A space shuttle with a mass of approximately 7.08 E5 kg is sitting on the launch pad. What would be the weight of the space shut
1 answer:
The weight of the shuttle is
Explanation:
The weight of an object on Earth is the gravitational force exerted by the Earth on the object.
The magnitude of the weight of an object is given by:
where
m is the mass of the object
is the acceleration of gravity on Earth's surface
And the direction is downward (towards the Earth's centre).
For the shuttle in this problem, its mass is
So, its weight is
Note that while the mass of an object (m) does not change, its weight (W) changes according to the location, since the value of g can be different at different location (for example, on the Moon, the value of g is about 1/6 the value of g on the Earth).
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A) The change in internal chemical energy is
B) The time needed is 1 minute
Explanation:
First of all, we start by calculating the power output of you and the bike, given by:
where
F = 80 N is the force that must be applied in order to overcome friction and travel at constant speed
v = 8.0 m/s is the velocity
Substituting,
The energy output is related to the power by the equation
where:
P = 640 W is the power output
E is the energy output
is the time elapsed
Solving for E,
Since the body is 10% efficient at converting chemical energy into mechanical work (which is the output energy), this means that the change in internal chemical energy is given by
B)
From the previous part, we found that in a time of
t = 30 min
the amount of internal chemical energy converted is
Here we want to find the time t' needed to convert an amount of chemical energy of
So we can setup the following proportion:
And solving for t',
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Answer:
The time taken is
Explanation:
From the question are told that
The speed of the incoming water is
The cross-sectional area of the host pipe is
Generally the rate at which the container is been filled is mathematically represented as
=>
=>
Generally
Generally the time taken is mathematically represented as
=>