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In the javelin throw at a track-and-field event, the javelin is launched at a speed of 30.0 m/s at an angle of 39.2 ° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is required for the angle to be reduced from 39.2 ° at launch to 11.7 °?
A 50 kg person on a merry-go-round is traveling in a circle with a radius of 2 m at a speed of 6 m/s. How does it compare with the person's weight
In a Young's double slit experiment, if the separation between the two slits is 0.050mm, find the spacing between the first order and second order bright fringes for light with wavelength of 600nm
Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
A uniform ion beam of radius R consists if N' ions per meter ofmass m, speed v, and charge q. Find the Lorentz force (due toboth E and B) on an ion at the edge of the beam. At what speed would the force become zero?
An energetic father stands at the summit of a conical hill as he spins his 22 child around on a 5.3 cart with a 2.2m-long rope. The sides of the hill are inclined at 25 degrees. He keeps the rope parallel to the ground, and friction is negligible.
when the tips of the rotating propeller of an airplane have a linear speed greater than the speed of sound the
Starting from one oasis, a camel walks 25 km in a direction 30 degrees south of west and then walks 30 km toward the north to a second oasis
Suppose a simple pendulum consists of a small weight (called apendulum bob) suspended from a 0.52-m-long string. If the pendulum bob were displaced to one side by a small angle and thenreleased,
A 0.51T magnetic field is perpendicular to a circular loop of wire with 50 turns and a radius of 13cm, what is the magnitude of the induced emf
We pass a laser beam through a double slit. On a screen 18.52 m away, we observe a series of bright lines which are 3.4 mm apart. What is the distance between the two slits
part 1 what do you think of socrates conclusion that no person knowingly does evil and therefore all evil is ignorance?
A 640- hollow ball 19 in diameter is suspended by a wire and is undergoing torsional oscillations at a frequency of 0.78 What is the torsional constant of the wire
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