Applied sciences refers to the study of scientific principles. True False

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QUESTION POSTED AT 18/04/2020 - 07:20 PM

Answered by admin AT 18/04/2020 - 07:20 PM

False

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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.

Physics

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

Physics

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

You toss a coin into a eishimg well full of a liquid denser than the coin which of the following could be true the coin will

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QUESTION POSTED AT 02/06/2020 - 01:25 AM

A man stands still on a moving escalator and a woman walks past him in the same direction as the escalator. to a stationary observer the man has a speed of 0.2 m/s and the woman has a speed of 0.5 m/s from the frame or reference of the man on the escalator how fast is the woman walking?

Physics

QUESTION POSTED AT 02/06/2020 - 01:21 AM

A scientific question should be vague creative non-testable non-repeating

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QUESTION POSTED AT 01/06/2020 - 04:46 PM

The mechanical advantage of a compound machine is not related to any of the mechanical advantages of the simple machines that make it. True False

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QUESTION POSTED AT 01/06/2020 - 03:48 PM

A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick up an electric current. The electrodes are named "positive” and "negative,” which were words used by Benjamin Franklin in the 1700s to describe electricity. A bright ray forms in the gas when an electric current is applied to metal electrodes. In the 1800s, an important scientist suspected that the negatively charged particles in a cathode ray were present in all atoms. What procedure would allow that scientist to investigate this idea

Physics

QUESTION POSTED AT 01/06/2020 - 03:39 PM

Which statement is true for a sound wave entering an area of warmer air? A:The wave travels faster and with the same wavelength. B:The wave travels at the same speed but with an increased wavelength. C:The wave travels at the same speed and with the same wavelength. D:The wave travels slower and with an increased wavelength. E:The wave travels faster and with an increased wavelength.

Physics

QUESTION POSTED AT 01/06/2020 - 03:12 PM

What describes the BEST approach when conducting a scientific experiment ?

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QUESTION POSTED AT 01/06/2020 - 03:09 PM

What are examples of devices that use electromagnetic waves? Check all that apply. FM radios microwaves TV remote controls alarm clocks X-rays

Physics

QUESTION POSTED AT 01/06/2020 - 03:07 PM

A load of bricks is lifted to the second floor of a building. How do work and power relate to this job? a.The longer the job takes, the more work is done. b.The faster the job is done, the greater the power. c.The greater the power applied, the more work is done. d.The less work is done, the more power is needed.

Physics

QUESTION POSTED AT 01/06/2020 - 03:00 PM

The Greeks studied charges using _____. gold copper magnetite amber

Physics

QUESTION POSTED AT 01/06/2020 - 03:00 PM

Particle accelerators make it easy for scientists to study what? a)Gravity b)electricity c)quarks

Physics

QUESTION POSTED AT 01/06/2020 - 02:52 PM

Imagine a rock is dropped from the top of a tall building. After 2 seconds of falling, the rock’s instantaneous speed is approximately 20m/s. does anyone know is it true or false

Physics

QUESTION POSTED AT 01/06/2020 - 02:47 PM

A television of mass 8kg sits on a table the coefficient of static friction between the table and television is .48 what is the minimum applied force that will cause the television to slide

Physics

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

A train with a constant velocity of +28.6 m/s approaches a small town . the operator applies the brake, reducing the train's velocity to +11.4 m/s. if the average acceleration of the train during braking is 1.35 m/s2, for what elapsed time does the operator apply the brake?

Physics

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

As an auto mechanic, you need to determine the emf and internal resistance of an old battery. you perform these two measurements: (1) you apply a voltmeter to the battery\'s terminals and read 11.8 v. (2) an ammeter applied to the terminals indicates 16.5 a. what are the battery\'s emf and internal resistance?

Physics

QUESTION POSTED AT 01/06/2020 - 01:40 PM

True or false? when yielding, you are expected to allow other vehicles to move ahead of your vehicle by giving them the right of way

Physics

QUESTION POSTED AT 01/06/2020 - 12:46 PM

A projectile is thrown at an angle 30° from horizontal. Which statement about its vertical component of velocity is true? A.The magnitude of the vertical velocity decreases as the projectile moves upward. B.The magnitude of the vertical velocity remains constant over time. C.The magnitude of the vertical velocity decreases as the projectile moves downward. D.The magnitude of the vertical velocity increases as the projectile moves upward.

Physics

QUESTION POSTED AT 01/06/2020 - 12:14 PM

Which of the following statements are true about metallic bonds? A. Metallic bonds hold together atoms with somewhat similar electronegativities. B. Metallic bonds hold together two atoms of two different nonmetals. C. Metallic bonds exist between two atoms of the same element. D. Metallic bonds hold together a water molecule.

Physics

QUESTION POSTED AT 29/05/2020 - 05:22 PM

When using repeated trials during a scientific investigation, scientists should find the average of their data for use in their final report. True or False?

Physics

QUESTION POSTED AT 29/05/2020 - 04:59 PM

Society is not affected by an individual's choice to use tobacco products. True or False

Physics

QUESTION POSTED AT 29/05/2020 - 04:34 PM

Which of the following is NOT true of both streams AND rivers

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QUESTION POSTED AT 29/05/2020 - 04:07 PM

Eating a balanced diet is important to obtain all needed nutrients and vitamins for the body. true or false

Physics

QUESTION POSTED AT 29/05/2020 - 03:40 PM

Write an expression for the potential energy of a body of mass m in the gravitational field of the earth and moon. let me be the earth's mass, mm the moon's mass (where 81 m m e m = ), r the distance from the earth's center, and r the physics 113p, summer 2015 study guide module 9 © 2015 university of rochester 4 all rights reserved distance from the moon's center. the distance between earth and moon is about 384,400 km.

Physics

QUESTION POSTED AT 29/05/2020 - 02:17 PM

Matter can change its form but it cannot be destroyed. True False

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QUESTION POSTED AT 29/05/2020 - 02:01 PM

A suitable model for air could be b-b's moving rapidly around and colliding with each other. a. True b. False

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QUESTION POSTED AT 29/05/2020 - 01:19 PM

More work was done. Which statement best describes the cause? There was more force applied; therefore, there was less movement. There was less force applied; therefore, there was more movement. There was less force applied; therefore, there was less movement. There was more force applied; therefore, there was more movement.

Physics

QUESTION POSTED AT 29/05/2020 - 12:59 PM

If a force of 27 N is applied to an object with a mass of 6 kg, the object will accelerate at m/s2

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QUESTION POSTED AT 29/05/2020 - 12:52 PM

In order for work to be done, what three things are necessary? power, a force, and movement in the opposite direction of the applied force balanced forces, motion, and distance covered over time unbalanced force, motion in the same direction as the applied force, and power unbalanced force, motion, and movement in the same direction of the applied force

Physics

QUESTION POSTED AT 29/05/2020 - 12:39 PM