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Silver pellets with a mass of 0.90g and a temperature of 84C are added to 210g of water at 14C.
A) How many pellets must be added to increase the equilibrium temperature of the system to 26C? Assume no heat is exchanged with the surroundings.
Two wooden crates rest on top of one another. The smaller top crate has a mass of m1=20kg and the larger bottom crate has a mass of m2=88kg. what is the acceleration of the lower crate
A middle-aged people usually have poorer hearing than a middle-aged woman. Find the ratio of the sound intensity just detected by person to the sound intensity just detected by woman
The "size" of the nucleus in Rutherford's model of the atom is about 1.00 fm = 1.00E-15 m. Determine (in MeV) the electrostatic potential energy of the pair of protons
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.30m long and 1.50m high. How many seconds elapsed on your watch when she saw 22.0s pass on hers
A 60 skydiver can be modeled as a rectangular "box" with dimensions 21 41 1.8. What is his terminal speed if he falls feet first
Three carts of masses Three carts of masses m1=6.0 kg, m2=12.0 kg, and m3=5.0 kg move on africtionless horizontal track with speeds of v1 =5.0 m/s, v2 =3.0 m/s, and v3 =-4.0 m/s,as shown in Figure . The carts stick together after colliding. Find t..
A steel pipe has a length of 10.7 metres at 20C. What is the increase in its length if the steam at 420C runs through this pipe? The coefficient of expansion for steel is 11x10-6 m/ 0Cm.
the plates of a parallel-plate capacitor are 3.28mm apart and each has an area of 12.2 cm2. each plate carries a charge
A rocket-powered hockey puck has a thrust of 1.60N and a total mass of 2.10kg. How far does the puck land from the base of the table
four long parallel wires each carry 2.0 a in the same direction. they are parallel to the z-axis and they pass through
Two glass plates are separated with fine wires, with diameters d1 = 0.0500 mm and d2 = 0.0520 mm, as indicated in the figure. The wires are parallel and separated with a distance of L =6.80 cm. If monochromatic light with λ = 500 nm is incident from ..
an electron in an x-ray machine is accelerated through a potential difference of 1.00 times 104 v before it hits the
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