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lever p ulley inclined plane wheel and axle

Week 21 1. When you turn a screw with a screwdriver, you are actually using two simple machines: a screw and the screwdriver is an example of a(n). lever p ulley inclined plane wheel and axle. 2. What simple machine uses a slanted surface that connects a lower level to a higher level?.

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lever p ulley inclined plane wheel and axle

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  1. Week 211. When you turn a screw with a screwdriver, you are actually using two simple machines: a screw and the screwdriver is an example of a(n) lever pulley inclined plane wheel and axle

  2. 2. What simple machine uses a slanted surface that connects a lower level to a higher level? pulley screw wedge lever

  3. 3. Two jars are placed inside an insulated box. One jar contains ice water and the other contains hot soup. What will happen to the two liquids? • Both the hot soup and the ice water will gain heat. • Both the hot soup and the ice water will lose heat. • The hot soup will gain heat, and the ice water will lose heat. • The hot soup will lose heat, and the ice water will gain heat.

  4. 4. Which term refers to the rate of change of motion? • Acceleration • Speed • Momentum • velocity

  5. 5. Which is true about the relationship between an object’s mass and its weight? • The object’s mass is caused by the weight of the object pushing downward. • Weight is gravity’s force on the object, which is determined by its mass. • An object’s weight and its mass are the same, but they are measured differently. • An object’s weight and its mass are independent of each other.

  6. 6. A complex (or compound) machine is a system made up of two or more simple machines. Which of the following machines include both a wedge and a lever? Scissors Wheelbarrow Pulley system Door knob

  7. 7. Which of the following is an example of an object accelerating? A child sitting on a horse on a stopped merry-go-round A runner waiting to start a race A boat traveling at a constant speed down a very straight river A car slowing down at an intersection

  8. 8. Which of the following questions could lead to a scientific investigation? a. How does acid rain affect plant growth? b. Which breed of dogs produces the cutest puppies? c. How can an organism produce happier offspring? d. Does chocolate taste better that peanut butter?

  9. 9. If you apply a constant force of 1 N on a book to pick it up from the floor and set it on a desk 1 m high, how much work did you do on the book? • 0.5 J • 1 J • 5 J • 10 J

  10. 10. The bulb of a thermometer is placed in your mouth. Which of the following explains why the level of the liquid rises in the thermometer? Hot air rises inside the thermometer. Heat energy changes into light energy. The liquid expands when heated. Heat can change a solid into a liquid.

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