1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PolarNik [594]
3 years ago
14

you’ve just been involved in a traffic accident that leaves you stranded on the side of the road. Which part of the EM spectrum

would be of the most use to you and why?
Physics
1 answer:
Akimi4 [234]3 years ago
4 0

You’ve just been involved in a traffic accident that leaves you stranded on the side of the road. <u>Microwaves from the EM spectrum would be of the most use.</u>

<u></u>

Explanation:

  • Microwaves are a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter, with frequencies between 300 MHz and 300 GHz.
  • Microwaves have a range of applications, including communications, radar and, perhaps best known by most people, cooking
  • Microwave is a line-of-sight wireless communication technology that uses high frequency beams of radio waves to provide high speed wireless connections that can send and receive voice, video, and data information.
  • Microwaves and radio waves are used to communicate with satellites.
  • Microwaves pass straight through the atmosphere and are suitable for communicating with distant geostationary satellites, while radio waves are suitable for communicating with satellites in low orbit.
  • Microwaves are widely used in modern technology, <u>for example</u> : in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, etc
You might be interested in
Hey guys how to prevent from shock
Pie
U need an insulator to prevent the shock passing through , that's why there is a plastic sheet covering the copper wires so that it can prevent the electricity passing through as plastic is an insulator and does not conduct electricity
8 0
3 years ago
What is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.13?
IgorLugansk [536]

Let us assume that pulley is mass less.

Let the tension produced at both ends of the pulley is T.

We are asked to calculate the acceleration of the block.

Let the masses of two bodies are denoted as m_{1} \ and\ m_{2}\ respectively

Let\ m_{1} =1 kg\ and\ m_{2} =2 kg

As per this diagram, the body having mass 1 kg is moving downward and the body having mass 2 kg is moving on the surface of the table.

Let the acceleration of each block is a .

For body having mass 1 kg:

The net force acting on 1 kg body will be-

                             m_{1} g-T=m_{1} a        [1]

Here tension in the rope will be vertically upward and weight of the body will be in vertical downward direction.

For body having mass 2 kg:

The coefficient of kinetic friction [\mu]=0.13

Hence\ the\ frictional\ force\ F=\mu N

                                                     F=\mu m_{2} g

Hence the net force acting on the body having mass 2 kg-

                                  T-\mu m_{2} g=m_{2} a  [2]

Here the tension of the rope is towards right i.e along the direction of motion of the 2 kg block and frictional force is towards left.

Combining 1 and 2 we get-

                           m_{1} g-T=m_{1}a             [1]

                           T-\mu m_{2}g= m_{2} a   [2]

                           ---------------------------------------------------

                           [m_{1} -\mu m_{2} ]g=[m_{1} +m_{2} ]a

                           a=\frac{m_{1}-\mu m_{2}} {m_{1}+ m_{2}}*g

                           a=\frac{1-[2*0.13]}{1+2} *9.8\ m/s^2

                           a=\frac{0.74}{3} *9.8\ m/s^2

                           a=2.417 m/s         [ans]

6 0
3 years ago
Read 2 more answers
An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is t
lana [24]

Answer:

Equal to the weight of the object

Explanation:

There are two forces acting on the object hanging on the string:

- The tension in the string, T, acting upward

- The weight of the object, mg, acting downward

We can write Newton's second law as:

T-mg=ma

where a is the acceleration of the object.

Here we are told that the elevator is moving at constant speed: this means that the acceleration of the object is zero, therefore a = 0 and the equation becomes

T=mg

therefore, the tension in the string is equal to the weight of the object.

7 0
3 years ago
A 16.9 kg monkey is swinging on a
mrs_skeptik [129]

The potential energy of the monkey at the given position is 600.9 J.

<h3>What is potential energy?</h3>

Potential energy is the energy stored in a body that depends upon the relative position of various parts of the body.

It increases with increase in the height of the object above the ground level.

<h3>Potential energy of the monkey</h3>

The potential energy of the monkey is calculated as follows;

P.E = mgh

P.E = mg (L sin43)

where;

  • m is mass of the monkey, given as 16.9 kg
  • g is acceleration due to gravity, given as 9.8 m/s²
  • L is length of the vine given as 5.32 m

Substitute the given parameters and solve potential energy of the monkey

P.E = (16.9)(9.8)( 5.32 x sin 43)

P.E = 600.9 J

Thus, the potential energy of the monkey at the given position is 600.9 J.

Learn more about potential energy here: brainly.com/question/1242059

#SPJ1

5 0
1 year ago
Physics A-Level, both of these questions
podryga [215]
I can only help you with question 7
B is the right answer.
A is wrong because when the angle is critical angle the light leaves medium 1 parallel to the surface.
C is wrong because light reflects only when travelling from a denser to a rarer/less dense medium.speed of light is lower in denser medium.
D is wrong because the frequency of the light doesn't change when travelling from one medium to another.
8 0
2 years ago
Other questions:
  • In an electrolytic cell, to which electrode will a positive ion migrate and undergo reduction? the anode, which is negatively ch
    7·2 answers
  • A particle moves at a constant speed of 34 m/s in a circular path of radius 6.3 m. From this information, what can be calculated
    7·1 answer
  • A 1-kilogram parcel of air is at 35°c and contains 7 grams of water vapor. What is the relative humidity?
    15·1 answer
  • A ball is thrown into the air with 100 J of kinetic energy, which is transformed to gravitational potential energy
    10·1 answer
  • a ball is thrown horizontally from the roof of a building 45m tall and lands 24m from the base what is the initial speed?
    11·1 answer
  • Please help me with a speech.The topic of my speech is Passion.​
    5·1 answer
  • Question in picture, just want to confirm answer.<br> Is the answer B?
    5·1 answer
  • Which type radiation can be observed well from Earth's surface?
    10·2 answers
  • A 6kg rock rolls down a hill with a momentum of 12kg m/s . Work out the velocity of the rock
    8·2 answers
  • How is it technically correct to say that a car making a u-turn can have a constant speed but cannot have a constant velocity?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!