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In the Bohr theory of the hydrogen atom, an electron moves ina circular orbit about a proton. The radius of the orbit is0.53*10^-10m.
a) Find the electrostatic force acting on each particle.
b) If this force causes the centripetalacceleration of the electron, what is the speed of the electron?
A space probe is traveling in outer space with a momentum that has a magnitude of 7.5 x 10^7 kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0 x 10^6 N and has a direction opposite t..
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
Seven grams of water are placed in a 2.03 liter pressure cooker and heated to 488 deg C. What is the pressure inside the container
A charge of -2.05 nC and a charge of -6.20 nC are separated by a distance of 70.0 cm. Find the position at which a third charge of +7.20 nC can be positioned ( from the -2.05 nC charge) so that net electrostatic force on it is zero.
A simple pendulum has a length of 0.70 m and a mass of 0.75 kg. Calculate the quantum number for the pendulum
A 9.5 gram bullet hits a 5.4 kg block in collision as shown in the figure such that the block is free to rotate as a pendulum. what would be the final height of the block
An RCL circuit connected in series has R=180 ohms, C=1/280 farad, L=20 henries, and an applied voltage E(t)=10sin(t). find the subsequent charge on the capacitor
A 5,20 g bullet moving at 672 m/s strikes a 700 g wooden block at rest on a frictionless surface. What is the speed of the bullet-block center of mass
A 1.49 kg ball is connected by means of two ideal strings to a vertical, rotating rod. The strings are tied to the rod and are taut. What is the tension in the lower string
A dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.0 multiply.gif 104 rev/min. Determine the angle (in radians) through which the drill rotates during this period
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 1.25 rad/s^2. What is the angular speed after the wheel has turned an angle of 948 rad
The energy flow per unit time per unit area (S) of an electromagnetic wave has an average value of 601 mW/ m2
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