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A 41.0 kilogram ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. Evaluate the pressure exerted by the floor over the area of contact in the following cases?
(a) if the dancer is stationary
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(b) if the dancer is leaping upwards with an acceleration of 3.00 m/s2
a series RLC circuit has a resistance of 500 ohms, and inductance of 20.0 mH, and a capacitance of 2.00 uF. what is the peak current in this circuit
A 0.85-cm-diameter microscope objective has a focal length of 2.2 mm. It is used in visible light with a wavelength of 538 nm. What is the objective's resolving power if used in air
What is the magnitude of the electric field near the surface of a uniformly charged conducting plane,if the plane is a square of sides 14.0cm and carries a charge of 28.0nC? What is the force between the two planes if a plane with a charge of equa..
With what speed in miles/hr (1 m/s = 2.23 mi/hr) must an object be thrown to reach a height of 91.5 m (equivalent to one football field)? Assume negligible air resistance.
A spherical rain drop carries a charge of 2.70E-8 C and has a potential of 5.76E+4 V at the surface, Find the surface area of the drop
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance find the speed of the ball when it is at a height of 0.812 m above the ground. Answer in units of m/s.
A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 415 N walk on the overhanging part of the plank before it just ..
You're convinced the opera is almost over because of the large women singing a loud vibrato. What is the power coming from her voice
A pump, used to move water through a tube, uses a piston 15 cm in diameter which moves 2.0 cm/s. what is the fluid velocity when the tube is 3.0 mm in diamter
Two large, parallel, conducting plates are 9.7 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 5.7 x 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fring..
1 a solid disk r0.20 m m0.50 kg is suspended from the end of an l0.30m long rod m0.30kg crosssectional area of 2.0
Consider two parallel-plate capacitors, C1 and C2, that are connected in parallel. The capacitors are identical except that C2 has a dielectric inserted between its plates. What is the final voltage across the two capacitors
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