Answer:
15 because 5×5×5 is the same thing as 5×3 which equals to 15
After the second car starts out,
D = 30 + 110 H
360 = 30 + 110 H
330 = 110 H
H = 330/110
H = 3 hours after the second car leaves.
That's 3.5 hours after the first car leaves.
Answer: Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form. An internal combustion engine provides a good example of the ease with which gases can be compressed.
Explanation:
Answer:
(b) a hydrogen atom
Explanation:
Wavelength is inversely proportional to energy. So we have to find the system for which the second photon has smaller energy than the first one.
For the harmonic oscillator, the energy level spacing remains the same as the quantum number increases.
For the hydrogen atom, the energy level spacing decreases as the quantum number increases.
For the particle in a box, the energy level spacing increases as the quantum number increases.
An example is a car going 100 mph
