Answer:
Q = 0.75 g x 0.897 J/g•°C x 22°C
Explanation:
The amount of heat needed to raise the temperature of a substance is given by the equation
where
m is the mass of the substance
C is the specific heat capacity
is the increase in temperature of the substance
In this problem, the mass of the aluminium is m=0.75 g. The specific heat of aluminium is C=0.897 J/g•°C, while the increase in temperature is
So, the equation becomes
Q = 0.75 g x 0.897 J/g•°C x 22°C
Answer:
Explanation:
k = Coulomb constant = 
r = Distance between charges = 2 cm
The electric force is given by
Also
The sum of the force is given by
Thus 
.
The negative sign is because the force points downward which is taken as negative
Answer:
No
Explanation:
Sorry hun, I'm a lesbian lol
Answer:
Friction is a resistive force to motion. When two bodies move against each other some of the kinetic energy is converted to heat energy due to friction. This reduces the total kinetic energy in the system.
Explanation:
