2

Which one of the following statements concerning the principle of conservation of energy is false? а. The total energy in the universe has a constant value. b. Kinetic energy may be converted into gravitational potential energy and heat. c. Thermal energy may be converted into kinetic energy and kinetic energy may be converted into thermal energy. d. Chemical energy may be converted into thermal energy and gravitational potential energy. е. The net work done on an object must be zero joules since energy is neither created nor destroyed in the process.

Please complete the table below

2.B.83 Question Help v Suppose you require 2500 food Calories per day. a. What is your average power, in watts? b. How much energy, in joules, do you require from food in a year? Counting all forms of energy (such as gasoline, electricity, and energy for heating), the average person consumes about 350 billion joules of energy each year. Compare this value to the energy needed from food alone. a. What is your average power, in watts? Approximately (Round to the nearest whole number as needed.) watts

4. Always begin by writing the general form of an equation. Insert numbers and units. Remember to show all work (and units). Present  the solution well organized and clearly. answer should be: a) F=566N, FN=1.13x103N just need an explanation on how to get to this.

Q1/ Correct the following statements (True/False). 1. Energy is not equal to the work done. 2. The amount of kinetic energy depends only on the mass. 3. Energy has the same quantity if any type of force is applied. 4. potential energy can be calculated at the ground level (horizontal). 5. Mechanical energy can change into heat because of conservative force.

During the extinction of the dinosaurs, a meteor with a mass of about 1.4 x10^8 kg hit the ground at a speed of 12km/s. How much energy did the meteor deliver to the ground? (round your answer to 3 significant figures) A. 2.02 x 10^10 Joules B. 1.01 X 10^10 Joules C. 1.01 X 10^16 Joules D. 2.02 x 10^16 Joules

The total consumption of electrical energy in the United States is about 1.37 x 1019 joules per year. ▼ Part A What is the average rate of electrical energy consumption in watts? VO ΑΣΦ Submit Request Answer Part B V Submit ΑΣΦ 4 If the population of the United States is 310 million, what is the average rate of electrical energy consumption per person? Give your answer in kilowatts per person. Request Answer B O ? 24 W 4 kW/person

1. A1 kg rock is at a height of 100 meters. a. What is the rock's gravitational potential energy at 100 meters high? b. Calculate the rock's gravitational potential energy at 50 m, 20 m, 1 m, and 0 m high. Put the answers in the data table below. Height (m) Potential energy (J) c. Make a graph of height versus energy. d. What can you conclude about the gravitational potential energy of the rock as height is changed? Explain how you know that using evidence from your graph.

1

40.) Power is the rate at which energy is transferred. work is the process of transferring energy from one object to the other. a. true b. false

2. Write an expression for the kinetic energy of an object in a circular orbit. Write this in terms of the object's GPE.

Answer both or NONE   Part 1 -  A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic energy, in kJ (kiloJoules)?  Your answer needs to have 2 significant figure, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.   Part 2-  A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW (kiloWatts)?  Your answer needs to have 2 significant figure, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

box or circle the answer please

I need help finding how many types of energy radiant treatment for cancer has and what they are.

1) Prof. K. took a Tesla Model S for a test drive. The car weighs 4,500 lb and can accelerate from 0 to 60 mph in 2.27 seconds. The car has a 581 kW battery pack. Help Prof. K. determine the efficiency of the vehicle [Ans. to Check 55.5%]. Note: The equation we learned in class P = E v ONLY APPLIES if velocity is constant. Use the steps below to guide your thought process. Develop a symbolic relationship for the force required to move the car forward. Compute the work done by the car (in Ib-ft). Calculate the power required to do this work (in kW).

I. A baseball with a mass of 0.65 kg was pitch into the air at a height of 25 meter above the ground with a velocity of 15 m/s. Determine the followinga. the baseball's kinetic energyb. the gravitational potential energy of the baseball relative to the ground. II.  Solve the work done by a 600 W electric mixer in 2.3 minutes.

How much is the work done by friction to stop the car from 50 km/Hr if the mass of the car is 2500 kg. a. 2.41 x 10^- 5 Joules b. 3.125 x 10 ^6 joules. c. 3.47 x 10^4 Joules d. 2.41 x 10 ^ 5 Joules

5. According to the law of conservation of energy, the total amount of energy in the universe a. remains constant c. increases d. decreases b. changes constantly 6. A device that does work with only one movement and changes the size or direction of a force is a(n)_ a. compound machine b. effort machine с. screw d. simple machine 7. The amount by which a machine multiplies an effort force is called the a. efficiency factor b. fulcrum c. mechanical advantage d. resistance force 8. A machine that has the same output force as the input force has a mechanical advantage of с. 5 d. 1 a. 100 b. 10 9. The unit of power is the a. joule b. watt с. m/s d. second 10. Machines make tasks easier by changing either the magnitude or the direction of the a. force b. work needed. c. energy d. velocity 1/6 >

solve the following. Provide 1. Given 2. Required 3. Equation 4. Solution 5. Answer

Question has TWO parts Your answer needs to have 2 significant figure, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.  Part A - A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic energy, in kJ (kiloJoules)?    Part B - A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW (kiloWatts)?

