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A lamp (R = 152 ), anelectric heater (R = 23 ), and a fan(R = 48 ) areconnected in parallel across a 116 V line.
a) What total current is supplied to the circuit?b) What is the voltage across the fan?c) What is the current in the lamp?d) What power is expended in the heater?
A hammer strikes one end of a thick iron rail of length 8.5m. A microphone located at the opposite end of the rail detects two pulses of sound, one that travels through the air and a longitudinal wave that travels through the rail.
An object 2.0 cm high is placed 45 cm from a concave mirror of radius 10 cm and radius of curvature 60 cm. Find the location, size, and orientation of the image
Calculate the change in potential energy of a 92.8 kg man when he takes an elevator from the first floor to 29th floor, if the distance between floors is 4.41 m.
A 70.0 kg box is pulled by a 500N force at an angle of 30degrees to the horizontal. The friction is 30.0 N. Write the Newton's 2nd Law equations for the sum of the forces inboth the X and Y direction. What is the acceleration of the box?
Consider a person on the moon who launches herself into a standing broad jump at 45 degrees. The average force generated during launching is, compute the maximum height of the jump
A point source of light illuminates an aperture 4.00 away. A 17.0 -wide bright patch of light appears on a screen 2.00 behind the aperture, How wide is the aperture
A 12.25 mH coil carries a constant current of 0.35 A, clockwise. what potential difference will appear across the coil during this time
A father pushes his child on a swing so that the child's speed is 9.00 m/s at the lowest point of his path. What force does the child exert on the seat if his mass is 18.0 kg
A roller coaster at an amusement park starts outon a level track50.0m long then goes up a 25.0-m incline at an angle of300 to the horizontal. what is its displacement from its starting point
The nucleus of a hydrogen atom is a single proton. The radius of a proton is approximately 1 fm (1 multiplied by 10âˆ'15 m). What is the approximate volume of a proton
A ball is thrown upward from the top of a building at an angle of 60.0° to the horizontal, What is the horizontal distance (in m) covered by ball before hitting the ground
For someone who chooses y=0 to be 5 meteres above the ground and up as positive, what will he get for the potential energy
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