a train travels 81 kilometers in 2 hours and then 88 kilometers in 2 hours what is its average speed

When two or more different capacitors are connected in series across a potential source, which of the following statement must be true? a. The capacitor with the largest capacitance has the most charge. b.

Why can't plants and animals use the nitrogen directly from the atmosphere? A:There is not enough of it in the air. B:Nitrogen gas contains the element in an inert, unusable state. C:They do use it directly from the atmosphere.

A school bus takes 0.53 hours to reach the school from your house. If the average speed of the bus is 19km/h, what is the displacement of the bus during the trip?

At 8:00 AM you leave home and walk. 5km to your friends house. at 11:30AM you return home, then tavel by car to the mall, which is 10km away, and arrive at 11:45AM. what is the total distance traveled

Which is not an example of a scalar? a. 2t/s b. 3kg c. 6.2m north d. - 100c

Bus A and Bus B leave school on a field trip when a stopwatch reads zero. Bus A travels at a constant 50 km/h, and Bus B travels at a constant 75 km/h. How far are the two buses from school when the stopwatch reads 1.5 h?. a ... Bus A is 76.

When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum. Why does this redshift occur?

Object A has a length of 3 cm, a width of 10 cm, and a height of 2 cm. Object B is dropped into a graduated cylinder. It displaces 60 mL of water. The volume of object A is:

Is the following sentence true or false? Some information about an object or process may be missing from a model.

If V is a velocity, l a length, and v a fluid property having dimensions of L2T-1, which of the following combinations are qualitatively dimensionless (show work for a through d) : (a) V l v (b) Vl/v (c) V2v (d) V / (l v)