QUESTION POSTED AT 16/04/2020 - 06:21 PM

Energy is the capacity to do work

## Related questions

### Earth's oceans have an average depth of 3800 m, a total area of 3.63 × 108 km2, and an average concentration of dissolved gold of 5.8 × 10?9 g/l. how many grams of gold are in the oceans? enter your answer in scientific notation.

QUESTION POSTED AT 02/06/2020 - 01:44 AM

### 1. An object is moving to the right in a straight line. The net force acting on the object is also directed to the right, but the magnitude of the force is decreasing with time. How will the motion of the object change? a. It will continue to move to the right, its speed increasing with time. b. It will stop and then begin moving to the left. c. It will continue to move to the right at a constant speed. d. It will continue to move to the right, its speed decreasing with time. 2. A glass table top is able to exert a maximum normal force of 1600 N. A large object with a mass of 165 kg is gently lowered onto the center of the table top, then released there. What most likely will happen next? a. The table top will crack but still hold the object. b. The table top will break and the object will fall to the floor. c. The object will bounce off the table. d. The object will rest on the table top, which remains in tact. 3. A rock at rest has weight 138 N. What is the weight of the rock when it is accelerating upward at 12 m/s2? a. 115 N b. 63 N c. 304 N d. 138 N 4. A chair of mass 30.0 kg is at rest on a horizontal floor. The floor is not frictionless. You push on the chair with a force of 80.0 N directed at an angle of 35.0° to the floor. What is the normal force that the floor exerts on the chair? a. 363 N b. 340 N c. 294 N d. 317 N 5. Two particles are separated by a distance d. At this distance, the strong interaction between them is much greater than the electrical interaction. What are the possible values of d? a. extremely large values, such as the distances between the planets and sun b. extremely small values, such as the distances between particles in an atomic nucleus c. values between 1 mm and 1 m d. values between 1 m and 1 km 6. A soccer player kicks a ball. Why does the action force exerted by the player's foot cause a different motion than the reaction force? a. The action force and the reaction force act on different objects. b. The action force is greater than the reaction force. c. The reaction force is greater than the action force. d. The action force and the reaction force act in opposite directions. 7. A box of weight 320 N is being pulled to the right by a pulling force F-> of magnitude 44 N. The coefficient of static friction between the box and the floor is 0.15. To make an accurate free-body diagram of the box, the letter f in the diagram above should be replaced with the label _____. a. 4.0 N b. 48 N c. 44 N d. 280 N 8. I have the answer 9. A man pulls a wagon with a handle that is at an angle of 42° with the ground. If the man pulls with 330 N of force, how much force pulls the wagon forward? a. 110 N b. 220 N c. 245 N d. 330 N 10. In this free-body diagram, the weight (W) and normal force (n) have equal magnitudes. The magnitudes of any forward or backward forces, however, are not determined. The free-body diagram will not apply to which of these objects or persons? a. a box sliding across a table at constant speed b. an automobile accelerating on a flat highway c. a box at rest on a table d. a woman jumping off the floor 11. A force of 1 N will cause a mass of 1 kg to have an acceleration of 1 m/s2. Therefore, a force of 8 N applied to a mass of 1 kg will cause it to accelerate at what rate? a. 8 m/s2 b. 0.13 m/s2 c. 1 m/s2 d. 9 m/s2 e. 64 m/s2

QUESTION POSTED AT 02/06/2020 - 01:27 AM

### A puppy weighing 3 kilograms races through the dog park. If she slows from a speed of 2 meters/second to 1 meter/second, what will happen to her kinetic energy?

QUESTION POSTED AT 01/06/2020 - 04:43 PM

### The energy that powers a hurricane is derived from?a.)a stationary front.c.)funnel clouds.b.)condensation of water vapor.d.)sublimation of water.

QUESTION POSTED AT 01/06/2020 - 04:32 PM

### A pendulum has 141 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing?

QUESTION POSTED AT 01/06/2020 - 04:04 PM

QUESTION POSTED AT 01/06/2020 - 03:43 PM

### Which apple has the greatest potential energy?

QUESTION POSTED AT 01/06/2020 - 03:29 PM

### Which apple has the greatest potential energy?

QUESTION POSTED AT 01/06/2020 - 03:27 PM

### Which of the following is an INCORRECT statement describing energy. Total energy within a closed system stays constant. The total energy in the Universe is in a state of flux. Energy can be stored as mass. Energy can be transferred from one form to another in a closed system.

