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A person notices a mild shock if the current along a path through the thumb and index finger exceeds 80 μA. Find the maximum allowable potential difference without shock across the thumb and index finger for a dry-skin resistance of 4 x 10^5 Ω.
Two carts have a compressed spring between them and are initially at rest. One of the carts has total mass, including its contents, of 7.0 kg, and the other has total mass of 5.0 kg. If the 5.0 kg cart is moving at 3.0 m/s after the spring is allowed..
Three resistors, with values of 3.0, 6.0 and 12.0 ?, respectively, What is the overall resistance of this combination
a 90 ohm resistor has a current of .6A and is connect in series with a 150 ohm resistor. What is the emf of the battery to which the resistors are connected
A well-insulated electric water heater warms 111 kg of water from 20.0° C to 43.0° C in 29.0 min. Find the resistance of its heating element
A basketball of mass 3 kg and radius 0.20 m rolls without slipping down an incline of angle 30 degrees. Calculate the acceleration of the center of mass
A car is traveling at 8.43 km/hr. The tires have a radius R = 38:4 cm. (a) What is the angular speed of the tire (in SI units)? (b) What is the centripetal acceleration (m/s^2) of a piece of tire on the outer edge?
A model rocket is fired vertically from rest. It has a net acceleration of 18.5 m/s2. Ignoring air resistance, how high does the rocket travel
directed into the plane of the computer screen as shown in the figure. Identify the magnitude and direction of the resultant magnetic field at P.
At some instant and location the electric field associated with an electromagnetic wave in vacuum has the strength 86.9 V/m. Find the magnetic field strength
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
In both the Rutherford theory and the Bohr theory, we neglected any wave properties of the particles. Estimate the de Broglie wavelength of an alpha particle and compare it with the size of the nucleus. Is the wave behavior expected to be important i..
Describe how magnetic dipoles of a system of two-state paramagnet behave in a magnetic field and explain why. Describe how the heat capacity, energy, and magnetization of a system of two-state paramagnet depend on temperature.
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