Imagine the hydrogen atoms in one of Hubble's distant stars emitting a photon of light at a wavelength of 410.17 nm. If that particular photon were headed directly TOWARD Earth, how much CLOSER to...

Spider laid her large plane web on a Cartesian co-ordinate system.She located 2 identical small speakers,at (X =-3m, Y=8m), (X=3m, Y=-8m).She drove both speakers with the same electrical signal,they...

Assume that the car is moving: a) away from the listenEd. Ans.413 Hz b) toward the listener. Ans.494 Hz   ps. How can I get the answer? Thx!

Jane won, crossing the finish line 5m ahead of Nick. Jane was a good sport, and agreed to start a second race 5m behind the start line, so she would have to run 105m while Nick ran 100m. assuming...

She plays the same note again but blows harder the second time. What characteristics of the sound wave will change as a result?

a) How far is the water from the top of the tube if the temperatur eis 21*C? ans. (17cm) b) If the tube is 1m long, at what points will other resonances will occur?  pans. (50cm,...

A lead ball is dropped into a lake from a diving board 5m above the water . It hits the water with a certain velocity and then sink with constant velocity in bottom . It reaches the bottom 5 second...

solve Resistance on the flywheel = 25 N Cranking speed = 60 rpm Distance traveled per revolution = 6 meters

A jet travels 3860mi against a jetstream in 5 hours and 4610mi with the jetstream in the same amount of time. What is the rate of the jet in still air and what is the...

A body of mass 2kg is placed on another body of mass 4kg which is on top of a table. coefficient of friction between the body 2kg and 4kg is 0.2 and that of body 4kg and  surface of...

A car moving at 40km/h is to be stopped by applying brakes in the next 4.0 m. if the car weight 2000kg what average force must be applied on it? Ans : Since car moving at speed 40km/h with...

The sum , difference and cross product of two vector A and B are mutually perpendicular if    A and B are perpendicular to each other and |A| = |B|    This...