An object with a mass of 30 KS (300N) is suspended from the two ropes. Each rope makes an angle of 30 degrees from the vertical. The angle between each rope is 60 degrees. What is the
tension in each rope? Scale 10cm=300N (F.:=mg g=10m/s)
60°

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

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:

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.