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An 8.0 kg object is moving in the positive direction of an x axis. When it passes through x = 0, a constant force directed along the axis begins to act on it. Figure gives its kinetic energy K versus position x as it moves from x = 0 to x = 5.0 m; K0 = 30.0J. The force continues to act. What is v when the object moves back through x = - 3.0m?
An astronaut travels to the nearest start system. 10 light years away, and returns at a speed of 0.5c. How much has the astronaut aged relative to those people remaining on Earth?
A cubic meter of copper has a mass of 8930kg. The block of copper is lowered into a lake by a strong cable until the block is copletely submerged
Draw a large circle. Now, place the major surface pressure and wind belts of the world at their appropriate latitudes - Explain how and why the average surface pressure features shift from summer to winter?
When you take a bath, how many kilograms of hot water (51°C) should you mix with cold water (12°C) so that the temperature of the bath is 36°C? The total mass of water (hot plus cold) is 189 kg. Ignore any heat flow among the water and its external s..
After 2.12 days, the activity of a sample of an unknown type radioactive material has decreased to 84.6% of the initial activity. What is the half-life of this material
An electric eel develops a potential difference of 490V , driving a current of 0.85A for a 1.0 ms pulse. Find the total energy of this pulse
the magnitude of the force that a spring exerts f when it is stretched a distance x from its unstressed length is
A 0.61-mm-diameter copper wire carries a tiny current of 2.6A. The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m3. NA=6.02×1023. Estimate the electron drift velocity. Suppose one free electron per atom. Express your answer to two i..
An L-R-C series circuit has C=4.80*10^-6F, L= 0.500H, and source voltage amplitude V= 54.5V. The source is operated at the resonance frequency of the circuit. If the voltage across the capacitor has amplitude 77.5V, what is the value of R for the res..
question an unstable particle with a mass equal to 3.34 multiplied by 10-27 kg is initially at rest. the particle
A 481-kg cannon fires a 18.3-kg projectile with a speed of 167 m/s with respect to the muzzle. what is the speed of the projectile with respect to the ground
A pion is created in a particle collision with a large speed such that, gamma = 100. How long does the pion live in its rest frame
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