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An electric heater carries a current of 16.5 A when operating at a voltage of 1.50 102 V. What is the resistance of the heater
Twenty particles, each of mass m0 and confined to a volume V, have various speeds: two have speed v, FIND the pressure they exert on the walls of the vessel
Some aromatic compounds also undergo nucleophilic substitution, propose a mechanism for this reaction and indicate what types of substituents would be expected to be most reactive
at time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0* above the + axis. What is the velocity of the puck at time t = 1.50 s
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of West. find the velocity of the boat with respect to the ground
What volumes of water (steam) and nitrogen monoxide are measure under same conditions of T and P.
tennis ball A is dropped from a height of 15 m. Tennis ball B is thrown horizontally from a height of 15 m with a horizontal velocity of 25 m/s
Express your answer as a chemical equation. Enter NOREACTION if no reaction occurs. Identify all of the phases in your answer.
The half-life of carbon-14 is 5730 years. Therefore, 5730 years after being cut from a tree, a piece of wood will have 50.0 % of the carbon-14 that it had originally. What percentage of the original
The label on a bottle of concentrated HCl says the contents are 36% HCl by mass and have a density of 1.179 g/mL. What is the Molarity of the Conc. HCl.
A shot putter releases the shot with a velocity of 29m/sec at an angle of 22 degrees counterclockwise with the right horizontal
Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the ^14C has decayed to 1/32.0 of the original amount. How long ago was this plant alive
A nurse administered 3.50mL of a radioisotope solution that has an activity of 135pCi/mL. What total dose of the radioisotope did the patient receive
At t = 0, a stone is dropped from a cliff above a lake; 2.2 seconds later another stone is thrown downward from the same point with an initial speed of 48.0 m/s. Find the height of the cliff
A billiard ball rolling across a table to the right at 1.4 m/s makes a head-on elastic collision with an identical ball. The mass of a billiard ball is 34 g. find the velocity of the second ball aft
In the distillation of a flammable mixture why is it important to keep the graduated cylinder distillation receiver as high up the bottom of the bent vacuum adapter as possible
A volume of 40.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2 mL of 1.50 M H2SO4 was neede
Consider resistors R1 and R2 connected in series E R1 R2 and in parallel E R1 R2 to a source of emf E that has no internal resistance. How does the power dissipated by the resistors
A turntable 1.90 m in diameter rotates at 78.0 rpm . Two speakers, each giving off sound of wavelength 30.6 cm, find the greatest beat frequency the listener
An analyst collects and melts 555.0 g of snow. a 100 g portion of the resulting water is made basic with ammonia, treated with cyanide and to mask other metal ions, and then extracted with 10.0 mL o
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, H2O2, can be titrated against a solution of potassium
a projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal. what is the range of the projectile
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of East. What is the velocity of the boat
trumpet creates a sound intensity level of 1.23 x 10^2 dB at a distance of 0.80 m. What is the sound intensity of a trumpet
When a 9.92-g sample of gaseous hydrogen bromide dissolves in 45.5 g of water in a coffee-cup calorimeter the temperature rises from 25.00 oC to 69.79 oC. Calculate H in kJ per mol of HBr for the s