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A chair of weight 140 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F= 44.0 N directed at an angle of 39.0 degrees below the horizontal and the chair slides along the floor.
Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair.
An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is = 1.42 × 109 W/m2. find the magnetic field in the electromagnetic wave emitted by the lase
Given an RLC circuit where its resistance, capacitance and inductive reactance are all the same, 10 ohms. Is this circuit inductive, capacitive or in resonance? Secondly, if the frequency is doubled, what is the new impedance?
suppose the length L of the uniform bar is 3.00 m and its weight is 230 N. Also, let the block's weight W = 350 N and angle ? = 30°. find the maximum possible distance x before the wire breaks
A runner moving at a constant speed of 11.5 m/s rounds a curve of radius 6.15 m. Compute the acceleration of the runner
The mass of the Space Shuttle orbiter is 8.8 x 104 kgand the period of its orbit is 82 minutes. Estimate thekinetic energy of the orbiter and the work done on it by gravitybetween the launch and orbit. (
A 18 g rifle bullet traveling 230 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, evaluate the horizontal component of the pendulum's displacement
Driving in your car with a constant speed of 12 {rm m}/{rm s}, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 {rm m}, find out the apparent weight of a 69 person in your car as you ..
A ball is dropped from a high building. Using the approximate value of g = 10 m/s2, find the change in velocity between the fourth and fifth second of its flight
In the hydraulic system shown in the figure , the piston on the left has a diameter of 4.5 and a mass of 1.8, what is the height difference between the two pistons
A tennis ball is shot vertically upward in an evacuated chamber with an initial speed of 20.0 m/s at time t=0. How high does the ball rise
The electron gun of a television tube accelerates an electronfrom rest through a potential difference of 350V. evaluate the change in the potential energy of the electron
Two children, Shuya and Noriko, are riding on a carousel. Shuya is at the outer edge and Noriko is at a point half way to the center. what is Noriko's angular speed
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