Which astronomer proved that the planets of our solar system move in elliptical orbits? A. Kepler B. Copernicus C. Ptolemy D. Galileo

Copernicus patterned his concept of the solar system after that of

What causes a high frequency of sound

What condition is necessary for a moving object to produce a shockwave?

When two plates pull apart from one another, what is likely to happen there? A. subduction B. volcanic activity C. mountain building D. transform movement

Interactions between biosphere and hydrosphere

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?