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Draw the Lewis structure for formaldehyde, H2CO, a compound whose odor is known to most biology students because of its use as a preservative. Show a structure with dots only, and then show one with both dots and dashes.
Perhaps to confuse a predator, some tropical beetles are colored byoptical interference that is due to scales whose alignment forms adiffraction grating, What is the grating spacing of the beetle
A 1200-turn coil of wire that is 2.1 cm in diameter is in a magnetic field that drops from 0.14 T to 0 T in 12 ms. What is the emf of the coil
a monochromatic beam of x-rays with a wavelength of 0.280 nm is scattered by a metal foil. what is the observed scattering angle
(a) Determine the net force on the car (answer is not 2762.75) N. (b) Determine the net force on the trailer.magnitude (c) Determine the force exerted by the trailer on the car. magnitude
A force of 7 pounds is required to hold a spring stretched 0.5 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.9 feet beyond its natural length.
A baseball is thrown straight up. Obtain the acceleration at the top of its path
The analysis of the dry exhaust gas from a boiler shows 10 % Carbon Dioxide. Assuming the rest is Oxygen and Nitrogen; determine the excess air supplied to the process and the % excess air. The fuel contains 85%C and 15 % H2.
Consider a conical pendulum with a 84.0 kilogram bob on a 10.0 meter wire making an angle of θ = 3.00 degree with the vertical. Determine what is the radial acceleration of the bob
A rectangular loop of wire with sides 0.23 and 0.39 m lies in a plane perpendicular to a constant magnetic field, compute magnitude of the average emf induced in the loop.
A magnetic field of magnitude 0.610 T is directed along the positive x-axis and passes through a wedge-shaped object, as indicated in the figure below. (Take W = 1.8 m.) Find the outward directed magnetic flux through the bottom.
A pendulum consists of a uniform disk with radius 10 cm and mass 350 g attached to a uniform rod with length 500 mm and mass 295 g. Calculate the rotational inertia of the pendulum about the pivot. What is the distance between the pivot and the cen..
Three astronauts, propelled by jet backpacks, push and guide a 114 kg asteroid toward a processing dock, exerting the forces, with F1 = 32 N, F2 = 52 N, F3 = 39 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured relative ..
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