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A boat is traveling upstream at 14 km/h with respect to thewater of a river. The water itself is flowing at 9 km/h withrespect to the ground.
a.) What is the velocity of the boat with respect to theground?
b.) A child on the boat walks from front to rear at 6 km/hwith respect to the boat. What is the child's velocity with respectto the ground?
A long, narrow rectangular loop of wire is moving toward the bottom of page with a speed of 0.025 m/s. The loop is leaving a region in which a 2.1 T magnetic field exists; magnetic field outside this region is zero. All through the time of 1.0 s, wha..
Two point charges q = 74.0 nC and q = -74.0 nC are in vacuum located on the x axis at -30.0 cm and 30.0 cm, calculate the total electric flux through the y-z plane
A box of books is initially at rest a distance D = 0.530 m from the end of a wooden board. Find the speed of the box as it reaches the end of the board
You exert a force as shown in the diagram to push a large crate of books (about 1 m high, m = 45.0 kg) across a rough floor at constant speed v = 0.650 m/s. Find the rate at which work is done by you
You connect five identical resistors in series to a battery whose EMF is 12.0 V and whose internal resistance is negligible. What are the resistance of each resistor and the potential difference across each resistor
You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 48.7%u2218C. what is its temperature in degrees Fahrenheit
Keeping a constant speed of 0.6 m/s, a marble of mass 18 g rolls back & forth across a shoebox that is 14 cm high & 2 mm thick. Estimate the probability of its escaping through the wall of the box by quantum tunnelling.
An airplane flies due north in a region where Earth's magnetic field has magnitude 5.3×10?5T, declination 0?, and inclination 75?. What's the induced emf between the wingtips, 36 m apart, when the plane flies at 230m/s
The escape speed of a particular planet with a radius of 7.900e+6 m is 14,500 m/s. What is the mass of the planet
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
A 60-kg runner expends 295 W of power while running a marathon. determine the mass of bodily fluid (assume it is water) lost per hour
At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of hexane in the vapour that is in equilibrium with this solution
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