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Mice21 [21]
3 years ago
7

Select the correct definition for each of the following terms:

Physics
1 answer:
777dan777 [17]3 years ago
6 0

Answer:

1)A

2)B

3)C

4) D

5) C

Explanation:

1)

System is an isolation of matter that has been chosen out of the universe and studied.

2)

Surroundings are everything outside the system that interacts with the matter within the system externally

3)

Thermal energy is associated with constant random motion of atoms and molecules associated with Temperature.

4)

Chemical energy is the energy stored in the bonds between the atoms and molecules. Breaking and making of these bonds lead to releasing and absorbing of energy to surroundings.

5)

Kinetic Energy is the energy associated with the motion of the particles.

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Paraffin wax is used to make candles<br>true or false<br>​
tangare [24]

Answer:

true

Explanation:

PLS MAKE ME AS BRAINLIST

7 0
3 years ago
How many turns are needed in a solenoid of radius 10 cm and length 20 cm for its self-inductance to be 6.0 H?
MA_775_DIABLO [31]

Answer:

B

Explanation:

5 0
3 years ago
Weathering of rocks can occur in many ways. In the western United States, strong winds can erode huge rock formations by blowing
stepan [7]

Answer: physical or mechanical weathering

Explanation:

Mechanical weathering which is also referred to as the physical weathering occurs when a rock is broken down into smaller pieces. In this case, there will be a physical change of the rock but its composition will not change.

Some examples include ice freezing and expansion of the cracks in the rock, Smstrong winds that carrycpieces of sand which then sandblast surfaces, moving water which causes abrasion etc.

3 0
2 years ago
Which of the following would decrease the magnetic field around a wire?
shusha [124]
The correct answer is
<span>A. decreasing the current

In fact, the magnetic field produced by a current carrying wire is given by
</span>B(r) =  \frac{\mu_0 I}{2 \pi r}
<span>where
</span>\mu_0 is the vacuum permeability
<span>I is the current in the wire
r is the distance from the wire at which the field is calculated

We see from the formula that the intensity of the field, B, is directly proportional to the current I, so if the current decreases, the magnetic field strength B decreases as well.</span>
4 0
3 years ago
A department store sells an ""astronomical telescope"" with an objective lens of 30 cm focal length and an eyepiece lens of foca
Yuliya22 [10]

Answer:

The magnifying power of this telescope is (-60).

Explanation:

Given that,

The focal length of the objective lens of an astronomical telescope, f_o=30\ cm

The focal length of the eyepiece lens of an astronomical telescope, f_e=5\ mm=0.5\ cm

To find,

The magnifying power of this telescope.

Solution,

The ratio of focal length of the objective lens to the focal length of the eyepiece lens is called magnifying of the lens. It is given by :

m=\dfrac{-f_o}{f_e}

m=\dfrac{-30}{0.5}

m = -60

So, the magnifying power of this telescope is 60. Therefore, this is the required solution.

7 0
3 years ago
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