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A closed box is filled with dry ice at a temperature of ?78.4 °C, while the outside temperature is 22.8 °C. The box is cubical, measuring 0.283 m on a side, and the thickness of the walls is 2.10 multiply.gif 10-2 m. In one day, 3.14 multiply.gif 106 J of heat is conducted through the six walls. Find the thermal conductivity of the material from which the box is made.
An airplane starting from airport A flies 280 km east, then 365 km at 29.0° west of north, and then 130 km north to arrive finally at airport B.
A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.
A small metal ball with a charge of 0.45 C and a mass of 34 g (0.034 kg) enters a region where there is a magnetic field of 0.55 T. From Newton's second Law, what is the magnitude of the acceleration of the charged ball
submarine on the ocean surface receives a sonar echo indicating an underwater object. The echo comes back at an angle of 20 degree above the horizontal and the echo took 3.04s to get back to the submarine What is the object's depth?
An amateur radio operator wishes to build a receiver that can tune a range from 13.8 MHz to 15.1MHz, What is the required value of the constant inductance
a charged particle is injected at 211 m/s into a 0.0627- T uniform magnetic magnetic field perpendicularly to the field, What is the charge to mass ratio of this particle
Two point charges lie on the x axis. A charge of +9.5 µC is at the origin, and a charge of -9.5 µC is at x = 10.0 cm, What is the net electric field at x = -4.0 cm
Status Newton's First Law of motion.
A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +16.6 m/s in a time of 34.3 s, What is the tension in the hitch that connects the trailer to the car
A particle is projected from the surface of Earth with a speed equal to 3.4 times the escape speed. When it is very far from Earth
Analyze Trial Balance and indicate possible adjusting entries that might be necessary before an accurate set of financial statements could be prepared.
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 2.20 × 10-11 m. Determine the kinetic energy of the electron.
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