When a glass rod is rubbed with silk and becomes positively charged,

a. electrons are removed from the rod.

c. protons are added to the silk.

b. protons are removed from the silk.

d. the silk remains neutral.?

Two balls each with with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in this collision

Which sentence avoids using a pronoun reference error? They say it's going to rain this weekend. It's going to rain this weekend. Pick your coat up off the floor and vacuum it. none of the above

From the following choices, which object will transfer heat to the other? polar bear or a iceberg

A constant force is exerted for a short time interval on a cart that is initially at rest on an air track. This force gives the cart a certain final speed.

Two students below described a part of Earth's innermost layer: Daniel: Densest part Joshua: Has highest temperature and pressure Which part of the innermost layer did Daniel and Joshua describe? A. They both described the outer part. B.

During World War II, both the Allied and Axis powers used propaganda to A. weaken public support for the war. B. downplay public opinion. C. manipulate the public through the use of humor. D. shape public support of the war

What type of simple machine is a hand drill? A) pulley B) wedge C) ramp D) screw

Calculate the wavelength and frequency of the radiation emitted by the electronic transition from the 10th to the 9th excited state of hydrogen.

An unknown fluid has a specific gravity of 0.750. What is the volume of 22.5 kg of this fluid? A. 10 L B. 20 L C. 30 L D. 40 L

What kind of tide is responsible for extreme tides