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When a slice of buttered toast is accidentally pushed over the edge of a counter, it rotates as it falls. If the distance to the floor is 76 centimeter and for rotation less than 1 rev, Determine the
(a) the smallest and
(b) largest angular speeds that cause the toast to hit and then topple to be butter side down? Suppose free-fall acceleration to be equal to 9.81 m/s^2.
Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium
If astronauts could travel at v = 0.970c, we on Earth would say it takes (4.20 / 0.970)= 4.33 years to reach Alpha Centauri, 4.20 light years away. The astronauts disagree. How much time passes on the astronauts' clocks?
A crate whose mass m is 360 kg on the bed of a truck that is moving at 120km/h. What force (assumed constant) acts on the crate during this time
Two boats start together and race across a 68 km wide lake and back. Boat A goes across at 68 km/h and returns at 68 km/h. What is the average velocity of the winning boat
you have a mechanism by which you can use a magnetic spectrograph to chose the energy of the beta rays from a 137cs
What magnitude of charge must be given to the drop
The intake in the figure has cross-sectional area of 0.80 m2 and water flow at 0.41 m/s. What is the pressure difference between inlet and outlet
Several bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.22*10-8 m, and a tangential speed at the rim of 2.41*10-5 m/s.
A picture is supported by two cords each making an angle of 53degree with the horizontal. If the tension in each cord is 10N what is the weight of the picture
"A 200 lb man jumps out of a window into a fire net 30 ft below. The net stretches 6 ft vertically before bring in the man to rest and tossing him back into the air. The maximum potential energy in (ft lb) of the net is:”
12.0g of aluminum at 200C and 20.0g of copper are dropped into 51.0cm^3 of ethyl alcohol at 15C. What is the initial Temp of Copper
When a 5.00 kilogram object is hung vertically on a certain light spring that obeys Hooke's law, the spring stretches 2.80 centimeter. If the 5.00 kilogram object is removed, find how far will the spring stretch if a 1.50 kilogram block is hung on i..
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