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2 years ago

Someone help please i need to finish this

Physics

1 answer:

Tom [10]2 years ago

6 0

Answer:

4th answer

Explanation:

The gradient of a distance-time graph gives the speed.

gradient = distance / time = speed

Here, the gradient is a constant till 30s. So it has travelled at a constant speed. It means it had not accelarated till 30s. and has stopped moving at 30s.

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Write a question you would like to see on a quiz to calculate NET FORCE.

Pie

Answer:

How do you find the net force?

Explanation:

i think this is want you asked for?

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2 years ago

What could you include to give a sense of scale in a photograph of a mountain?

Shalnov [3]

Lighting gives a sense of scale (The sky)

6 0

3 years ago

What is the purpose of a voltage source?

ivann1987 [24]

Answer:

B. It increases the potential energy of electrical charges to produce a current.

Explanation:

Battery is a source of constant potential difference

When a charge is passed through the battery then its potential energy changes by

$\Delta U = Q\Delta V$

here we know that

$\Delta V$ = potential difference of battery

so as the charge is passing through the terminals of battery its potential energy is changed by above value.

Now by the conservation of energy principle we know that this change in potential energy will convert into kinetic energy of charge and then the flow of charge will produce current in the circuit.

So battery is used to maintain a constant current in the circuit by giving potential energy to the charge.

4 0

3 years ago

Find the current if R is 470 ohms and the volts is 3.5V

boyakko [2]

Answer:

I = 0.00744 A (Amps)

Explanation:

Hi there !

Ohm's law formula

I = V/R

I = 3.5V/470Ω

I = 0.00744 A

Good luck !

8 0

3 years ago

Bola bermassa 200 gram dilempar

ikadub [295]

Answer:

0.4

Explanation:

$\frac{1}{2} mv ^{2}$

kinetic energy formula , potential energy is not considered

0.5×0.2×2×2

8 0

3 years ago