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liq [111]
3 years ago
11

The Sun is the main source responsible for heating the surface of the Earth. Is this true or false? Give reasons to support your

position.
Physics
1 answer:
notsponge [240]3 years ago
3 0
Yes its true, because most energy is coming from the Sun. Other sources of energy on Earth are Earth internal energy and cosmic radiation but they infuluence much less the temperature of the surface of the Earth compared to the Sun.
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A certain superconducting magnet in the form of a solenoid of length 0.72 m can generate a magnetic field of 3.5 T in its core w
ira [324]

Answer:

55407

Explanation:

we have given that magnetic field B=3.5 T

current through the coil=90 A

Length of solenoid =0.72 m

we know the formula of magnetic field

B=\frac{\mu _0NI}{l}

so N=\frac{Bl}{\mu _0I}=\frac{3.5\times 0.72}{4\pi \times 10^{-6}\times 90}=55407.277=55407\ turns

so the number of turn in solenoid will be 55407

3 0
2 years ago
In which situation would an object weigh the LEAST? (assume all the objects have the same mass)
inessss [21]

Answer:

An object on the moon would weigh the LEAST among these. So correct answer is B.

Explanation:

  • Weight of an object on any place is given by:

W = Mass * Acceleration due to gravity(g)

  • It means when masses of different objects those are in different places are same, the weight of  those objects depends upon the 'g' of that particular place.
  • As we know, acceleration due to gravity on surface of moon (g') is 6 times weaker than the acceleration on surface of earth (g), which is due to the large M/R^2 of the earth than the moon.

i.e. g' = g/6 so W' = W/6

  • And in the space between the two, the object is weightless.
8 0
2 years ago
Read 2 more answers
Braddy connected the loose wire to the battery and created an electromagnet. He picked up 45 thumb tacks with his electromagnet,
Katarina [22]

Answer:

C) Use two batteries instead of one.

Explanation:

-Strength of an electromagnet depends on the electrical current which flows through the wires.

-Two batteries have a higher current than one and thus higher strength in the electromagnet.

3 0
3 years ago
According to the diagram, which color of visible light has the shortest wavelength?
Fynjy0 [20]

Answer:

Violet Light

Explanation:

On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum. It has all the colors of the rainbow.

6 0
3 years ago
Read 2 more answers
Where should an object be placed in front of a concave mirror’s principal axis to form an image that is real, inverted, larger t
malfutka [58]
<em> I believe the answer is letter C.</em>
8 0
2 years ago
Read 2 more answers
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