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2 years ago

A mass on a string is swung in a circle of radius 0.75m at 7.0m/s.what its rate of acceleration.

Physics

1 answer:

Ulleksa [173]2 years ago

3 0

Explanation:

ac = v^2/r

= (7.0 m/s)^2/(0.75 m)

= 65 m/s^2

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A helium weather balloon is filled to a volume of 219 m3 on the ground, where the pressure is 754 torr and the temperature is 29

Novosadov [1.4K]

Answer:

$V_2 = 606.9 m^3$

Explanation:

By ideal gas equation law we know that

PV = nRT

now we know that when balloon rises to certain level then the number of moles will remains same

so we can say

$n_1 = n_2$

$\frac{P_1V_1}{RT_1} = \frac{P_2V_2}{RT_2}$

now plug in all data to find the final volume of the balloon

$\frac{754\times 219}{R(298)} = \frac{210 \times V_2}{R(230)}$

$V_2 = \frac{230\times 754 \times 219}{210 \times 298}$

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2 years ago

Suppose you have a dipole that's free to move in any way (including rotate - imagine it floating in space). And there's an objec

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Complete Question

The complete question shown on the first uploaded image

Answer:

The force on Q due to dipole is Attractive

The charge Q exerts attractive force on the dipole

Yes from the above parts, force depends on the sign of charge

$F = kQq[\frac{d^{2}+2rd}{r^{2}(d+r)^{2}} ]$

The magnitude o force decrease by a factor of 8.0 times

Explanation:

The explanation is shown on the second uploaded image

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2 years ago

VMariaS [17]

Answer:

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2 years ago

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A ruler has a division of 1mm. You use the ruler to measure a piece of paper. You find that it is 7.4 cm wide and 8.3 cm long. W

Anastaziya [24]

Answer:

Explanation:

Given the dimension of a paper measured by a ruler as 7.4 cm wide and 8.3 cm long, the area of the paper is expressed using the area for calculating the area of a rectangle as shown;

Area of the piece of paper = Length * Width

Given length = 7.4cm

Length = 74mm (Since 10mm = 1cm)

Width = 8.3cm

Width (in mm) = 83mm

We converted to mm since the ruler used to measure has a division of 1mm.

Substituting the given values into the formula, we will have:

Area of the piece of paper = 74mm * 83mm

Area of the piece of paper = 6,142mm²

<em>Hence, the area of the piece of paper is 6,142mm²</em>

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2 years ago

For horizontally-launched projectiles, which of the following describes acceleration in both directions with a = 0 and a = -9.8m

natulia [17]

Answer:

4 is the best option for it as there are some stuff in grade to ye

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2 years ago

A mass on a string is swung in a circle of radius 0.75m at 7.0m/s.what its rate of acceleration.​

A mass on a string is swung in a circle of radius 0.75m at 7.0m/s.what its rate of acceleration.