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Determine whether the image formed is real or virtual and upright or inverted. an upright pencil placed 35.2 cm from the mirror. What is the magnification?
Write an approximate expression for T^2 for low-energy electrons in the potential of problem 12
The speed of the mass at the top of that swing is 3.50m/s. what is the speed of the mass at the bottom of the swing?
A spring whose stiffness is 920 N/m has a relaxed length of 0.54 m. If the length of the spring changes from 0.32 m to 0.78 m, what is the change in the potential energy of the spring? ΔU = ?
The 8% loss is not noticed through a single sheet, but, through several sheets, the loss is apparent. How much light is transmitted by a "double-glazed" window.
What is the kinetic energy in joules of a 930-kg automobile traveling at 97 km/h?
A Ferris wheel with a radius of 12.0 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
Hydrogen with one proton and two neutrons. You look up the charge of a proton and mass of the tritium in your trusty Physics text to be 1.6 x 10-19 C and 5.0 x 10-27 Kg.
what is the resistance of the parallel combination. B)what is the total current through the parallel combination. C) what is the current through each resistor.
Two 2.0 g spheres are charged equally and placed 1.6 cm apart. When released, each begins to accelerate at 205 m/s2. What is the magnitude of the charge on each sphere?
Two playmates are already on either end. Boy A has a mass of 50 kg, and girl B a mass of 35 kg. Where should girl C, whose mass is 25 kg, place herself so as to balance the seesaw?
A copper wire is 0.60 meter long and has a diameter of 0.10 cm. What is the resistance of the wire?
In the first-order spectrum, maxima for two different wavelengths are separated on the screen by 3.40 {rm mm}. What is the difference between these wavelengths?
What is the magnitude of the magnetic field within the substance? What is the magnitude of the magnetization?
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m (9ft ) is connected to an electric heater which draws 13.0 A on a 120-V line. How much power is diss
An average friction force of 4.0 x 103 N impedes the car's motion so that its speed at the bottom of the driveway is 3.8 m/s. What is the length of the driveway?
Afterward, three beats per second are heard when the strings vibrate at the same time. What is the new frequency of the string that was tightened?
An object has a kinetic energy of 327 J and a momentum of magnitude 29.9 kg·m/s. Find the speed and the mass of the object.
Assuming that only 80 % of the electrical energy is dissipated in the wire and remains there, find the final temperature of the wire. Note that the specific heat capacity of iron is 452 J/Kg C.
A microphone is placed 3.20m distant from a point midway between the two speakers, where an intensity maximum is recorded. How far must the microphone be moved to the right to find the first intensity
The hiker ends up back where at the original starting point, so the reslultant displacement is zero or A+B+C=0. Find the magnitudes of Vectors B and C.
You are riding in an elevator on the way to 18th Floor in your dormitory. The elevator is accelerating upward with a = 1.90 m/s². Beside you is the box containing your new computer; box and co
A dentist uses a small mirror of radius 45 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 14 mm from the tooth, what is the magnification of the resulting image?
A rocket engine emits 2.0 X 10^5J of sound energy every second. The sound is emitted uniformly in all directions. What is the sound intensity level, measured relative to the threshold of hearing, a
How many logs will be needed to keep them afloat in fresh water? Take the density of the logs to be 800 kg/m^3.