Explain how you determined the identity and mass of the element

If 2 electrically charged objects repel one another, which of the statements could be true, one object has more electrons, the other has more protons, both objects have same electrical charge, the objects don't have strong electrical fields,

1. A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.

A squirrel runs at a steady rate of 0.51 m/s in a circular path around a tree. If the squirrel's centripetal acceleration is 0.43 m/s2, what is the radius of the circle? 0.60 m 1.2 m 0.36 m 0.84 m

How does a magnet affect another magnet, something made of iron or a similar metal, and moving charges?

A plant produces its own food through the process of photosynthesis. Which of the following materials do plants need in order to perform photosynthesis? A water and carbon dioxide B nitrogen and salt C phosphorus and oxygen D lipids and oxygen

A car is moving with a velocity (3.0 m/s) € x ˆ + (1.0 m/s) € y ˆ and 3.0 seconds later its velocity is (6.0 m/s) € x ˆ - (3.0 m/s) € y ˆ. What is the direction of the average acceleration of the car?

When water vapor condenses on the inside of a window, the window becomes

Try this out. Use a calculator! We can use the formula KE=0.5m*V^2. To find the kinetic energy (KE) of a payload of mass (m) 100 kg as it flies through the air at the velocity (v) of 55 m/s. (Multiply 0.5 x the mass x velocity squared.

Which group of measurements is the most precise? A) 2 g, 3 g, 4 g B) 2 g, 2.5 g, 3 g C) 2.0 g, 3.0 g, 4.0 g, 5.0 g D) 2.0 g, 3.0 g, 4.0 g

A 946.4 kg (2083 lb) car is moving at 14.8 m / s (33.0 mph). Calculate the magnitude of its momentum.