3 years ago

Name of the instrument to measure atmospheric pressure ?

Physics

1 answer:

Mrrafil [7]3 years ago

5 0

The instrument would be a barometer.

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6. If two objects experience the same net force, but they have different masses, which object will accelerate at

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i would say the heavier object

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How does the Doppler effect cause a siren's pitch to increase as it

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Sound waves are pushed closer together, decreasing wavelength

and increasing frequency.

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A capacitor consists of two square plates, 8.7 cm on a side, separated by a 2.0 mm air gap. How much energy would be stored in t

slavikrds [6]

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122.84 J

Explanation:

Since plate is square, area, A is given by $(8.7/100)^{2}=0.007569m^{2}$

The distance between plates, d, is given in the question as 2mm=0.002m

Charge on plate, Q, as given in the question is 240 $\mu c$

Assuming mica dielectric constant, k of 7

Capacitance, C is given by

C= $\frac {k\epsilon_{o}A}{d}=\frac {(7)(8.85*10^{-12})(0.007569)}{0.002}=2.34*10*^{-10}F$

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Therefore, the stored energy is 122.84 J

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2 years ago

If your car runs out of gas and you must push it 250 m to the nearest gas station. How much work is done on the car if it is pus

tankabanditka [31]

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1750 Joules.

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2 years ago

A student is holding a stone at a certain height. The stone has 50 joules of potential energy and 0 joules of kinetic energy. Th

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d) The stone will have about 50 joules of kinetic energy and 0 joules of potential energy .

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Given :

Initial Potential energy , $P_i=50\ J$ .

Initial Kinetic energy , $K_i=0\ J$ . ( because ball is in rest )

Now , we know , kinetic energy is maximum when an object reaches ground .

Also , potential energy is zero when an object is in ground .

We know , by conservation of energy :

Initial total energy = Final total energy

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Therefore , option d) is correct .

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3 years ago