Answer:
Specific gravity can be used to determine if an object will sink or float on water. ... If an object or liquid has a specific gravity greater than one, it will sink. If the specific gravity of an object or a liquid is less than one, it will float.
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Answer:
Part a)
Part b)
Part c)
Explanation:
As we know that 5000 kg African elephant requires 70,000 Cal for basic needs per day
so we will have
so we have energy required per kg
Part a)
now we know that per kg the energy required will be same
so we have mass of the human is 68 kg
so energy required per day is given as
Part b)
Resting power is the rate of energy in Joule required per sec
so it is given as
Part c)
resting power given in the book is
so this is less than the power given
Answer:
168.32 mile
Explanation:
1 mile = 1.61 km
1.61 km = 1 mile
1 km = 1 / 1.61 mile
So, 271 km = 271 / 1.61 = 168.32 mile
Answer:
a)
Now we can replace the velocity for t=1.75 s
For t = 3.0 s we have:
b)
And we can find the positions for the two times required like this:
And now we can replace and we got:
Explanation:
The particle position is given by:
Part a
In order to find the velocity we need to take the first derivate for the position function like this:
Now we can replace the velocity for t=1.75 s
For t = 3.0 s we have:
Part b
For this case we can find the average velocity with the following formula:
And we can find the positions for the two times required like this:
And now we can replace and we got: