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A constant force of 25 N is applied as shown to a block which undergoes a displacement of 7.5 m to the right along a frictionless surface while the force acts. What is the work done by the force?
A block of mass M=0.20 kg is attached to a spring with force constant k=12.0 N/cm. Calculate the period the resulting oscillations and the total energy of the system assuming no damping
a uniforn electric field with a magnitude of 420n/c pointing in the positive x- direction acts on an electron, which is initially at rest. The electron has moved 2.60cm. What is the velocity of the electron
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 14.9 rad/s. What is the angular speed of the wheel at the higher temperature
A coil with 41 turns of wire is wrapped on a frame with a square cross-section 1.85 cm on a side. Find the magnitude of the induced current in the coil while the field is changing
An individual uses a pulley and rope to raise a 25 kg mass to a height of 2.0 m. If it takes 5.0 seconds to do this, how much power was supplied
A laser beam is incident at an angle of 29.2° to the vertical onto a solution of corn syrup in water. what is the index of refraction of the syrup solution
Two batteries of emf and internal resistance e1,2 and r1,2 are connected in parallel. Find the effective emf and internal resistance
A ball is thrown straight upward with an initial speed of 25 m/s. how high does the ball go before falling back down
A cylinder contains 1.85 mol of helium gas at 18.5°C. Assume that the helium behaves like an ideal gas. What is the average kinetic energy per molecule
The highest barrier that a projectile can clear is 14.6 m, when the projectile is launched at an angle of 17.0° above the horizontal. What is the projectile's launch speed
An x-ray tube is operated at 45000 V. Find the minimum wavelength of the radiation emitted by this tube
Three blocks with masses m1=5kg, m2=10kg and m3=7kg are connected by two pieces of very light strings. Find the tensions in both pieces of string
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