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To make tea Tom boiled some water in a kettle. The kettle used 320 000 J of energy. It took 80 000 J to boil the water to make his tea.The rest of the energy was wasted. Calculate the efficiency of this method of making a cup of tea.
four identical metallic objects carry the following charges 1.29 6.21 -4.54 and -9.14c. the objects are brought
The position of a 60-gram golf ball sitting on a teeis determined within +- μm. how far would the ball move in a year
An insect 1.1 millimeter tall is located 0.8 millimeter beyond the focal point of the objective lens of a compound microscope. Find where is the image formed by the objective lens
7.9 mol of helium are in a 14 L cylinder. The pressure gauge on the cylinder reads 68 psi. What is the average kinetic energy of a helium atom
Walk 10 miles in the direction 54 degrees east of due north. Then walk 4 miles in the direction 23 degrees south of due east. How far will you be from your starting point?
A Light from a 556-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 51°. What is the angle of reflection (in degrees) from the surface
q1. a map suggests that atlanta is 730 miles in a direction 5.00 degrees north of east from dallas. the similar map
The electric potential on the surface of a conductor (in static equilibrium) is 5V. find electric potential in the interior of the conductor
A 36 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.1 m-long string. The balls undergo a head-on, perfectly elastic collision, after which 110 g ball swings out to a maximum angle theta_..
earth's speed in its orbit about the sun is about 30 km/s. What is earth's acceleration?
questionnbspnbspa particle has initial velocity 5 ms due east and acceleration 2 ms2 due west. find the distance
Many star are observed to have rotation periods that lengthenslightly with time, a phenomenon called "spin down." The rate ofslowing of the Crab Star is 3.50*10-13 s per second, which implies that if thisrate remains constant, the Crab Comet will s..
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