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The roller coaster in the figure below starts with a velocity of16m/s.One of the riders is a small girl of mass 27kg.Find her apparent weight when the roller coaster is at locationsBandC. At these two locations, the track is circular, with the radii of curvature given in the figure. The heights at points A, B, and C are hA=23m, hB=33m, and hC= 0. Assume friction is negligible and ignore the kinetic energy of the wheels.
In 1898, Pierre & Marie Curie isolated about 10mg of radium-226 from eight tons of uranium ore. How many radium nuclei would have decayed during this time
An inductor is connected to an AC power supply having a maximum output voltage of 10.00 Volt at a frequency of 390 Hertz. Find what inductance is needed to keep the rms current
A hydrogen atom is in its second excited state (n = 3). Using the Bohr theory of the atom, compute the following. The total energy, The potential energy, The kinetic energy, The radius of the orbit
a helicopter flies over the arctic ice pack at a constant altitude towing an airborne 140-kg laser sensor that measures
q1. a 2.75-mm-tall object is 8.0 cm to the left of a convex lens of 5.7 cm focal length. find the image position and
A molecule of DNA (deoxyribonucleic acid) is 2.24 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.34% upon becoming charged. Decide the effe..
Assume that you needed to make a pen for some small animals. You have 12 m of fencing. Determine what is the radius of the pen
Take element Z = 70 from the periodic table. Ionize it 69 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?
At the instant a traffic-light turns green a car starts with a constant acceleration of 8.34 ft/s^2. How far beyond the starting point will the car overtake the truck
A cart with mass 310 g moving on a frictionless linear air track at an initial speed of 1.0 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. What is the speed of the two-cart center of mass
A Geiger counter reading of a radioactive sample is initially 7120 counts per minute. What is the sample's half-life
A ball of mass 1.024 g and positive charge q =40.3microC is suspended on a string of negligible mass in a uniform electric field. We observe that the ball hangs at an angle of theta=15.0o from the vertical. What is the magnitude of the electric field..
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