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Q 1/30
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What is the unit of measurement for both kinetic and potential energy?
30
joules
watts
amperes
newtons
Q 2/30
Score 0
A 2 kg object is moving at a speed of 3 m/s. What is its kinetic energy?
30
6 J
9 J
18 J
12 J
30 questions
Q.
What is the unit of measurement for both kinetic and potential energy?
1
30 sec
Q.
A 2 kg object is moving at a speed of 3 m/s. What is its kinetic energy?
2
30 sec
Q.
A 5 kg object is held 10 meters above the ground. What is its potential energy relative to the ground?
3
30 sec
Q.
When a person eats a piece of food, what type of energy transformation takes place in their body?
4
30 sec
Q.
What type of energy transformation occurs in a battery-powered flashlight?
5
30 sec
Q.
Which type of heat transfer occurs in fluids such as water and air?
6
30 sec
Q.
Which type of heat transfer is responsible for the warmth you feel when sitting near a campfire?
7
30 sec
Q.
Which substance has a higher specific heat: water or aluminum?
8
30 sec
Q.
If 500 grams of water is heated and its temperature increases by 5°C, how much heat energy has been absorbed?
9
30 sec
Q.
Which statement best describes specific heat?
10
30 sec
Q.
Which component is responsible for converting nuclear energy into heat in a nuclear reactor?
11
30 sec
Q.
What is the term used to describe the splitting of a heavy atomic nucleus into two or more lighter nuclei?
12
30 sec
Q.
Which element is commonly used as fuel in nuclear reactors?
13
30 sec
Q.
What is the name of the reaction that occurs in the sun and other stars, where hydrogen atoms combine to form helium?
14
30 sec
Q.
Which type of nuclear decay involves the conversion of a neutron into a proton and the emission of an electron?
15
30 sec
Q.
What is the process where a nucleus releases energy by emitting electromagnetic radiation?
16
30 sec
Q.
What is the process by which an unstable nucleus spontaneously emits energy in the form of particles or electromagnetic radiation?
17
30 sec
Q.
Which type of radiation can be stopped by a piece of paper or human skin?
18
30 sec
Q.
What is the SI unit of electric potential difference?
19
30 sec
Q.
What is the SI unit of electric current?
20
30 sec
Q.
What is the phenomenon where an electric current is induced in a conductor by a changing magnetic field?
21
30 sec
Q.
Which device is used to measure electric current?
22
30 sec
Q.
According to Ohm's Law, what is the resistance (in ohms) of a circuit if the voltage across it is 10 volts and the current flowing through it is 2 amperes?
23
30 sec
Q.
If the resistance of an electrical circuit is 4 ohms and the current flowing through it is 3 amperes, what is the voltage across the circuit according to Ohm's Law?
24
30 sec
Q.
If 150 grams of water is heated from 22°C to 82°C, and the specific heat of water is 4.18 J/g°C, how much heat is needed?
25
30 sec
Q.
Which electromagnetic wave has the shortest wavelength?
26
30 sec
Q.
What happens to the strength of an electromagnetic field as the distance from the source increases?
27
30 sec
Q.
What does an electromagnet consist of?
28
30 sec
Q.
What happens to the strength of an electromagnet when the number of coils in the wire increases?
29
30 sec
Q.
What is the main difference between an electromagnet and a permanent magnet?
