PHYSICS MIDDLE SCHOOL

You push a friend sitting on a swing she has a mass of 50 kg and accelerates a rate of 4 m/s2 find the force you exerted

Answers

Answer 1
Answer: Force exerted: 100

To find force you multiply the mass by acceleration. The formula is
F = Ma, and the SI unit for force is newtons.

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Which of the following are transferred or shared when two atoms react chemically? *

Answers

Answer:

One of the basic principles of chemistry is the electrostatic attraction between atoms or compounds. Electrons are on the outside of an atoms and that's where the charges come from and the interaction between those charges is what happens during a chemical bond. Therefore the answer would be electrons.

what does it mean for data to be reproducible? how would you conduct an experiment in such a way as to get data reproducible?

Answers

Answer:

Explanation:

If there are n number of groups in an activity and the data produced among them is copied or is same then it is termed as reproducible.

To have an experiment that gives a reproducible data there are few key points which we need to keep in mind.

1- The circumstances provided for every group should be same.

2- Each group must be selected in such a way that participants must have same set of thought processing and mind set toward the situation.
Reproducible is the term where your answers are similar to other groups. If every other group has similar results as yours (only if you use the same measurements) your results are reproducible. If your results are different to every other group your results aren't reproducible.  

As the mass oscillates on a spring, when is displacement at its maximum and velocity equal to zero? A. when it is partially compressed
B. when it is at the equilibrium position
C. when it is fully stretched
D. when it is at near rest

Answers

Answer:

option (c)

Explanation:

The velocity of the oscillating body is zero when it is at its maximum displacement position from its mean position.

So, when the spring is fully stretched, means at maximum displacement the velocity is zero.

C. when it is fully stretched

Which of the following is not needed to make a model of the water cycle?

Answers

grass.. dirt... land things

Answer:

The answer is a drain

What are the short eruptions of intense high-energy radiation from the sun's surface called? A. Corona
B. Prominences
C. Solar flares
D. Sunspots

Answers

The Answer is C. Solar Flares
Solar Flares. solar flares are a certain eruption of magnetic energy on or near the surface of the sun, usually associated with sunspots and accompanied by bursts of electromagnetic radiation and particles ultraviolet and x-ray radiation from sun flares often induce electromagnetic disturbances in the earth's atmosphere.

Why do trains use steel wheels rather than rubber tires?                                                                 A) Steel wheels provide more grip, making it easier to stop a train.B) Rubber tires don't provide enough friction to allow the train to move.
C) Steel wheels increase friction, thus making it easier to move the load.
D) Steel wheels reduce friction, thus requiring less force to move the load.

Answers

D) steel wheels reduce friction, thus requiring less force to move the load.  Friction between rubber and steel would be greater than steel and steel.  Friction creates heat, which represents a loss of energy (which has to come from somewhere else - likely from the kinetic energy of the train)
Steel wheels reduce friction, thus requiring less force to move the load.
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