19. If the value of R is increased, does AVat increase, decrease, or stay the same? Explain. ww

3. Write an expression for the total energy of an object in a circular orbit. Write this in terms of the object's GPE.

1000 gal/min of water is cascading down a height of 100 feet from a reservoir. If half of the energy generated is converted to electrical energy, how many 100-watts bulb can be lighted in 30 seconds? A. 84B. 86C. 94 D. 90 Ans: C. 94

4. Answer the below questions using this graph. V(V) 4 6 40 30 20 10 0 0 2 a. What is Ex at 1m? Answer: b. What is Ex at 4m? c. What is Ex at 7m? -x(m) 8

Choose the correct answer Your Lecturer in class made the following statement: "We do not buy electrons from Eskom but we buy electrical energy!". Electrical Poerr can be described as electrical energy unit time. Electrical Energy can be brought from ESKOM in units of R2,50 for 1 KiloWatt- hour. How much will it cost to operate a 1200 W hairdryer continuously for 30 minutes?   A. R3,00 B. R1,50 C. 60c D. R6,00

What is the difference between when work is done by a system and when work is done on a system? a. Work done on a system causes an increase in the energy of the system. O b. Work done by a system causes an increase in the energy of the system. O c. С. None of them makes ay difference in the energy of the system.

Which of the following is NOT an energy unit? (choose one best) a. watt x sec b. watts c. joules d. N x m

1. Calculate the speed vB the cube at point B (yB = 2.0 m). 2. Calculate the speed vC the cube at point C (yC = 1.0 m). 3. Calculate the speed vD the cube at point D (yD = 2.0 m). 4. Calculate the speed vE the cube at point E (yE = 3.0 m).

B. Answer the following problem scientifically. Use the GRESA method and box your final answer. 1) A ball has 17J of kinetic energy and its mechanical energy is 25J. a. Find the gravitational potential energy of the ball' C? b. If the ball has a mass of 3,2 k& what is Its height above the ground? c. What is the speed of the ball?

E2:: need help. This is all the information I was given. If I needed I would look it up online

Power is measured in the units of? Choose all that apply.   A. kJ (Kilojoules)   B. Nm/s ( Newton meter per second)   C. Joules/ sec ( J/s)   D. Watt

1. Convert the info related to the specification and performance of the 718 cayman GT4above to SIunits. (note that 1 hp= note that 1 hp= 735 watt) 2. If the power = force *distance/time, measured by Watt. Define 1Watt in terms of the fundamentalSI units 3. Identify which quantities are basic and which are derived quantities

Okay so question 1 2 and 3 have been solved, the answers are  1. a = 3.5233 m/s^2 2. a = 4.7354 m/s^2 3. v = 8.3944 m/s PLEASE SOLVE 3 THROUGH 4 ONLY, written work only please

I'm trying to understand the different types of energies.  I understand the definitions, but when I apply them to situations, it doesn't make much sense to me. I have the following: A. Entrophy - measure of the amt of disorder, or randomness in a system B. Kinetic Energy - Energy in Motion C. Heat - kinetic energy contained in the random motion of atoms & molecules D. Chemical Energy - type of potential energy which arises from the arrangement of atoms and be release in chemical reactions E. Conservation of Energy: Kinetic to Potential Energy - its not possible to destroy or create energy F. Conservation of Energy: Potential to Kinetic G. Potential Energy - Energy an object has because of its location or structure   When I try to apply to the following, I come up with this: A: A Glass falls off the shelf & breaks B. An orange falling from a tree C. During exercise you get extremely hot. D Animals consume food (organic molecules) to make ATP to walk, breathe, etc. E. A large…

11. Students are designing an experiment to identify the transformations between potential and kinetic energy. Which factors should students evaluate to explain these transformations? A. Friction B. Total Energy С. Mass D. Height E. Speed F. Acceleration 6. © 2018 Rabieh J Hafza, PhD. 20 K B.

Which of the following is the correct combination of dimensions for energy? O a) ML/T² O b) MLT Oc) LT² /M d) M²L³T O e) ML²/T²