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3 years ago

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Physics

2 answers:

Alex Ar [27]3 years ago

6 0

Answer:

The ranking of the waves from the lowest energy wave to the highest energy wave is 1 → 4 → 2 → 3.

Explanation:

Amplitude is the highest vibrated position of a wave measured from the equilibrium position.
So the least amplitude for wave 1 is the least energy representation.
Similarly distance from midpoint to crest or trough is also the measure for the energy level of wave. Crest and trough, both are the maximum amplitude condition of the wave.
So 12 cm being the highest represents the highest energy level i.e wave 3.

stira [4]3 years ago

4 0

Answer: 1 → 4 → 2 → 3.

Explanation:

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. A huge pile of leaves was wrapped in a tarp in the middle of a lawn. The wrapped leaves weigh 580 newtons. The coefficient of

Rina8888 [55]

The force required is 319 N

Explanation:

The force of static friction is a force that acts an object on a surface, when this object is pushed by another force to put it in motion. The direction of the force of friction is opposite to the direction of the force of push, and its value increases as the force of push increases, up to a maximum value given by:

$F_f = \mu W$

where

$\mu$ is the coefficient of friction

W is the weight of the object

Therefore, in order to put the object in motion, the force applied must be greater than this value.

For the pile of leaves in this problem, we have:

$\mu = 0.55$ (coefficient of friction)

$W=580 N$ (weight of the leaves)

Substituting, we find:

$F=(0.55)(580)=319 N$

Learn more about force of friction:

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4 years ago

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scoray [572]

Jim walks 7 miles from the starting point to the end point
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4 years ago

Read 2 more answers

A mailman performed 588J of work lifting a box 1.4 m. How much force did the mailman use?

lord [1]

As we know that work done due a force F is given by formula

$W = F.d$

here F = applied force due to which work is done

d = displacement of object

now here we will have

W = 588 J

d = 1.4 m

now we can find force by above formula

$588 = F* 1.4$

$F =\frac{588}{1.4}$

$F = 420 N$

So applied force by milkman is F = 420 N

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3 years ago

Which type of image is formed on a cinema screen?

Taya2010 [7]

Answer:

A real image is formed on a cinema screen.

Explanation:

It is a type of image that is formed when light rays coming from an object meet each other in actual after reflection or refraction. A real image can be easily obtained on the screen. It is always inverted

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3 years ago

An Olympic runner competing in a long-distance event finishes with a time of 2 hours, 45 minutes, and 35 seconds. The event has

Readme [11.4K]

Answer:

Average speed of Olympic runner will be 23.08 km/hr

Explanation:

We have given distance d = 27.3 miles

We know that 1 mile = 1.6 km

So 27.3 mile = $=27.3\times 1.6=43.68km$