Q1. Give 2 characteristics of high mass stars

Which of the following statements are true. A. Conductors consist of metals, like silver, copper, iron. Insulators consist of nonmetals like wood, plastic, wool. B. Conductors consist of nonmetals like wool, wood, plastic.

A sphere of mass 0.5kg is dropped into a column of oil. At the instant the sphere becomes completely submerged in the oil, the sphere is moving downward at 8m/s, the buoyancy force on the sphere is 4.0N, and the fluid frictional force is 4.0N.

If we want to describe work, we must have an action which causes no movement or reaction. a force and a movement in the opposite direction of the force. a force and a movement in the same direction as the force.

Part A By what distance do two objects carrying 1.0 C of charge each have to be separated before the electric force exerted on each object is 4.0 N? Express your answer with the appropriate units.

A 1250 kg car starts from rest and speeds up to 14.0 m/s in 7.25s. How much force acted on the car?

Which actions are evidence that a chemical reaction has occurred? Check all that apply. A: a change in color B: the formation of a precipitate C: a clear liquid becoming cloudy D: a change in shape E: the formation of bubbles F: the formation of

Which sphere forms Earth's outermost layer? Atmosphere Biosphere Cryosphere Hydrosphere

an 100kg object traveling at 50m/s collides (perfectly inelastic) with a 50kg object initially at rest. what is the sum of the momentum of both objects prior to the collision?

A train moves at constant velocity of 50km/h. how far will it move in 0.5h?

Which process best describes part of a scientific investigation? O designing a solution O evaluating the conclusion O evaluating the solution O identifying the conclusion