What's the mathematical formula for density

Lisa was choosing between three alternatives: working on her job that pays her $60; writing a term paper which she values at $40; or going out with a friend, which she values at $80. The opportunity cost of going out with her friend is

Why scientists must infer what Earths interior looks like

If the lights are off in a room and there are no windows, why do most objects appear black?

What is the current in a 100.-ohm resistor connected to a 0.40-volt source of potential diffrence

The yellow wire connected to a power supply carries 12v. if the power supply provides 60w of power to the yellow wire, how much current is passing through the yellow wire?

What is the difference between convex and concave mirrors and lens?

Which is the best example of Newton's Second Law of Motion? A student has on roller skates and he decides to push against the railing. He immediately begins to roll backwards. A small ball and a larger ball with greater mass are dropped from a roof.

Which of the following represents a car traveling 20 miles/hour? 40 miles traveled in 2 hours 60 miles traveled in 6 hours 40 miles traveled in 3 hours 10 miles traveled in 5 hours

What is micromegas consider to be

A group of scientists is trying to launch an object into orbit, and the object is traveling at 6500 m/s. Which best explains why the object will not successfully orbit Earth? A.) There is not enough air resistance to keep the object moving. B.