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larisa86 [58]
3 years ago
8

6. A snowball that will be used to build a snowman is at the top of the only hill in town and weighs 22

Physics
1 answer:
IRINA_888 [86]3 years ago
3 0

Answer:

23.64 m

Explanation:

Potential energy is given by

PE=mgh

Where m us the mass of snowball, g is acceleration due to gravity, h is height.

Also, the weight of an object is given by W=mg hence replacing mg in the above equation with W we obtain

PE=Wh

Making h the subject of the formula then

h=\frac {PE}{W}

Substituting 520 J for PE and 22 N for W then

h=\frac {520J}{22}=23.636363636363m\\h\approx

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MrRa [10]

Answer:

15.34 kVA

Explanation:

A motor is a device that converts electrical energy into mechanical energy. It takes in electrical energy at the input and produce torque (motion) at the output.

The power consumption for a three phase motor is the product of voltage and current and √3. The √3 is because it is a three phase supply.

Hence Power (P) =√3 × voltage (V) × current (I)

P = √3 × V × I

Given that voltage (V) = 460 V, current (I) = 17 A. Hence:

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But 1000 VA = 1 kVA. Hence:

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3 years ago
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Answer:

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