4 years ago

If an item as a density of.63 g/mL, when placed in water the item will

Physics

1 answer:

sergij07 [2.7K]4 years ago

5 0

Float. This is because water has a density of 1 g/ml, so anything less than this will float.

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A turbine blade rotates with angular velocity ω(t) = 2.00 rad/s- 2.1.00 rad/s3 t2. What is the angular acceleration of the blade

STatiana [176]

Answer:

$\alpha =-38.22\ rad/s^2$

Explanation:

given,

ω(t) = 2.00 rad/s- 2.1.00 rad/s³ t²

angular acceleration of the blade at t= 9.10 s

$\alpha =\dfrac{d\omega}{dt}$

$\alpha =\dfrac{d}{dt}(2 - 2.1 t^2)$

$\alpha =-2 \times 2.1 t$

$\alpha =-4.2 t$

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$\alpha =-4.2\times 9.10$

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3 years ago

A circular ride has a radius of 32 m If the time of one revolution of a rider is 0.98 s what is the speed of the rider?

11111nata11111 [884]

Given that,

The radius of a circular path, r = 32 m

The time of one revolution of a rider is 0.98 s.

To find,

The speed of the rider.

Solution,

Let v is the speed of the rider. Speed is equal to total distance divided by time taken.

$v=\dfrac{2\pi r}{t}\\\\v=\dfrac{2\pi \times 32}{0.98}\\\\v=205.16\ m/s$

So, the speed of the rider is 205.16 m/s.

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Greatest to least 56.2,56.32,56.321

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56.321, 56.32, 56.2 is the answer

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