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Natali [406]
3 years ago
10

What is the difference between protraction and retraction?

Physics
1 answer:
Nina [5.8K]3 years ago
6 0

Answer:

Protraction and retraction are opposite of each other.

Explanation: For example, here are difference between the two.

1. Protraction occurs when the lower has is pushed forward to stick to the chin, Retraction, being the opposite pulls the lower jaw backward.

2. Scapular retraction, this help to move the shoulder blade(scapula) towards the spine, also Protraction being the opposite help to move the shoulder blade away from the spine.

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What are 5 wave interactions with matter?
liberstina [14]
Reflection
Refraction
Diffraction
Transmission
Absorption
8 0
3 years ago
you paddle a canoe with the force of 200N. you and the canoe have a combined mass of 97KG . what is the acceleration of the cano
erastovalidia [21]
Use Newton's (second) Law:
F=ma
with your data:
200=97a
a=2m/s^{2}

6 0
3 years ago
Calculate the force it would take to accelerate a 250 kg motorcycle at a rate of 5m/s^2
bija089 [108]

1250 N of force is required to accelerate a 250 kg motorcycle at a rate of 5 m/s^{2}.

<u>Explanation:</u>

As per the second law of motion stated by Newton, the net unbalanced external force acting on any object is directly proportional to the product of mass and acceleration experienced by the object.

As here the object is given as motorcycle of mass 250 kg. Also the acceleration exhibited by the motorcycle is stated as 5 m/s^{2}. So from the Newton's second law of motion,

Net force = Mass of the motorcycle× Acceleration of the motorcycle

Net force = 250 × 5 = 1250 N.

Thus, 1250 N of force is required to accelerate a 250 kg motorcycle at a rate of 5 m/s^{2}.

5 0
3 years ago
A small bulb is rated at 7.5 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity α = 0.
alisha [4.7K]

To solve this problem we will apply the concepts related to resistance as a function of temperature, product of the relationship between the squared voltage and the power. Mathematically this is,

R = \frac{v^2}{P}

Here,

R = Resistance (At function of temperature)

v = Voltage

P = Power

Then we have,

R at 140°C (7 times room temperature),

R(140\°C) = \frac{125^2}{7.5}

R(140\°C) = 2083.33\Omega

The relationship between normal temperature and increased temperature would then be given by,

R(140\°C) = R(20\°C)(1 +\alpha (\Delta T))

R(140\°C) = R(20\°C)(1+(4.5*10^{-3})(140-20))

R(20\°C) = \frac{2083.33}{1.54}

R(20\°C) = 1352.81\Omega

Therefore the correct value of the group of answer is 1350

5 0
3 years ago
5. The most dangerous place to use electrical equipment is?
podryga [215]
C) because you could get hurt if certain items fall in it and you are in water
7 0
3 years ago
Read 2 more answers
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