Abox of weight 135 n is attached to the end of a dangling spring, stretching the spring by 21.0 cm. what is the weight of an object that would stretch the spring by 69.6 cm?

626 n

244 n

41 n

447 n

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:

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

Three resistance 4,4 and 6 ohms are joined in the series.the total resistance will be