Hubble law how did astronomers gather the information needed to establish the law?

An object is launched at 20 m/s from a height of 65 m. The equation for the height (h) in terms of time (t) is given by h (t) = - 4.9t² + 20t + 65. What is the object's maximum height? the numeric answer only, rounded to the nearest meter.

The moon has it the greatest effect on earths what?

an electric motor lifts an elevator that weighs 1200N a distance of 9m in 15s, what is the power of the motor in watts?

When continental plates hit continental plates?

Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

Explain why it's important that the alveoli is only 1 cell thick

A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam.

Which law is being demonstrated when a swimmer moves forward through the water?

A camcorder has a power rating of 16 watts. If the output voltage from its battery is 7 volts, what current does it use?

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.