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kobusy [5.1K]
3 years ago
12

Atmospheric pressure decreases with increment in height. give reason​

Physics
2 answers:
natulia [17]3 years ago
8 0

Answer:

this is because as the altitude increases the number of air molecules decreases

jekas [21]3 years ago
7 0

Answer:

pressure=height × density×acc due to gravity

so

pressire is directly proportional to height hence it decreses with decrease in height

here air column height is measured upside down so decreases witn increment

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A worker drives a 0.562 kg spike into a rail tie with a 2.26 kg sledgehammer. The hammer hits the spike with a speed of 64.4 m/s
zubka84 [21]

Answer:

Explanation:

Given that,

Mass of sledge hammer;

Mh =2.26 kg

Hammer speed;

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K.E(hammer) = ½ × 2.26 × 64.4²

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If one forth of the kinetic energy is converted into internal energy, then

ΔU = ¼ × K.E(hammer)

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∆U = 1171.63 J

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3 years ago
If you had a planet to choose from to live in what would it be?
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A chair of weight 70.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F =
Annette [7]

Answer:

94.67 N

Explanation:

Consider a free body diagram with force, F of 41 N applied at an angle of 37 degrees while the weight acts downwards. Resolving the force into vertical and horizontal components, we obtain a free body diagram attached.

At equilibrium, normal reaction is equal to the sum of the weight and the vertical component of the force applied. Applying the condition of equilibrium along the vertical direction.  

\begin{array}{l}\\\Sigma {F_y} = 0\\\\N - W - F\sin \theta = 0\\\\N = W + F\sin \theta \\\end{array}

Substituting 70 N for W, 41 N for F and \theta for 37 degrees

N=70+41sin37=94.67441595  N and rounding off to 2 decimal places

N=94.67 N

​

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4 years ago
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