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A ball thrown horizontally at 29 m/s travels a horizontal distance of 54 m before hitting the ground. From what height was the ball thrown?
If = 533 , what is the minimum diameter of the circular opening from which the laser beam emerges? The earth-moon distance is 3.84×105.
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 92 m above the glacier at a speed of 165 m/s. How far short of the target should it dr
The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 28 m/s at an angle of 31° above the horizontal. (a) How long was the ball in flight?
A 41-kg box is thrown at a speed of 220 m/s and is brought to a halt in a collision that lasts for a time of 6.5 ms. What is the magnitude of the average net force that acts on the box during the co
A small map shows New York to be 486 miles in a direction 8° north of east from Columbus. The same map shows that Buffalo is 302 miles in a direction 56° west of north from New York. Assume
Two strings are vibrating at the same frequency of 150 Hz. After the tension in one of the strings is decreased, an observer hears four beats each second when the strings vibrate together. Find the
A ball launched from ground level lands 2.75 s later on a level field 32 m away from the launch point. Find the magnitude of the initial velocity vector and the angle it is above the horizontal. (Ig
What is the final velocity of the dipole? Note: there will be a final x-component of velocity and a final y-component of velocity.
If an electron is traveling at a constant speed and enters the electric field between two charged plates of different voltage, what is the shape of the trajectory it makes while in between the two p
A parcel of air moving in a straight tube with a constant acceleration of -3.55 m/s2 and has a velocity of 14.5 m/s at 10:05:00 a.m. Describe the shape of a graph of velocity versus time for this parc
An object moves with constant acceleration 3.75 m/s2 and over a time interval reaches a final velocity of 13.6 m/s. (a) If its initial velocity is 6.8 m/s, what is its displacement during the time int
Two 69 g ice cubes are dropped into 234 g of water in a thermally insulated container. If the water is initially at 25°C, and the ice comes directly from a freezer at -15°C, what is the fina
An ambulance moving at 42 m/s sounds its siren whose frequency is 450Hz. A car is moving in the same direction as the ambulance at 25 m/s. What frequency does a person in the car hear (a) as the amb
Find the displacement amplitudes of the a) initial note and b) the final note. part c and d should be in pascals.
A subway train starts from rest at a station and accelerates at a rate of 1.64 for 13.1 . It runs at constant speed for 70.7 and slows down at a rate of 3.50 until it stops at the next station. Fin
Question- Two identical objects, each of rest mass m0, moving with equal but opposite velocities of 0.50c in the laboratory reference frame, collide and stick together. The resulting particle is at
Assuming 100% efficiency, (a) to what height can the motor lift a 5.0-g mass? (b) What initial voltage must the capacitor have if it is to lift a 5.0-g mass through a height of 1.0 cm?
A hot air balloon is rising upward with a constant speed of 15 m/s. When the balloon is 5 m above the ground, the balloonist accidentally drops a compass over the side. a.) How much time elapses bef
(a) What potential difference is required to bring the proton to rest? (b) What potential difference is required to reduce the initial speed of the proton by a factor of 2? (c) What potential differ
A proton is initially at rest at a point where the potential is 471 V. Some time later the proton is at a point where the potential is 185 V. If no force other than the electrostatic force acts on t
A lead ball is dropped into a lake from a diving board 18 ft. above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. If it reaches
The plates of a spherical capacitor have radii 31.0 mm and 32.0 mm. (a) Calculate the capacitance in picofarads. (b) What must be the plate area in square centimeters of a parallel-plate capacitor w
After flying for 15 min in a wind blowing 42 km/h at an angle of 34° south of east, an airplane pilot is over a town that is 44 km due north of the starting point. What is the speed of the airpl
A car is traveling over a hill. If, using a Cartesian coordinate system with origin O at the top of the hill, the hill;s profile is described by the function y=-(.003m^-1)x^2, where x and y are in m