Answer:
51520J
Explanation:
The energy added to the piece of glass is also called heat needed to increase its temperature from 10°C to 50°C and it depends on the mass, specific heat capacity and the change in temperature.
Q=m.c.ΔT
Q=(2kg).(644J/(kg°C)).((50°C)-(10°C))
Q=51520J
Answer:
A DC motor operates because the loop or the coil constantly rotates and therefore creates a torque in the presence of the magnetic field created in between two magnetic poles.
Explanation:
Working of a DC Motor
A DC motor is composed of an armature which is a current carrying coil, placed in between two opposite ends of magnets (North and south poles). This armature works as an electromagnet when places in the magnetic field of two magnet poles.
It thus, experiences a force according to the right hand rule and the torque is created with the interplay of the fixed magnetic field and the flow of current in the armature.
There are two brushes linked with two commutators that are further attached with the ends of the coils. The brushes are directly connected with the two terminals of the battery.
Answer:
False
Explanation:
hertz the SI unit of frequency, equal to one cycle per second.
B is the answer because of its throwing the other 2 have potential energy