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A 120 V rms voltage at 60 Hz is applied across a capacitor and a 100 ohm resistor. if the impedance of this circuit is 200 ohm, what is the average power of this circuit?
a)36Wb)278 Wc)72 Wd)100 We) 200 W
A cat is trying to jump onto a countertop that is 1m tall from 0.3m away. The cat's initial jump speed (magnitude of the total initial velocity) is 10m/s
A small block of mass m = 140 g is released from rest at point along the horizontal diameter on the inside of a frictionless, hemispherical bowl of radius R = 28.0 cm as shown in the figure below. the height = 2R/3 = c (d) Calculate its kinetic energ..
An object 3.4 mm tall is placed 25cm from the vertex of of a convex spherical mirror. how far is the image from the vertex of the mirror
Two lenses that are L = 42 cm apart are used to form an image, as shown in figure. Find the distance from lens and magnification of the image.
a child is swinging on a swing set. if the chains holding the swing are 5m long, how fast will the child be moving at the lowest point in the swing
A Cessna aircraft has a lift-off speed of 120 km/h. How long does it take the aircraft to become airborne
A yo-yo is made from two uniform disks, each with mass M/2 and radius R, associated by a light axle of radius r(R>r). Since the axle is nearly mass less, the total mass of the yo-yo is M. A light, thin string is wound several times around the axle.
A barber's chair with a person in it weighs 2100N. The output plunger of a hydraulic system begins to lift the chair when the barber's foot applies a force of 55N to the input piston. Neglect any height difference between the plunger and the piston. ..
three types of charged particles lets call them a b and c are accelerated and then pass through a velocity selector so
Table contains the cosine frequency components of a Gaussian peak which has a full width at half-height of 1 sec. The unit height equation for such a Gaussian peak is exp[-4(ln 2)t^2] where t is time in sec. For each frequency component f with rel..
How fast should a moving clock travel if it is to be observed by astationary observer as running at one-half its normal rate?
A solenoid of length 5.0 cm and diameter 0.87 cm is wound with 162 turns per cm. The current is decreasing at a rate of 38.0 A/s. What is the induced emf in the entire solenoid
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