A certain wave has a wavelength of 35 meters and a frequency of 4.0hz. What is the speed of the wave

Arm circles are an effective dynamic stretch for swimmers because they raise blood pressure and improve muscle stamina lower bod

dybincka [34]

Answer : Option C) copy the movements performed during the activity.

Explanation : Arm circles are an effective dynamic stretch for swimmers because they copy the movements performed during the activity.

During swimming when the arm circles are performed it stretches the triceps brachii, loosens the shoulder blade and stretches the side muscles.

Often many people are observed to perform this arm circles stretch without bringing the elbow behind the head, but especially for swimmers, this increases the stretching length and reduces stress while swimming.

8 0

3 years ago

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Find the work done in pumping gasoline that weighs 6600 newtons per cubic meter. A cylindrical gasoline tank 3 meters in diamete

almond37 [142]

Answer:

work done in pumping the entire fuel is 1399761 J

Explanation:

weight per volume of the gasoline = 6600 N/m^3

diameter of the tank = 3 m

length of the tank = 6 m

The height of the tractor tank above the top of the tank = 5 m

The total volume of the fuel is gotten below

we know that the tank is cylindrical.

we assume that the fuel completely fills the tank.

therefore, the volume of a cylinder =

where r = radius = diameter ÷ 2 = 3/2 = 1.5 m

volume of the cylinder = 3.142 x x 6 = 42.417 m^3

we then proceed to find the total weight of the fuel in Newton

total weight = (weight per volume) x volume

total weight = 6600 x 42.417 = 279952.2 N

therefore,

the work done to pump the fuel through to the 5 m height = (total weight of the fuel) x (height through which the fuel is pumped)

work done in pumping = 279952.2 x 5 = 1399761 J

5 0

3 years ago

There is a box on the floor. The following forces are being applied to it:

Sergio [31]

The answer is 6.

Add 4 then divide 2. You should have 18 after you do that, subtract 10 then multiply 20. You then have 6.

3 0

3 years ago

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A student does 25 J of work on the handle of a pencil sharpener. If the pencil sharpener does 20 J of work on the pencil, what i

allsm [11]

Answer:

80%

Explanation:

Efficiency of machine = work output/work input ×100 %

From question, work output = 20J

Work input = 25J.

Therefore efficiency = 20/25 × 100 %

Efficiency = 20×4 %

Efficiency = 80%

I hope this was helpful, please mark as brainliest

3 0

3 years ago

An object falling from a great height in Earth's atmosphere eventually reaches a speed called Terminal velocity. What cause a fa

Julli [10]

Answer:

A.

Explanation:

If its at a height the Gratitude of it falling down with only Gravity if Any other Forces are acting on it so as Friction But Sideways.

5 0

3 years ago