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A hot- air balloon is ascending at the rate of 12m/s and is 80 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. What must be the horizontal distance between the saddle and limb when the ranch hand makes his move
Two identical particles, both of mass m and charge q, What is the speed of each particle when they are a distance 2d apart
Two 3.5 kg bodies, A and B, collide. The velocities before the collision are A = (21 + 30) m/s and B = (-34 + 11) m/s. After the collision, ′A = (-4.5 + 16) m/s.
A marble is thrown horizontally with a speed of 19.0 m/s from the top of building. When it strikes the ground, marble has a velocity that makes an angle 75° with the horizontal. From what height above the ground was the marble thrown.
The focal length of an objective lens is 4.60mm . The image formed by this lens is 145mm from its focal point. find the magnitude of the angular magnification of the microscope
If we want to have successive fringes on a screen 5.9 cm apart near the center of the pattern, where should we place the screen
the terminal voltage of a certain battery is measured with the battery disconnected and is found to be 5.94 v. the
An electric car accelerates for 8.0 s by drawing energy from its 345-V battery pack. During this time, Find the minimum horsepower rating of the car
A 117-cm-long, 4.00g string oscillates in its n = 4 mode with a frequency of 200 Hz and a maximum amplitude of 5.50 mm. What is the tension in the string
A 1.80 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 14.9 m/s. Calculate the induced emf between the ends of the wire
Two 1.5cm -diameter disks face each other, 1.1mm apart. They are charged to ±20nC. What is the electric field strength between the disks
two particles of mass m1 1.5 kg and m2 2.2 kg are traveling with velocities v1 4.5 ms and v2 2.9 ms as shown in the
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