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bekas [8.4K]
3 years ago
10

At a college homecoming 20 students lifted a sports car. Each student exerted 450N of upward force on the car. a) What is the ma

ss of the car in kg? b) What is its weight in lbs?
Physics
1 answer:
Nonamiya [84]3 years ago
8 0

Answer:

(a) 918.37 kg

(b) 2020.41 lbs

Explanation:

number of students = 20

Force of each student = 450 N

Total upward force = 450 x 20 = 9000 N

(a)

Let m be the mass of car

F = m x g

9000 = m x 9.8

m = 918.37 kg

(b)

As we know that, 1 kg = 2.20 lbs

So, 918.37 kg = 2.20 x 918.37 = 2020.41 lbs

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Mark all the fermions a) Proton b) Electron c)Anti-top d) Gluon e) Tau Neutrino
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(a) Proton, (b) Electron (c) tau neutrino.

Explanation:

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The elementary particles are classified into three categories which are discussed below:

(1) Quarks: up, down, top, bottom, strange, and charm.

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3 years ago
The resultant of 2 forces at right angles is 100 lbs. If one of the forces makes an angle of 30 degress with the resultant, comp
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Answer:

86.6 lbs

Explanation:

Let the force is X.

Resultant force, R = 100 lbs

Other force is Y. Angle between resultant force and force X is 30°.

According to the diagram

Cos30=\frac{X}{R}

0.866=\frac{X}{100}

X = 86.6 lbs

Other force Y

Sin30=\frac{X}{R}

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Y = 50 lbs

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You have an empty 20 oz. soda bottle and you blow air over the opening to excite a fundamental standing wave. Now, you slice off
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Answer:

The frequency of the standing wave in the second case is higher than that in the first case

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The frequency and wavelength of a wave are related.

The moment you sliced the bottle, you've reduced the wavelength of the bottle.

When wavelength decreases, frequency increases and vice versa.

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