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A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end just before it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin rod and use the conservation of energy principle.)
The red line of the Balmer series in hydrogen (? = 656.3 nm) is observed to split into three different spectral lines with ?? = 0.07 nm between two adjacent lines when placed in a magnetic field B. What is the value of B if ?? is due to the energy sp..
A 10.0 g object moving to the right at 22.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 34.0 cm/s
If the Earth were to suddenly stop revolving around the Sun the gravitational force that the Sun exerts on the Earth would cause the Earth to "fall" directly into the Sun
An object of mass 3m0 moves to the right at 0.8c. Calculate its momentum and energy
A factory worker pushes horizontally to the right on a 250 N crate with a force of P = 75.0 N on a horizontal rough floor. A 135 N crate rests on top of the one being pushed and moves along with it. Call the bottom crate {rm A} and the top crate {..
The planet Earth travels in a circular orbit at constant speed around the Sun. What is the net work done on the Earth by the gravitational attraction between it and the Sun in one complete orbit? Assume that the mass of the Earth is given by , the ma..
A car decelerates uniformly and comes to a stop after 10s. The car's velocity was 50 km/h. What was the car's deceleration
Arranged on the floor are five concrete blocks, each 28.4kg and 0.265m tall. What is the minimum work required to stack all five vertically
A 45cm radius insulated sphere is charged so that the volume charged density is a function of the radius: Charge denisty=(34microC/m^4)r. Integrate to determine the total charge on the sphere.
The ammonia molecule NH3 has a permanent electric dipolemoment equal to 1.31 D, where 1 D = 1debye unit = 3.34 multiplied by10-30 C·m. Calculate the electric potential dueto an ammonia molecule at a point 51.0 nmaway along the axis of the dipole. (S..
In the figure below, the converging lens' focal length is 14.4 cm, d = 13.6 cm, and the diverging lens' focal length is -14.1 cm. Where is the image formed by the converging lens,
A cosmic ray travels 60 {\rm km} through the earth's atmosphere in 420 \mu s, as measured by experimenters on the ground
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