What power is delivered by the wall
A transformer with 120 turns in it's secondary supplies 12 volts at 220 ma to a toy train. The primary is connected across a 120 v wall outlet. How many turns are in the primary? What's the primary current? What power is delivered by the wall?
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After impact the block rises 5.10 m above the table. what was the speed of the bullet before striking the block?
Saturated ammonia vapor leaves an evaporator at 10 F and 0.5 lbm/s. The velocity must be less than 15 ft/s. What is the minimum pipe diameter?
When a 50 mF capacitor is attached to an AC source, its capacitive reactance is 40 Ohms. If instead a 100 mF capacitor is attached to the same source what will be its capacitive reactance?
For a particular card game a standard deck of cards has all of the aces, kings, queens, and jacks removed. Among the 36 cards remaining two cards are chosen simultaneously at random. What is the probability that the sum of the two cards is greater
A club with 20 members must choose a three-person executive committee and a five-person social committee.
An automobile traveling at 90 km/hr rounds a long sweeping curve of radius 250m. The air conditioner is on and the windows are rolled up so that the air within the car moves essentially as a rigid body.
Since these eyeglasses do not completely correct her vision, she must hold a newpaper 42.00 cm from her eyes in order to read it. She wears the eyeglasses 2.00 cm from her eyes. How far is her near point from her eyes?
In a bivariate regression, which variable is the dependent variable and which one is the independent variable? What does the intercept of a regression tell? What does the slope of a regression tell?
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