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Vinvika [58]
4 years ago
6

At normal temperature and pressure, air has

Physics
1 answer:
lisabon 2012 [21]4 years ago
7 0
0.001184 g/mL = 0.001184 x 1000 ml/L x 1/1000 kg/g
= 0.001184 kg/L

Volume of room:
2.84 x 2.27 x 2.71
= 17.47 m³ = 17470 L

Mass of air = density x volume
= 0.001184 x 17470
= 20.7 kg
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Which statement is true about Gram negative organisms?
aliina [53]

Answer:

B, C and D are true.

<h3>Explanation:</h3>

A is false because they appear a pale reddish colour not purple.

3 0
3 years ago
You expend 1000 w of power moving a piano 10 meters in 5 seconds. how much force do you exert
Vinvika [58]

Answer:

Force, F = 500 N

Explanation:

Given that,

Power expanded, P = 1000 W

Distance moved by piano, d = 10 m

Time taken, t = 5 s

To find,

The force exerted by the person

Solution,

The rate at which the work is being done is called power delivered. Its formula is given by:

P=\dfrac{W}{t}

W is the work done, W = F × d

P=\dfrac{Fd}{t}

On rearranging the above formula to find F as :

F=\dfrac{P t}{d}

F=\dfrac{1000\times 5}{10}

F = 500 N

Therefore, the force exerted on the person is 500 N. Hence, this is the required solution.

7 0
3 years ago
A car of mass 1200kg moving 90km/hr is brought to rest over a distance of 20m. calculate breaking force.​
patriot [66]

Answer:

-18,750N

Explanation:

90x1000

-------------

3600

u=25m/s

v=0m/s

v^2=u^2+2as

v=0

=625+(2×a×20)

625+40a

-625=40a

a= -15.625 m/s^2

F=ma

=(1200)(-15.625)

= -18,750N

4 0
2 years ago
Which microscope is used to see internal structures of cells in a natural state? darkfield microscope phase-contrast microscope
harkovskaia [24]

Answer:

Phase contrast microscope

Explanation:

It is used for viewing biological structures not visible under the microscope. It is used for viewing microrganisms live

8 0
4 years ago
3. Infiltration is the process by which rainwater becomes
amid [387]
<em></em>Your answer is :<em>

A.
</em>
Groundwater.<em>

</em>
4 0
4 years ago
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