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Q. A 1.39 V potential difference is maintained across a 1.2 m length of tungsten wire that has a cross-section area of .81mm square and the resistivity of tungsten is 5.6 times ten to the negative 8 ohms. what is the current in the wire?
Q. An airplane needs to reach a velocity of 226 km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight?
A baseball leaves a pitcher's hand horizontally at a speed of 156km/h. The distance to the batter is 18.3 m. (overlook the effect of air resistance.) (a) How long does ball take to travel the first half of that distance? (b) The second half? (c) H..
A 5 kg toy race car can move along an x axis. It gives Fx of the force acting on the car, that begins at rest at time t = 0. (The vertical axis is marked in increments of 2.5 N.) what is the momentum at t=6?
The block is acted upon by its weight w=200lb, a horizontal force Q=600 lb and pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the incline there by sliding the block up it. Establish P and R.
At one instant a bicyclist is 53m due east of a park's flagpole, going due south with a speed of 12m/s. Then 37s later, the cyclist is 53m due north of the flagpole, going due east with a speed of 12m/s. For the cyclist in this 37s interval.
Show that the horizontal resultant of these two forces on the lamp is zero. Work out the weight of the lamp.
Six mass pieces of 100g each are placed on a mass holder of 140g which is hung from a string. Analyse the tension in the string.
The forklift and operator have a combined weight of 10000 lb and a center of gravity at G. Find the maximum vertical acceleration given to a pipe, and the normal reactions acting on the wheels.
A basketball of mass 610g and circumference 76cm is rolling without slipping on a gym floor. Treating ball as a hollow sphere, what fraction of its total kinetic energy is associated with its rotational motion.
How numerous years would it take a thermally insulated one-million-kilogram chuck of granite to undergo a 1000k boost in temperature?
A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place .
What is the angular momentum of a 3.2 kg uniform cylindrical grinding wheel of radius 12cm while rotating at 1400 rpm.
What is the force acting on the board because of the left support when a diver of mass 63.20 kg stands at the end of the board over the water? Suppose that these forces are vertical.
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