ЗАДАЧА 3 Електрически чайник със съпротивление 100 е
включен към напрежение 220 V. Определете:
а) какво количество топлина в kJ се отделя за 2 min;
б) с колко ще се промени мощността на чайника, ако се включи
към напрежение 120 V.
Търси се:
с

Could someone . i have tried to solve myself but my calculation is off

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: