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Nady [450]
3 years ago
9

After a long night of cramming for a test, your college roommate hits his head forcefully against the wall of your room in despa

ir. According to Newton 3d Law, as he exerts a force against the wall, there must be an equal and opposite force. How does that opposite force show itself in its case?
Physics
1 answer:
sweet [91]3 years ago
3 0

Answer:

See the answer below

Explanation:

Newton's third law states that for every action, there will always be an opposing reaction of equal magnitude to the action.

<em>Hence, the wall will exert an equal opposing force to the head and the roommate will feel this opposing force as pains and/or headache. </em>

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I need help on this question.
stira [4]

Answer:

<em>Answer: B. 49 N</em>

Explanation:

<u>Friction Force </u>

When an object is at rest on a rough surface, it encounters a friction force that opposes motion.

The friction force when an object is moving on a horizontal surface is calculated by:

Fr=\mu_k N

Where \mu_k is the coefficient of static friction and N is the normal force.  

If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:

N = W = m.g

Thus, the friction force is:

Fr=\mu_k W

We are given the coefficient of static friction \mu_k=0.5 and the mass of the object m=10 Kg. The minimum force needed to make it start moving is the maximum friction force:

Fr=0.5*10*9.8

Fr = 49 N

Answer: B. 49 N

8 0
3 years ago
Rank in order the following according to their speeds, from fastest to slowest: (i) 425-nm-wavelength light through a pane of gl
kotegsom [21]

Answer:

v > ii > iii > i > iv

Explanation:

The speed of light does not depend on the wavelength of light rather the medium through which it passes through.

v) The speed of light in a vacuum is maximum = 300000 km/s

ii) The speed of light in air = 2999910.026 km/s

iii) The speed of light in water = 2255639.097 km/s

i) The speed of light in glass = 1973684.210 km/s

iv) The speed of light in diamonds = 1239669.421 km/s

Hence the ranking will be

v > ii > iii > i > iv

5 0
3 years ago
The motion of as car is drawn is vi against th graph​
LenKa [72]
10 and 40 would be your answer i believe.
3 0
3 years ago
How do I do number 8, plz respond quick, I have a big unit test on this and I’m rocking a 65 science average rn. Thank you for t
xxTIMURxx [149]

Answer:

3 is the correct answer for number 8

6 0
4 years ago
Read 2 more answers
HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Burka [1]
The correct matches are as follows:

<span>1. Mechanical Energy
</span>This is the energy of motion and position - Kinetic Energy and Potential Energy are included here. 
<span>
2. Electrical Energy
</span>This is the type of energy that is given off as a result of electrons (charges!) moving through a conductor. 
<span>
3. Light Energy
</span>This is the only form of energy we can see with our eyes! 
<span>
4. Thermal Energy
</span>This is heat energy! It can be transferred through conduction, convection, or radiation. 
<span>
5. Sound Energy
</span>This is energy that is transmitted through vibrations. 
<span>
6. Kinetic Energy
</span>This is the energy that all moving objects have. <span>

7. Potential Energy
</span>This is stored energy, waiting to be used! 
4 0
3 years ago
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