Given:
Water, 2 kilograms
T1 = 20 degrees Celsius, T2 = 100
degrees Celsius.
Required:
Heat produced
Solution:
Q (heat) = nRT = nR(T2 = T1)
Q (heat) = 2 kilograms (4.184 kiloJoules
per kilogram Celsius) (100 degrees Celsius – 20 degrees Celsius)
<u>Q (heat) = 669.42 Joules
</u>This is the amount of heat
produced in boiling 2 kg of water.
Answer:
yes it is allowed to win
Explanation:
a velocity used to measure to take a distance travelled my any thing
Answer:
v = 16.58 m/s
Explanation:
Given that,
Mass of a bird, m = 1.6 kg
Kinetic energy of the bird, K = 220 J
We need to find the speed of the bird. The formula for the kinetic energy is given by :
Where
v is the speed of the bird
So,
Put all the values,
So, the speed of the bird is equal to 16.58 m/s.
Answer:
D
Explanation:
They looked at her hand and made a formal conclusion from that
Answer:
B.
Explanation:
The ability of a substance to conduct electricity depends on the free electrons it has.
An electric insulator is a material in which electrons have little freedom to move. For this reason, they are bad conductors of electricity and are used in producing insulating materials. They however contain electron.
Conductors on the other hand are materials whose electrons are very free to move. Hence they are very good conductors of electricity