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Two ping-pong balls each have a mass of 2.7 g and carry a net charge of 0.430 µC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is to remain at rest there?
a cross-flow heat exchanger consists of a bundle of 32 tubes in a 0.6-m2 duct. hot water at 150degc and a mean velocity
what is minimum sample size required to estimate a mean within 2 with 95 confidence if the sample standard deviation is
what is the molarity of a hydrocholric acid solution if 20.00 ml of hcl is required to neutrilize .424 of sodium
the half width of a 99 confidence interval for a mean based on sample size of 30 is 10. what is the value of the sample
nitric acid is a strong acid ammonium hydroxide is a weak base and ammonium nitrate is a soluable salt what is the net
the half width of a 95 confidence interval for a population mean based on a sample size of 30 is 5.9. what is the value
a confidence interval for a population mean is 20.4 30.8. what is the value of the sample
a flat circular analog clock face has negative points charges -q -2q -3q -4q..... -12q fixed at the position of
the mean monthly rent for a sample of studio apartments in one city is 1260 with a standard deviation of 230. the
q1. two large flat sheets of insulating material are parallel to each other one has a uniform surface charge density of
A Ferris wheel with radius 14.0m is turning about a horizontal axis through its center. What is the magnitude of the passenger's acceleration as she passes through the lowest point in her circular motion
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 . Ignore air resistance. A flea jumps straight up to a maximum height of 0.520 . What is its initial velocity as it leaves ..
An Electromagnetic Car Alarm, Your latest invention is a car alarm that produces sound at a particularly annoying frequency of 3500Hz. What value of inductance should you choose for your car alarm circuit
An ambulance traveling at 46 m/s approaches a car heading in the same direction at a speed of 31 m/s. At what frequency does the driver of the car hear the siren
A charge of -3.00 µC is fixed at the center of a compass. Twoadditional charges are fixed on the circle of the compass (radius =0.100 m). The charges on the circleare -3.90 µC at the position duenorth and +5.00 µC at the position due east.
A 0.200-kilogram piece of aluminum at 100 °C is immersed in 0.85 kg of water at 15 °C. what is the temperature of the metal and water
Determine the magnitude and direction of impulse delivered to the ball by the floor.
A 40 cm telescope has a focal ratio of f/10. a) What is the light-gathering power of this telescope relative to that of a single human eye?
question what fraction of the power radiated by the sun is intercepted by the planet mercury? the radius of mercury is
A 10 g ball of clay traveling east at 1.5m/s collides and sticks together with a 30g ball of clay traveling north at 2.5m/s. What is the speed of the resulting ball of clay
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 413 N and F2 = 357 N. What is the resultant of these two forces
In a series R-L-C circuit, R = 460 ohm , L = 0.390 H and C = 1.20×10?2 mF. What is the resonance angular frequency of the circuit
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