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A 2.08 m long pole is balanced vertically on its tip. It starts to fall and its lower end does not slip. What will be the speed of the upper end of the pole just before it hits the ground?
A ceiling fan with 90-cm-diameter blades is turning at 65 rpm. Suppose the fan coasts to a stop 26 s after being turned off.
A wire 2.80m in length carries a current of 5.00 A in a region where a uniform magnetic field has a magnitude of 0.390T. Calculate the magnitude of the magnetic force on the wire, assuming the angle
This simple demonstration of Einstein's explanation for Brownian motion shows little particles batting about a more massive one, and what it would look like if you could see only the massive one thr
A 48000-kg space probe is traveling at a speed of 12000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 1600
Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 2.00 10-3 rad/s, while the other has an angular speed of 3.40 10-3 rad/s. How l
A sodium-vapor lamp has power output of 10.0 W. Using 589.3 nm as the average wavelength of this source, calculate the number of photons emitted per second.
Question: Two point charges are separated by 10.0 cm and have charges of 2.00 and -5.00 μC, respectively. At what point between the two charges does the E-fields sum to zero? Draw a free body dia
The Dielectric Constant for polystyrene filling is 2.5. A coaxial cable consists of a cylindrical metal sheath with interior radius b=3.2cm surrounding a wire with exterior radius a=0.8cm, with poly
The angular speed is then increased to 12 rad/s over the next 4.0 seconds. Assume that the angular acceleration is constant. What is the magnitude of the angular acceleration of the grindstone?
What are advantages and disadvantages of sumpner's test? why is the reference voltmeter required? what will happen happen if we close the switch if refernce voltmeter is reading 100v?
Compute the reactance of a .450 H inductor at frequencies 60Hz, compute the reactance of a 2.5 uf capacitor at the same frequency, at what frequency is the reactance of a .45H inductor equal to that
Compute the impedance of a series R-L-C circuit at angular frequen2cy of 500 rad/s. R= 200ohms, L=.9 H, and C = 2uf. What is the phase angle of the source voltage with respect to current?
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. The angular frequency of the motion is 6.16x10^4 rad/s. How many times does the diaphrag
A mass of 0.30 on the end of a spring oscillates with a period of 0.45 and an amplitude of 0.15
With the suspension point 30cm from the left edge of the meter stick, hang a 200g mass 10cm from the left edge of the stick. Calculate the mass you must hang at a point 40cm to the right of the pivo
A uniform rope of mass 110 g and length 150 cm hangs from a ceiling. (a) Find the speed of a transverse wave on the rope at 93 cm from the lower end. (b) Find the time a transverse wave takes to tra
Consider two oppositely charged, parallel metal plates. The plates are square with sides L and carry charges Q and -Q. What is the magnitude of the electric field in the region between the plates?
A parallel-plate capacitor has circular plates of radius 20 cm and a uniform electric field between the plates. The capacitor is being charged at a rate of 0.10 A. What is the net displacement curre
A pump discharges a liquid into a drum aat the rate of 0.032 m3/s. the drum,1.5 m in dia and 4.2m in length, can hold 3000 kg of the liquid. Find the density of the liquid and mass flow rate of the
A vacuum cleaner motor can be viewed as an inductor with an inductance of 200 mH. For a 60-Hz AC voltage, Vrms = 120 V,what capacitance must be in series with the motor to maximize the power output
Describe the motion of a ball as it rolls up a slanted driveway the ball starts at 2.5m/s slows down for 5.0s stops for an instant and rolls back down at an increasing speed.
A beam of light in air is incident on the surface of a slab of fused quartz. Part of the beam is transmitted into the quartz at an angle of refraction of 28degrees relative to a normal to the surfa
What is the force per meter on a straight wire carrying 5.0 S when it is placed in a magnetic field of .020 T? Whe wire makes an angle of 27° with respect to the magnetic field lines.
The angular velocity of a flywheel obeys the equation wz(t) = A + Bt^2, where t is in seconds and A and B are constants having numerical values 2.15 (for A) and 1.30 (for B). What is the angular ac