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1 year ago

I need help with question 6 and 7!!! Also, how to do the back???

Physics

2 answers:

Rina8888 [55]1 year ago

8 0

What i don’t understand what the question is

lora16 [44]1 year ago

7 0

Reword the questions and you’ll get it right

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A wave with a low frequency generally has a _____.

Artyom0805 [142]

Its C because if it is a low frequency it will not change much so it will be a longer wavelength and the higher the frequency the shorter the wavelength

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2 years ago

What does a battery powered heater warms up from ?

Westkost [7]

Battery based heaters use electric resistance heating, which uses a lot of current (electricity) to create the heat.

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2 years ago

Wavelength of 125 meters is moving at a speed of 10 m/s.<br> What is it's frequency?

Alexandra [31]

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Frequency= 12.5

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2 years ago

A 58 kg skier is going down a 35 degree slope. The areaof each

maxonik [38]

To solve this problem we will use a free body diagram that allows us to determine the Normal Force.

In general, the normal force would be equivalent to

$N = mgcos\theta$

Since the skier is standing on two skis, his weight will be divide by two

$N' = \frac{mgcos\theta}{2}$

Pressure is given as the force applied in a given area, that is

$P = \frac{F}{A}$

Replacing F with N'

$P = \frac{N'}{A}$

$P = \frac{\frac{mgcos\theta}{2}}{A}$

Our values are given as,

$m = 58kg$

$g = 9.8m/s^2$

$\theta = 35\°$

$A = 0.3m^2$

Replacing we have that

$P = \frac{\frac{(58)(9.8)cos(35)}{2}}{0.3}$

$P = 776.01Pa$

Therefore the pressure exerted by each ski on the snow is 776.01Pa

6 0

2 years ago

Add vectors 7.5 m/s and the vector -2.9 m/s

densk [106]

How To:

How do you add two vectors?

To add or subtract two vectors, add or subtract the corresponding components. Let →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is called the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .

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2 years ago