Credit cards give you rewards for using it. If you're responsible and pay when your money is due, you get rewards for using it with no cons. If you have a debit card, you can't not pay up so you don't have to give a loan (you do have to take out a loan with credit cards and pay huge interest) but you get no rewards (e.g. 3% cash back on gas)
Answer:
the density of the mercury is 19.85 cm^3
Explanation:
Given that
The density of the mercury is 13.6g\cm^3
And, the mass of the mercury is 270
We need to determine the volume of the mercury
As we know that
density = mass ÷ volume
13.6 g/cm3 = 270 g/ volume
volume = (270 g) ÷ (13.6 g/cm3)
= 19.85 cm^3
Hence, the density of the mercury is 19.85 cm^3
I'm pretty sure that the answer is 56.4 cm. I hope this helps.
Answer:
The minimum distance moved by mirror is 125 nm
Explanation:
Given:
Wavelength of light m
Here given in question, spot of constructive interference change to a destructive interference.
Hence minimum distance moved by one of mirror is given by,
Where distance moved by mirror
Therefore, the minimum distance moved by mirror is 125 nm
The bowling ball starts with a certain amount of potential energy. It gets this energy because someone had to lift it up to hang it. Bowling balls are heavy and you have to do work to get it up in the air. Whenever we do work on something, we are giving it energy. When you let go of the ball, it swings downward like a pendulum. As it starts swinging, the energy changes from potential energy to kinetic, or moving, energy. The total amount of energy, moving plus stored, stays the same; it only changes form. When the ball swings back to where it started, the energy changes back to potential energy. Since the total energy has to stay constant, the kinetic energy of the ball must be zero and the ball must stop moving. It can’t hit you