3 years ago

PLEASE ANSWER! WILL MARK BRAINLIEST!

Physics

1 answer:

Angelina_Jolie [31]3 years ago

8 0

The first one would be thermal energy

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You hang a heavy ball with a mass of 94 kg from a platinum rod 3.2 m long by 2.2 mm by 3.1 mm. You measure the stretch of the ro

vlada-n [284]

Answer:

$1.67\times 10^{11} N/m^2$

Explanation:

Mass of the ball, $m=94 kg$

Force = weight of the ball

$F=mg = 94kg\times 9.81 m/s^2=922.14N$

For Young's modulus, substitute the values in the formula which is as follows:

$\frac{F}{A}=Y\frac{\Delta L}{L}\\\Rightarrow Y= \frac{FL}{A\Delta L}\\\Rightarrow Y =\frac{922.14 \times 3.2}{2.2\times 10^{-3}\times 3.1\times 10^{-3} \times 0.002588}=1.67\times 10^{11} N/m^2$

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3 years ago

Please help 1-9 15 points

Serjik [45]

Answer:

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Explanation:

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3 years ago

What is the force acting on an object of mass 10 kg moving with a uinform velocity of 10 m/s ?

Rus_ich [418]

If its uniform there is no force.

C) 0 N

8 0

3 years ago

IgorC [24]

Answer:

Speed = 300 m/s

Explanation:

Given the following data;

Frequency = 30 Hz

Wavelength = 10 m

To find the speed of the wave;

Mathematically, the speed of a wave is given by the formula:

$Speed = wavelength * frequency$

Substituting into the formula, we have;

$Speed = 10 * 30$

Speed = 300 m/s

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3 years ago

An electric heater draws 13 amperes of current when connected to 120 volts. If the price of electricity is $0.10/kWh, what would

alexandr402 [8]

Answer:

C $0.75 my friend I wish it is right answer

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4 years ago