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A whale swims due east for a distance of 8.0 km in a time of 2.50 h. It then turns around and moves west for 2.0 km in a time of 0.50 h. It turns around again and heads 4.0 km due east in a time of 1.00 h.
A satellite is in a circular orbit just above the surface of themoon. The radius of the moon is 1738 km. What is the period of the satellite orbit
a circus performer stretches a tightrope between two towers. he strikes one end of the rope and sends a wave along it
The SI units of mass density are kg/m3, but there are several other common units. One of the most commonly used units of mass density is gram per cubic centimeter, or g/cc. Calculate the buoyant force on the mass
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 1.84 cm. what mass of ethanol diffuses through the cylinder
A step-down transformer is used for recharging the batteries of portable devices such as tape players. find the voltage supplied to a tape player from the transformer
A Ferris wheel rotating at 20 rad/s slows down with a constant angular acceleration of magnitude 5.0 rad/s2. Obtain how many revolutions does it make while slowing down before coming to rest
In a television set, electrons are accelerated from rest through apotential difference of 20 kV. Theelectrons then pass through a 0.29 Tmagnetic field that deflects them to the appropriate spot on the screen.
The surface waters of tropical oceans are at a temperature of 28?C while water at a depth of 1200 m is at 3?C. What is the maximum efficiency possible of such a heat engine
When it rains, water vapor in the air condenses into liquid water, and energy is released. (a) How much energy is released when 0.0285 m (1.12 inch) of rain falls over an area of 2.59×106 m2 (one square mile)? (b) If the average energy needed to h..
What is the magnetic flux through the coil? The magnetic field through the coil is increased steadily to 0.100 T over a time interval of 0.50 sec. What is the magnitude of the emf induced in the coil during the time interval?
Suppose you have two boxes that conceal what is inside, althougheach has two wires coming out of the interior. You have atyour disposal some batteries, wire and identical flash tlight bulbs.
The intensity of sunlight at the top of the Earth's atmosphere is about 1360W/m^2. What is the total power emitted by the Sun
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