4. Ben Rushin is waiting at a stoplight in his 1500 kg car. When it finally turns green, Ben accelerated from rest at a rate of a 6.0 m/s2 for a time of 4.0 seconds.
a. What is the weight of Ben's Car?
b. How fast is Ben going after 4.0 seconds?
c. How much force is exerted by the car to accelerate of that rate?

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.

In a star, nuclear fusion occurs in the a. photosphere. b. corona. c. radiative zone. d. core.