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kati45 [8]
3 years ago
7

Joy uses 20n of force to shovel the snow 10 meters. how much work does she do?

Physics
1 answer:
GarryVolchara [31]3 years ago
7 0
Work = Force * distance

Work = 20 N * 10 m = 200 Nm

Work = 200 Joules.
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PLEASE HELP! WILL MARK BRAINLIEST!
Alborosie

Answer:22.22m/s

Explanation:

Answer: 22.22 m/s

Explanation:

Using the law of conservation of momentum:

Initial momentum of the system = final momentum of the system.

mu+m'u' = mv+m'v'

where u and u' are the initial velocities.

v and v' are the final velocities.

mass of bullet, m = 0.04 kg

mass of the block of wood, m' = 0.5 kg

initial velocity of bullet, u = 300 m/s

initial velocity of block, u' = 0

after collision, block and bullet would move together with velocity v

⇒0.04 kg × 300 m/s + 0 = 0.54 kg × v

⇒ v = 22.22 m/s

Thus, the bullet and the wood block move together as one object with the speed 22.2 m/s.

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3 years ago
Scientists in a particular field strive for the same quality of work because they know their peers will be reviewing their scien
aniked [119]

The answer is:

A) sandards of the profession

The explanation:

-peer review is an important part of this process. Peer review is an important part of the quality control mechanism that is used to determine what is published, and what is not.

- In the medical community, most scholarly work or research will not be seriously considered until it has been validated by peer review.

- the peer review process acts as a filter for interest and relevance to the field being targeted by a journal.

8 0
3 years ago
Read 2 more answers
Six moles of an ideal gas are in a cylinder fitted at one end with a movable piston. The initial temperature of the gas is 28.0
mel-nik [20]

Answer:

63.5 °C

Explanation:

The expression for the calculation of work done is shown below as:

w=P\times \Delta V

Where, P is the pressure

\Delta V is the change in volume

Also,

Considering the ideal gas equation as:-

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 8.314 J/ K mol

So,

V=\frac{nRT}{P}

Also, for change in volume at constant pressure, the above equation can be written as;-

\Delta V=\frac{nR\times \Delta T}{P}

So, putting in the expression of the work done, we get that:-

w=P\times \frac{nR\times \Delta T}{P}=nR\times \Delta T

Given, initial temperature = 28.0 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (28.0 + 273.15) K = 301.15 K

W=1770 J

n = 6 moles

So,

1770\ J=6 moles\times 8.314\ J/ Kmol \times (T_2-301.15\ K)

Thus,

T_2=301.15\ K+\frac{1770}{6\times 8.314}\ K

T_2=336.63\ K

The temperature in Celsius = 336.63-273.15 °C = 63.5 °C

<u>The final temperature is:- 63.5 °C</u>

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3 years ago
You are driving your car at a speed of 60 miles per hour, when you cross into Canada. Canada measures their speed in kilometers
Flauer [41]

Answer:

Answer:

I don't know

Explanation:

I don't know

Explanation:

Answer:

I don't know

Explanation:

I don't know

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About how much time elapses between high tides on the same day?
Pani-rosa [81]
There is about 12 hours
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