Which two layers of Earth are mainly composed of iron and nickel? inner core outer core lower mantle upper mantle crust

physics A spherical balloon has a radius of 6.95 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. The skin and structure of the balloon has a mass of 930 kg.

12. A volcano erupts on Earth's surface causing a piece of rock with a mass of 95 kg to be ejected from rest to an acceleration of 9.5 m/s2. What force was exerted on the rock by the eruption? (TEK4D) A 0IN B 10.0N C 95 N D 902.5 N

When Isabela pushes a box

A spring with an unknown force constant is compressed as shown. If the original length of the spring is 60cm, determine (a) the spring force constant (b) the compressive stress in the spring (c) the strain of the spring

A grasshopper floating in water generates waves at a rate of three per second with a wavelength of two centimeters. (a) What is the period of these waves? (b) What is the wave velocity?

What is the net force in the x-direction? 30 N 34 N 55 N 65 N

If an object does not have domains, will it be possible to make it magnetic?

If the loop is then converted into a rectangular loop measuring 2.1cm on its shortest side in 6.50ms, and the average emf induced across the loop is 14.7V during this time period, what is A. the strength of the B-field

Why would you expect to see similar rocks and rock structures on two land masses that were connected at one time?

A quantity that is ignorant of direction is referred to as a