Answer:
KE = 7.7160 GJ
Explanation:
given data
mass = 500 kg
radius = 6394 km
acceleration of gravity = 4.09 m/s²
orbital speed = 20,000 km/h = 20000 × = 5555.56 m/s
solution
we Kinetic energy is express as
KE = 0.5 × m × v² .................1
here m is mass and v is velocity
put here value and we get
KE = 0.5 × 500 × 5555.56²
KE = 7716061728.400
KE = 7.7160 GJ
Answer:
c) 2
Explanation:
When a charged particle is moving in a region with a magnetic field, it experiences a force perpendicular to the direction of motion, therefore it starts moving with a circular motion.
The force experienced by the particle which is moving perpendicular to the field is given by
where
v is the speed of the particle
q is the charge of the particle
B is the strength of the magnetic field
Here we have:
- A proton, which has
(charge)
(speed of the proton)
B is the magnetic field
So the force experienced by the proton is
(1)
- An alpha particle, which has
(charge)
(speed of the alpha particle)
B is the magnetic field
So the force experienced by the alpha particle is
Here we are told that the force experienced by the two particles is the same, so:
And so we get:
Solving for the ratio between their speed, we find: