A. Starts slowly and then accelerates.
Answer:
Q = 48341.7 Joules.
Explanation:
<u>Given the following data;</u>
Mass, m = 257g
Initial temperature, T1 = 18°C
Final temperature, T2 = 63°C
Specific heat capacity of water, c = 4.18 J/g°C.
*To find the quantity of heat absorbed*
Heat capacity is given by the formula;
Where;
- Q represents the heat capacity or quantity of heat.
- m represents the mass of an object.
- c represents the specific heat capacity of water.
- dt represents the change in temperature.
dt = T2 - T1
dt = 63 - 18
dt = 45°C
<em>Substituting the values into the equation, we have;</em>
<em>Q = 48341.7 Joules.</em>
<em>Therefore, the amount of heat absorbed is 48341.7 Joules</em>.
Answer:
The duration of the movie is longer than 2 hrs.
Explanation:
Given:
The duration of the movie observed by the crew on the spacecraft is 2 hrs.
According to time-dilation formula:
Here, is the required time, is the original time, is the velocity of the spacecraft and is the velocity of light.
Since , so .
So the time required will be large.
Answer:
The orbital speed can be found using v = SQRT(G*M/R). The R value (radius of orbit) is the earth's radius plus the height above the earth - in this case, 6.59 x 106 m.
I would say the answer is Pangaea. I got this answer but google searching "all land" means what... and the 3rd or 4th one down it says Answers.com
But i worn you answers.com is a very slow sight...
Hope it helps
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