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algol13
3 years ago
7

After a large snowstorm, you shovel 2,500 kilograms of snow off of your sidewalk in half an hour. You lift

Physics
1 answer:
Delvig [45]3 years ago
3 0
Well, the snow has a total weight G=mg=25,000 N. The work is L=Fd=Gh=1.5*25,000=37,500 J. The power is L/t, where t=1800 seconds. P=37,500/1800=20.833 W.
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What is the mass of an object with a density of 13.5 g/cm3 and a volume of 5cm3?
STatiana [176]
Density d=m/V

mass m=d.V=13.5×5=67.5g

m=67.5g

hope this helps you
7 0
3 years ago
The drawing shows a model for the motion of the human forearm in throwing a dart. Because of the force M applied by the triceps
Serga [27]

Answer:

464.3 N

Explanation:

Given parameters are:

I = 0.065 kg*m^2

L = 0.025 m

R = 0.28 m

v_0 = 0 m/s

v_f = 5 m/s

t = 0.1 s

v_f=v_0+at=at

Hence, a=v_f/t

We must connect two torque equations to find the answer.

\tau=LM=I\alpha

Where \alpha =\frac{a}{R} =\frac{v_f}{Rt}

Hence, LM=I\frac{v_f}{Rt}

Thus, M = \frac{Iv_f}{LRt} = \frac{0.065*5}{0.025*0.28*0.1} =464.3 N

5 0
4 years ago
If a waves frequency is 4Hz, and its wavelength is 5 m, then what is its speed?
hammer [34]

Answer:

speed = 20 m/s

Explanation:

speed = frequency * wavelength

speed = 4 * 5

speed = 20 m/s

6 0
3 years ago
What properties does a loud, shrill whistle have? a.) high amplitude, high frequency
marysya [2.9K]

Answer:

a.) high amplitude, high frequency

Explanation:

Frequency and amplitude are properties of sound. Varying these properties changes how people perceive sound.

While hearing sound of a particular frequency we call it pitch i.e., the perception of a frequency of sound.

High pitch means high frequency and high frequency is perceived to have a shrill sound.

The loudness of a sound is measured by the intensity of sound i.e., the energy the sound possesses per unit area. As the amplitude increases the intensity increases. So, a loud sound will have higher density.

Hence, the loud shrill whistle will have high frequency and high amplitude.

4 0
3 years ago
Please help! this this timed!!!
VMariaS [17]

Answer:

Thermal heat

Explanation:

The water heats up which it means it is thermal (heat/hot)

4 0
3 years ago
Read 2 more answers
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