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A person travels by car from one city to another with dissimilar constant speeds between pairs of cities. She drives for 30mins at 80 km/h, 12 min at 100 km/h, and 45 min at 40 km/h and spends 15 min eating lunch and buying gas. (a) Decide the average speed for the trip (b) Decide the distance among the initial and final cities along the route.
The K series of the discrete x-ray spectrum of tungsten contains wavelengths of 0.018 5 nm, 0.020 9 nm, Determine the ionization energies of the L, M, and N shells
A uniform spherical shell of mass M = 2.5 kg and radius R= 18.0 cm rotates about a vertical axis on frictionless bearings. A mass less cord passes around the equator of the shell, over a pulley of rotational inertia I = 3.63×10-3kg m2 and radius r = ..
A beam of electrons is accelerated from rest and then passes through a pair of identical thin slits that are 2 nm apart. Calculate the speed of the electrons
An electron with velocity v = (300, 200, 0) m/s moves in a region where the magnetic feild is B = (0, 1.2, 2.8) x 10^-4 T. Determine the force on the electron
The light shining on a diffraction grating has a wavelength of 490 nm (in vacuum). How many lines per centimeter does the grating have
you are a police officer. your squad car is at rest on the shoulder of an interstate highway when you notice a car
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated power numerically, to the nearest 10 W
A 7.80-g bullet moving at 550 m/s penetrates a tree trunk to a depth of 6.1 cm. Use work and energy considerations to find the average frictional force that stops the bullet
What inductor connected in series with a 200 Ohm resistor and a 20 pF capacitor will give a resonance frequency of 1000 Hz
A proton is moving with an initial velocity of 6.28 x 10^5 m/s straight towards a large conducting sphere of radius 85.2 cm. What is the voltage on the surface of the sphere
The drawing shows a person (weight W = 582 N, L1 = 0.841 m, L2 = 0.406 m) doing push-ups. Find the normal force exerted by the floor on each hand
A 65 kg woman steps off a 10 m driving platform and drops straight down into the water. If she reaches a depth of 4.5 m, what is the average resistance force exerted on her
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