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4 years ago

14

Who needs to know physics when they are making a satellite

1 answer:

vladimir2022 [97]4 years ago

4 0

First satellite was Sputnik and it was a race then to send satellites!! Everyone starts experimenting how to launch.

first try was on a dog , Laika !! It was send to space as it is long after sputnik is placed in orbit !!

Now you know everyone knows rocket science and the most active are ISRO (India) and NASA (USA) !!

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Consider two antennas separated by 9.00 m that radiate in phase at 120 MHz, as described in Exercise 35.3. A receiver placed 150

Dafna11 [192]

Answer:

a

$\Phi =4.524 \ rad$

b

$I = 0.40637 I_o$

Explanation:

From the question we are told that

The distance of separation is $d = 9.0 \ m$

The frequency is $f = 120 \ MHz = 120 *10^{6} \ Hz$

The distance of the receiver from the antennas is $D = 150 \ m$

The intensity measured is $I = I_o$

The change in position of the receiver is by $\Delta D = 1.8 \ m$

Gnerally the phase difference is mathematically represented as

$\Phi = \frac{ 2 \pi * \Delta D}{\lambda}$

Here $\lambda$ is the wavelength which is mathematically represented as

$\lambda = \frac{c}{f}$

Here c is the speed of light with value $c = 3.0 *10^{8} \ m/s$

=> $\lambda = \frac{3.0 *10^{8}}{ 120 *10^{6} }$

=> $\lambda = \frac{3.0 *10^{8}}{ 120 *10^{6} }$

=> $\lambda = 2.5 \ m$

So

$\Phi = \frac{ 2* 3.142 * 1.8 }{2.5}$

$\Phi = \frac{ 2* 3.142 * 1.8 }{2.5}$

$\Phi =4.524 \ rad$

Generally the intensity measured by the receiver is

$I = I_o cos^2 [\frac{\Phi}{2} ]$

=> $I = I_o [cos [\frac{4.524}{2} ]]^2$

=> $I = I_o [cos [ 2.262]]^2$

=> $I = 0.40637 I_o$

6 0

3 years ago

A bucket of water with mass 5 kg sits on the ground with a coefficient of static friction of 0.35. What is the maximum force of

allochka39001 [22]

Answer:

The force of static friction is 17.15 N

Explanation:

It is given that,

Mass of the bucket, m = 5 kg

The coefficient of static friction is, $\mu=0.35$

We need to find the maximum force of static friction. It is given by :

$F=\mu mg$

$F=0.35\times 5\ kg\times 9.8\ m/s^2$

F = 17.15 N

So, the force of static friction is 17.15 N. Hence, this is the required solution.

6 0

4 years ago

A<br> 13. Chemical energy is a form of___________<br> energy.

Anestetic [448]

Answer:

Potential energy.

Explanation:

Batteries are a form of chemical energy which is stored in the bonds of molecules contained within the battery acid, batteries are a form of potential energy making chemical potential energy too.

4 0

3 years ago

A wave traveling at 100 m/s has a frequency of 200Hz. What is the wavelength of this wave?

Natalija [7]

The wavelength formula is λ = v/f.
100/200= .5
The wavelength is .5

3 0

3 years ago

Sakena Yacoobi was born in Afghanistan and educated in the United States. She started working with the International Rescue Comm

dolphi86 [110]

Haha it's a not a question

4 0

4 years ago