A mass 
is connected by a light string that passes over a pulley of mass M to a mass 
as shown in the figure. Both masses move vertically and there is no slippage between the string and the pulley. The pulley has a radius of 30.0 cm and a moment of inertia of 
If 
is 4.00 kg, 
is 3.00 kg and M is 6.00 kg, then what is the acceleration of the masses?
A. 0.695 
B. 0.703
C. 0.731
D. 0.754
E. 0.805
D. 0.754
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A pure substance A having density of 800 kg/m^3 (56 lbm/ft^3) is diffusing into a binary mixture of A and B. If the velocity of A is 4 cm/hr (1.2 in/hr) into the mixture and the velocity of B is 3.6 cm/hr out of the mixture, what is the total bulk velocity? Assume that the density of pure B is 900 kg/m3 (63 lbm/ft^3) and that the mixture density is 890 kg/m^3 (61 lbm/ft^3).
What will be an ideal response?
The Luyten 726-8 binary system is approximately 9 light-years away. If we send a spacecraft to visit this system traveling at 90% of the speed of light, how long will a one- way trip take as measured from the Earth?
A) it's impossible to tell unless we know the spacecraft's method of propulsion B) more than 10 years C) 10 years D) less than 10 years
A lab specimen is 15.2 mm from a convex lens. The image is 4.0 mm tall and 9.0 cm from the lens. How tall is the specimen?
A) 6.8 mm B) 5.4 mm C) 1.7 mm D) 0.68 mm
If Q = 20 ?C and L = 60 cm, what is the magnitude of the electrostatic force on any one of the charges shown?
a.
25 N
b.
19 N
c.
15 N
d.
9.1 N
e.
14 N