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A solid normally absorbs heat as it melts, but there is a known exception at temperatures close to absolute zero. Find out which solid it is and give a physical explanation for it.
A positive charge q=3.2 x 10^-19 C moves with a velocity v=(2i + 3j - k)m/s through a region where both a uniform magnetic field, What angle does the force vector make relative to the positive x axis
Two blocks, Block1 (larger block), and Block2=3.0kg are pulled across a horizontal level, friction free surface by a horizontal force, F=20N. What is the mass of the larger block
Our closest stellar neighbor , alfa-centauri , is 4.3 light years away.it has been suggested that TV programs from our planet have reached this star and may have been viewed by the hypothetical inhabitants of a hypothetical planet orbiting this st..
For an RLC circuit with a resistance of 15 Kohms , a capacitance of 9 uF and an inductance of 31 H , what frequency is needed to minimize the impedance
A vector has components of 10.0 units along the x axis and 11.0 units along the y axis. What is the magnitude of the vector
when a 50-gram piece of aluminum at 100 degrees celsius is placed in water it loses 735 calories of heat while cooling
A tennis player swings her 1000 g racket with a speed of 15.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 15.0m/s. compute the average force that the racket exerts on the ball
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
A small sphere with a mass of 1.0 g is suspended at the end of an insulating string of length 50 cm within a uniform horizontal electric eld of 12,000 N/C. What is the value of the charge on the small sphere
A horse canters away from its trainer in a straight line,moving 150 m away in 11.0 s. It then turns abruptly and gallops halfwayback in 4.5 s. Calculate its average speed.
A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +52 N·m is applied to the wheel for 15 s, giving the wheel anangular velocity of +520 rev/min.
A 1000 {rm kg} wrecking ball hangs from a 15 {rm m}-long cable. The ball is pulled back until cable makes an angle of 25.0^circle with the vertical. By how much has the gravitational potential energy of the ball changed .
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