1. a 1000-kg car moves as speed from 10 m/s to 30 m/s in 20 seconds. what is the average speed? what is the acceleration? what is the average force acting upon it? if the car turns along a circle at speed 5 m/s around a curve 30 meters in radius, how big the centripetal force is needed?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted