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Alex Ar [27]
3 years ago
7

HURRRRRRRRRYYYYYYYYYYYYYYYYYYYY!!!!!!

Physics
2 answers:
victus00 [196]3 years ago
4 0
Friction resists motion.
Friction is a contact force.
<span>Friction is caused by microscopic bumps and ridges on surfaces. 
</span>
They all correct, just took the quiz. 
Tresset [83]3 years ago
3 0

Answers:

3 Friction is a contact force.  

4 Friction is caused by microscopic bumps and ridges on surfaces.

Explanation:

Friction is a force that opposes the motion of an object. For example, when you are sliding a box along a surface, there is a friction force that resists the motion.

The friction force is caused by the contact between the molecules of the external surfaces of the object and the molecules of the surface where the object is sliding over. Therefore, it is a contact force (statement 3) and also it is caused by the bumps and ridges on the surfaces (statement 4): in fact, if the surfaces were perfecly smooth, in theory there would be no friction (but this is impossible in reality).

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SCIENCE HELP! PLEASE HELP URGENT!
Nonamiya [84]
It is also tripled, there is a rule to everything, whatever you do to one thing, you do the exact thing to the other. Hope this solves it :)
6 0
3 years ago
A 45.0-kg sample of ice is at 0.00°C. How much heat is needed to melt it? For water, Lf=334 kJ/kg and Lv=2257 kJ/kg 
Aleonysh [2.5K]

Heat required to change the phase of ice is given by

Q = m* L

here

m = mass of ice

L = latent heat of fusion

now we have

m = 45 kg

L = 334 KJ/kg

now by using above formula

Q = 45 * 334 * 10^3

Q = 1.5 * 10^7 J

In KJ we can convert this as

Q = 1.5 * 10^4 kJ

so the correct answer is D option

7 0
3 years ago
Read 2 more answers
.Which equation represents the most accurate model of cellular respiration? Note: C6H12O6 is sugar.
Shkiper50 [21]

The equation that most accurately represents the model of cellular respiration is: C6H12O6 (sugar) + 6O2 (oxygen) = 6CO2 (carbon dioxide) + 6H2O (water) + energy.

<h3>CELLULAR RESPIRATION:</h3>

Cellular respiration is the process whereby living organisms obtain energy by breaking down food molecules in their cells.

The process of cellular respiration breaks down sugar molecules (glucose) in the presence of oxygen to produce carbon dioxide and water as products, as well as energy in form of ATP.

Therefore, the equation that most accurately represents the model of cellular respiration is: C6H12O6 (sugar) + 6O2 (oxygen) = 6CO2 (carbon dioxide) + 6H2O (water) + energy.

Learn more about cellular respiration at: brainly.com/question/12671790?referrer=searchResults

4 0
3 years ago
The legend that Benjamin Franklin flew a kite as a storm approached is only a legend; he was neither stupid nor suicidal. Suppos
UNO [17]

Answer:

The current on the water layer = 1.64×10^-3A

Explanation:

Let's assume that the radius given for the string originates from the centre of the string. The equation for determining the current in the water layer is given by:

I = V × pi[(Rwater + Rstring)^2 - (Rstring)^2/ ( Resitivity × L)

I =[ 166×10^6 ×3.142[(0.519×10^-4) + (2.15×10^-3])^2 - ( 2.15×10^-3)^2] / ( 183 × 831)

I =[ 521572000(4.848×10^6)- 4.623×10^-6]/ 154566

I = 252.83 -(4.623×10^-6)/ 154566

I = 252.83/154566

I = 1.64× 10^-3A

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snow_tiger [21]
Soory i think multiple of velocity and angle
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