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Consider two adjacent fields. One is an irrigated cropped field, the other is a fallow field. Which of the fields will have the highest Bowen ratio
How many cm/s2 of acceleration should correspond to 1 unit of ramp slope if: •a graph of number of paper clips needed to maintain equilibrium vs. what would be the acceleration of the cart
The solar energy coming to the earth by radiation is 1,340 W/m If the sun has a radius of 7.000*10^8m, what is the temperature of the sun
A hollow metal sphere carries a charge of 5.0 μC. A second hollow sphere with a radius that is 4 times the size of the first carries a charge of 15.0 μC. How much charge
A long straight wire carries a current of 6.2 A. The wire is horizontal in the plane of the page (screen), Calculate the force that acts on the electron
A converging lens has a focal length on both sides of 24.0 cm. An object is placed to the left of the lens at 14.0 cm. The object is 8.0 cm in height. Is the image to the left or right of the lens
The efficiency of a certain machine is 0.50. If the cold temperature is 527 degrees celsius, what is the HOT temperatur
An outside loudspeaker (considered a small source) emits sound waves with a power output of 120 W. Find the intensity level in decibels at that distance
oscillating voltage applied to an LRC circuit, V=110cos(120Ï€t), R = 1kΩ, L = 10mH, C = 4700 µF. find the phasor angle
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.70 mm. evaluate the electric field between the plates
A 0.50 kg block rests on the icy surface of a frozen pond, which you can assume to be frictionless. what is the minimum uncertainty in the block's speed
A mass m slides in the bottom of a hemispherical bowl of radius R under the influence of gravity. Find the constraint force
A piece of glass has a thin film of gasoline floating on it. A beam of light is shining perpendicular on the film. what is the minimum nonzero thickness of the film
A solid disk (mass = 5 kg, R=0.6 m) is rolling across a table with a translational speed of 9 m/s. What is the total kinetic energy of the disk
The intensity I of light from an isotropic point source is determined as a function of distance r from the source. What is the power of the source
Suppose that the spin magnetic quantum number ms had three possible values, rather than two. how many electrons would it take to fill the K shell
A vertical spring (spring constant =165 N/m) is mounted on the floor. A 0.390-kg block is placed on top of the spring, Obtain the frequency (in Hz) of the motion
A microphone is attached to a spring that is suspended from the ceiling, as the drawing indicates. determine the amplitude of the simple harmonic motion
Consider four 8 · µC charges placed at the corners of a square, which is 2.1 ·m on a side. The charges on the top are both positive, Find the electric field at the center of the s
A particular Bohr orbit in a hydrogen atom has a total energy of -0.85eV. What is the kinetic energy of the electron in this orbit
An object of height 4.7 cm is placed 47 cm from a convex mirror of focal length having magnitude 39 cm. describe the properties of the image
Calculate the rotational inertia of a meter stick, with mass 0.576 kg, about an axis perpendicular to the stick and located at the 29.9 cm mark
A target glider, whose mass m2 is 320 g, is at rest on an air track, a distance d = 53 cm from the end of the track. A projectile glider, How much more time elapses before the gliders collide again
A freezer is used to freeze 2.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0 C, Determine the change in the entropy of the freezer
A particular engine has a power output of 4.00 kW and an efficiency of 25.0%. Assume the engine expels 7000 J of energy in each cycle. Find the time required to complete each cycle