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Ricardo, mass 80 kilogram, and Carmelita, who is lighter, are enjoying Lake Merced at dusk in a 30 kilogram canoe. When the canoe is at rest in the placid water, they exchange seats, which are 3.0 meter apart and symmetrically placed with respect to the canoe's center. Ricardo notices that the canoe moved 50 centimeter relative to a submerged log during the exchange and determine Carmelita mass, which she has not told him. What is it?
The spring in a clothespin is compressed 0.40 cm, storing energy in the form of spring potential energy. If the spring is compressed twice as far, the spring potential energy increases with 0.0046 J. What is the force constant, k, for this spring?
A 17,000-kg airplane lands with a speed of 82 m/s on a stationary aircraft carrier deck that is 115 m long. Find the work done by no conservative forces in stopping the plane.
A bicycle rim has a diameter of 0.65 {\rm m} and a moment of inertia, gauged about its center, of 0.25 {\rm kg}\cdot{\rm m^2}.What is the mass of the rim? Express your answer to two important figures and include the appropriate units.
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. Determine how much time elapses between an instant when the object's speed is at a maximum and the next instant when its acceleration is at a maxi..
A painter wishes to know whether or not he can safely stand on a ladder. Determine the maximum mass of the painter for which the ladder will remain stable when he climbs a distance d =4.9 meter up the ladder
What is the probability that a test comes back positive-indicating oil and what is the probability that there is oil in teh ground, if the test comes back positive?
he lifting force exerted on an airplane wing varies jointly as the area of the surface and the square of the planes velocity. Determine the lift if the speed is decreased to 80 mph
A basketball player makes a jump shot. The 0.550 kilogram ball is released at a height of 2.10 meter above the floor with a speed of 7.00 m/s. Determine the work done on the ball by air resistance
A block with a coefficient of kinetic friction μk =0.4 slides down a 30 degree inclined plane. Estimate what acceleration does it experience
There is a clever kitchen gadget for drying lettuce leaves after you wash them. Obtain the magnitude of centripetal acceleration at the outer wall
A circuit consists of a .15 microF capacitor, a 600 ohms resistor, and a 70mH inductor in series. Calculate the rms current flow
The recovery time of a hot water heater is the time required to heat all the water in the unit to the desired temperature. determine the recovery time (in hours) of the unit
A 0.62 kg brass candlestick has an initial temperature of 98.0 degrees C. what is the specific heat compacity of brass
At one end of a ripple tank 90 cm across, a 6 Hz vibratorproduces waves whose wavelength is 50 mm. Find the time the waves need to cross the tank
A 9.4-kg watermelon (30 degrees)and a 7.8-kg pumpkin (53 degrees) attached to each other via a cord that wraps over a pulley, Find the accelerations of the pumpkin and the watermelon
A block is released and slides without friction down at plane inclined at angle theta from the horizontal. Calculate the height of the incline
A transformer is designed to change 120V into 10,000V, andthere are 164 turns in the primary coil. How many turns are in the secondary coil
A spherical metallic Christmas tree ornament has a diameter of 6.20 cm. If Saint Nicholas is by the fireplace, 1.41 m away, where will he see his reflection in the ornament
A uniform magnetic field passes through a horizontal circular wire loop at an angle 17.3° from the normal to plane of the loop. determine the magnetic flux through the loop
A 3.30-g copper coin at 21.0°C drops 45.0 m to the ground. (Assume the specific heat of copper is 387 J/kg · °C.) determine the coin's final temperature
In a material having an index of refraction n , a light ray has frequency f, wavelength ?, and speed v. What is the frequency of this light in vacuum and in a material having refractive index n1
Find out the relative rates at which clocks go at two different distances r1 and r2 from the center of the earth.
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