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You drive north on a highway, then, without changingspeed, you round a curve and drive east. What is the changer of your velocity and your acceleration?
A certain atom has atomic number Z = 20 and atomic mass number A = 42. What is the approximate radius of the nucleus of this atom
A sanding disk with rotational inertia 8.1 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnitude 20N·m about central axis of the disk. About that axis and with torque applied for 29 ms, what is the magnitude of (..
If the rms speed of the molecules of a quantity of helium at temperature 142 K is the same as the rms speed of neon atoms at a second temperature
A car of mass m moving at speed v1 collides and couples with the back of a truck of mass 2 m moving initially in the similar direction as the car at a lower speed v2.
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge and aninstrument that measures the magnitude and direction of the forceexerted on the object by the electric field.
0.17 mol of argon gas is admitted to an evacuated 54.83 cm3 container at 27°C. What is the final volume of the gas
Two 4.4 kg bodies, A and B, collide. The velocities before the collision are A = (12 + 46) m/s and B = (-32 + 22) m/s. After the collision, 'A = (-16 + 30) m/s. What is the change in the total kinetic energy
A mass hung on a string that is wrapped around an axle on a wheel produces a tension in the string of 5.65 N. The axle has a radius of 0.045 m. What is the torque produced by the tension on the axle
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision. how far did they skid
what is the primary microscopic origin of the magnetic field of a magnetized piece of iron, Each atomic nucleus produces a magnetic field.
A radar has a resolving power of 30 m at a range of 1.0km. What is the minimum width of its antenna if its operating frequencyis 9500 MHz
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