Answer:
The gravitational force between two objects depends only on their masses.
i think sorry if its wrong!!
Explanation:
Answer:
159HZ A
Explanation:
frequency= speed/wavelength
frequency= 342/2.15=159HZ
B is true, however that is not a way in which conserving and recycling paper helps manage energy sources...
Heat required to raise the temperature of water is given as

here we have
m = 100 g = 0.100 kg
s = 4183 J/kg C

now we can use the above equation


so here it requires 20920 J heat to raise the temperature of 100 g water by 50 degree C