How long will it take this wave to travel 3000 m in the x-direction?

An elements atomic number is 30. How many protons would an atom of this element have?

How many years does one month symbolize on the cosmic calendar

What type of wall would make the best soundproofing for room

a large cargo trucks needs to cross a bridge the truck is 30m long, and 3.2 wide, the cargo exerts a force of 54,000 N the bridge can withstand 450 PA of pressure. is it safe for the truck to cross the bridge?

List as many different uses as you can for plane, convex and concave mirrors.

A 1.00x10^3 crate is being pushed across a level floor at a constant speed by a force

How could you make a sound wave have a lower pitch

Ice caps at the north and south poles are very reflective the ice reflects light and heat rather than absorbing it.

When you jump straight up as high as you can, what is the order of magnitude of the maximum recoil speed that you give to the Earth? Model the Earth as a perfectly solid object.

Consider the Sun and Earth as a single system. How does the law of conservation of energy apply to this system? A) The energy from the Sun that reaches Earth is destroyed by Earth.