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The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 30 m radius of curvature. What is the car's speed at the bottom of the dip? express answer in two sig figs
= ________ m/s
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is h. What was the direction of the mug's velocity just before it hit the floor
a solid, uniform sphere (r=20 cm, density= 850 kg/m cubed) is attached by a massless cable to the ceiling of a room, find the apparent weight (the reading on the scale) when the cable tension is
A force FT is applied to a cord wrapped around a pulley with moment of inertia I = 0.295 kg · m2 and radius R0 = 33.0 cm, what is the linear speed of a point on its rim 7.0 s later
What is an average acceleration of the dragonfly
Suppose a car is traveling at +20.7 m/s, and the driver sees a traffic light turn red. After 0.314 s has elapsed (the reaction time), What is the stopping distance of the car
In a museum exhibit, three equal weights are hung with identical wires. Each wire can support a tension of no more than 72.0N without breaking. Under these conditions, what is the tension in the middle wire
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail and the nail deflects downward by 2.00 x 10^-5. what is the diameter of the nail
Sunlight strikes a piece of crown glass at an angle of incidence of 30.0 degrees. Calculate the difference in the angle of refraction between a red (660.0 nm) and a blue (470.0 nm) ray
(a) Calculate the ratio of the electric potential at the surface of the large sphere to that of the small sphere. (b) Calculate the ratio of the magnitudes of the electric fields at the surface of the large sphere to that of the small sphere.
In a hydroelectric installation, a turbine delivers 1890 hp to a generator, which in turn converts 37.9% of the mechanical energy into electrical energy. Under these conditions,
River Pascal with a volume flow rate of 3.4x10^5 L/s joins with river Archimedes, which carries 1.12x10^6 L/s, to form the Bernoulli River. What is the speed of the water in the Bernoulli River
An electron is launched at 3.20x10 6 m/s into a 6.30 T magnetic field. What is the diameter of its orbit, what is the magnitude of the force on the wire
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