Hope this helps.
A.
Hydroelectric is renewable
Biomass is renewable
Solar is renewable
Answer:
Raising its temperature by
Explanation:
The specific heat capacity of a substance is defined as the amount of energy needed to raise the temperature of 1 kg of a substance by .
The specific heat capacity of a substance essentially tells us how much energy is needed to heat the substance: the larger it is, the more energy is needed. The amount of energy needed to increase the temperature of a substance is given by
where
m is the mass of the substance
Cs is the specific heat capacity
is the temperature variation of the substance
Answer:
Apparent frequency increases for Bob and decreases for Jill.
Explanation:
Doppler effect refers to the apparent change in frequency when there is relative motion between source and the listener. When the source and listener move closer, the apparent frequency heard by the listener increases. And when the source and listener move away from each other, the apparent frequency heard by the listener decreases.
Thus, when the emergency vehicle approaches Bob, the apparent frequency of the siren increases. It moves away from Jill, the apparent frequency heard by the Jill decreases.
Answer:
88.89 cm
Explanation:
We are given that
Distance between bulb and wall=4 m=
1 m=100 cm
Let h be the height of object
Object distance=-u
Image distance= v
Height of object=2h
Magnification=
Lens formula