What are three elements in the periodic table

Questions 1. Calculate the molar mass of an element. 2. Calculate the molar mass of a compound. 3. How do you determine the number of protons, electrons and neutrons in an atom given it's atomic number. 4.

Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass of 150,000 kg and a velocity of 0.

A train is moving at 35 m/s to the east. it speeds up to 42 m/s east over the course of 40 seconds. what was trains acceleration

a bottle rocket takes off with an acceleration of 34.5m/s^2. it fires until it reaches a height of 200m, then shuts off, and gravity takes over. what maximum height does it reach? (unit = m)

Orbits are more like Ovals that scientists describe as what?

An engineer wishes to design a hydraulic system that will transmit pressure of 10,000 pascals using a force of 15 newton's how are large an area should the input piston have

What is the meaning of heredity

If you push on the sides of a filled balloon, how does the gas pressure inside the balloon change?

A car travels west for 240 km in 4 h. what is the car's velocity?

Dane is holding an 8 kilogram box 2 metres above the ground. How much energy is in the box's gravitational potential energy store? Assume Dane is on Earth, where g = 10 N/kg.