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seraphim [82]
2 years ago
15

A police officer uses a radar gun to determine the speed of a car. A specialized radar gun uses ultraviolet light to determine s

peed. What describes the waves used
Physics
1 answer:
lakkis [162]2 years ago
5 0

Answer:

Radio Waves

Explanation:

Radio wave is a type of electromagnetic radiation notorious for their use in technologies used for communication like air traffic control, mobile phones, televisions and remote-controlled toys. Radio waves have the longest wavelength in the electromagnetic spectrum and are easily transmitted through air.

A radar gun uses radio waves to tell how far away an object is. To do that, the radar tool emits a focused radio wave and listens for any echo. If there is an item, say a car within the route of the radio wave, it's going to replicate some of the electromagnetic energy, and the radio wave will return to the radar gun. Radio waves flow via the air at a steady pace, so the radar gun can calculate how far the object is based totally on how long it takes the radio signal to return.

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Ever wonder what Albert Einstein’s formula E = MC2 means? Don’t worry, your teacher doesn’t really understand that one either, b
Ivahew [28]

Answers are mentioned along with explanations/

Explanation:

1. We are given D = 5R

where D = no. of diamonds and R = no. of rubies

a. In words, Number of diamonds = 5 times no. of rubies

In letters D = 5R

b. Given R = 4, so D = 5 x R = 5x 4

D = 20

c.  Given R = 10 , so D = 5 x R = 5x 10

D = 50

d. Given D = 15 , D = 5R so , R = D/5 = 15/5 = 3

R = 3

e. R = \frac{D}{5}  because D = 5R

2. Given A = B + C

a. B = 5 , C = 2 => A= 5+2 => A= 7

b. B = A - C from above equation and given A = 10 , C = 2 , B= 10 - 2

B = 8

c.  two values of B and C for A to be 7

B = 4 C = 3 and vice versa as 4+3 = 7

d. B = A - C by moving C on the RHS thus changing its prefix sign.

3. Given A = 3x and B = 5x+1

a. B goes up faster because it is 5 times x plus 1 where A is just 3 times x

b. if x = 0, A = 3x = 3x0 = > A = 0

c. if x =1 , B = 5x+1 = 5x1 +1 = 5+1 => B = 6

4. Given A = 2x and B = x2 where x2 means x*x so,

a. if x=1 , A = 2*1 = 2 and B = 1*1 = 1

b. if x = 3, A = 3*1 = 3 and B = 3*3 = 9

5. Given D =2R

a. given R = 8 , D = 2*8 => D=16

b. given R =3 then D = 2*3 => D = 6

c. D= 20 given, R = D/2 = 20/2 => R = 10

d. D = 100 so R = D/2 = 100/2 => R =50

e. R = \frac{D}{2} or D/2

6. Given C = π D and π  = 3.14

a. if D = 20, C = 3.14*20 => C = 62.8 centimeters

b. if D = 10, C = 3.14*10 => C = 31.4 inches

c. Given C = 18, D = C/31.4 = 18/3.14 => D = 5.732 inches

7. Given S = D/T

a. S = 12/3 = 4 feet/seconds

b. S = 100/5 = 20 miles/seconds

c. For S = 4feet per second , D = 8 ft and T = 2 seconds as S = D/T

4 0
2 years ago
Please help with 2,3,5 and 6
Bad White [126]

Auhmm, ms/mr. your question was too blurry

Explanation:

plss can u kinda repost it?

4 0
2 years ago
When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium
Karolina [17]

Answer:

Silver Chloride

Explanation:

A <em>precipitate</em> in chemistry is a substance that becomes solid during a chemical reaction.

Have a great day!

4 0
2 years ago
Calculate the average maximum height for all three trials When the speed of the bottle is 2 m/s, the average
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Answer:

.10

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.87

1.25

1.86

Explanation:

7 0
2 years ago
Read 2 more answers
In order for work to be done, what three things are necessary?
andrey2020 [161]
The three things that are necessary are power, a force, and movement in the opposite direction of the applied force.
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3 years ago
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