v = u + at

0 = 34 + a(5.1)

a(5.1) = - 34

a = - 34/5.1

a = - 6.67 m/s².

The negative sign beside the acceleration shows that the body is decelerating

7 0
2 years ago
Explain why cool rock material sinks when convection takes place in the mantle?
BaLLatris [955]
This is because its density increases. In a liquid, the density decreases, allowing it to stay on top of another substance. The liquid cools as it rises away from the core, and gets closer to the crust. The loss of temperature makes it more dense than the liquid.
8 0
3 years ago
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