Answer:
this hurts my brain. bro i'm going into physics next year and im over here think physics is easy well you just proved me wrong
Explanation:
Electromagnets are used in all kinds of electric devices, including hard disk drives, speakers, motors, and generators, as well as in scrap yards to pick up heavy scrap metal. They're even used in MRI machines, which utilize magnets to take photos of your insides!
Answer:
B = 6.18 10⁻⁶ T
the magnetic field is in the negative direction of the y axis
Explanation:
The magnetic force is given by
F = q v x B
as in the exercise indicate that the velocities perpendicular to the magnetic field,
F = q v B
Newton's second law is
F = m a
let's substitute
q v B = m a
B = m a / q v
let's calculate
B = 9.1 10⁻³¹ 2.50 10¹³ / (1.6 10⁻¹⁹ 2.30 10⁷)
B = 6.18 10⁻⁶ T
The direction of the field can be obtained with the right hand rule, where the thumb points in the direction of the velocity, the fingers extended in the direction of the magnetic field and the palm in the direction of the force for a positive charge.
In the exercise indicate that the velocity is the z axis
the acceleration and therefore the force in the x axis
therefore the magnetic field is in the negative direction of the y axis
Circuit breaker is a device that is designed to open an overloaded circuit and prevent overheating. The correct option in regards to the given question is option "a". The main purpose of the circuit breaker is to disconnect the defective switch from the circuit as soon as any problem arises. This helps in preventing any kind of major accident. Overheating can result in a big accident and the circuit breaker is the device that senses the overheating and disconnects the switch before any major incident. It is an automated system that acts as a protective devise.
Answer:
Speed of canon ball = V = 89.443 m/s
Explanation:
the spring potential energy will be converted into kinectic energy
M= mass of cannon
m= mass of cannon balls
k= 2.0*10^4 N/m
compression x= 0.56 m
0.5kx^2 = 0.5Mv^2
2 x 10^4 x 0.56^2 = 250 x v^2
Speed of canon = v = 5.008 m/s
Now,
we have, by momentum consevation
m x 0 + M x 0 = mV - Mv
0 = 14 x V - 250 x 5.008
Speed of canon ball = V = 89.443 m/s