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What is the magnetic field produced 10 cm away from a long straight wire that has 10 A of current moving through it?
Eight identical light bulbs are connected in parallel with a 120-V power source, by two long leads with resistance 1.4 Ohms. 210 mA flow through each bulb, What is the resistance of each bulb
If two polarized filters are blocking the same beam, one after another, how should you orient a third filter placed in between the two in order to allow the most light through?
A 51-kg penguin is perched atop a cliff, 58 m above the ocean. Find the penguin's gravitational potential energy with respect to sea level.
An object acted on by 3 forces moves with constant velocity. Evaluate the magnitude and direction of the third force acting on the object
a person traels by car from one city to another with different constant speeds between pairs of cities. she drives for
A uniform disk of mass 0.70 kg and radius 7.0 cm is mounted in the center of a 10 cm axle and spun at 800 rev/min. The axle is after that placed in a horizontal position with one end resting on a pivot. The other end is given an initial horizontal..
Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, hip's speed at impact is about 2. If this can be reduced to 1.30 or less, hip will usually not fracture. One way to do this is by wearing elasti..
Imagine a hydraulically operated dentist's chair having a mass of 200.0 kg, and in it is sitting a 54.8-kg patient. The large piston beneath the chair has a diameter of 5.00 cm, whereas the small piston, moved by a pedal on which the dentist steps..
The maximum potential difference across the terminals of a 60 Hz sinusoidal AC source is +20 V at t = 1/4 cycle. If at t = 0 the potential difference is zero, calculate the potential difference at t = 3.00 ms.
Use the worked example above to help you solve this problem. Figure a shows a simple apparatus for demonstrating resonance in a tube. Find the wavelength and the next two air-column lengths giving resonance
A commuter backs her car out of her garage with a constant acceleration of 1.60 m/s2. If she then brakes to a stop in 0.8 s, what is her (constant) deceleration
What multiple of the time constant τ gives the time taken for an originally uncharged capacitor in an RC series circuit to be charged to 14.0% of its final charge?
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