PHYSICS HIGH SCHOOL

Which statement is true about the scientific method?A.
It follows one prescribed sequence of steps.
B.
It begins and ends with an experiment.
C.
It is used only in Earth and space science.
D.
It can be cyclic.

I need an answer now please....

Answers

Answer 1
Answer:

Answer:

D. It can be Cyclic

Explanation:

Science has all different kinds of alike processes.

The scientific method is a generally and usually a Cyclical Process.

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a boy on a bicycle is resting at the top of a hill then he rides his bicycle down the hill describe how the boy potential and kineti energy differ at the top middle and bottom of the him

Answers

Answer:

Explanation:

As the boy is riding from top to bottom of the hill his Potential energy gradually decreasing and simultaneously converting into the Kinetic energy.

At the top, his Potential Energy is maximum and kinetic energy is minimum i.e. zero

In the middle of the hill, he possesses both Potential and kinetic energy with equal magnitude.

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Alvin and Theodore race across a parkinglot 360 cm long. Alvin travels at 22.03 cm/s
and Theodore at 17 cm/s.
When the Alvin crosses the finish line, how
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Answer in units of cm.

Answers

Theodore will cross 82.2 cm behind Alvin

How do you find the pressure (in physics) if you are given the force (Newtons) and how far the object sunk into the ground?

Answers

Answer:

pressure=force/area

Explanation:

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What is the biggest planet in our galaxy

Answers

We won't be able to answer that until we've seen all of them and
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 Which explanation of the solar system best fits the observations of the planets and how they orbit the sun? (Points : 3)       The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets.The planets formed at the center of a collapsing spinning cloud of gas and dust.
       The sun and planets formed from a collapsing spinning cloud of gas and dust.
       A comet hit the sun and sent off fragments that became the planets.

Answers

From those choices, the best is the third one. it relates to why the sun and almost everything else in the solar system spins in the same direction, and also why the abundance of various elements in the planets is so different from what it is in the sun.

An ultrasound unit is being used to measure a patient's heartbeat by combining the emitted 2.0 MHz signal with the sound waves reflected from the moving tissue of one point on the heart. The beat frequency between the two signals has a maximum value of 560 Hz . What is the maximum speed of the heart tissue? The speed of ultrasound waves in human tissue is 1540 m/s.Express your answer to two significant figures and include the appropriate units.

Answers

Hi there, 
for this question we have:
Signal 2.0 MHz = Emitted so we can call it f_e
and we need the Reflected = f_(r)
In this question, we have a source which goes to the heart and a reflected which comes back from the heart and we need the speed of the reflected.
So you should know that the speed of reflected is lower than the source(Emitted). 
we also know: ΔBeat frequency(max) = 560 Hz = f_(b)
so we have: 
f_(e) - f_(r) = f_(b)
so frequency of Reflected is: 
2.0 × 10^6 Hz - 560 Hz = 1.99 × 10^6 Hz = f_(r)
now you know that Lambda = v/f 
so if we find the lambda with our Emitted then we can find v with the Reflected: 
Lambda = 1540(m/s) / 2.0 × 10^6 Hz = 7.7 × 10^-4 m 
=> v_(max) = (lambda)(f_(r) 
=> 7.7 × 10^-4m (1.99 × 10^6Hz) = 1532 m/s 
so the v_(max) is equal to 1532 m/s :)))
This question is solved by two top teachers as fast as they could :))
I hope this is helpful
have a nice day
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