Which of the following is an example of Kinetic to Electrical energy

What is the weight in newtons of a 10 kg mass on the earth's surface?

juin [17]

Answer:

98 kg

Mass is given as 10 kg. Therefore, Weight = 10 kg * 9.8 m/s^2. Weight = 98 kg.m/s^2. = 98 Newtons.

Explanation:

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5 0

3 years ago

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In the average US household, the television is on 6.75 hours/day! How many hours will have passed after 77.7 years (the average

Nady [450]

Answer:

191433.4 hours

Explanation:

We are given that In the average US household, the television is on 6.75 hours/day! How many hours will have passed after 77.7 years (the average lifeexpectancy of an American)?

1 year - 365 days

Given that the television is on 6.75 hours/day.

If 1 year = 365 days

Convert 77.7 years to days by multiplying it by 365

77.7 × 365 = 28360.5 days

So the number of hours will be:

28360.5 × 6.75 = 191433.375 hours

Therefore, 191433.4 hours will pass.

Non of the options is correct.

6 0

3 years ago

A coffee filter of mass 1.2 grams dropped from a height of 1 m reaches the ground with a speed of 0.8 m/s. How much kinetic ener

iren [92.7K]

Answer: The energy gained by the air molecules is 0.011 J.

Explanation:

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.

Here, the potential energy of the coffee filter is getting converted into kinetic energy of the coffee filter and some energy is lost by it which is gained by the air molecules in the form of kinetic energy.

So, calculating the potential energy of coffee filter, we use the equation:

P = mgh

where,

m = mass of coffee filter = 1.2 g = $1.2\times 10^{-3}kg$ (Conversion used: 1 kg = 1000 g)

g = acceleration due to gravity = $9.8m/s^2$

h = height of coffee filter = 1 m

Putting values in above equation, we get:

$P=1.2\times 10^{-3}kg\times 9.8m/s^2\times 1m\\\\P=1.176\times 10^{-2}J$

Calculating the kinetic energy of coffee filter, we use the equation:

$E=\frac{1}{2}mv^2$

where,

m = mass of coffee filter = 1.2 g = $1.2\times 10^{-3}kg$

v = speed of coffee filter = 0.8 m/s

Putting values in above equation, we get:

$E=\frac{1}{2}\times 1.2\times 10^{-3}kg\times (0.8m/s)^2\\\\E=3.84\times 10^{-4}J$

As, energy lost by coffee filter = energy gained by air molecules

So, energy lost by coffee filter = Potential energy - Kinetic energy

Energy lost by coffee filter = $(1.176\times 10^{-2})-(3.84\times 10^{-4})=0.011J$

Hence, the energy gained by the air molecules is 0.011 J.

5 0

3 years ago

Sound waves are simultaneously interpreted through air (going through the external,

laila [671]

Not sure if this is right but I think it’s TRUE sorry if it’s wrong....

4 0

3 years ago

An automobile has a vertical radio antenna 1.45 m long. The automobile travels at 70.0 km/h on a horizontal road where Earth's m

Agata [3.3K]

Answer:

595.73 X 10⁻⁶ V.

Explanation:

The magnetic field is towards the north with dip angle equal to 65 so the horizontal component of earth's magnetic field will be

H = 50 X 10⁻⁶ Cos 65 = 21.13 x 10⁻⁶ T.

length of rod L = 1.45 M

Velocity of rod = 70 km / h = 19.444 m /s

Since the top of the antenna rod is to have positive polarity , current induced in it will be from down to up . Magnetic field is towards the north .

To cut magnetic flux perpendicularly , rod should move towards the east .

We can easily get this direction by applying Fleming's right hand Rule.

Induced emf = H L v

= 21.13 x 10⁻⁶ X 1.45 X 19.444

= 595.73 X 10⁻⁶ V.

8 0

3 years ago