﻿ In nature, where do fusion reactions take place? - AssignmentGrade.com

# In nature, where do fusion reactions take place?

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

Fusion reactions happen in stars

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### 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

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QUESTION POSTED AT 01/06/2020 - 04:17 PM

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

### Which of the following is not a fossil fuel? a. oil c. coal b. natural gas d. hydrogen

QUESTION POSTED AT 01/06/2020 - 03:36 PM

### Which of the following is not a renewable resource? a. sunlight c. water b. wind d. natural gas

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

### What is the significance of the photoelectric effect? A. it found that you could form a typical diffraction pattern with either high or low intensity light B. it gave evidence for the particle nature of light C. the wave nature of light is a probability statement of where photons are going to be D. it gave evidence that light could be either a wave or a particle

QUESTION POSTED AT 01/06/2020 - 02:48 PM

### What is a characteristic of nuclear fusion but not nuclear fission?

QUESTION POSTED AT 01/06/2020 - 02:19 PM

### If the products of a nuclear reaction have less mass than the reacctants, what happens to the mass, and what formula describves what happens

QUESTION POSTED AT 01/06/2020 - 01:55 PM

### The Siberian Husky is a medium dog, weighing between 16-27kg (35-60lbs). These dogs have strong pectoral and leg muscles, allowing them to move through dense snow. If they had heavier muscles, they would sink deeper into the snow and move slower. Yet, if they had lighter muscles, they would not be strong enough to pull sleds and equipment.This is an example of which type of natural selection?

QUESTION POSTED AT 01/06/2020 - 11:53 AM

### Which statement best describes the relationship between forces? A. Magnetic and electrical forces are the most alike because they are both caused by positive and negative charges. B. Gravitational and magnetic forces are the most alike because they are both types of charges that occur in nature. C. Nuclear and magnetic forces are the most alike because they are both related to mass and weight. D. Strong nuclear force is most like electric because they are both related to distance.

QUESTION POSTED AT 29/05/2020 - 05:02 PM

### A sound wave is an example of an electromagnetic wave in nature?

QUESTION POSTED AT 29/05/2020 - 04:55 PM

### Using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuries.

QUESTION POSTED AT 29/05/2020 - 03:57 PM

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QUESTION POSTED AT 29/05/2020 - 03:19 PM

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QUESTION POSTED AT 29/05/2020 - 02:48 PM

### Karina strikes a match to light a candle. Explain what type of reaction the burning match represents in terms of energy

QUESTION POSTED AT 29/05/2020 - 02:30 PM

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QUESTION POSTED AT 29/05/2020 - 02:30 PM

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QUESTION POSTED AT 29/05/2020 - 01:17 PM

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QUESTION POSTED AT 29/05/2020 - 11:59 AM

### I NEED HELP NOW!!! A 50.00 g sample of an unknown metal is heated to 45.00°C. It is then placed in a coffee-cup calorimeter filled with water. The calorimeter and the water have a combined mass of 250.0 g and an overall specific heat of 1.035 cal/g•°C. The initial temperature of the calorimeter is 10.00°C. The system reaches a final temperature of 11.08°C when the metal is added. What is the specific heat of the metal???

QUESTION POSTED AT 29/05/2020 - 11:05 AM

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QUESTION POSTED AT 29/05/2020 - 10:46 AM

### Find the area of a circle with a radius r of 6 feet. Round off your answer to one decimal point. Hint: the formula for the area of a circle is A = π r2 and π should be approximated to four decimal places.

QUESTION POSTED AT 29/05/2020 - 08:00 AM

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QUESTION POSTED AT 29/05/2020 - 02:10 AM

### In the following reaction, which substance is the precipitate?(NH4)2SO4(aq) + Ba(NO3)2(aq) BaSO4(s) + 2NH4NO3(aq 1) (NH4)2SO4 2) Ba(NO3)2 3) BaSO4 4) NH4NO3

QUESTION POSTED AT 29/05/2020 - 01:47 AM

### In a ________ reaction, a complex substance breaks down into simpler substances.

QUESTION POSTED AT 29/05/2020 - 01:07 AM

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QUESTION POSTED AT 29/05/2020 - 12:56 AM

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QUESTION POSTED AT 29/05/2020 - 12:41 AM

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QUESTION POSTED AT 28/05/2020 - 11:50 PM

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QUESTION POSTED AT 28/05/2020 - 11:12 PM

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QUESTION POSTED AT 28/05/2020 - 11:03 PM

### Blank occurs when the frequency of a forced vibration is the same as the object's natural frequency.

QUESTION POSTED AT 28/05/2020 - 10:53 PM