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Arada [10]
4 years ago
6

Match the letters to the numbers for 30 points!

Physics
2 answers:
liq [111]4 years ago
7 0

-- 'Ca' (Calcium) is an element.
-- The proton has a positive charge.
-- Nuclear fusion results in the synthesis of atoms of new elements.
-- H₂O (water) is a chemical compound.
-- Nuclear fission is a decay of the nucleus.
-- The atomic number of an element is the number of protons
      in each atom of it.
-- I suppose you're using the Greek letter  <span>η  ('eta', not 'nu')
      to represent the neutron.
-- I suppose you're using ' e ' to represent the electron.
</span>
labwork [276]4 years ago
4 0
1-a
2-d
3-e
4-c
5-g
6-b
7-h
8-f
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A uniform electric field is directed parallel to the +y axis. If a positive test charge begins at the origin and moves upward al
lukranit [14]

Answer: option 1 : the electric potential will decrease with an increase in y

Explanation: The electric potential (V) is related to distance (in this case y) by the formulae below

V = kq/y

Where k = 1/4πε0

Where V = electric potential,

k = electric constant = 9×10^9,

y = distance of potential relative to a reference point, ε0 = permittivity of free space

q = magnitude of electronic charge = 1.609×10^-19 c

From the formulae, we can see that q and k are constants, only potential (V) and distance (y) are variables.

We have that

V = k/y

We see the potential(V) is inversely proportional to distance (y).

This implies that an increase in distance results to a decreasing potential and a decrease in distance results to an increase in potential.

This fact makes option 1 the correct answer

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4 years ago
What is the shape of a magnetic field about a current-carrying wire?
nikdorinn [45]
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The magnetic field around a straight<span> wire consists of </span>concentric <span>circles
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7 0
3 years ago
2. Grace drives her car 40 km in 75 minutes. What is her average speed in<br> kilometers per hour?
Agata [3.3K]

Answer:

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3 years ago
How much power does it take to lift 30.0 N 10.0 m high in 10.00 s?
Nadya [2.5K]

The power required is 30 Watt.

Let us recall that power is defined as the rate of doing work. Hence, we can write as follows;

Power = Work done/ time taken

Now;

work done =  Force × distance

Force = 30.0 N

Distance = 10.0 m

work done = 30.0 N × 10.0 m = 300 J

The power expended = 300 J/10.00 s = 30 Watt

Learn more: brainly.com/question/64224

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3 years ago
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3 years ago
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