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A well insulated rigid vessel also contains 3 kg of saturated liquid water at 40 oC. Determine the final temperature in the vessel after the resistance has been operating for 20 minutes
When a 14.4-V car battery delivers a current of 60.0 A, the power consumed on its internal resistance is 36.0 W, what is the internal resistance of the battery
A 0.39 V potential di?erence is maintained across a 1.7 m length of tungsten wire that has a cross-sectional area of 0.85 mm2, What is the current in the wire
As a treatment for chronic back pain, a medical patient may be fitted with a device that passes a small electrical current , how many electrons pass through the muscles during one pulse
A small glass bead charged to 6.9nC is in the plane that bisects a thin, uniformly charged, 10-cm-long glass rod, What is the total charge on the rod
A roach that runs for its life because you try to hit it with your physics book runs off the horizontal tabletop with a speed of 0.685 m/s, What will be the vertical component of the roach's velocity
Start with the thin lens equation and solve for the image distance in terms of the focal length and object distance. Use this to explain why you can expect a real image only
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction, Find the direction of the third force acting on the object
A parallel plate capacitor has plates 2.00 cm by 3.00 the plates are saparated by a 1.00 m thickness of teflon. find the capacitance of this device
An ideal Voltmeter is connected across the terminals of a 12 Volt battery and a light bulb with R = 4.5 ohms is also connected across the battery terminals, Find the power generated by the Emf of th
A mass m1 = 3.8 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 5.5 kg which hangs freely from the string, What is the tension in the
A certain person can see clearly objects at distances between20cm and 250cm from his eyes, what will be his least distance of distinct vision, when he is wearing the spectales
A narrow beam of light is incident normally on one face of equiangular glass prism of RI 1.45. Find the refractive index of this liquid and draw a diagram showing the path of rays
Given a configuration of three charged particles such that q1= 5.30 nC at (1.50 m, 0.0 m), q2= 9.20 n C at (0.00 m, 2.00 m) and q3= -2.40 nC at the origin
A refrigerator has a 1000 W compressor, but the compressor runs only 20% of the time, If electricity costs $0.10/kWh, what is the monthly (30 day) cost of running the refrigerator
A 15 ohm resistor is connected to the terminal of a 12 V battery, Sketch the circuit and Calculate the current in the circuit
A small object with mass 0.200 kg moves with constant speed in a vertical circle of radius 0.500 m. It takes the object0.150 s to complete one revolution, What is the translational speed of the obje
A spherical cavity is excised from the inside of the sphere. The cavity has radius a4and is centered at position h, Find the electric field inside the cavity
You do a physics lab experiment on another planet. A small block is released from rest at the top of a long frictionless ramp that is inclined at an angle of 36.9° above the horizontal, What is
A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, What is the initial current through the patient
The "Giant Swing" at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end, Find the time of one revolution of the swing if the cable supportin
You are called as an expert witness in the trial of a traffic violation. The facts are these: A driver slammed on his brakes and came to a stop with constant acceleration, How fast was he going when
What must be the mass m2 of the hanging block if it is to descend 11.0m in the first 3.00s after the system is released from rest
A falling skydiver of mass 86.0 kg accelerates downward at 6.7 m/s2. What is the upward force due to air resistance
You push a 2.7 kg box with a force of 23.8 N along a level floor, but a frictional force of 3.3 N opposes the motion