What characteristics would an Earth-like planet need to have to support life?

What is the mass of a pure platinum disk with a volume of 113 cm3? the density of platinum is 21.4 g/cm3

A force is always needed to slow an object down. A True B false

If object weighs 30 n on the earth whatvis its mass

Obviously, we can make rockets to go very fast, but what is a reasonable top speed? assume that a rocket is fired from rest at a space station in deep space, where gravity is negligible. assume that c = 3.00 * 108 m/s.

Determine whether each of the statements below is true or false, and place it in the appropriate bin. Objects with equal speeds definitely have equal velocities. If you are given an object's velocity, you can definitely determine its speed.

How does the overtone number relate to the standing wave pattern number

Which of the following statements about Em waves is true? A. Em waves all have the same speed B. Em waves all have the same wavelength C. Em waves only travel through water D. Em waves all have the same amount of energy

A teacher has asked four students to state a scientific theory. Which student is correct?

What are the two main currents that affect the US on the east and west coast?

What role do volcanoes play in the flow of energy and cycling of matter on earth?