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3 years ago

14

-8. A vessel is filled with a 20cm of water. When an irregular body of mass 800gm is immersed the volume of water is increased t

o 60cm3. What is the density of irregular shaped body?

1 answer:

Crazy boy [7]3 years ago

3 0

Answer:

13.33 g/cm3

Explanation:

density = mass/volume

mass of irregular body = 800 grams

new volume = 60 cube cm

= density = 800/60 = 13.333 g/cm3

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What are examples of newton's 3 law

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An object is dropped from a platform100 ft high. Ignoring wind resistance, what will its speed be when it reaches the ground?

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Answer:

80 ft/s

Explanation:

Given:

Δy = 100 ft

v₀ = 0 ft/s

a = 32.2 ft/s²

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3 years ago

A 375-g stone hangs from a thin light string that is wrapped around the circumference of a pulley with a moment of inertia of 0.

Monica [59]

Answer:

The magnitude of the acceleration of the stone is 19.87 m/s²

Explanation:

Given;

mass of stone, m = 375 g = 0.375 kg

moment of inertia, I = 0.0125 kg.m²

radius of the pulley, r = 26 cm = 0.26 m

Torque generated by the pulley on the stone is given as;

τ = F x r = Iα

where;

F is applied force on the stone due to its weight

r is the radius of the pulley

I is moment of inertia

α is angular acceleration (rad/s²)

Force, F = mg = 0.375 x 9.8 = 3.675 N

Torque, τ = F x r

τ = 3.675 x 0.26

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τ = Iα

Angular acceleration, α = τ / I

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Finally, determine linear acceleration, a, in m/s²

a = αr

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a = 19.87 m/s²

Therefore, the magnitude of the acceleration of the stone is 19.87 m/s²

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3 years ago

A typical running track is an oval with 74-m-diameter half circles at each end. A runner going once around the track covers a di

nirvana33 [79]

Answer:

The acceleration towards the center will be $0.43\ m/s^2$

Explanation:

Given the running track is an oval shape, and the diameter of each half-circle is 74 meters.

Also, the runner took 1 minute and 40 seconds to complete 400 m one round of the track.

We need to find the acceleration towards the center.

First, we will find the speed.

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Where $v$ is the speed.

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$t$ is the time taken by the rider to complete the lap which is 1 minute and 40 seconds. $(60\ s +40\ s) = 100$ seconds.

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And

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Hence, the radius will be 37 meters.

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3 years ago