Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The heating element in an electric kettle is usually located near the bottom of the kettle because
water is a good conductor of heat
heat can be more quickly radiated to all parts of the water
no heat can be lost to the surroundings
the convectional currents which are set up can carry heat to all parts of the water
the molecules of the heating element can carry heat to all parts of the water.
Correct answer is D
No explanation has been provided for this answer.
336,000J
672,000J
8,704,000J
9,040,000J
9,376,000J
Correct answer is C
\(Q_{s} - Q_{w} = (4 \times 2260000) - (4 \times 4200 \times (100 - 80))\)
= \(9040000 - 336000\)
= \(8,704,000 J\)
80 Jkg-1K-1
320Jkg-1K-1
500Jkg-1K-1
1200J kg-1K-1
2000J kg-1K-1.
Correct answer is B
No explanation has been provided for this answer.
1.0x105Nm-2
2.0X105Nm-2
3.0x105Nm-2
4.0 x105Nm-2
5.0 x105Nm-2
Correct answer is D
No explanation has been provided for this answer.
1:4
1:2
2:1
4:1
6:1
Correct answer is B
No explanation has been provided for this answer.