Which of the following lenses has at least one plane surface?

a. double-convex lens

b. converging concavo-convex lens

c. double-concave lens

d. plano-convex lens

If a substance cannot be physically separated into component parts, it is likely to be

It takes 9 seconds for a 10 newton force to move an object 4 meters to the right. What are the direction and magnitude of this force? A. The direction is to the right. The magnitude is 9 seconds. B. The direction is 4 meters.

Is water flowing down hill stored energy

How many stars are on the us flag?

What ion is most closely associated with bases?

I need this answered quickly. is the branch of science for naming and classifying organisms based on their natural relationships? A-physics B-taxonomy C-genetics D-biology

For a fixed amount of gas, if the absolute temperature of the gas is doubled, what happens to the pressure of the gas?

A 500-kilogram sports car accelerates uni- formly from rest, reaching a speed of 30 me- ters per second in 6 seconds. What distance has the car traveled during the 6 seconds?

What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?