Questions from Physics

Q: The driver of a car slams on the brakes when he sees

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.70 m/s2 for 4.45 s, making straight skid marks 63.5 m long, all the way t...

Q: The driver of a car slams on the brakes when he sees

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.80 m/s2 for 4.40 s, making straight skid marks 63.2 m long, all the way t...

Q: The driver of a car slams on the brakes when he sees

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.35 m/s2 for 4.00 s, making straight skid marks 61.5 m long, all the way t...

Q: A 100W incandescent light bulb is plugged into a 120V/60Hz

A 100W incandescent light bulb is plugged into a 120V/60Hz outlet. What is the resistance of the light bulb filament? What is the peak current of the bulb?

Q: You have a 50W light bulb and a 100W light bulb.

You have a 50W light bulb and a 100W light bulb. These power ratings are for an applied voltage of 100 volts. Prove that the 50W bulb will be brighter than the 100W bulb if they are connected in serie...

Q: Suppose you have a spring with a spring constant of 75.

Suppose you have a spring with a spring constant of 75.0 N/m, and you attach a 0.65 kg mass to it. How fast is the mass traveling when it reaches the new equilibrium position?

Q: A light bulb of 100W emits green light (wavelength of 500

A light bulb of 100W emits green light (wavelength of 500 nm photons are emitted from the light bulb in a second?

Q: 2a. It takes 4 old fashioned 100W filament light bulbs to

2a. It takes 4 old fashioned 100W filament light bulbs to light up a given room. If that room is lit up 14 hours per day, and electricity costs $0.15/kWh, how much does it cost to light up that room f...

Q: A light bulb of 100W emits green light (wavelength of 500

A light bulb of 100W emits green light (wavelength of 500 nm). How many photons are emitted from the light bulb in a second?

Q: Two light bulbs, one rated 50 W and a second rated

Two light bulbs, one rated 50 W and a second rated 100 W are both supposed to be connected to a 110 V source of emf. Which of the following is true? a. The 50W bulb has twice the resistance as the 100...