Plz help it's physics really easy

Answers

Answer 1

Answer:

Technically, there is not enough information to tell, because in your picture, you cut off the last word in the question.

If the last word in the question is "acceleration", then "C" is the correct choice.

If some other word is the last one in the question, then it has to be "D".

Answer 2

Answer:

Answer:

D. there is not enough information to tell

Explanation:

I have already read this in grade five

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What is the purpose of a voltage source?A. It removes insulators in a circuit so electrical charges flow freely.

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

C. It increases the kinetic energy of electrical charges to produce a static discharge.

D. It transfers electrons through induction so they generate electrical energy.

Answers

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.

A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after being released?

Answers

(M G H)=(0.5 x 9.8 x 10) = 49 joules.

Contrast generators and electric motors.

Answers

Answer:

A generator produces electricity when a conducting wire is rotated between magnetic field. Mechanical energy is converted to electrical energy. Fleming's right hand rule is used.

An electric motor does mechanical work using electrical energy. A current carrying coil is placed in magnetic field. A torque is exerted on the coil and it rotates. Electrical energy is converted to mechanical energy. Fleming's left hand rule is used.

generators take mechanical and output energy. electric motors take the input of electricity.

A screenshot of the question is attached. Gravity=10N/Kg

Answers

Answer:

1.8 MJ

Explanation:

PE = mgh

PE = (1500 kg) (3.7 N/kg) (324 m)

PE = 1,798,200 J

PE = 1.8 MJ

A 120-V power supply connected to a 30-ohm resistor will produce
amps of current

Answers

Answer:

4 amps

Explanation: ohms law

Which one of the following temperatures is equal to 5°C?

Answers

5°C = 41°F = 278 K .

Answer:

278 K

Explanation:

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Arun places a beaker of water on a hotplate and turns the hotplate on. The temperature in the room is 25 ºC. After the water heats to 75 ºC, she adds pieces of ice to the beaker. Which mode of transfer of heat energy occurs in the water during this experiment? Justify your answer

Which of the following statements is true about "speed" and "acceleration"?A. When an object has acceleration, its velocity may increase or decrease gradually. B. When the acceleration of the object is zero, its velocity is also zero. C. The direction of object velocity is not necessarily the same as that of acceleration. D. When the object is vertically thrown up to the highest point, the speed and acceleration are zero. E. When the object is free-falling, the displacement and acceleration direction are the same.