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A cube of balsa wood (side length = 0.25 m) is tied with a string to the bottom of a water- filled container. The wood is completely immersed. What is the tension in the string?
A 1.20 cm high object is placed 20.0 cm from a concave mirror with focal length 15.0cm. Using the mirror equation, Calculate the position of the image
An electric motor can accelerate a Ferris wheel of moment of inertia I = 19500 kg·m2 from rest to 9.4 rev/min in 12.0 s, Determine the torque generated by the motor to bring the wheel to 9.4 rev/min
A source has a half life of 30.2 years. It was created 19 years ago with an initial activity of 1 micro curie. Calculate the initial number of atoms in the sample
It costs 3.9 cents to charge a car battery at a voltage of 12 V and a current of 19 A for 120 minutes. What is the cost of electrical energy per kilowatt-hour
imagine a truck with a mass of 25 metric tons t 1 t1000 kg barrelling down a highway at a speed of 59 mih. what is the
two objects attract each other with a gravitational force of magnitude 1.01 x 10-8 n when separated by 19.9 cm. if the
Determine the angle theta¸ (in degrees) if the two positions of the first order spectral line are 38.0 cm and 62.0 cm. Assume the distance from the diffraction grating to the slit is 55 cm
Two polarizers are oriented at 73° to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted?
A particle goes from x = -2m, y = 3m, z = 1m to x = 3m, y = -1m, z = 4 m in 20 sec. Its displacement in i, j, k notation. Find what is its velocity
A net force of 20 N accelerates a 9-kg mass over a distance of 20 m. What is the increase in kinetic energy of the mass
What is the pressure change in water going from a 3.2- cm-diameter pipe to a 2.3- cm-diameter pipe if the velocity in the smaller pipe is 4.0 m/s
A person weighs 170lb. Assuming the density of the averagehuman body is about that of water, estimate her body's volume inboth cubic meter and liters
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