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A beam of protons, each with kinetic energy 40 MeV, approaches a step potential of 30 MeV.
a. What fraction of the beam is reflected and what fraction transmitted?
b. How does your answer change if the particles are electrons?
A sound wave has a frequency of 677 Hz in air and a wavelength of 0.50 m. What is the temperature of the air
A 0.020-kg bullet is shot horizontally and collides with a 1.35-kg block of wood. The bullet embeds in the block, what was the original speed of the bullet
What frequency will hear after the train passes
What is the speed of the runner. What is the total translational kinetic energy of gas molecules.
A 2{rm kg} box rests on a plank that is inclined at an angle of 65 ^circ above the horizontal. The upper end of the box is attached to a spring with a force constant of 390 N/m.
The mass of Pluto is 0.0025 times that of earth, and its radius is 0.180 times that of earth. Calculate the acceleration of gravity at the surface of Pluto
A logic circuit has two 2-bit unsigned binary numbers X[1:0] and Y[1:0] as the inputs and it has two 1-bit outputs. One of the outputs is ONE_GTR and the other is X1_XOR_Y1.
We pass a laser beam through a double slit. On a screen 18.52 m away, we observe a series of bright lines which are 3.4 mm apart. What is the distance between the two slits
A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.
compute the tension in a string that whirls a 2kg toy in a horizontal circle of radius 2.5m when it moves at 3m/s
A squirrel has x- and y-coordinates ( 1.4m , 3.3m ) at time t1=0 and coordinates ( 4.8m , -0.40m ) at time t2 = 2.7s, Find the magnitude of the average velocity
The auditory canal, leading to the eardrum, is a closed pipe 2.8 cm long. Find out the approximate value (ignoring end correction) of the lowest resonance frequency.
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