PHYSICS HIGH SCHOOL

Which of the following most logically completes the argument below? Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce. Because many of those large satellites have ceased to function, the proposal has recently been made to eliminate interference from nonfunctioning satellites by exploding them in space. This proposal, however, is ill conceived, since _______.

(A) many nonfunctioning satellites remain in orbit for years
(B) for satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive
(C) there are no known previous instances of satellites’ having been exploded on purpose
(D) the only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth
(E) a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible

Answers

Answer 1
Answer:

Answer:

  (E) a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible

Explanation:

The trade is one strong reflection for many weak reflections (and more dangerous near-Earth space travel).

None of the answer choices except the last one has anything to do with the effect of exploding a satellite. When you are arguing that exploding a satellite is ill conceived, you need to address specifically the effects of exploding the satellite.


Related Questions

HIGH SCHOOL

Describe the action and reaction force pairs involved when an object falls toward earth

Answers

Before going to answer this question first we have to understand Newton's third law.

As per newtons third law ,for every action,there is an equal and opposite reaction.The force exerted by a body on other body is called action and force that the body gets in turn is called reaction. They will always act on two different bodies and their direction will be opposite to each other.

As per the question a object is falling under gravity. We are asked to find out the action and reaction forces.

We know that every object having mass will imparts gravitational forces on each other.In this question the earth will apply the force of gravity on the body which is in vertically downward direction.Due to this gravity,the body will fall towards earth with an acceleration of 9.8 m/s^2 .This is the force of action.

The falling object also applies same amount of force on earth in vertically upward direction.But we will not notice any acceleration of earth.It is so because the earth is very massive, so the acceleration produced  by earth is very small.The force exerted by the falling object on earth is the force of reaction.



COLLEGE

A motorcycle rider executes a loop-to-loop stunt in a loop with a diameter of 8.4 m At the top of the loop, the rider has a speed of 7.5 m/s. The combined mass of the rider and motorcycle is 175 kg. Determine the normal force between the motorcycle and track at the top of the loop

Answers

Answer:

The normal force between the motorcycle and track at the top of the loop = 2343.75 N

Explanation:

At the top of the loop the track is directed tangential to the motion, the normal to the tangent is along radius of circle. that is here we need to find centripetal force.

We have expression for centripetal force

                 

Here mass, m = 175 kg

        Velocity, v = 7.5 m/s

        Diameter, d = 8.4 m

        Radius, r = 0.5d = 0.5 x 8.4 = 4.2 m

Substituting

       

The normal force between the motorcycle and track at the top of the loop = 2343.75 N

HIGH SCHOOL

Which of the following corresponds to a supersonic speed? a) Mach0.5b) Mach 1.0 c) Mach 1.5

Answers

B I'm pretty sure lol

Answer:

the answer is b

Explanation:

MIDDLE SCHOOL

If coffee is lift sitting on the counter what happens t the thermal energy f the coffee

Answers

The energy goes to anything that is colder than itself. If the coffee is warmer than the mug, than the heat goes to the mug, the to the cool counter and air.
The heat is transferred to the mug
And then to the cool air and makes the temperature of the coffee cold from the cool air. Hopefully this is helpful
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