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QveST [7]
2 years ago
6

NEED AN ANSWER FAST PLEASE 70 PTS

Physics
1 answer:
lara [203]2 years ago
4 0

Answer:

0.062

m/s

Explanation:

Quantities:

m

a

=

70

kg

m

o

=

26

kg

v

o

f

=

1

6

m/s

v

a

f

=

?

m/s

v

a

i

=

v

o

i

≡

v

i

m/s

p

a

i

+

p

o

i

=

p

a

f

+

p

o

f

m

a

v

a

i

+

m

o

v

o

i

=

m

a

v

a

f

+

m

o

v

o

f

(

m

a

+

m

o

)

v

i

=

m

a

v

a

f

+

m

o

v

o

f

(

70

+

26

)

v

i

=

(

70

)

v

a

f

+

(

26

)

(

1

6

)

96

v

i

=

70

v

a

f

+

13

3

We can assume that the initial speed of the astronaut is zero for the sake of argument. It says "floating in space", so maybe that actually means 0. The actual initial and final speeds are unimportant, because we are just looking for the change (or difference) in the two speeds.

−

13

3

=

70

v

a

f

v

a

f

=

−

0.062

m/s

This means that the astronauts speed will change by  

0.062

m/s and the astronaut will move in the opposite direction of the object (hence the minus sign).

Explanation:

braineist pls

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The complete question is:

Study the scenario. A firework is ignited, and explodes with a flash and a loud bang as it is blown apart. The system consists of: the firework, the earth, and the air. which choice best describes how energy is transformed in the system?

A) When the firework is ignited, a chemical reaction absorbs energy from the surrounding environment. the energy is in several forms including sound and light, and mechanical energy of the fragments of the firecracker that are launched through the air. Eventually all the energy released is transformed into thermal energy.

B) When the firework is ignited, a chemical reaction releases energy in several forms, including sound, light, and the mechanical energy of the fragments being launched through the air. Eventually all the energy released is transformed into mechanical energy.

C) When the firework is ignited, a chemical reaction releases energy in several forms, including sound, light, and the mechanical energy of the fragments being launched through the air. Eventually all the energy released is transformed into thermal or mechanical energy.

D) When the firework is ignited, a chemical reaction absorbs energy from the surrounding environment. The energy is taken in in several forms including sound and light, and mechanical energy of the fragments being launched through the air. Eventually all the energy is transformed into thermal energy.

Answer:

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Explanation:

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All the sound, light and movement of the debris is as a result of energy transformation from the chemical energy.

Eventually, most of the energy are finally wasted away as heat energy.

Some of the energy is used up by the flying particles from the fireworks.

8 0
3 years ago
1. What are the two quantities involved when calculating MOMENTUM?
Snezhnost [94]

Answer:

Mass and Velocity

Explanation:

Momentum = Mass  X Velocity

or p=m' x v

since in physics p is quantity momentum and m stands for mass and v stands for velocity.

Hope this helps :)

8 0
3 years ago
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