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Murljashka [212]
3 years ago
12

Which of the following is a TRUE statement?

Physics
1 answer:
pshichka [43]3 years ago
5 0

Answer:

e. All of these statements are false.

Explanation:

As we know that heat transfer take place from high temperature to low temperature.

It is possible to convert all work into heat but it is not possible to convert all heat in to work some heat will be reject to the surrounding.

The first law of thermodynamics is the energy conservation law.

Second law of thermodynamics  states that it is impossible to construct a device which convert all energy into work without rejecting the heat to the surrounding.

By using heat pump ,heat can transfer from cooler body to the hotter body.

Therefore all the answer is False.

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You need to produce a set of cylindrical copper wire 3.5 m long that will have a
vazorg [7]

Solution :

We know, resistance is given by :

R = \dfrac{\rho l}{A}

A = \dfrac{\rho l }{R}\\\\A = \dfrac{1.72\times 10^{-8} \times 3.5 }{0.125}\\\\A = 4.816 \times 10^{-7} \ m^2

Now, we know mass of wire is given by :

Mass = Density \times Volume\\\\\M = 8.9 \times 10^3 \times 4.816 \times 10^{-7} \times 3.5 kg\\\\M = 0.01500\ kg\\\\M = 15.00\ gram

Hence, this is the required solution.

8 0
3 years ago
Which material rises from cracks in oceanic crust?
disa [49]

Answer:

trenchs and magma

Explanation:

7 0
3 years ago
Read 2 more answers
if the moon were somehow knocked out of orbit and flew off into outer space, what are the possible effects on the earth?
Anarel [89]
<h2>Answers:</h2>

<u>The possible effects on the earth will be</u><u> 1) No light during night 2) No tides</u>

<h2>Explanation:</h2>

As we know that tides are caused by the differential gravitational force on the equatorial regions by the moon. So if the Moon escapes from Earth, the main effect would be the lack of tides on Earth The region closer to the Moon experiences more gravitational force than the region on Earth away from the Moon. Other effects will be no more Moon to light up the night sky and no more solar eclipses.

5 0
3 years ago
A dolphin in seawater at a temperature of 25°C emits a sound wave directed toward the ocean floor 154 m below. How much time pas
Cerrena [4.2K]

Answer:

0.2s

Explanation:

SO for the dolphin to hear its echo, the sound wave must travel a distance twice as much as the displacement between the dolphin and the ocean floor. So d = 154 * 2 = 308 m

Since the speed of sound in ocean floor is v = 1533m/s we can find out the time by dividing the distance d by the speed of sound

t = d / v = 308 / 1533 = 0.2s

7 0
3 years ago
In which approximate direction is the warm front in the upper left of the weather map moving?
Pie

Answer:

East

Explanation:

I did the test

8 0
3 years ago
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