Monday
December 9, 2013

# Posts by Physics

Total # Posts: 358

Ida
What does duracell manufacture say about the durability of their brand

physics...........
What is the probability that the bulb is glowing for a circuit set up as: |-------------(Bulb)-----------| | | | | (Voltage) | | | | | |----(Switch-1)---(Switch-2)---|

physics
Two identical traveling waves, moving in the same direction, are out of phase by /5.0 rad. What is the amplitude of the resultant wave in terms of the common amplitude ym of the two combining waves? (Give the answer as the ratio of the total amplitude to the common amplitude.)

phyiscs
what is the derivative of velocity squared? i know that the derivative of regular velocity is acceleration, but what about velocity squared? thank you very much!

physics
if the second derivative is not uniform, then is the third derivative also not uniform? thank you!

Physics
A scaffold of mass 50kg and length 5m is supported in a horizontal position by a vertical cable at each end. A window cleaner of mass 70kg stands at a point 2m from one end. Determine the tension in the nearer cable and also the farther cable.

physics
A new type of spring is found where the spring force F is given by F=-kx + bx^2 where k=400 N/ m and b=100 N/m^2 and x is the expansion (or compression) of the spring from its equilibrium position. The spring is attached to a point mass of 1 kg sitting on a horizontal friction...

Physics
A brick of mass 1.0 kg slides down an icy roof inclined at 30.0 degrees with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 2.00 m away? Ignore friction. (b) Redo part (a) if the coefficient of kinetic f...

physics multiple choice
A. Because on a fricitionless horizontal surface any finite mass will accelerate if any finite net force is applied in any direction that is not perpendicular to the said surface.

physics
Pulling up on a rope, you lift a 4.05-{\rm kg} bucket of water from a well with an acceleration of 2.20 m/s^2. What is the tension in the rope?

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