Answer:
The answer is B
Explanation:
The line spectrum shows distinct light different energies and wavelengths
Blue light can knock electrons off a plate, but red light can't
Answer:
56 kg
Explanation:
The change in potential energy of the man is given by:

where
m is the man's mass
g is the gravitational acceleration
is the change in height of the man
In this problem, we have:
is the gain in potential energy
g = 9.8 m/s^2 is the gravitational acceleration
is the change in height
Re-arranging the equation and substituting the numbers, we find the mass:

Breaking down sugar (glucose) is a chemical change. Sugar is a compound that can be broken down.