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Electromagnetic waves travel through space with a speed of 3.0x10 to the eighth power meters per second. The frequency of microwaves with a wavelength of 3.0cm is how many hertz?
A crate weighs 10 Newton and is being pulled along the floor a constant velocity with a force of 2 Newton. Estimate what the coefficient of static friction
How far does light travel in one year?( This distance is known as a light-year and is utilized in measuring astronomical distances)______km Approximately how long would it take for a telephone signal to travel 1000mi?( telephone signals travel at abo..
The x -component of the velocity of an object vibrating along the x - axis obeys the equation vx(t)= (0.445 m/s) sin [(25.4rad/s)t + 0.223]. Find the maximum acceleration of the vibrating object
An ideal massless spring is hanging vertically. When a 0.75-kg mass is attached to the spring, What is the frequency of the resulting oscillation
A potential difference of 14 V is found to produce a current of 0.39 A in a wire of length 3.1 m with a uniform radius of 0.44 cm. What is the resistivity of the wire
The surface charge density on an infinite charged plane is -2.3 10-6 C/m2. How far does the proton travel before reaching its turning point
A hydrogen atom, initially at rest, emits an ultraviolet photon with a wavelength of \lambda = 122nm. What is the recoil speed of the atom after emitting the photon
Once the freezing is complete, the temperature of the resulting ice continues to drop, reaching temperature TB after an hour. The following specific heat and latent heat values for water may be helpful. How much energy must be transferred out of t..
The function x = (3.8 m) cos[(3? rad/s)t + ?/4 rad] gives the simple harmonic motion of a body. At t = 3.7 s, what are the (a) displacement, (b) velocity, (c) acceleration, and (d) phase of the motion? Also, what are the (e) frequency (in Hz) and (f)..
A sledge loaded with bricks has a total mass of 18.3 kg and is pulled at constant speed by a rope inclined at 19.7° above the horizontal. What is the mechanical energy lost due to friction
A 2.90mW helium neon laser emits a visible laser beam with a wavelength of 635nm. How many photons are emitted per second
For some applications, it is important that the value of a resistance not change with temperature. What value should the carbon resistor have
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