Question 1 (1 point) Which example shows electrical energy being transformed into heat energy? burning a wax candle sunlight heating a metal door rubbing two sticks together a small toaster oven toasts a bagel Question 2 (1 point) Marco's Pitching Speed Speed (MPH) Pitch 1 52 Pitch 2 49 Pitch 3 50 Pitch 4 52 Marcos is trying out for the school baseball team. He is practicing his pitching. HisMarco's Pitching Speed Speed (MPH) Pitch 1 52 Pitch 2 49 Pitch 3 50 Pitch 52 Marcos is trying out for the school baseball team. He is practicing his pitching. His Dad is timing his pitches. You can see the speed of four throws in the table above. Marcos used the LEAST energy to throw which pitch? Pitch 1 Pitch 2 Pitch 3 Pitch 4 Question 3 (1 point) A 10-kg box sits on the floor. Approximately how high would you have to lift the box to increase the gravitational potential energy by 350 J? 13.5 m 1 7.0 m 15 m 40 m Question 4 (1 point)40 m Question 4 (1 point) Electrical Kinetic Energy Generator Energy Heat and Sound A generator has an efficiency of 80%. When 200 joules of electrical energy is provided by a battery, How much heat and sound is generated by the generator? 40 joules 60 joules 80 joules 160 joules Question 5 (1 point) PE = 100J A KE - 0 PE - 50J KE . PE - KE - If an object has 100 joules of potential energy at the top of a ramp. How much kinetic energy will there be at the other two places indicated? What assumptions must be made to get these answers, if any?Page 1: 60 joules 2 1 w 80 joules 160 joules Question 5 (1 point) PE = 100J KE = 0J PE = 50J KE J PE - KE - _J If an object has 100 joules of potential energy at the top of a ramp. How much kinetic energy will there be at the other two places indicated? What assumptions must be made to get these answers, if any? 50 joules and 100 joules assuming there is no friction. 50 joules and 100 joules with no assumptions needed. 100 joules and 150 joules assuming there is no friction. 100 joules and 150 joules with no assumptions needed. Question 6 (5 points) Select the correct answer from the item bank to fill in the blanks to complete the following paragraph 1. A 2-kg object is dropped from a height of 10 meters. The potential energy can be calculated by using U=mgh the formula _.Page 1: 100 joules and 150 joules with no assumptions needed. 2 W Question 6 (5 points) A 15 16 Select the correct answer from the item bank to fill in the blanks to complete the following paragraph. 1. A 2-kg object is dropped from a height of 10 meters. The potential v U=mgh energy can be calculated by using the formula v K=1/2mv 2. The potential energy is calculated as (use g=10m/s for your calculation). 100 joules 3. If the object strikes the ground with a speed of 5 m/s, then using the heat formula the kinetic energy is 100 joules. 4. This requires that of 200 joules energy is turned into 5. and eventually released to its surroundings. Submit Quiz 0 of 6 questions saved