3 years ago

If a 60-g object has a volume of 30 cm", what is its density?

Physics

1 answer:

alisha [4.7K]3 years ago

5 0

Answer:

Density = Mass/volume. D= 60/30.Divide it and you'll get ur answer as 2

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One watt is A. equal to one kilogram per second B. the power that can be delivered by an average horse C. the same as one-foot p

Naddik [55]

Answer:

D. the proper replacement unit for one joule per second

Explanation:

When energy is divided by the time the energy was used we get power

$P=\dfrac{E}{t}\\\Rightarrow P=\dfrac{mv^2}{t}\\\Rightarrow P=\dfrac{kg(\dfrac{m^2}{s^2})}{s}\\\Rightarrow P=kg(\dfrac{m^2}{s^2})}\times \dfrac{1}{s}\\\Rightarrow P=\dfrac{kgm^2}{s^3}$

$kg\dfrac{m^2}{s^2}=Joule$

$P=\dfrac{kgm^2}{s^3}$

So, the answer is D. the proper replacement unit for one joule per second

8 0

3 years ago

A 300 N force acts on a 25 kg object. The acceleration of the object is?

storchak [24]

Acceleration is F/M so the answer would be 12m/s^2

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3 years ago

Read 2 more answers

Explain why total internal reflection has make communication much faster through the use of fibre optic

Inessa05 [86]

Answer:

Due to total internal reflection lose of imformation is almost none in optic fibre. Less time is required to transmit the imformation.

Explanation:

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3 years ago

A heavy ball with a weight of 150 N is hung from the ceiling of a lecture hall on a 4.1-m-long rope. The ball is pulled to one s

AlladinOne [14]

Answer:

The tension in the rope is 262.88 N

Explanation:

Given:

Weight $W = 150$ N

Length of rope $r = 4.1$ m

Initial speed of ball $v = 5.5 \frac{m}{s}$

For finding the tension in the rope,

First find the mass of rod,

$mg = 150$ ( $g = 9.8 \frac{m}{s^{2} }$ )

$m = \frac{150}{9.8}$

$m = 15.3$ kg

Tension in the rope is,

$T = mg + \frac{mv^{2} }{r}$

$T = 150 + \frac{15.3 \times (5.5)^{2} }{4.1}$

$T = 262.88$ N

Therefore, the tension in the rope is 262.88 N

7 0

3 years ago

What is the frequency of a sound wave having a velocity of 341 meters/second and a wavelength of 0.8 meters?

ololo11 [35]

Velocity=frequency/wavelength
frequency=velocity*<span>wavelength
</span>f=341*0.8
f=272.8 Hz

7 0

4 years ago