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aliina [53]
2 years ago
11

you can make a smoothie in a blender with a power of 400 W and an efficiency of 85% how much energy is actually being used to ma

ke the smoothie in 30 seconds?
Physics
1 answer:
bixtya [17]2 years ago
5 0
1200  watt seconds
1.2.  Kw seconds
1.2/  3600   KWh
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A frequency generator sends a 550Hz sound wave through both water and ice. What is the difference in wavelength between the wave
LUCKY_DIMON [66]

Answer:

3.1

Explanation:

use formula f = v/lambda

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3 years ago
A certain wave has a wavelength of 45.0 meters and a frequency of 9.00 Hz. What is the speed of the wave? 405 m/s 5.00 m/s 0.200
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Wave speed  =  (wavelength)  x  (frequency)

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If some electrons are transferred from object A to object B,
Igoryamba

Answer: A. Object A will have a positive charge.

Explanation: If the number of protons and electrons are the same, their net charges cancel each other out, and you have a neutral charge. If electrons are transferred to another object, the amount of positive charge will outweigh the amount of negative charge. As a result, you are left with an overall positive charge in object A. Meanwhile, object B is now negative.

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2 years ago
The rock and meterstick balance at the 25-cm mark, as shown in the sketch. The meterstick has a mass of 1 kg. What must be the m
liraira [26]

Answer:

<h2>1 kg</h2>

Explanation:

Check the diagram attached below for the diagram.

Let the weight of the rock be W and the mass of the meter stick be M. Note that the mass of the meter stick will be placed at the middle of the meter stick i.e at the 50cm mark

Using the principle of moment to calculate the weight of the rock. It states that the sum of clockwise moments is equal to the sum of anti clockwise moment.

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The meterstick acts in the clockwise direction while the rock acys in the anti clockwise direction

Clockwise moment = 1kg * 25 = 25kg/cm

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