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A small electric car overcomes a 250 N friction force when traveling 30 km/h. The electric motor is powered by ten 9 V batteries connected in series and is coupled directly to the wheels whose diameters are 50 cm. The 300 armature coils are rectangular, 10 cm by 15 cm, and rotate in a 0.66 T magnetic field.
(a) How much current does the motor draw to produce the required torque?
A
(b) What is the back emf?
____V
(c) How much power is dissipated in the coils?
____W
(d) What percent of the input power is used to drive the car?
_____%
A 61-kg and a 97-kg skydiver jump from an airplane at an altitude of 6100 m, both falling headfirst. Calculate their terminal velocities
a 1000 N crate is being pushed across a level floor at a constant speed Vi=1.75 m/sec by a force of F=300N at an angle of theta=20 Degrees below horizontal. what is the final velocity of the crate
Projects A and B are mutually exclusive. Project A costs $10,000 and is expected to generate cash inflows of $4,000 for 4 years. Project B costs $10,000 and is expected to generate a single cash flow in year 4 of $20,000.
A glider of mass 0.155kg is moving to the right on a frictionless, horizontal air track with a speed of 0.760m/s. Find the magnitude of the final velocity of the 0.155kg glider
The Research Paper will be a comprehensive research review of the significant principles of management communications used to successfully achieve organizational objectives
US firm X wants yens. It can borrow yens at 5% and can borrow dollars at 10%. Japanese firm Y wants dollars. It can borrow dollars at 12% and can borrow yens at 6%. You are the swap bank.
The numerical value of the faraday constant is given as 96500 this value represents the number of carried by
Compare zero-, one, two-, and three- address machines by writing programs to compute.
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles.
CO 5) What should be the coefficient of hydrogen, H2, in the following equation in order to make it balanced? 2 Al + 3 H2SO4 ---> Al2(SO4)3 + ? H2
A proton is captured by an oxygen-16 atom which in turns emits a deuteron. find the mass number of the product isotope
An airplane is flying in a horizontal circle at a speed of 520 km/h. If the wings of the plane are tilted 34° to the horizontal, what is the radius of the circle (in m) in which the plane is flying
The driver of one car sounds a 365 Hz frequency horn and the driver of the other car hears a frequency of 392 Hz, Determine the speed of both cars
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him, What is the force of friction between the losing player's feet and the grass
A vertical straight wire carrying an upward 21-A current exerts an attractive force per unit length of 8.3×10?4N/m, What is the magnitude of the current in the second wire
The hot reservoir of a heat engine is steam at 100?C while the cold reservoir is ice at 0?C. In 1.2hrof operation, 11kg of steam condenses, What is the power output of the heat engine
Iterates until convergence is reached (the previous guess for the velocities is not significantly different from the current guess and calculates the friction factor for the current guess of velocities.
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. Find the volume of the cylinder. Calculate the probable percent error in the length. Calculate the probable percent error..
An ordinary workshop grindstone has a radius of 7.50 cm and rotates at 6000 rpm. What is the linear speed of a point on its edge
what will be the induced emf magnitude in the short coil. A 77.9 kg fireman slides down a 4.13 m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground.
What is distance of a sample of blood from the rotation axis
A combination mercury- steam turbine takes saturated mercury vapor a boiler at 500 C and exhausts to steam boiler at 240 C. what is the ideal efficancy of this combination
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