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A commuter train blows its horn as it passes a passenger platform at a constant speed of 60.0 m/s. What is the frequency observed by a person on the platform as the train approaches
What current flows through a 2.54 cm diameter rod of pure silicon that is 19.0 cm long, when 1000 V is applied to it
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 8°C. 20 Hz
Find the standard matrix of T and compute the area of the image of S under the mapping x-> T(x)
If the swimmer starts at rest, slides without friction, and descends through a vertical height of 2.41 m, what is her speed at the bottom of the slide
The focal length of the eyepiece of a certain microscope is 18.0 mm. The focal length of the objective is 7.8 mm. find the overall angular magnification of the microscope
A square plate of copper with 35.0-cm sides has no net charge and is placed in a region of uniform electric field of 60.0 kN/C directed perpendicularly to the plate. find the total charge on the pos
A large, flat, horixontal sheet of charge has a charge per unit area of 8.5%u03BCC/m^2. Find the electric field just above the middle of the sheet
An infinitely-long, uniformaly charged line of charge with linear charge density x=0.1_C/m lies a distance d=0.068_m from the center of a sphere with radius R = 0.23_m. What is the amount of charge
A pyramid with horixontal square base, 5.5 m on each side, Calculate the total electric flux through the pyramid four slanted surfaces
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.72 x 10^-6 T. What is the intensity S of the wave
An oscillating LC circuit has a current amplitude of 10.5 mA, a potential amplitude of 276 mV, and a capacitance of 240 nF. What are the maximum rate at which the inductor gains energy
In Rutherfords famous scattering experiments thats led to the planetary model of the atom, How close does the alpha particle get to the gold nucleus before turning around
The force given by the wind pushes the ship towards North by a velocity of 40 kmph. The ocean current on the other hand, determine the ship's actual velocity
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
A 1.8-m-long steel wire in a musical instrument has a radius of 0.02 mm. When the wire is under a tension of 88 N, how much does its length change
How much force is the air exerting on the front cover of your textbook? (Assume that the width and the length of the book are20.3 cm and 28.0 cm, What mass has a weight equivalent to this force
A 19-kg chandelier is suspended from the ceiling by four vertical steel wires. Each wire has an unloaded length of 5 m, how far do the wires stretch
You are driving along the street at the speed limit (35mph) and 50 meters before reaching a traffic light you notice it becoming yellow. What is your speed as you cross the intersection
A 200 g ball of putty falls vertically into a 2.50 kg cart that is rolling freely at 2.00 m/s on a horizontal surface. What is the final speed of the cart
A parallel plate air filled capacitor having area 40cm^2 and plate spacing 1.0mm is charged to a potential difference of 600V. find the energy density between the plates
Where does the energy of an objects inertia come from. You can throw a ball, And how is the ball interacting with the space around it to be moving in the first place?
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 151? C. Boltzmann's constant is 1.38066 × 10?23 J/K, What is the rms speed of argon
A 6.50%u03BCF capacitor that is initially uncharged is connected in series with a 4700%u03A9 resistor, Just after the circuit is completed, what is the voltage drop across the capacitor
two blocks are connected by a string over a disk-shaped pulley with mass M8.5 kg and outermost readuis R = 0.10m. Calculate the acceleration of the hanging block