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NARA [144]
3 years ago
13

Calculate 2 x 10^-3cm ÷ 2.5 x 10^4cm

Physics
1 answer:
Mamont248 [21]3 years ago
3 0
Here is your answer:

First find the notations:

2×10^-3
=0002
And...
2.5×10^4=25000

Then divide:

0002÷25000=8E-9

Your answer:
=8 x 10-8
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3 years ago
How much force is needed to accelerate a toy car of mass 8 kg at 2m/s
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Answer:

4N

Explanation:

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3 years ago
A cylinder with a piston contains 0.250 mol of oxygen at2.40x105 Pa and 355 K. The oxygen may be treated as an ideal gas.The gas
Nikitich [7]

Answer:

= 285 Joules

Explanation:

a) answer can be found out in attachment

(b) The temperature for the isothermal compression is the same as the temp at the end of the isobaric expansion. Since pressure is held constant but volume doubles, we use the ideal gas law:

p V = nR T          to see that the temperature also doubles.

.So...   temp for isothermal compression =   355×2 = 710 K

.(c)   The max pressure occurs at the top point. At this point, the volume is back to the original value but the temperature is twice the original value. So the pressure at this point is twice the original, or

max pressure = 2×240000 Pa =  480000 Pa  =   4.80 x 10^5 Pa

(d) total work done by the piston = workdone during isothermal compression - work done during expansion =

=  nRT ln(V initial / V final)-p (V initial - V final)

=   nRT ln(2) - nR(T final - T initial)  

= 0.250× 8.314 ×710×ln(2)-0.250×8.314× (710 - 355)

=     285 Joules

7 0
3 years ago
What is the average speed of a bowling ball that travels a distance of 5.0 m in 2.58 seconds?
Gre4nikov [31]

Answer:

<em><u>1</u></em><em><u>.</u></em><em><u>9</u></em><em><u>4</u></em><em><u> </u></em><em><u>m</u></em><em><u>/</u></em><em><u>s</u></em><em><u> </u></em><em><u>(</u></em><em><u>2</u></em><em><u>d</u></em><em><u>p</u></em><em><u>)</u></em>

Explanation:

Speed= Distance/Time

5.0/2.58 = 1.937984496

= <em><u>1.94</u></em> m/s (<em><u>2dp</u></em>)

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bagirrra123 [75]
Is the first option (hope so)
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2 years ago
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