PHYSICS MIDDLE SCHOOL

A rope can withstand a tension of 12,000 N before it breaks. The weight of a car is 14,000 N. Discuss whether this rope could be strong enough to tow the car

Answers

Answer 1
Answer:

No, the rope would not be strong enough to tow the car since the tension of the rope is less than weight of the car.

How will the tension in the rope support the car's weight?

The tension in the rope must equal the weight of the supported mass. In this case, the weight of the car is 14,000 N, which is greater than the tension the rope can withstand (12,000 N).

Therefore, this rope would not be strong enough to tow the car. It would require a tension strength of at least 14,000 N.

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Answer 2
Answer: probably not strong  because the car weights 2000 more than  the rope

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In order to be neutral, an atom has to contain equal numbers of _______
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A 60-gram sample of radioactive isotope is measured after two half-lives have passed. What pair of percentages describe the sample after two-half lives? A.) 50% unchanged and 50% stable B.) 25% unchanged and 75% stable C.) 12.5% unchanged and 87.5% stable D.) 75% unchanged and 25% stable

How are changes in matter related to changes in energy

Answers

The ability to do work or cause change.
Every chemical and physical change in matter includes a change in energy.
Energy is conserved in a chemical change.
Energy is never created or destroyed.
Energy is only transformed from one form to another.
If the state of matter is a solid and transforms into a liquid,then the energy level is increased and if it is going from a liquid to a solid the energy level is decreased

If the slope of a position versus time graph is downward what kind of motion produced the graph

Answers

If the position vs time graph is sloping downward, that says that the position is
getting smaller as time goes on.  That means that the object is approaching
the place where you're measuring position from.

Please select the word from the list that best fits the definition most destructive kind of mass movement

Answers

The most destructive kind of mass movement a landslide.

What is mass movement?why landslide definition most destructive kind of mass movement?

  • Mass movements are downhill events that transport sediment and other debris, and there are four types of mass movement that have varying degrees of destructiveness. They are landslides, flows, slumps, and creep.
  • The four types of mass movement include landslides, slump, creep, and mudflows. Landslides occur when masses of soil and rocks move down a steep slope.
  • The most destructive type of mass movement is a landslide, which occurs when rock and soil slide quickly down a steep slope. Some landslides may contain huge masses of rock, while others may contain only a small amount of rock and soil.

Landslide is the most destructive kind of mass movement.

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There is no list but I would say a landslide.

A horizontal force of 90.0 N is required to push a 75.0 kg along a horizontal surface at a constant speed. What is the magnitude of the force of friction (90.0N)

Answers

== You're pushing the load straight along the horizontal surface at a constant speed.

== The speed and direction of the load are not changing, so there is no acceleration.

== From Newton's 2nd law of motion, we know that  F = m A .  Since A=0, F must also be zero.  That means NO NET FORCE is acting on the load.

== But how can that be ? You're pushing it with 90 N !

== The NET force is zero.  So something else must be pushing the box, also with 90 N of force, exactly opposite to YOUR force, and they add up to zero.

== THERE's your force of friction !

Final answer:

In this case, the force of friction is 90.0 N. This is inferred from the fact that the object is moving at a constant speed, implying that the force applied is countered by an equal force of friction. This is an application of Newton's first law of motion.

Explanation:

The force of friction can be determined by using the basic principles of physics. In the scenario presented, the box is being moved at a constant speed, which implies that the force of friction is equal to the force applied, 90.0 N. This is because when an object moves at a constant speed, it suggests there is a balance of forces meaning the force you're applying (90.0 N in this case) is battling against an equal force in the opposite direction, this opposing force being the force of friction.

This applies the principles of Newton's first law - an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This equilibrium of forces is what's keeping the box moving at a constant speed.

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Bismuth and fluorine react to form bismuth fluoride. If 41796 g ofbismuth reacts completely with 113.99 g of fluorine, how many grams of
bismuth fluoride are formed?

Answers

The mass of bismuth fluoride formed is 41909.99 g

Explanation:

According to the law of conservation of mass, the total mass of the reactants in a chemical reaction must be equal to the total mass of the products after the reaction.

In this problem, we have:

  • Reactants: bismuth and fluoride
  • Products: bismuth fluoride

We also have:

  • Mass of bismuth: 41796 g
  • Mass of fluoride: 113.99 g

So, the total mass of the reactants is:

M=41796+113.99 =41909.99 g

And therefore, the mass of bismuth fluoride formed is also 41909.99 g.

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I am the process by which rocks change over millions of years.

Answers

The process is erosion, which decomposes rock.

the answer is erosion
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