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OverLord2011 [107]
3 years ago
15

S waves are longitudinal seismic waves. T F

Physics
2 answers:
Veronika [31]3 years ago
7 0

true............................................

ss7ja [257]3 years ago
5 0
<span>S waves are longitudinal seismic waves. </span>True

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The slope of the line on a speed-time graph tells the speed , true or false ?
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A scientist prepares a colloidal solution and pours it into a glass tank. She then flashes a beam of white light into one end of
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A cylinder of mass 14.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed o
aev [14]

Answer:

a) 567J

b) 283.5J

c)850.5J

Explanation:

The expression for the translational kinetic energy is,

E_r = \frac{1}{2} mv^2

Substitute,

14kg for m

9m/s for v

E_r = \frac{1}{2} (14) (9)^2\\= 567J

The translational kinetic energy of the center of mass is 567J

(B)

The expression for the rotational kinetic energy is,

E_R = \frac{1}{2} Iw^2

The expression for the moment of inertia of the cylinder is,

I = \frac{1}{2} mr^2

The expression for angular velocity is,

w = \frac{v}{r}

substitute

1/2mr² for I

and vr for w

in equation for rotational kinetic energy as follows:

E_R = (\frac{1}{2}) (\frac{1}{2} mr^2)(\frac{v}{r} )^2

= \frac{mv^2}{4}

E_R = \frac{14 \times 9^2 }{4} \\\\= 283.5J

The rotational kinetic energy of the center of mass is 283.5J

(c)

The expression for the total energy is,

E = E_r + E_R\\\\

substitute 567J for E(r) and 283.5J for E(R)

E = 567J + 283.5\\= 850.5J

The total energy of the cylinder is 850.5J

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3 years ago
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Theweight ofof body is 420N .Calculate its mass​
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Answer:

42.87

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420/9.8 which equals 42.87.

6 0
3 years ago
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