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A ball rolls off a table and falls 0.70 m to the floor, landing with a speed of 4.3 m/s.
a) What is the magnitude of the acceleration of the ball just before it strikes the ground?
b.) What was the initial speed of the ball?
c.) What initial speed must the ball have if it is to land with a speed of 5.3 m/s ?
A current with sinusoidal time-dependence, whose peak value is 5.55 A and frequency is 775 cycles per second, Calculate the average power dissipated by the loop, if its resistance is 64.3
A football is kicked off at a speed of 24 m/s at 30 degree about the horizontal and lands on the field. What is the horizontal distance from the starting point
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
A uniform stick 1.4 m long with a total mass of 300 g is pivoted at its center. With what angular speed is the stick spinning after the collision?
A rocket of total mass 3180-kg is travelling in outer space with a velocity of 115 m/s toward the Sun.
Show that the SI units for Planck's constant (h) are equal to the SI units of angular momentum. Calculate the magnitude of the Bohr radius
A 190 g block hangs from a spring with spring constant 15 N/m. At t=0s, the block is 13 cm below the equilibrium point and moving upward with a speed of 98.0 cm/s.
An airplane is flying in a jet stream that is blowing at 45.0 m/s in a direction 15 degrees south of east. What is the airplane's speed relative to the air mass
A glass bead has a total charge of +10 nC. A proton is located at a distance of 3 cm from the center of the glass bead. What is the direction of the force on the proton
On an essentially frictionless, horizontal ice rink, a skater moving at 6.0m/s encounters a rough patch, Use the work-energy theorem to find the length of this rough patch.
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length? (b) How tall is the pencil's image if the pencil is move..
assume that the microwave radiation has a wavelength of 11.2 cm. How many photons are required to heat 235 mL of coffee from 25.0 ^circ rm C to 62.0 ^circ rm C.
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