Two test tubes are filled with a solution of bromthymol blue. A student exhales through a straw into each tube, and the bromthym
1 answer:
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Answer:
The correct answer is option 'c': 30 AUs
Explanation:
For a spherical wave front emitted by sun with total energy 'E' the energy density over the surface when it is at a distance 'r' from the sun is given by
This energy per unit area is sensed by observer as intensity of the sun.
Let the initial intensity of sun at a distance be
Thus if the sun becomes 900 times dimmer we have
Thus the distance increases 30 times.
Answer:
8512 N
Explanation:
From the work energy theorem we know that: The net work done on a particle equals the change in the particles kinetic energy:
Where:
-W is the work done by the force.
- F is the force actin on the.
- d is the distance travelled.
- m is the mass of the car.
- are the final and the initial velocity of the car
are the final and the kinetic energy of the car.
Givens:
Plugging known information to get: