How many calories are needed to raise the temperature of 25 grams of water form 50°C to 70°C. The specific heat of water is
1cal/g °C

500 cal

Explanation:

m=25g,c=1cal/g, change in temperature=70-50,20 degree Celsius Q=?

using formula Q=mxcx change in theta

Q=25x1x20

Q=500cal

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.