2 years ago

Check the boxes of all the TRUE statements about weight and the acceleration due to gravity.

Physics

1 answer:

vlada-n [284]2 years ago

7 0

A is the answer because it is the answer

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What is the net force of a 25 g object with an acceleration of 3 m/s^2? 100PTS

gayaneshka [121]

Explanation:

Force=Mass×acceleration

force=25×3

force=75N

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2 years ago

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The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of t

EastWind [94]

Answer:

w = 11.211 KN/m

Explanation:

Given:

diameter, d = 50 mm

F.S = 2

L = 3

Due to symmetry, we have:

$Ay = By = \frac{w * 6}{2} = 3w$

$P_c_r = 3w * F.S = 3w * 2.0 = 6w$

$I = \frac{\pi}{64} (0.05)^4 = 3.067*10^-^7$

To find the maximum intensity, w, let's take the Pcr formula, we have:

$P_c_r = \frac{\pi^2 E I}{(KL)^2}$

Let's take k = 1

$E = 200*10^9$

Substituting figures, we have:

$6w = \frac{\pi^2 * 200*10^9 * 3.067*10^-^7}{(1 * 3)^2}$

Solving for w, we have:

$w = \frac{67266.84}{6}$

w = 11211.14 N/m = 11.211 KN/m

Since Area, A= pi * (0.05)²

$\sigma _c_r = \frac{w}{A}$

$\sigma _c_r = \frac{11.211}{\pi (0.05)^2} = 1.4 MPA < \sigma y$ . This means it is safe

The maximum intensity w = 11.211KN/m

3 0

3 years ago

How much heat is required to warm 122 g of water by 23.0 c?

GaryK [48]

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3 years ago

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If a jet travels 350 m/s, how far will it travel each second?

77julia77 [94]

Answer:

It will travel 350 meters each second.

Explanation:

The unit rate, 350 m/s, tells us that the jet will travel 350 meters per every second elapsed.

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2 years ago

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Zeros that follow non-zero numbers and are also to the right of a decimal point are significant.

Ivenika [448]

Yes that's correct. Also zeros in between non-zero numbers are significant figures

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3 years ago

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