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A simple pendulum made 120 oscillations in 3 minutes at a location on the earth where g=9.8m/s^2. What is the time period of the pendulum? What is the length of the pendulum? Show all work.
The Russian sub sends out a sonar signal at 1110 Hz. Sonar waves travel at 5470 km/h. a.) What is the signal's frequency as detected by the US sub?
Draw a PV diagram of the process. Label the initial state of the gas with an "I" and the final state with an "F". Assume the process follows a linear path.
A mass m at the end of a spring vibrates with a frequency of .88 Hz. When an additional 680g mass is added to m, the frequency is .6Hz. what is the value of m? Show all work. Draw a diagram.
The glass core of an optical fiber has an index of refraction 1.61. The index of refraction of the cladding is 1.47. What is the maximum angle a light ray can make with the wall of the core if it is
Neglecting frictional forces on the trailer, determine the following. (Indicate the direction with the sign of your answer. Take the forward direction to be positive.) the net force on the trailer
A system is devised to exert a constant force of 8 N on an 80-kg body of mass initially at rest. The force pushes the mass horizontally on a frictionless table. How far does the body have to be push
A spelunker enters a cave. Consider the entrance to the cave the origin. the spelunker then moves east for 100 ft, then moves 100 ft at 60 degrees North of West before finally moving 100 ft at 30 de
What is the magnitude of the potential difference DeltaV between the two spheres?
A sailboat is being propelled westerly by the wind at a speed of 4 m/s. If the current is flowing at 2 m/s to the northeast, where wil the boat be in 10 minutes in respect to the starting position?
A proton accelerates from rest in a uniform electric field of 680 N/C. At some later time, its speed is 1.40 multiplied by 106 m/s. (a) Find the magnitude of the acceleration of the proton.
Three resistors are connected in series across a 15-V power supply. If the potential drop across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the potential drop (in volts) across resistor
If you wanted to move an electron from the positive to the negative terminal of the battery, how much work W would you need to do on the electron?
A bullet of mass 0.024 kg is fired horizontally with a speed of 75 m/s from a tall bridge. If the bullet is in the air for 2.3s, how far from the base of the bridge does it land?
A 1500 kg car drives around a flat 200 m diameter circular track at a constant speed of 25 m/s. a) What is the magnitude and direction of the acceleration on the car? b) What is the magnitude and di
A cannon barrel is elevated at an angle of 45°. It fires a ball with a speed of 346 m/s. (For the following questions, ignore air resistance.) (a) What height does the ball reach?
You have book A (6kg) which sits on top of book B (15kg) which sits on top of a table (30 kg). a) Draw a free body diagram of each block and the table (clearly label each force that you drew on each
What is the electric potential energy of an electron at the negative end of the cable, relative to the positive end of the cable?
An electron, initially traveling in the +x-direction with a speed of 4 x 105 m/s, enters a uniform electric field directed vertically upward. After traveling in this field for 3.5 x 10-7 s, the electr
You move the box with a constant velocity of 3 m/s. The coefficient of friction is 0.4. a) Draw a free body diagram. b) What is the new tension in the rope (it will not be 200 N).
A circular piece of diameter 8.00 cm is cut from an aluminum sheet at 20o C. If the sheet is then placed in an oven and heated to 150o C. (a) will the hole be larger or smaller? (b) What will the ar
Air surrounds any object on all sides. Even if an object is resting on a surface there is always air (even if only a thin layer) underneath.
An aluminum tape measure is accurate at 20o C. If the tape measure is placed in a deep freeze at -5.0o C, what would be the tape measure's percentage error because of thermal contraction? Would it r
A dock worker applies a constant horizontal force of 76.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 11.0 m in the fir
The floor is not frictionless. You move the box so that it moves with a constant velocity of 3 m/s by applying a 200 N force. a) Draw a free body diagram of the box. b) Find the coefficient of frict