About how many NEO's enter Earth's atmosphere each year?

A force of 1 N accelerates 1-kg box at the rate of 1 m/s2. The acceleration of a 2-kg box by a net force of 2 N is

A) half as much. B) twice as much. C) the same. D) none of the above

Light of frequency 6.00 × 1014 Hz illuminates a soap film (n = 1.33 ) having air on both sides of it. When viewing the film by reflected light,

what is the minimum thickness of the film that will give an interference maximum when the light is incident normally on it? (c = 3.00 × 108 m/s) A) 24.0 nm B) 94.0 nm C) 188 nm D) 279 nm E) 376 nm

How many joules of energy are used by a 2.0 hp motor that runs for 1.0 hr?

What will be an ideal response?

A 20-? resistor and a 30-? resistor are wired in parallel and connected to a 9.0-V battery

a. How much current is drawn from the battery? b. How much power is dissipated in the circuit?