Hey pls a lot
5. a force f of magnitude 8.20 n acts at an angle of
30°on a non-uniform rod of weight 10.0 n and
length 1.00 m freely hinged to a wall at pivot p,
such that the rod remains horizontal. find d, the
distance of the centre of gravity of the rod from p?
(a) 0.410 m
(c) 0.710 m
(b) 0.500 m
(d) 0.820 m

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

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 are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.