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3 years ago

A water wheel is a example of

Physics

1 answer:

Kisachek [45]3 years ago

8 0

a machine for converting the energy of falling water into useful forms of power and it is also known as a watermill

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If your front lawn is 16.016.0 feet wide and 20.020.0 feet long, and each square foot of lawn accumulates 13501350 new snowflake

asambeis [7]

Answer:

The mass of snow accumulated in the lawn in 1 hour equals 57.024 kilograms

Explanation:

Given

Width of lawn = 16 feet

Length of lawn = 20 feet

Thus total area of lawn equals $16\times 20=320sq.feet$ \

Now it is given that 1 square foot accumulates 1350 new snowflakes each minute thus number of snowflakes accumulated by 320 square feet in 1 minute equals

$320\times 1350=432000$

Now it is given that average mass of each snowflake is $2.20mg=2.20\times 10^{-3}g=2.20\times 10^{-6}kg$

Hence the mass accumulated per minute equals $432000\times 2.20\times 10^{-6}=0.9504kg$

Now since there are 60 minutes in 1 hour thus the mass accumulated in 1 hour equals $0.9504kg\times 60=57.024kg$

4 0

3 years ago

A vinyl record is played by rotating the record so that an approximately circular groove in the vinyl slides under a stylus. Bum

Fed [463]

Answer:

983.400345675 hits per second

Explanation:

Radius = 14.2 cm

Record turn rate = 33 rev/min

Bump separation = 0.499 mm

Circumference of the record = $2\pi 0.142=0.89221231362\ m$

Number of bumps in the groove = $\dfrac{0.89221231362}{0.499\times 10^{-3}}=1788.0006285\ bumps$

The rate which the bumps hit the stylus = $33\times\dfrac{1788.0006285}{60}=983.400345675$

The rate at which the bumps hit the stylus 983.400345675 hits per second

8 0

3 years ago

A scientist studies a model of a widely accepted theory about the universe.the model would most likely help the scientist to

Marrrta [24]

Answer:

D try that answer if it's not correct try A

Explanation:

3 0

3 years ago

Read 2 more answers

State the laws of vibration of a stringed Instrument

olchik [2.2K]

If the length and linear density are constant, the frequency is directly proportional to the square root of the tension.

7 0

3 years ago

A circular copper loop is placed perpendicular to a uniform magnetic field of 0.50 T. Due to external forces, the area of the lo

pogonyaev

Answer:

$6.3\cdot 10^{-4} V$

Explanation:

According to Faraday-Newmann-Lenz, the induced emf in the loop is given by:

$\epsilon=-\frac{\Delta \Phi}{\Delta t}$ (1)

where $\frac{\Delta \Phi}{\Delta t}$ is the rate of variation of the magnetic flux through the loop.

We know that the magnetic flux through the loop is given by

$\Phi = BA$

where B is the magnetic field and A is the area of the loop. Since the magnetic field is constant, we can write the variation of flux as

$\Delta \Phi = B \Delta A$

So eq.(1) becomes

$\epsilon=-B\frac{\Delta A}{\Delta t}$

and the problem gives us:

$B=0.50 T$ is the magnetic field

$\frac{\Delta \Phi}{\Delta t}=-1.26\cdot 10^{-3} m^2/s$ is the rate at which the area changes

Substituting into the equation, we find

$\epsilon=-(0.50 T)(-1.26\cdot 10^{-3} m^2/s)=6.3\cdot 10^{-4} V=0.63 mV$

8 0

3 years ago