if a distant star is 20 light years away how long wil it take us to travel there moving at the speed of light?

A student generates water waves in a pool of water. In order to increase the energy carried by the waves, the student should generate waves with a (1) greater amplitude (2) higher frequency (3) greater wavelength (4) longer period

Is carbon dioxide a fluid

What is the primary purpose of an astronomical telescope?

A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35° incline that is 7.0 m long. (a) Calculate the linear speed of the center of the sphere when it reaches the bottom of the incline.

Two tiny metal spheres A and B, mass mA $ 5.00 g and mB $ 10.0 g, have equal positive charge q $ 5.00 mC. The spheres are connected by a massless nonconducting string of length d $ 1.00 m, which is much greater than the radii of the spheres.

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach

Exoplanets (planets outside our solar system) are an active area of modern research. Suppose you read an article stating that there is a newly discovered planetary system with three planets.

A car with a mass 1200 kg accelerates at 1.89 m/s2. What is the total force exerted by the car on the road (answer in N to two decimal places) ?

How Long will it take a plane flying north from Miami to reach New York City 1800 km away if the average velocity of the plane is 940 km/h