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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?
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 27°C
two parallels wires, wire P and Q which carries a current of 30A and 50A, respectively in the same direction.The wires are placed 1.25 mm apart in a vacuum.
a) Calculate the magnetic force per unit length on wire P.
b) Determine the position x from wire P in between the wires where the magnetic field is zero.
. A charge of 20 x 10−6 C is 20 cm from another charge of 20 x 60−6 C
a. Find the force between them.
b. Determine the 𝐸𝑝 midway between them.
c. How much force will be experienced by an electron placed midway between them?
during a 10 minute period, a weigth lifter lifts a 30 kg dumbbell 50 times, from the floor level to a height of 1.75 meters. what is the average power ( in horse power) done by the weight lifter
The relative permittivity of a dielectric is 2.25
A) what is its permittivity?
B) what will be the capacitance if this inserted into a 7.8 uF air capacitor
A ball is thrown with an initial velocity of 36 m/s at 33°.
What is the initial velocity of the ball at x ang y-dimension?
What is the final velocity of the ball at x and y- dimension?
What is the time of the ball as it reaches its peak?
What is the maximum height reached of the ball?
What is the total time travel of the ball?
