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yaroslaw [1]
3 years ago
5

What are cosmic rays mostly made up of?

Physics
1 answer:
vivado [14]3 years ago
5 0
Cosmic rays are made up of 80% of protons!

They can only enter on the poles of earth because of Earth's magnetic field and cosmic rays's charge that's why we see Northern lights on the poles!
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Three resistances 2 ohm ,3ohm and 5 ohm are connected in parallel and a
hammer [34]

The potential difference across 3 Ohm resistor is 20V.

The resistors are connected in parallel which means all the three resistances have a fully potential difference of 20V.

7 0
3 years ago
What is the change in internal energy of the system (∆U) in a process in which 10 kJ of heat energy is absorbed by the system an
Trava [24]

Answer:

Explanation:

According to first law of thermodynamics:

∆U= q + w

= 10kj+(-70kJ)

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, w = + 70 kJ

(work done on the system is positive)

q = -10kJ ( heat is given out, so negative)

∆U = -10 + (+70) = +60 kJ

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3 years ago
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ziro4ka [17]
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bearhunter [10]
Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance.<span> </span><span>It has standard units of kg/m^3 or g/mL. So, the best answer is option C.</span>

4 0
3 years ago
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Also you have to make sure the distance between the two hands are equal as you want an accurate result.

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