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Jim's dog Sparky runs 45.0m northeast to a tree, then 65.0m west to a second tree, and finally 25.0m south to a third tree. Calculate the direction of Sparky's net displacement
A 20kg box slides up a 12m long incline at an angle of 30 degrees with the horizontal. What is the change in gravitational potential energy
A telescope has an objective with a refractive power of 1.00 diopters and an eyepiece with a refractive power of 300 diopters
Two equally charged, 1.00 {\rm g} spheres are placed with 2.00 {\rm cm} between their centers. What is the magnitude of the charge on each sphere
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
Glass tempering can be accomplished by both thermal and chemical means. Each puts the near surface region of the glass piece into compression, thereby suppressing growth of surface cracks.
A 20.0 kg mass at rests decays into a particle that is moving at 0.30c. What is the mass of this new particle
A helium-neon laser of = 633 illuminates a diffraction grating. The distance between the two m= 1 bright fringes is 36.0 cm on a screen 2.40 m behind the grating. What is the spacing between slits o
A secondary alkyl halide reacts with a weak nucleophile. The reaction will proceed via which of the following mechanisms? A) SN1 B) SN2 C) E1 D) E2 E) SN1 and E1
What molarity of aqueous calcium chloride solution can be expected to show the same conductivity as 0.0050 M aluminum sulfate at 12,500 units.
A body moves with respect to a stationary reference point. At time 1.0 s, position of the body is given by vector R1 bar that points to the east of the reference point, Find the average velocity of
As a technician in a large pharmaceutical research firm, you need to produce 150.mL of a 1.00 M phosphate buffer solution of pH = 7.10. The pKa of H2PO4- is 7.21.
An elevator car of mass 780 kg falls from rest 3.10 m, hits a buffer spring, and then travels an additional 0.390 m, What is the force constant of the spring
A 3.40 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, Find the maximum compression of the spring
Consider the following reaction: A(g)= B(g)+C(g) Find the equilibrium concentrations of A, B, and C for each of the following different values of Kc. Assume that the initial concentration of A in ea
Consider the following reaction: HC2H3O2 (aq) + H2O (l) = H3O+ (aq) + C2H3O2- (aq) Kc=1.8*10^-5 at 25C If a solution initially contains 0.260M HC2H3O2, what is the equilibrium concentration of H3O+
Choose one specific receptor to discuss: include the specific role of this receptor in the target cancer and the effects on the cell resulting from aberrant expression or dysregulation of the recept
Consider a solution that contains 66.0% R isomer and 34.0% S isomer. If the observed specific rotation of the mixture is -30.0°, what is the specific rotation of the pure R isomer
On prolonged heating with concentrated hydrochloric acid, 2, 2-dimethyl-1-propanol, a primary alcohol, reacts to give 2-chloro-2methylbutane. provide a stepwise mechanism for this reaction
A generator at a power plant produces a voltage of 9.00 kV and current 150 A. How much power is lost as waste heat in the transmission line
If a pure R isomer has a specific rotation of -133.0°, and a sample contains 64.0% of the R isomer and 36.0% of its enantiomer, what is the observed specific rotation of the mixture
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, How far from the castle wall does the launched rock hit the ground
The enthalpy change when 1 mol methane (CH4) is burned is -890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g of wate
A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory, What was the ball's launch angle