Suggest why signals to satellites are transmitted as slightly divergent beam and not as a parallel beam.

Answers

Answer 1

Answer: I can think of two reasons:

1). EVERY transmitted radio signal is transmitted as
a divergent beam. We don't have the technology to
transmit it as a perfectly parallel beam.
That's a good thing, because ...

2). If it were a perfect pencil-thin parallel beam, then
it would be practically impossible to keep it perfectly
aimed at the satellite.

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What sometimes occurs when reclaimed water is used in agriculture?

Answers

I remember this from IPC! If farmers used reclaimed water, there is a chance of chemical contamination in the water can damage the plants, if not kill them entirely! :D

Each day, Ted can wax 8 cars or wash 10 cars, and Tom can wax 3 cars or wash 5 cars. What is each man's opportunity cost of washing a car?

Answers

Answer:

1/2

Explanation:

This will lead us to simultaneous equation since there are two person involved doing the same job each day.

For Ted;

Since Ted can wax 8 cars or wash 10 cars in a day. Mathematically, we have

8x + 10w = 1... (1)

Where x is for waxing cars, w is for washing cars

Similarly for Tom,

Tom can wax 3 cars or wash 5 cars in a day as well, this gives us;

3x + 5w = 1... (2)

Equating 1 and 2, we have;

8x + 10w = 1... (1)

3x + 5w = 1... (2)

Using elimination method, we will multiply eqn 1 by 3 and eqn 2 by 8 to have;

24x + 30w = 3

24x + 40w = 8

Subtracting eqn 4 from 5 we have;

30w - 40w = 3 - 8

-10w = -5

w = 5/10

w = 1/2

Therefore each man's opportunity cost of washing a car is 1/2

A ferris wheel is 20 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 4 minutes. The function h = f(t) gives your height in meters above the ground t minutes after the wheel begins to turn. What is the Amplitude?

Answers

Answer:The amplitude is approximately 4.52 h x 2.3 f(t)

Explanation:

An object of unknown mass is initially at rest and dropped from a height h. It reaches the ground with a velocity v sin θ / g 1. The same object is then raised again to the same height h but this time is thrown downward with velocity υ1 It now reaches the ground with a new velocity υ2. How is v2 related to v1?

Answers

Answer:

$v^(2)_(2)=v^(2)_(1)+(v^(2)Sin^(2)\theta )/(g^(2))$

Explanation:

Case I:

initial velocity, u = 0 m/s

Final velocity, v' = v Sinθ /g

Height = h

acceleration = g

Use third equation of motion, we get

$v'^(2)=u^(2)+2as$

$\left ( (vSin\theta )/(g) \right )^(2)=0^(2)+2gh$

$h = (v^(2)Sin^(2)\theta )/(2g^(3))$ . ... (1)

Case II:

initial velocity, u = v1

Final velocity, v = v2

height = h

acceleration due to gravity = g

Use third equation of motion, we get

$v^(2)=u^(2)+2as$

$v^(2)_(2)=v^(2)_(1)+2gh$

Substitute the value of h from equation (1) ,we get

$v^(2)_(2)=v^(2)_(1)+2g(v^(2)Sin^(2)\theta )/(2g^(3))$

$v^(2)_(2)=v^(2)_(1)+(v^(2)Sin^(2)\theta )/(g^(2))$

Why don't satellites in orbit fall to the ground? Why they don't fly off into space?

Answers

-- The satellite IS falling, but it never reaches the ground because
it's also moving "sideways" ... in the direction of the orbit ... and
because the Earth is shaped like a sphere.

The satellite is moving sideways fast enough so that by the time
it falls 1 foot, the Earth's surface has curved down away from it
1 foot, so it's still the same distance from the Earth's surface.

-- A satellite doesn't fly off into space for the same reason that
a yo-yo doing "around the world" on the end of a string doesn't
fly off ... It's being held onto the circle by the tension in the string,
a force that keeps pulling it toward the center of the circle.

There's a force on the satellite too, that keeps pulling it toward
the center of the Earth. It's the gravitational force between the
Earth and the satellite.

The satellite doesn't fly off into space for the same reason that
YOU don't do that either.

The complex balancing act between a satellite's forward speed and the gravitational force pressing upon it prevents satellites in orbit from falling to the ground or shooting off into space.

When a satellite is put into orbit, it reaches a fast enough speed to escape the Earth's gravitational attraction.

By continuously falling towards the Earth and moving forward at the same time, the satellite may maintain a stableorbit.

This motion results in a curved course, which causes the Earth to be in a constant state of freefall.

Although the satellite is constantly being drawn towards the Earth by gravity, its forward velocity prevents it from dropping.

Thus, satellites don't fall or break free into space and are kept in a stable orbit.

For more details regarding satellite, visit:

brainly.com/question/28766254

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The picture above shows 3 sets of balloons, all with a particular charge. Which of the picture(s) is true? Explain. Then explain why the other 2 pictures are incorrect. Make sure to explain all 3 sets.

Answers

Among all of the others Picture 3 is correct.

We know, Like charges repel each other whereas unlike charges attract each other, In picture 3 they are like charges (both are positive) so, we can repulsion hence, picture is correct!

In picture 1, they are unlike charges, & showing repulsion which is wrong, same In picture 2, they are like charges & showing attraction so they are wrong as well

Hope this helps!

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