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andreyandreev [35.5K]
3 years ago
6

The weight of air measured in units of force per area is called _____.

Physics
2 answers:
laila [671]3 years ago
8 0
The weight of air measured in units of force per area is called air pressure.
ElenaW [278]3 years ago
8 0

Answer:

B. air pressure

Explanation:

The definition of pressure is that it is a force applied to an area.

P=\frac{F}{A}

Because weight is a force (a force is mass multiplied by acceleration, and weight is the product of the mass of an object multiplied by the acceleration of gravity, thus weight is a force), the measurement of the weight of the air over area is the air pressure.

The correct answe is B.

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For the following elementary reaction 2br• -> br2-. The rate of consumption of the reaction and the rate of formation of prod
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Rate of a reaction is defined as the rate of change of concentration per unit time.

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The rate in terms of reactants is given as negative as the concentration of reactants is decreasing with time whereas the rate in terms of products is given as positive as the concentration of products is increasing with time.

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A 0.560 kg snowball is fired from a cliff 14.2 m high with an initial velocity of 13.3 m/s, directed 26.0° above the horizontal.
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Answer:

a) v = 21.34 m/s

b) v = 21.34 m/s

c) v = 21.34 m/s

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Mass of the snowball, m = 0.560 kg

Height of the cliff, h = 14.2 m

Initial velocity of the ball, u = 13.3 m/s

θ = 26°

The speed of the slow ball as it reaches the ground, v = ?

The initial Kinetic energy of the snow ball, KE_{0}  = 0.5 mu^{2}

Potential energy of the snow ball at the given height, PE = mgh

Final Kinetic energy of the ball as it reaches the ground, KE_{f} = 0.5mv^{2}

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b) The speed remains v = 21.34 m/s since it is not a function of the angle of launch

c)The principle of energy conservation used cancels out the mass of the object, therefore the speed is not dependent on mass

v = 21. 34 m/s

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