A jeweler is determining the optical properties of an unknown blue gemstone. She uses an angle of incidence of 62°, and measures
1 answer:
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Answer:
1.70 J
Explanation:
The heat dissipated is the difference in the kinetic energies.
This is given by
and
are the initial and final velocities.
With <em>m</em> = 0.175 kg,
The negative sign appears because energy is lost.
Answer: 815.51 m
Explanation:
This situation is related to projectile motion or parabolic motion, in which the initial velocity of the bullet has only y-component, since it was fired straight up. In addition, we are dealing with constant acceleration (due gravity), therefore the following equations will be useful to solve this problem:
(1)
(2)
Where:
is the final velocity of the bullet
is the initial velocity of the bullet
is the acceleration due gravity, always directed downwards
is the time
is the vertical position of the bullet at
Let's begin by finding from (1):
(3)
(4)
Now we have to substitute (4) in (2):
(5)
Isolating :
This is the displacement of the bullet after 6.9 s
Answer:
Current in the wire is given as
Explanation:
magnetic field due to long current carrying wire is given as
so we have magnetic force on moving charge is given as
so we have
so we have