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A speed skater moving across frictionless ice at9.6m/s hits a 5.0 m wide patch of rough ice. She slows steadily, then continues on at5.4m/s. What is her acceleration on the rough ice?
m/s2
A pilot flies an airplane at a constant speed of 520 km/hr in the vertical circle of radius 1400 m. compute the force exerted by the seat on the 105-kg pilot at point A and at point B.
A wire of resistance 9.0 is connected to a battery whose emf script e is 5.0 V and whose internal resistance is 1.0. How much energy appears in the wire as thermal energy in that time
A uniform disk of radius 0.469 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
At a dock, a crane lifts a 1200 kg container 30 m, swings it out over the deck of a frieghter, and lowers the container into the hold of the freighter, which is 10 m below the level of the dock. The acceleration of gravity is 9.8 m/s2. Neglect fri..
One cubic meter of water flowing over Niagara Falls in New York drops 92.2 meters. how much heat energy would the water have
A 98 ? resistor is connected in series with a 177 mH inductor and a 1.4 ?F capacitor. Find the effective voltage Vrms across the capacitor
RLC alternating current circuit with a 25 ohm resistor, What is the average power when operating at twice the resonant frequency
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the laser beam can ionize the air, At this maximum intensity, what power can be delivered in a cylindrical beam of diameter 3.98 mm
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth
A friend is standing on a giant skateboard that is initially at rest. If you avoid frictional effects with the floor, what is the momentum of the skateboard if your friend walks to the right on skateboard with a momentum of 150 kg.m/s? What is the..
A 6000 ohm resistor is joined in series with a 70 uF capacitor. what is the capacitive time constant of this combonation
In this problem you will determine the distance to Jupiter by applying F=ma for circular orbits. By observing Jupiter we can determine that it takes 11.895 years to orbit the Sun. determine the distance of Jupiter from the Sun
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