A driver in a car traveling at a speed of 21.8m/s sees a cat 101 m away on the road. How long will it take for the car to accele
2 answers:
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Complete Question
A 100-W (watt) light bulb has resistance R=143Ω (ohms) when attached to household current, where voltage varies as V=V0sin(2πft), where V0=110 V, f=60 Hz. The power supplied to the bulb is P=V2R J/s (joules per second) and the total energy expended over a time period [0,T] (in seconds) is
Compute U if the bulb remains on for 5h
Answer:
The value is
Explanation:
From the question we are told that
The power rating of the bulb is
The resistance is
The voltage is
The energy expanded is
The voltage
The frequency is
The time considered is
Generally power is mathematically represented as
=>
=>
So
=>
=>
=>
=>
=>
=>
Answer: The total momentum before the docking maneuver is and after the docking maneuver is
Explanation:
Linear momentum (generally just called momentum) is defined as mass in motion and is given by the following equation:
Where is the mass of the object and
its velocity.
According to the conservation of momentum law:
<em>"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision </em> <em>will be the same as the total momentum of these same two objects after the collision </em>
<em>".
</em>
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This means, that although the momentum of each object may change after the collision, the total momentum of the system does not change.
Now, the docking of a space vehicle with the space station is an inelastic collision, which means both objects remain together after the collision.
Hence, the<u> initial momentum</u> is:
Where:
is the mass of the vehicle
is the velocity of th vehicle
is the mass of the space station
is the velocity of the space station
And the <u>final momentum</u> is:
Where:
is the velocity of the vehicle and space station docked