A book with a mass of 2.2 kg rests on a table

Find the force of the Earth on the book.

A 3-ohm resistor and a 6-ohm resistor are connected in parallel across a 9-volt battery. Which statement best compares the potential difference across each resistor?

Why does light of a certain frequency need to be used to produce a current in the photoelectric effect? A. The frequency of light must be the same as the frequency of vibration of the atoms in the substance to cause a current. B.

Big Bee has a mass of 5 kg and hits a newly cleaned windshield accelerating at a rate of 2 m/s2. Little Bee has a mass of 3 kg and is accelerating at a rate of 4 m/s2. Which hits the windshield with a greater force? (Show your work below as proof.)

A heat engine produces 8200 j of heat while performing 3200 of useful work. what is the efficiency of this engine? (i'm doing something wrong.)

How to detect an acid / base?

What is the fundamental unit for measuring mass in the metric system?

Why are some craters on the moon bigger than others

What object oriented feature can we use to have a single test program, with one set of method calls in which the user can decide which bag implementation (array - or link-based) needs testing?

What might motivate someone to study forensics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. If r = 17.