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2 years ago

5

A herringbone or tire track pattern on a radiograph is a result of: _______.A. Insufficient vertical angulation B. Film bending

C. Excessive horizontal angulation D. Incorrect film placement

1 answer:

Schach [20]2 years ago

6 0

Answer: D Incorrect film placement

Explanation: The film packet was placed backward in the oral cavity.

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If it takes you 20 joules of work to move a couch 10 meters in 10 seconds, what is the power?

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Answer:

Power = 2 j/s

Explanation:

Power = Work / Time

= 20/10

= 2 j/s

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A rock is thrown straight down, not dropped, from the roof of a building that is 61 m above the ground. If it takes 3.1 s to rea

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What is the weight of an astronaut with a mass of 75 kg on the moon? The gravitational field strength on the moon is 1.6 Nkg-1.

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<u>What is the gravitational field strength on the moon?</u>

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2 years ago

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3 years ago

A uniform 1.6-kg rod that is 0.89 m long is suspended at rest from the ceiling by two springs, one at each end. Both springs han

artcher [175]

Answer:

8.27°

Explanation:

To angle difference will be determined by the difference in the displacement of the springs, produced by the weight of the center of mass of the rod.

$d=y_1-y_2=\frac{F_1}{k_1}-\frac{F_2}{k_2}=\frac{0.5mg}{31N/m}-\frac{0.5mg}{63N/m}\\\\d=0.5(1.6kg)(9.8m/s^2)[\frac{1}{31N/m}-\frac{1}{63N/m}]=0.128m$

by a simple trigonometric relation you obtain that the angle:

$sin\theta=\frac{d}{l}=\frac{0.128m}{0.89m}=0.144\\\\\theta=sin^{-1}(0.144)=8.27\°$

hence, the angle between the rod and the horizontal is 8.27°

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2 years ago