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Aleks [24]
3 years ago
5

Evan drew a diagram to illustrate radiation.

Physics
1 answer:
Vesna [10]3 years ago
8 0

The correct answer is:

D. Electromagnetic waves.

The arrows represent electromagnetic waves.

|Huntrw6|

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You accidentally drop a book out of the window of a tall building. Assuming
Anettt [7]

Answer:

very fast

Explanation:

gravity

7 0
3 years ago
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A car moving at 10.0 m/s encounters a depression in the road that has a circular cross-section with a radius of 30.0 m. What is
Dennis_Churaev [7]

Answer:

F = 789 Newton

Explanation:

Given that,

Speed of the car, v = 10 m/s

Radius of circular path, r = 30 m

Mass of the passenger, m = 60 kg

To find :

The normal force exerted by the seat of the car when the it is at the bottom of the depression.

Solution,

Normal force acting on the car at the bottom of the depression is the sum of centripetal force and its weight.

N=mg+\dfrac{mv^2}{r}

N=m(g+\dfrac{v^2}{r})

N=60\times (9.81+\dfrac{(10)^2}{30})

N = 788.6 Newton

N = 789 Newton

So, the normal force exerted by the seat of the car is 789 Newton.

6 0
3 years ago
Would you hear an echo if you shouted in your bedroom? Explain your answer.
nasty-shy [4]

Answer:

no you would not hear an echo if you shouted in your bedroom

Explanation:

Echo is a sound produced when the original sound is reflected by walls of a given room. ... So for the case of a bedroom, no echo is produced because there are stuff and the furniture block the sound from reaching the wall hence no bouncing back of sound.

so sorry if i'm wrong :)

6 0
3 years ago
The goal is to increase the power; therefore, it is necessary to
Mnenie [13.5K]
Decrease the work being done and decrease the time in which the work is to be completed.
6 0
3 years ago
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Nicholas sends 20.0 minutes ironing shirts with his 1800-watt irn . How many joules of energy were usedby the iron
Nuetrik [128]
1 watt = 1 joule/sec
1800 watts = 1800 joules/sec

                 (1800 J/sec) x (20 min) x (60 sec/min)

             =  (1800 x 20 x 60) joules  =  2,160,000 joules .

                                                             ( 2.16 megajoules )
6 0
3 years ago
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