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An air conditioner connected to a 120 V rms ac line is equivalent to a 14.9 ? resistance and a 1.39 ? inductive reactance in series. calculate the impedance of the air conditioner
a girl of mass 40 kg is in a rocket ship an altidude of 35 km above the surface of the earth. Find the gravitational force on the girl by the earth
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
A 0.0250 kg bullet moving horizontally at 400 m/s embeds itself into an initially stationary 0.500 kg block. What is their velocity just after the collision
A thin block of soft wood with a mass of 0.074 kg rests on a horizontal frictionless surface. Calculate the initial and final kinetic energies of the system
At its narrowest point the femur bone in the human leg resembles a hollow cylinder that has an outer radius of roughly 1.1 cm, how much force will be required to rupture it
A 13.0 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. Calculate the time constant of the circuit
In an RC series circuit, ? = 12.0 V, R = 2.02 M?, and C = 2.33 µF. Find the maximum charge that will appear on the capacitor during charging
The second-order dark fringe in a single-slit diffraction pattern is 1.40 mm from the center of the central maximum. calculate the wavelength of the incident light
Light of wavelength 650 nm falls on a 0.31 mm wide slit and forms a diffraction pattern on a screen 1.5 m away. Find the width of the central maximum
When a person is given intravenous fluid, the bag containing the fluid is typically held about 0.8 m above the person's body. what is the pressure in the person's blood
A basketball of mass 3 kg and radius 0.20 m rolls without slipping down an incline of angle 30 degrees. Calculate the acceleration of the center of mass
A 2.3 µF capacitor and a 5.3 µF capacitor are connected in parallel across a 320 V potential difference. Calculate the total energy in joules stored in the capacitors
A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. what is her speed at the bottom
a thin, uniform bar of length D = 1.28 m and mass M = 0.67 kg pivoted at the top. find the speed of the particle before impact
A concave mirror produces a virtual image that is three times as tall as the object. what is the radius of curvature of this mirror
A very hard rubber ball (m = 0.7 kg) is falling vertically at 9 m/s just before it bounces on the floor. find the average force exerted by the floor on the ball
A block of mass m = 6.68 kg is attached to a spring which is resting on a horizontal frictionless table. What is the maximum speed of the block
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 240 kg · m2, What is the new angular speed of the merry-go-round
A 665 kg elevator starts from rest. It moves upward for 3.22 s with constant acceleration until it reaches its cruising speed, 1.84 m/s
A 3.0 m long rigid beam with a mass of 105 kg is supported at each end. How much upward force does each support exert on the beam
Two objects (m1 = 4.95 kg and m2 = 2.60 kg) are connected by a light string passing over a light, frictionless pulley suspended over a table. Determine the speed of each object when the two pass each
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.33 T. Determine the area of the first surface
Two objects with masses represented by m1 and m2 are moving such that their combined total momentum has a magnitude of 16.3 kg · m/s, Determine the mass of each object
A small electric car overcomes a 250 N friction force when traveling 30 km/h. How much power is dissipated in the coils