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Perhaps to confuse a predator, some tropical beetles are colored by optical interference that is due to scales whose alignment forms a diffraction grating (which scatters light instead of transmitting it). When the incident light rays are perpendicular to the grating, the angle between the first-order maxima (on opposite sides of the zeroth-order maximum) is 26 degrees in light with a wavelength of 550 nm. What is the grating spacing of the beetle?
A 13.0-kg object undergoes an acceleration of 1.5 m/s^2. What is the magnitude of the resultant force acting on it
An ideal gas of p=1000 hPa, V=1 m3, T=20 C undergoes the following successive changes: (1) it is warmed under constant pressure until its volume double, (2) it is warmed under constant volume until its pressure doubles, and (3) it expands isothermall..
A 60 kg skier skis a distance of d=200 m down a q=15o incline starting from rest. His speed at the bottom of the hill is 5 m/s. What was the NET work done on the skier
a student is reading material written on a blackboard. her contact lenses have a refractive power of 57.50 diopters; the lens to retina distance is 1.750cm. how far in meters is the blackboard from her eyes
A circular coil with 79 turns of wire and a diameter of 18 cm is placed in a magnetic field given by B(t) = 5 t2 + 2 t + 3 T where t is time in seconds. The field is perpendicular to the plane of the coil. What is the induced EMF at t = 7 s?
A block is on a horizontal surface (a shake table) that is moving back and forth horizontally with simple harmonic motion of frequency 2.63 Hz. The coefficient of static friction between block and suface is 0.551. How great can the amplitude of the S..
a calculate the shear modulus g of 1040 carbon steel.b using the shear modulus value calculated in part a calculate the
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. How much of the rope unwinds in this time interval
you are driving down the highway late one night at20when a deer steps onto the road35in front of you. your reaction
A 8.80-g bullet has a speed of 1.17 km/s. What is the bullet's kinetic energy if its speed is halved
A wire is shaped into a rectangle of dimensions A × B. The wire loop carries a current of I amps. Calculate the magnetic field at the geometric center of the loop.
Hospital patient. A 65.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the ..
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