PHYSICS HIGH SCHOOL

The statement that "The universe is the same everywhere and does not change over time" is known as _____.a. the cosmological principle
b. the perfect cosmological principle
c. the oscillating universe theory
d. the steady state theory

Answers

Answer 1
Answer:

Answer: b. the perfect cosmological principle

Explanation:

The perfect cosmological principle is the extension of the cosmological principle. It states that the universe is homogeneous. It looks same from everywhere. It will look the same. It will never change over time instead of some of the gross changes occurring in the universe.

Answer 2
Answer: The answer is B- Perfect Cosmological Principle

Sorry it took people so long to anser:)

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based on your reading "take a closer look" what can you say about the image that forms on the retina of your eye?

Answers

Answer:

The lens of the eye is a convex lens. The image that it forms on the retina is upside down.

Explanation:

The eye makes an image, but it is upside down, the brain corrects the image and turns it right side up

Answer:

it is an upside-down image but the brain realizes it and corrects it in its orientation so we see it in right direction.

A doctor diagnoses a man with an acute strain. Which job is most likely to cause an acute strain?furniture mover
bank teller
baseball player
heart surgeon

Answers

Answer:

Furniture mover.

Explanation:

A strain is a soft tissue injury that happens on the muscle or tendon - it could occur on several parts of the body, such as hands or legs. When it is acute, an incident might have caused it and proper rest would let it heal.

This type of injury could happen to athletes, but those who are at risk are those who are involved in sports field such as wrestling and football. Thus, baseball players are a lower risk.

Bank tellers and heart surgeons would not suffer from this type of injury - they are more likely to suffer from chronic than acute strains do to the overuse of certain muscles.

The group that is at the highest risk are people who move heavy objects - such as furniture mover.

Answer:

Its A.

Explanation:This type of injury could happen to athletes, but those who are at risk are those who are involved in sports field such as wrestling and football. Thus, baseball players are a lower risk.Bank tellers and heart surgeons would not suffer from this type of injury - they are more likely to suffer from chronic than acute strains do to the overuse of certain muscles.

Planet 1 has mass 3m and radius r, while planet 2 has mass 4m and radius 2r. they are separated by center-to-center distance 8r. a rock is placed halfway between their centers at point o. it is released from rest. ignore any motion of the planets.Part (a) Derive an expression, in terms of relevant system parameters, for the magnitude of the acceleration a of the rock at the moment it is released Part (b) Calculate the magnitude of the acceleratiom of the rock (in m/s2) the moment it is released, using M=2x10^21 kg and R= 25 x10^6
Part (c) The rock is released from rest at point o Derive an expression for the speed v with which the rock crashes into a planet Part (d) Calculate the speed the rock crashes into the planet in m/s

Answers

The magnitude of the rock's acceleration half-way between two planets is 1.086 m/s².

The given parameters;

   mass of planet, A = 3M

   radius of the planet A, = R

   mass of planet B, = 4M

   radius of planet B, = 2R

   distance between the two planets, r = 8R

The gravitational force half-way (4R) between the two planets is calculated from Newton's universal gravitational law as follows;

SEE IMAGE 1

The magnitude of the rock's acceleration is calculated from Newton's second law of motion as follows;

SEE IMG 2

Thus, the magnitude of the rock's acceleration is 1.086 m/s².

To know more about magnitude of the rock visit:

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PLX HELPAll elements in the same group
A) have similar chemical properties.
B) are not similar in any way.
C) are in the same state at room temperature.
D) have the same boiling and freezing points.

Answers

The answer to this question is A.

Answer:   THE ANSWER IS A!!

Explanation:

How far can a bus travel in 8 h at an average speed of 60 mph?

Answers

Answer:

480 mph

Explanation:

speed = 60 mph

time = 8 hours

distance = speed*time

             = 60*8

             = 480 mph

What type of bond is formed if atoms donate electrons to other atoms when the elements are combined?

Answers

Ionic bond.

In the ionic bond one atom loses one or more electrons, leaving the atom with positive charge, and the other atom accepts those electrons standing with negative charge.
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