A flagpole is a simple device on which a flag can be raised or lowered. Which simple machine is usually part of a flag pole?

A) lever

B) wedge

C) pulley

D) inclined plane

What is the energy (in joules) of an ultraviolet photon with wavelength 150 nm what is its frequency?

How much energy is needed to change the temperature of 50.0 g of water at 15.0 degrees?

What are advantages and disadvantages of breakwater

A 12.0 V battery is connected to two resistors in series: R1 = 12.00 , R2 = 4.00 .

A car travels from Boston to Hartford in 4 hours. The two cities are 240 kilometers apart. What was the average speed of the car during the trip? A. 4 km/hour B. 36 km/hour C. 960 km/hour D. 60 km/hour

a minibus drives 238 miles with a constant speed of 84 mph and another 80 miles with a constant speed of 60 mph. how much time in total does it take to travel these distance?

If the volume of a container increases, then the pressure will: A. first increase and then decrease. B. increase. C. stay the same. D. decrease.

How does the theory of natural selection explain the diversity of life?

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?

Which statement would be a valid argument in favor of using nuclear power? There are few negative impacts from mining the fuel. Reactors are safe from natural disasters. There are little to no waste products from fission.