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When the particle moves with a velocity v2 = 2.0 x 104 m/s along the x-axis, there is a force F2 of 4.0 x 10-5N exerted on it along the y-axis. Calculate the magnitude and direction of the magnetic fi
A limestone sample was analyzed for its calcium oxide (CaO) content. A 0.3333 g sample was dissolved in concentrated HCl. The calcium was precipitated by adding an excess of ammonium oxalate and suf
How far must the key be depressed for a keystroke to be registered, which happens when the capacitance increases by 3.9 pF (pico Farads)?
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50L of water if the coldest winter temperature in your area is -20 degree celsius?
Describe the processes that occur as energy is being removed from the water to make ice. Calculate the energy that must be removed from the water to make ice cubes at -8.00 degrees c.
The three capacitors C=2.0 uF (micro Farad) in parallel are connected across a 30- battery. A. Find the charge on each capacitor. B. Find the potential difference across each.
If the coefficient of static friction between tires and pavement is 0.55, calculate the minimum torque that must be applied to the 70 cm-diameter tire of a 980 kg automobile in order to "lay rubber"
In a Little League baseball game, the 145 {\rm g} ball enters the strike zone with a speed of 15.0 {\rm m/s}. The batter hits the ball, and it leaves his bat with a speed of 20.0 {\rm m/s} in exactl
Liquid mixtures of sodium and potassium are used in some nuclear reactors as coolants that can survive the intense radiation inside reactor cores.
Naturally occurring zirconium exists as five stable isotopes: 90Zr with a mass of 89.905 amu (51.45%); 91Zr with a mass of 90.906 amu (11.22%);
How do the temperature of combustion and the temperatures of collant and exhaust affect the efficiency of automobile engines?
0.266 mol of a solid was dissolved in 300 mL of water at 21.9 oC in a styrofoam cup calorimeter. After the solid had fully dissolved, the final temperature of the solution was 28.8 oC. What is the
Two speakers 10m apart and facing each other emit identical in phase sound waves. if you stand between the speakers 2m from one of them on a day when the temperature is 20 degrees Celsius and can he
How much heat would be needed if the heating is at constant volume? Also how much heat is needed if the heating is at constant pressure?
At what horizontal distance from the top of the slope, from where she took off, will she land? This will be 50.0 m below where she took off. The thrust of the skis is parallel to the skis. There is
On a day when the temperature is 20 degrees C, a child steals your tuning fork of frequency 512 hz, begins ringing it, and runs away. You chase after the child running with a speed of 5m/s. if you h
A projectile is launched with an initial speed of 40 m/s at an angle of 20° above the horizontal. The projectile lands on a hillside 3 s later. Neglect air friction. (a) What is the projectile's
500J of work is done to compress the gas while, in the same process, 1400J of heat energy is transferred from the gas to the environment. Afterward what is the rms speed of the molecules?
How much of a 6 M Na2CO3 stick do you need to make 100mL of a 10% Na2CO3 working solution. Describe how you would make the same solution given a bottle of anhydrous sodium carbonate (MW= 105.99g/mol
At what distance from the wall should this mirror be placed so that a real image of the object is formed on the wall? What is the magnification of the image?
The mass of platinum is 21.4 x 103 kg/m3. A platinum wire with a radius of 0.500mm, 1.20 m long fixed at both ends has a frequency of vibration for its third harmonic equal to 512hz. What is the ten
A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: C 8 H 18 . What is the percentages of carbon and hydro
The skater tosses a coin horizontally over her shoulder straight behind her. The coin leaves her hand at 5 m/s (relative to the hand). What is the speed of the coin as viewed by a person standing st
Explain the fact that acetic acid can be extracted quantitatively from an ether solution by dilute sodium hydroxide solution. write chemical equations for any reactions involved.
The age of any remains from a once-living organism can be determined by radiocarbon dating, a procedure that works by determining the concentration of radioactive 14C in the remains.