Answer:
The heater power required is 2400 W. The power in the heater can be calculated as the product of the voltage line and the steady current:
Explanation:
Wood is an insulator, so the wood doesn’t heat up.
Answer:
The points 2 and 4 should be connected.
Explanation:
To complete the circuit, we need to connect the two points which when connected, encompass the battery and the bulb in the circuit. The points 2 and 4 do the job, since they connect the terminal of the battery and the terminal of the bulb, and thus complete the circuit.
Therefore, the choice C is correct.
Answer:22 m/s
Explanation:
Given
launch angle
height of goal
and horizontal distance
Suppose initial speed is
Trajectory of a Projectile is given by
substituting the values we get
So, initial launch speed is