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schepotkina [342]
3 years ago
12

2 Points

Physics
1 answer:
posledela3 years ago
6 0

Answer:

A. Lever

Explanation:

A  Lever is the kind of simple machine is the shin bone in your leg.

Hope this helps!

Feel free to ask if you have anymore questions!

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Snell's Law: Light traveling through water comes to a glass surface at an angle of incidence of
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Answer:

1. The best definition of refraction is ____.

a. passing through a boundary

b. bouncing off a boundary

c. changing speed at a boundary

d. changing direction when crossing a boundary

 

Answer: D

Bouncing off a boundary (choice b) is reflection. Refraction involves passing through a boundary (choice a) and changing speed (choice c); however, a light ray can exhibit both of these behaviors without undergoing refraction (for instance, if it approaches the boundary along the normal). Refraction of light must involve a change in direction; the path must be altered at the boundary.

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3 years ago
Which of the following items conducts thermal energy best?
kompoz [17]
Its b i belive

because it the only thing i saw on the list that conduts

                                      
                
   
6 0
3 years ago
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3 years ago
At constant volume, the heat of combustion of a particular compound is − 3550.0 kJ / mol. When 1.075 g of this compound ( molar
swat32

Answer:

C=1,25\cdot 10^{5} kJ/^{\circ}C

Explanation:

First of all let's define the specific molar heat capacity.

C = \frac{-Q}{n\cdot \Delta T} (1)

Where:

Q is the released heat by the system

n is the number of moles

ΔT is the difference of temperature of the system  

Now, we can find n with the molar mass (M) the mass of the compound (m).

n=\frac{m}{M}=6.95\cdot 10^{-3} moles      

Using (1) we have:

C=\frac{-3550}{6.95\cdot 10^{-3} 4.073}

C=1,25\cdot 10^{5} kJ/^{\circ}C

I hope it helps!

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