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2 years ago

5

You and your friend are having a discussion about weight. He claims that he weighs less on the on the 100th floor of a building

than he does on the ground floor. Is he correct? support your answer with evidence.

1 answer:

Andru [333]2 years ago

8 0

Answer:

SICENCE

Explanation: ITS RIGHT

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Does a solid sit by itself

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The population in the United States in 2015 was 321 million people. It is projected to increase to 438 million people by the yea

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3 years ago

How much work does a 120 watt motor perform for 300 seconds?

MrRa [10]

Answer:

36,000j

Explanation:

W= P•t

120•300= 36000

I checked my answer with P= W/t and got the right answer

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2 years ago

The lamp has a resistance of 10Ω

Jet001 [13]

D) Less than 20.

Explanation:

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3 years ago

An automobile traveling 89.0 km/h has tires of 62.0 cm diameter. (a) What is the angular speed of the tires about their axles? (

bekas [8.4K]

Answer:

a) 79.7rad/s

b) -18.7rad/s^2

c) 53m

Explanation:

We will use the MKS system of unit, so:

$v=89.0km/h=89.0\frac{km}{h}*\frac{1000m.h}{3600km.s}=24.7m/s\\\\d=62.0cm=62.0cm*\frac{0.01m}{1cm}=0.62m$

now, The angular speed is given by:

$\omega=\dfrac{v}{\frac{d}{2}}\\\\\\\omega=\frac{24.7m/s}{0.31m}=79.7rad/s$

in order to obtain the angular acceleration we have to apply the following formula:

$(\omega_f)^2=(\omega_o)^2+2\alpha*\theta\\\\\alpha=-\frac{(\omega_o)^2}{2*rev*2\pi}\\\\\alpha=-\frac{(79.7m/s)^2}{2*27*2\pi}=-18.7rad/s^2$

The linear displacement is given by:

$d_l=\theta*r\\d_l=rev*2\pi*\frac{d}{2}\\\\d_l=27*2\pi*0.31m=53m$

3 0

2 years ago