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3 years ago

What does sealant restorations mean?

1 answer:

4 0

Sealants<span> are used to protect healthy teeth that have a high potential for decay. Most often, these are the molars with deep grooves. A PRR, preventive resin </span>restoration<span>, is a type of filling that is placed when a cavity has begun and is infiltrating the grooves in the chewing surface of the tooth............</span>

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Consider the following FBDs.FBDsAn elevator is suspended by a cable and moves uniformly upward. Which of the above free body dia

Drupady [299]

The force of gravity F_g will act downwards.

Normal force F_N will act upwards equal to the force of gravity.

A force due to uniform acceleration F_a will act upwards to move the elevator upwards.

Thus, figure E is the correct answer.

6 0

1 year ago

State examples of a transverse wave.

laiz [17]

ripples on the surface of water.

vibrations in a guitar string.

a Mexican wave in a sports stadium.

electromagnetic waves – eg light waves, microwaves, radio waves.

seismic S-waves.

6 0

3 years ago

Read 2 more answers

50 POINTS !!!

shepuryov [24]

Answer:

a) I = 464 kg m², b) K = 631 .6 J, c) v = 8.25 m / s

Explanation:

a) the moment of inertia of point particles is

I = ∑ m_i r_i²

in this case

I = 8 5² + 3 (-2) ² + 7 (-6) ²

I = 464 kg m²

b) The kinetic energy is

K = ½ I w²

K = ½ 464 1.65²

K = 631 .6 J

c) linear and angular velocity are related

v = w r

v = 1.65 5

v = 8.25 m / s

8 0

3 years ago

What factor determines an object's momentum?

vlada-n [284]

Momentum = mass x velocity

So both mass and velocity affect an object's momentum.

3 0

3 years ago

A boy weighs 400N. what is his mass?

Basile [38]

≈40.8kg

this is to take up space

400

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400

9.8

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9.8

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400

9.8

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400

9.8

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40.8

400

9.8

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9.8

m/s

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40.8

400

9.8

m/s

≈

40.8

400

9.8

m/s

≈

40.8

400

9.8

m/s

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40.8

4 0

3 years ago

Read 2 more answers