How long have advances in astronomy been occurring? Only for the past few years

Only for the past decade

Only for the past century

For the past few centuries

All waves on the electromagnetic spectrum travel at the same speed in a vacuum. The speed of these waves in a vacuum is 3x108 m/s. As the wavelength of a wave doubles, how does the speed and frequency of the wave change?

The 94-lb force P is applied to the 220-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate.

What process is a method of heat transfer but does NOT contribute significantly to heating the surface or atmosphere of the earth? A) conduction B) convection C) insulation D) radiation

You and two of your friends go to the movies. Each ticket cost $7.50. You share the cost of the popcorn. If each person pays $9.05, how much was the popcorn?

Which alternative energy source would be expected to be the least dependent upon the weather? a. wind power b. solar power c. geothermal power d. none of the above

One step in the production of hydroelectric power involves

A pot is heated on a stove. The water begins to boil rabidly. Which explains why the water is boiling fast?

A galvanometer can be calibrated to read electric A) current B) Voltage C) either of these D) neither of these

Why do responsible consumers use credit and credit cards?

According to Ptolemy's model of the movement of celestial bodies, A. the sun is the center of the universe. B. the earth rotates around the moon. C. planets orbit in circular paths around the earth. D. the earth rotates around the sun.