Hello Again! I think the Answer might be 220 m! ( 1/2) ( 21 m/s + 0 m/s) (21 s) = 220 m
Answer:
70 g
Explanation:
ice at zero degree will melt and cool down water from 20 degree to 5 degree
heat gained by ice in melting
= mass x heat of fusion
= m x 333.7 x 10³ J
Heat gained by water at zero to water at 5 degree
= mass x specific heat x rise in temperature
= m x 4.18 x 10³ x 5
Total heat gained
= m x 333.7 x 10³ +m x 4.18 x 10³ x 5
= 354.6 x 10³ m J
mass of water = .4 x 1
= .4 kg
heat lost by hot water at 20 degree to 5 degree
= .4 x 4.18 x 10³ x ( 20-5 )
=25.08 X 10³ J
Heat lost = heat gained
354.6 x 10³ m = 25.08 X 10³
m = 25.08 / 354.6
= .070 kg
70 g
b )
Let the water required be m kg
heat gained by water
= m x 4.18 x 10³ x 15
m x 4.18 x 10³ x 15 = 25.08 X 10³
m = 25.08 / (4.18 x 15)
= .4 kg
= 400 gm
=
The northern circumpolar constellations you’ll find are Ursa Major, Ursa Minor, Perseus, Lynx, Draco, Cepheus, Cassiopeia, Camelopardalis and Auriga. Southern circumpolar constellations include Phoenix, Grus, Tucana, Eridanus, Hydrus, Lupus, Cruz, Centaurus and Carina, among others.
Answer:
4.4857 seconds
No
Explanation:
L = Length of the pendulum = 5 m
g = Acceleration due to gravity = 9.81 m/s²
Time period is given by
The optimum time interval in between the pushes is 4.4857 seconds
It can be seen that the mass of the child is not used in the formula and hence changing the mass would not result in a different time period.
The length of the pendulum and the acceleration of gravity of the planet determines the time period.