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Mazyrski [523]
3 years ago
13

A person holds a portable fire extinguisher that ejects 1.0kg of water per second horizontally at a speed of 6.0 m/s. What newto

ns must the person exert on the extinguisher in order to prevent it from accelerating?
(A) 0N
(B) 6N
(C) I0N
(D) 18N
(E) 36N
Physics
1 answer:
Leviafan [203]3 years ago
7 0

Answer:

6 N

Explanation:

\dfrac{m}{t} = Mass flow rate = 1 kg/s

v = Final velocity = 6 m/s

u = Initial velocity = 0 m/s

Force is obtained when we divide change in momentum by time

F=\dfrac{m(v-u)}{t}\\\Rightarrow F=\dfrac{m}{t}(v-u)\\\Rightarrow F=1(6-0)\\\Rightarrow F=6\ N

The force the person exert on the extinguisher in order to prevent it from accelerating is 6 N

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Answer:

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Find the acceleration of a hamster when it increases its velocity from rest to 8.0 m/s in 3.0 s .
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<span>Acceleration is the change in velocity divided by time.
We can find acceleration a, by the following formula

a=v-u/t

where,
v is the final velocity (in this question v=8.0 m/s)
u is the initial velocity (since the hamster starts from rest, u=0)
t is the time taken (i,e 3.0 second)
now by applying the formula we have,

a = 8.0 - 0 / 3
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The acceleration is 2.65 meters per second squared</span>
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3 years ago
You are riding on a Ferris wheel that is rotating with constant speed. The car in which you are riding always maintains its corr
nirvana33 [79]
It's going down.

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5 0
3 years ago
The sun is to solar energy as uranium is to ______ energy
nadya68 [22]

Explanation:

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Answer:

option B

Explanation:

The correct answer is option B

the mineral which is pinkish and light in color with wavy lines is potassium feldspar .                                                      

pyroxene is a mineral is typically dark in color generally it's color is  dark green.                                                                  

amphibole is also dark in color an is in green color.

olivine is a mineral which is in olive green color.

Quartz is a mineral which is light colored and it is also pink in color but it does not have wavy line.

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3 years ago
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