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Mamont248 [21]
4 years ago
14

An object has a. Kinetic energy of 17j and a mass of 27 kg, how fast is the object moving?

Physics
1 answer:
kolezko [41]4 years ago
4 0

Answer:

1.1 m/s

Explanation:

W = (mv^2)/2

W = 17J

m= 27kg

v = \sqrt{\frac{2W}{m} }=  \sqrt{\frac{2*17}{27} }  ≈ 1.1 m/s

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Vika [28.1K]

Answer:

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what they said is correct

4 0
3 years ago
An AC generator supplies 230 V peak voltage at 210 Hz frequency. How much power is dissipated in a resistor with R = 225 Ω resis
sesenic [268]

Answer:

The power dissipated in a resistor is 117.54 watts.

Explanation:

Given that,

Peak voltage of the Ac generator, V = 230 V

Frequency, f = 210 Hz

Resistance, R = 225 ohms

We need to find the power dissipated in a resistor. The power generated is given by :

P=\dfrac{V^2_{rms}}{R}

V_{rms}=\dfrac{V}{\sqrt{2} }\\\\V_{rms}=\dfrac{230}{\sqrt{2} } \\\\V_{rms}=162.63\ V

So,

P=\dfrac{162.63^2}{225}\\\\P=117.54\ W

So, the power dissipated in a resistor is 117.54 watts. Hence, this is the required solution.

7 0
3 years ago
4. Which of the following would be a good reference point to describe the motion of a dog?
saul85 [17]

ANOTHER RUNNING DOG

Explanation:

In the given question it is to find a suitable reference point to describe  the motion of dog. Here I could suggest that it is better to compare the dog with  another running dog to create the relative speed difference to get a reliable motion variation.

Because the motion of dog is in the linear with respect to the another dog and to the acceleration produced by the dog in the required interval is easy to calculate with respect to  another dog which is already in motion.

Hence, I suggest that Motion of dog can be analysed better by analyse the motion variation of dog with  another dog running.

4 0
3 years ago
The spiral review which of the following represents 7 + 7 + 7+7
velikii [3]
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3 0
4 years ago
B) Write the name of the devices<br>which are shown in the given<br>figures and write their uses​
Katena32 [7]

Answer:

transparent Prism

Explanation:

The device shown is a prism. It is used to study the refraction of light according with its wavelength as it transverses from a medium (air for example) to another (either glass, fluorite, plastic), and vice versa.

For that reason is also used to separate white light into its spectral wavelength components.

3 0
3 years ago
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