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Two point charges with Q_{1} = 8mu * C and Q_{2} = - 4mu * C are arranged as shown in the figure. If L = 0.03m , what is the electric field at the origin?
An escalator is used to move 15 passengers every minute from the first floor of a department store to the second. The second floor is located 6 meters above the first floor. The average passenger's mass is 52 kg. Determine the power requirement of the escalator in order to move this number of passengers in this amount of time.
What is the Kinetic Energy of a 1300 kg object that is moving with a speed of 30 m/s? *
A tennis ball is traveling at 40 m/s and has a kinetic energy of 80 J. Calculate the mass of the tennis ball. *
Michael (mass of approximately 60 kg) does push-ups by applying a force to elevate its center-of-mass by 20 cm in order to do 850 Joule of work. If the man does all this work in 5 seconds, then determine its power.
An escalator is used to move 15 passengers every minute from the first floor of a department store to the second. The second floor is located 6 meters above the first floor. The average passenger's mass is 52 kg. Determine the power requirement of the escalator in order to move this number of passengers in this amount of time. *
- A nitrogen molecule can be thought of as two point masses (m of each = 14u, where u = 1.67 x 10-27 kg) separated by a distance of 1.3 x 10-10 m. In air at room temperature the average rotational kinetic energy of such a molecule is about 4.0 x 10-21 J. Find the moment of inertia of such a molecule about its center of mass, and its speed of rotation in revolutions per second.
A gas turbine plant receives air at 1 bar and 290°K and compresses it to 5 bar. If the temperature of air after compression is 1000°K; find the thermal efficiency of the turbine
What is the capacitance of a parallel plate capacitor with metal plates, each of area of 6.00 m2, separated by 10.00 mm?
A 10kg coconut is positioned on top of the roof of a house that has a height of 5.00m and is
located on the edge of a cliff that is 20m high. Determine the gravitational potential energy of
the coconut relative to the following position: a.) on the top of the roof of the house, b. the
floor of the house c. the bottom of the cliff.3. How much potential energy does a car gain if a
crane lifts the car with a mass of 1500kg 20m straight up?
