What is the approximate size of the smallest object on the earth that astronauts can resolve by eye when they are orbiting 250 km above the earth? assume λ = 500 nm and a pupil diameter of 5.00 mm?

A train traveled 280km in 3.5 hours. what was the average speed in m/s?

What two simple machines make up a screw?

1. If a 40 kg person is accelerating at 10 m/s2, then the force acting on him or her is 400 N A. true or B. false 2. How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2? A. 62 N B. 62 kg C. 120 N D. 120 kg 3.

A team of engineering students is testing their newly designed raft in the pool where the diving team practices. The raft must hold a 730 kg steel cube with edges of length 45.0 cm without sinking.

How many atoms are in 1.5 mol of Cu?

If you have a 90 V power source with a 30-Ω and 60-Ω resistor in series, what is the voltage drop over the 60-Ω resistor? 30 V 2 V 60 V 90 V

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object

An initially uncharged air-filled capacitor is connected to a 5.83 V charging source. As a result, 3.41*10-5 C of charge is transferred from one of the capacitor's plates to the other.

Which objects are inclined planes? Check all that apply. a nail a staircase a seesaw a wheelchair ramp a slide