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attashe74 [19]
3 years ago
6

An astronaut is moving in space when a big explosion occurs about 50 metres BEHIND him. How will the astronaut come to know abou

t the explosion?
Physics
2 answers:
kakasveta [241]3 years ago
6 0
The matter from the explosion can reach him, hitting him. He should be able to feel that.
kap26 [50]3 years ago
5 0

Answer:

The particles from the explosion will hit him, create holes in his space suit, and can also hurt him. By feeling all these things, he will know about the explosion.

Explanation:

Explosion happened behind him so, he wouldn’t be able to see it. Moreover, Sound needs a medium to travel but, in space there is no medium. So, we would not able to listen the sound of explosion. Hence, he will feel the explosion when particles from explosion will hit him and hurt him.

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Please help me to do this problem
Novosadov [1.4K]

Answer:

we got time and velocity over time.

so the distance is again the area underneath the graph

for a triangle with known base and height it's

4*10 / 2

distance traveled is 20

deceleration occurs when velocity decreases. that happens from t=2 till t=4

in 2 time-units we loose 10 units of velocity, so we decelerate by 5 units per 1 time

a (from t=2 to t=4) = -5v/t

7 0
3 years ago
What is the current in a 160V circuit if the resistance is 2Ω?<br> V=<br> I=<br> R=
Alex787 [66]

Explanation:

v = IR

v= 160 R = 2

<u>160</u> = <u>2I</u>

2 2

I = 80A

4 0
2 years ago
2. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class for the third time this wee
Alex17521 [72]

Answer:

  • 62 seconds
  • no

Explanation:

The total travel time Suzette experiences is the sum of the times in each hallway. Using

  time = distance/speed

we can add the times.

  (35.0 m)/(3.50 m/s) +(48.0 m)/(1.20 m/s) +(60 m)/(5.0 m/s)

  = 10 s + 40 s + 12 s

  = 62 s

It takes Suzette 62 seconds to get to class. She does not beat the bell.

3 0
3 years ago
How should the student change the circuit to give negative values for current and
dmitriy555 [2]

Answer:

Flip the cell.

Explanation:

This reverses direction of energy transfer.

Alternatively, flip ammeters and voltmeters to give negative readings.

what do penguins eat for lunch?

Ice-burgers!

3 0
2 years ago
A mercury thermometer is used to measure the temperature of boiling water but why do you think the mountainous travel to cold re
melamori03 [73]

Because mercury freeze in cold temperatures

7 0
2 years ago
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