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2 years ago

An outside thermometer reads 57 F. What is this temperature in C ? Round you’re answer to the nearest whole number

Physics

2 answers:

ElenaW [278]2 years ago

5 0

It’d be 13.9*c, but if you’re rounding it’s 14*c

Marianna [84]2 years ago

4 0

14 degrees celsius hope this helps

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A Ferris wheel with 60 spokes has a diameter of 100 m. It makes one rotation every 60 seconds. Find the speed of the passengers

Doss [256]

Answer:

<em>The speed of the passengers is 5.24 m/s</em>

Explanation:

<u>Uniform Circular Motion </u>

It occurs when an object in a circular path travels equal angles in equal times.

The angular speed can be calculated in two different ways:

$\displaystyle \omega=\frac{v}{r}$

Where:

v = tangential speed

r = radius of the circle described by the rotating object

Also:

$\omega=2\pi f$

Where:

f = frequency

Since the frequency is calculated when the number of revolutions n and the time t are known:

$\displaystyle f=\frac{n}{t}$

The Ferris wheel has a diameter of 100 m and makes n=1 rotation in t=60 seconds, thus the frequency is:

$\displaystyle f=\frac{1}{60}\ Hz$

The angular speed is:

$\displaystyle \omega=2\pi \frac{1}{60} =\frac{\pi}{30} \ rad/s$

Now we calculate the tangential speed, solving this formula for v:

$\displaystyle \omega=\frac{v}{r}$

$v=\omega . r$

The radius is half the diameter, r=100/2=50 m:

$\displaystyle v=\frac{\pi}{30} . 50$

Calculating:

v = 5.24 m/s

The speed of the passengers is 5.24 m/s

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2 years ago

A student says that a speed of 50 m/s is faster than a speed of 140 km/h because the number is bigger. What would you say to the

Yuri [45]

if you convert these into miles per hour 50 m/s would be higher, since

50 m/s = 111.85 mph and

140 km/h = 86.99 mph

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