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You have decided to make a large cooler to store meat. Calculate the net rate of heat flow per second out of the cooler if the interior temperature is 5 C and the exterior temperature can be 45 C
A U-236 nucleus fissions directly into Xe-138 and Sr-98 without the emission of neutrons. What is the fraction of the total kinetic energy released is carried by the lighter fragment
An 8300-pF capacitor holds plus and minus charges of 1.35×10?7C. What is the voltage across the capacitor
What is the current in the element of an electric clothes dryer with a resistance of 8.2? when it is connected to 240 V
A 75-W, 120-V bulb is connected in parallel with a35-W, 120-V bulb. What is the net resistance
A soccer player kicks a ball toward a wall 15.0 m away, with velocity 25.0 m/s at 30.0 above the horizontal. Determine how high up the opposite wall the ball hits, and nd the impact velocity
A potential difference of 5.60 V will be applied to a 33.00 m length of 18-gauge tungsten wire (diameter = 0.0400inches). Calculate the current and Calculate the current density
A block of ice weighs 100 N. You can lift the block vertically a distance of 2 m. You can also push the same block up a ramp that is 4 m long, What is the increase in the block's gravitational poten
The tension in a ligament in the human knee is approximately proportional to the extension of the ligament, What is the tension in this ligament when it is stretched by 0.67 cm
the following factors controlling the synthesis of acetyl CoA in muscle and liver include all of the following EXCEPT: a. a high carbohydrate meal will influence the movement of fatty acids across t
Carbon dioxide gas is heated as it flows steadily through a 2.5-cm-diameter pipe. At the inlet, the pressure is 2 bar, determine the rate of heat transfer to the carbon dioxide, in kW
When 2.0 x 10^2 mole of nicotinic acid (a monoprotic acid is dissolved in 350 mL of water, the pH is 3.05. What is the Ka of nicotinic acid
A 3.83m -long coil containing 225 loops is wound on an iron core (average ?=1850?0) along with a second coil of 115 loops, Determine the mutual inductance M. (units of H)
aniline, an organic amine, C6H5NH2, a weak base with Kb of 4.0x10^-10, reacts with water to form its conjugate acid, C6H5NH3^+. write the equation and the base dissociation constant for aniline.
Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.2 mm, What is the resistance ratio RA/RB , measured between their ends
what is the conjugate base of HPO4^2-? c)which acid has the weaker conjugate base? d)which acid has the stronger conjugate base? e)which acid produces more ions
If the correct mass percentage of HC2H3O2 in the vinegar is 5.40%, why does trial 2 give the best results. What is the percent error of this trial
As a technician in a large pharmaceutical research firm, you need to produce 200 mL of 1.00 M a phosphate buffer solution of pH = 7.06. The pKa of H_2PO_4}^- is 7.21. You have 2.00 L of 1.00 M KH_2P
How many grams of dry NH_4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.79? K_b for ammonia is 1.8 times 10^{-5}.
As a technician in a large pharmaceutical research firm, you need to produce 400 mL of 1.00 M potassium phosphate buffer solution of pH = 7.29. The pKa of H_2PO_4^- is 7.21.
A typical compact disc stores information in tiny pits on the disc's surface. What's the frequency of electromagnetic waves that have a wavelength equal to the typical CD pit size
Calculate the pH of a solution containing an amphetamine concentration of 200 mg/L. Express your answer to one decimal place.
A solid steel rod of length 120-cm and mass 450 grams, is rotated about its center with an angular acceleration 23 rad/s2. What is the moment of inertia of the rod, What is the net torque acting on
What is the composition of anti-dust chalk? What are differences between normal blackboard chalk and anti-dust chalk? What made anti-dust chalk anti-dust? Explain in details.
Two positive charges, one of magntude Q and the other of magnitude 2Q, and one negative charge of magnitude -Q are placed on a straight line, Find both the magnitude and direction of the net force on