What are the four main parts of a spiral galaxy?

The atomic mass of an element is equal to the number of: A: protons B: protons plus neutrons C: protons plus electrons D: neutrons

Suppose you want to move a big rock in your yard. It is about waist high and 4 feet long, has a volume of 1.2 m3 and a density of 2.5 g/cm3. How much does it weigh, in units of lbs?

A beaker contains 450g of water at a temperature of 24C, The therman capacity of the beaker is negligible and no heat is gained by, or lost to, the atmosphere.

A wire that has a resistance of 1Ω is to be built from an aluminum block of volume 1 cm3 . How long is the wire going to be?

Which is an action that can cause an object to move or change its state of motion? energy force equilibrium inertia

In the physics of motion a force acting over a distance is?

What is the resistance of a clock if it has a current of 0.30 a and runs on a 9.0-v battery? 0.033 2.7 9.3 30

A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

An accelerating voltage

A speck of dust on a spinning dvd has a centripetal accelera - tion of 20 m/s2. a. what is the acceleration of a different speck of dust that is twice as far from the center of the disk? b.