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Natalka [10]
3 years ago
6

What is the force of friction between the dragsters tires and the track if the dragster mass is 300kg and the coefficient of the

friction force is 0.8
Physics
1 answer:
Nuetrik [128]3 years ago
7 0

Ff=μN=μmg=0.8*300*10=2400 N

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On the modern periodic table, elements are ordered according to what?
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The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

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Calculate the most probable speed of an ozone molecule in the stratosphere
Marysya12 [62]

Answer:

v_{mp}=305.83 m/s

Explanation:

The temperature in stratosphere is generally about 270 K

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now formula for most probable velocity

v_{mp}= \sqrt{\frac{2RT}{M} }

plugging the values we get

v_{mp}= \sqrt{\frac{2\8.314\times270}{48} }

v_{mp}=305.83 m/s

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3 years ago
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The brick wall (of thermal conductivity 0.35 W/m ·◦ C) of a building has dimensions of 2.7 m by 6 m and is 16 cm thick. How much
Gwar [14]

Answer:

Q = 54.577\,MJ

Explanation:

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\dot Q = \frac{k\cdot A}{L}\cdot \Delta T

\dot Q = \frac{\left(0.35\,\frac{W}{m\cdot ^{\circ}C} \right)\cdot (2.7\,m)\cdot (6\,m)}{0.16\,m} \cdot (31^{\circ}C - 8^{\circ}C)

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The heat flow in a 18.6-h period is:

Q = \dot Q \cdot \Delta t

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Q = 54576618.48\,J

Q = 54.577\,MJ

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