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ratelena [41]
3 years ago
10

7. A stone is thrown horizontally with an initial

Physics
1 answer:
Kobotan [32]3 years ago
5 0
The answer is (E) 8 s
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One cubic meter (1.0 m3
hammer [34]
Because the masses that you give are for blocks that are 1 cubic meter in volume, they also serve as the densities for the two metals that you are comparing. 

<span>mass = density*volume </span>

<span>volume = (4/3)*pi*r^3 </span>

<span>volume of iron sphere = (4/3)*3.14*0.0201^3 = 3.40*10^-5 m^3 </span>

<span>mass of iron sphere = 7860* 3.40*10^-5 m^3 = 0.27 kg = mass of Aluminum Sphere </span>

<span>Volume of Al Sphere = 0.27/2700 = 9.90*10^-5 m^3 </span>

<span>Radius = cube root (volume / (4/3) / pi) = 2.87 cm. </span>

<span>I did this using the MS calculator, and I'm not 100% sure on the numerical answer, but the process is what you need to do to solve the problem. You should double check my answer.

hope this helped :)


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8 0
3 years ago
the aeroplane in fig 3.1 flies an outward journey from Budapest (Hungary) to palermo (Italy) in 2.75 the distance is 2200 KM (i)
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Answer: what is the cause

Explanation:

5 0
3 years ago
What statement about energy transfer in a wave is true?
laila [671]

Answer:

Energy moves between the particle of the medium.

Explanation:

8 0
3 years ago
I need help with this pls
enyata [817]
Friction makes a moving object slower
8 0
3 years ago
A U.S. Department of Energy report estimates that over 100 billion kWh/year can be saved in the United States by various energy-
I am Lyosha [343]

Answer:

(a). 12 plants

(b). 3171 $

Explanation:

(a)first convert units of 100 billion kWh/year into Watts(W)

also convert the units of 1000 MW into Watts(W)

1 billion = 10^9

1 year = 365*24 = 8760 hrs

so

100 billion kWh/year = 1\frac{100*(10^9)*(10^3)}{8760}

                                  = 1.142*10^{10}W

1000 MW                  = 1000*10^{6} = 10^{9}W

no. of plants = \frac{1.14155*10^{10} }{10^9} = 11.4

So 12 plants required        

(b)

savings = unit price*total units

             = 0.1 * 1.142*10^{10}( \frac{1}{1000*3600} )

             = 3170.9 =3171 $

4 0
3 years ago
Read 2 more answers
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