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The drawing shows two boxes resting on frictionless ramps. Onebox is relatively light and sits on a steep ramp. The other box isheavier and rests on a ramp that is less steep. The boxes arereleased from rest at A and allowed to slide down the ramps. Thetwo boxes have masses of 9 and 38 kg. If A and B are3.0 and 1.5 m, respectively, above the ground,determine the speed of (a) the lighter box and(b) the heavier box when each reaches B.(c) What is the ratio of the kinetic energy of the heavier box to that of the lighter box at B?
Calculate the time it takes the sled to travel 21 m down the slope and draw a free-body diagram for the sled sliding down the slope.
A 1.3 m length of wire carrying 5.9 A of current toward the south is oriented horizontally. Estimate the magnitude of the magnetic force on the wire due to the Earth's magnetic field of 5.5 ? 10-5 T at this point
An electron is located on a pinpoint having a diameter of 1.90 µm. What is the minimum uncertainty in the speed of the electron
A motorcycle daredevil is attempting to jump across as many buses as possible, What is the maximum number of buses over which the cyclist can jump
An air-track glider attached to a spring oscillates between the 12.0cm mark and the 61.0cm mark on the track. find maximum speed of the glider
A runner approaching the start/finish line hears the bell signaling one lap to go. The bell emits a 352 Hz tone, How fast is she going
Consider a simple model for the interior of the Earth: there is a spherical iron core with constant mass density ?0 and radius a; outside the core is "rock" with constant density ?1. Calculate the radius a of the iron core
A projectile is red from level ground at an angle of 30 degree above the horizon. It hits the ground at t = 4 s. What is the magnitude of the initial velocity, v?
a car travels at a constant speed around a circular track whose radius is 2.6 km. the car goes once around the track in
During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.10 108 V, What is the change in an electron's electric potential energy
A typical adult human lung is about 2.05 liters and is made up of large numbers of small spherical cavities called alveoli. how many avioli are there in the lung
question an object is placed 14.6 cm in front of a concave mirror with a focal length equal to 3.00 cm. a find the
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