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The light shining on a diffraction grating has a wavelength of 490 nm (in vacuum). The grating produces a second-order bright fringe whose position is defined by an angle of 9.85°. How many lines
If an electron of mass 9.1 E-31 kg is released from rest from the negatively charged plate and strikes the positive plate with a speed of 4xE6m/s. Calculate the potential difference between the tw
Consider an RL circuit with resistance R = 3 MO and inductance L = 6 H, which is powered by a 10.-V battery.
A closely wound coil has a radius of 6.30 cm and carries a current of 1.70 A. How many turns must it have if, at a point on the coil axis 6.30 cm from the center of the coil, the magnetic field is 7
A parallel plate capacitor has 2.5cm^2 plates that are separated by 2mm in a vacuum. If a potential difference of 100V is connected to the capcitor, calculate its capacitance and charge on each
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. The tree is 24 m tall and 85 m away. What is the size of the image of the tree on your retina? (Be careful about the s
The speed of sound does not depend on the loudness or the frequency of sound. The speed of sound in dry air 0 degree celsius is 330 m/s. Explain how temperature and humidity affect the speed of soun
An observer on earth measures the first to have a speed .85c and observes the second to be 1.48 times as long as the first one. What is the speed of the second spaceship?
Name the principle that accounts for the change in pitch as the train approaches and departs the crossing and explain how the principle works.
An electric heater plugged into a 115-V AC outlet uses an average electric power of 1200 W. What are the maximum instantaneous power and the minimum instantaneous power?
Question: A projectile is fired directly upward at such an initial velocity that it reaches half its height of 45 meters. Calculate its speed at the following intervals: Determine the speed of the p
According to the lorentz transformation equations, what are the x' and t' coordinates of this event as observed in the reference frame of a spaceship traveling in the x direction at a speed of .5c
If the distance between two objects is doubled, by how much should the mass of the first object increase, assuming the mass of the second is a constant, to maintain the same gravitational attraction
An astronaut on a distant planet notices that it takes 8 seconds for an object to drop 32 meters beginning from a resting position. Determine the magnitude of the acceleration due to gravity on the
The atom decays and ejects an electron of speed .48c relative to itself. What is the speed of the electron relative to the laboratory, if in the forward direction?
What is the percent difference, Δ, between the newtonian and the relativistic values for the momentum of a meteroid reaching the earth at a speed of 71 km/s?
What is the magnitude and direction of the impulse imparted by the floor to the ball?
A 54.0 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 375 g of water, initially at 21.2°C. What is the final temperature of the water, if no heat is transferred
A pendulum has a length of 0.3 meter and the acceleration of gravity is 9.8 m/s squared. Use the formula T = 2p vl/g to find the following values: the period of the pendulum
If the linear coefficient of expansion of the wood is 6.0 x10-5(C°)-1, at what temperature would the door begin to touch the side of the doorway?
The distance between two successive maxima of a transverse wave is 1.20m. Eight crests, or maxima, pass a given point along the direction of travel every 12.0s. Calculate the wave speed.
A car with a total mass of 1.92*10^3 kg has wheels of radius 31.0 cm and moment of inertia 0.830 kg · m2. What is the car's translational kinetic and rotational energy when the car is moving at
Find the energy stored in the inductor when the current reaches its maximum value. Find the energy stored in the inductor one time constant after the switch is closed.
A spring has a spring constant of k = 7.500N/m. If the spring is displaced 0.5500 from its equilibrium position, what is the force that the spring exerts?
An old professor uses a converging lens with focal length 28 cm to view a coin 16 cm in front of the lens. What is the magnification?