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The RC circuit has 4 kΩ and C= 2 µF. The capacitor is at Voltage V at t=0, when the switch is closed. Find how long does it take the capacitor to discharge 9 percent of its initial voltage?
A nuclear power plant has a reactor that produces heat at the rate of870MW. This heat is used to produce260MW of mechanical power to drive an electricalgenerator. What is the thermal efficiency of the plant
A 70 kg meteorite buries itself 5.5m into soft mud. The force between meteorite and the mud is given by F(x) = (680 N/m^3)x^3, where x is the depth in the mud. What was the speed of the meteorite when it firstly impacted the mud.
A microscope with an eyepiece lens of focal length 1.90 cm and an objective lens of focal length 1.15 cm is used to examine a section of the brain of a sacrificed rat. The distance between the lenses of the instrument is 24.0 cm and final image is vi..
A glass lens (nglass = 1.52) has a 136 nm thick anti-reflective film (nfilm = 1.33) on one side. What is the largest wavelength of the light that is totally removed by the film
a 2 kg uniform flat disk is thrown into the air with a linear speed of 10 m/s. As it travel the diak spins at 3.0 rev/s. what is the magnitude of its angular momentum
A helicopter rises vertically, carrying a load of concrete to make the foundation for a ski lift. Find what is the helicopter acceleration
A rifle is aimed horizontally at a target 47.0 away. The bullet hits the target 1.80 below the aim point. Evaluate the bullet's flight time? What was the bullet's speed as it left the barrel?
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 2.6 x 10-7 C/m2, the plates are separated by a distance of 1.4 x 10-2 m. How fast is the electron moving just before..
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
at the moment t 0 a stationary particle of mass m experiences a time-dependent force f at t - t where a is a constant
A Goodyear blimp typically contains 5400m3 of helium (He) at an absolute pressure of 1.1multiplied by 105 Pa. What is the mass of the helium in the blimp
A body moves in a straight line with the square of its velocity being a linear function of displacement, s as follows: v2=A+Bs, where A=4m2/s2 and B=0.4m/s2. Calculate the body’s acceleration, a and the distance traveled for the last 2sec before it r..
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