QUESTION POSTED AT 01/06/2020 - 03:20 PM

### PLEASE HELP!!! A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal. Which energy transformation represents this process? chemical energy into thermal energy potential energy into kinetic energy kinetic energy into electromagnetic energy potential energy into chemical energy

QUESTION POSTED AT 01/06/2020 - 03:16 PM

### Which biomes yearly rainfall mainly evaporates? i need a answer ASAP

QUESTION POSTED AT 01/06/2020 - 03:13 PM

### Which best explains why one laser beam might appear blue and another laser beam might appear red? The energy in laser beams is concentrated. The energy in laser beams is scattered. Each laser beam is made up of all visible wavelengths of light. Each laser beam is made up of one specific wavelength of light.

QUESTION POSTED AT 01/06/2020 - 03:13 PM

### A ramp is often used to raise an object. If 80 joules of energy are needed to lift an object to a platform but 100 joules are used in rolling the object up the ramp, what is the efficiency of the ramp?

QUESTION POSTED AT 01/06/2020 - 03:05 PM

### A man with mass 82 kg runs at a speed of 2.8 m/s. How much kinetic energy does he have?

QUESTION POSTED AT 01/06/2020 - 02:34 PM

### Dominoes standing in a row will fall if the first one is tipped towards the others. How does the law of convection of energy describe this?

QUESTION POSTED AT 01/06/2020 - 02:26 PM

### Cereal plants gain chemical potential energy as they grow. which form of energy is converted to create the chemical potential energy?

QUESTION POSTED AT 01/06/2020 - 02:24 PM

### What kind of energy is stored when you stretch a spring?

QUESTION POSTED AT 01/06/2020 - 02:23 PM

### A 7.2 × 10–5 C charge has an electric potential energy of 1.08 × 10–2 J. The electric potential, to the nearest whole number, is V.

QUESTION POSTED AT 01/06/2020 - 02:17 PM

### A compressed spring has 16.2J of elastic potential energy when it is compressed 0.30m . What is the spring constant of the spring?

QUESTION POSTED AT 01/06/2020 - 02:15 PM

### The electrical energy that moves through a surge protector is 1.8 kilowatt-hours. How many watts of power will the surge protector use in one hour?

QUESTION POSTED AT 01/06/2020 - 02:07 PM

### A baseball outfielder throws a 0.150-kg baseball at a speed of 40.8 m/s and an initial angle of 28.0°. what is the kinetic energy of the baseball at the highest point of its trajectory?

QUESTION POSTED AT 01/06/2020 - 01:51 PM

### A balanced relationship between the energy that you intake and your bodys energy output is the definition of _____.

QUESTION POSTED AT 01/06/2020 - 12:52 PM

### What is the total energy expenditure for a 70-kg man doing an exercise session composed of 5 min of warm-up at 2.0 metabolic equivalents (met), 20 min of treadmill running at 9 met, 20 min of leg cycling at 8 met, and a 5 min cool-down at 2.5 met?

QUESTION POSTED AT 01/06/2020 - 12:45 PM

### Describe and explain the potential energy changes that occur during the formation of a covalent bond

QUESTION POSTED AT 01/06/2020 - 12:39 PM

### What is the source of energy that directly drives atp synthase in its production of atp? hints what is the source of energy that directly drives synthase in its production of ? protons diffusing through the f0 section of atp synthase the hydrolysis of atp the oxidation of nadh the oxidation of fadh2 the oxidation of glucose?

QUESTION POSTED AT 01/06/2020 - 12:23 PM

### Explain what happens to the average kinetic energy, thermal energy, and temperature of a substance when the particles in the substance slow down

QUESTION POSTED AT 01/06/2020 - 12:19 PM

### Consider this statement: Air is matter. Which facts best support the statement? (May be multiple answers) A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F. Air can’t be seen.

QUESTION POSTED AT 29/05/2020 - 04:33 PM

### When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy. The more steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted. Which object would likely have the least amount of wasted energy? A) an electric drill B) a solar cell C) a car engine D) a hydroelectric dam

QUESTION POSTED AT 29/05/2020 - 04:29 PM

### Which object has more gravitational potential energy? Use PE = m × g × h, where g = 9.8 meters/second2.

QUESTION POSTED AT 29/05/2020 - 03:38 PM

### An ___ wave carries energy through matter

QUESTION POSTED AT 29/05/2020 - 03:37 PM