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What is one simple way to get around this and get a reasonably accurate experimental value for the acceleration due to gravity?
The length of the major axis of hte track is 1.60 km and the length of the minor axis is 0.80 km. The circumference of the racetrack is 3.87 km. What would be the average velocity and average accele
A piano tuner use a 440 Hz tunning fork to toune a string that is currently vibrating at 445 Hz. How many beats per second does he hear? What other frequencies could produce the same sound effect?
If 930 mL of 0.0185 M aqueous Na2CO3 and 800 mL of 0.0413 M aqueous HCl are reacted, what volume (L) of gaseous CO2 measured at 0.5 atm pressure and 309 Kis produced.
The reflecting surfaces of two mirrors form a vertex with an angle of 130 degrees. If a ray of light strikes mirror 1 with an angle of incidence of 59 degrees, find the angle of reflection of the ra
A certain soft drink was analyzed and found to contain 0.080 M H+. Other ingredients of the drink include sugaror, in the diet form of the drink, an artificial sweetener.
When roads are icy, wet, or snowy, front-wheel drive cars (cars whose front wheels provide the force to accelerate the car forward) are generally more stable than rear-wheel drive cars (cars whose b
A blender (a kitchen appliance) has blades that rotate at 7500 rpm. When the motor is turned off, the blades stop in 3 s. Find how many complete rotations (including fractions thereof) do the blades t
An exothermic reaction A-->B, was carried out in dilute aqueous solution in a calorimeter. 80.0mL of deionized water was in the calorimeter and 0.24 mole of A is used.
A digital thermometer employs a thermistor as the temperature-sensing element. A thermistor is a kind of semiconductor and has a large negative temperature coefficient of resistivity
A floating ice block is pushed through a displacement d = (11 m) i - (11 m) j along a straight embankment by rushing water, which exerts a force F = (169 N) i - (160 N) j on the block. How much work
The reaction of phenylmagnesium bromide with benzophenone to formthe salt of triphenylmethanol is an example of nucleophilic addition; its reaction with ethyl benzoate to yield the same product invo
The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9 . An astronomer stands 21.2 in front of this mirror.
A 3 kg block starts from restat the top of a 30° incline and slides at a distance of 2 m down the incline in 1.50 s. Find: a) the magnitude of the acceleration of the block
In this case, the ski boat is traveling at 15.3 m/s and the tension in the rope is 76.5 N. If the boat does 3390 J of work on the skier in 51.0 m, what is the angle between the tow rope and the cent
The other half is supported by the vertical forces of the ground on his feet. Assuming the person is moving with constant velocity and the force exerted by the ground on the crutches acts along the
In an Atwood machine m1= 2 kg and m2= 7 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is
The maximum torque experienced by a coil in a 0.50 T magnetic field is 8.4 x 10-4 N · m. The coil is circular and consists of only one turn. The current in the coil is 3.1 A. What is the lengt
A singly charged positive ion has a mass of 2.50*10^-26 kg. After being accelerated through a potential difference of 250V, the ion enters a magnetic field of 0.500 T, in a direction perpendicular t
The "power cube" transformer for a portable CD player has an output of 4.6V and 600mA (both rms) when plugged into a 120V/60Hz outlet. If the primary coil has 1250 turns of wire, how many turns are
The string on side B is retied and now has only half the length of the string on side A. Find the magnitude of the initial acceleration of the end B when the string is cut.
How do antagonistic mechanisms manage homeostatic regulation in plants, how do antagonistic mechanisms manage homeostatic regulation in plants and animals?
A wheel of diameter 38.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. A force = (-30.0 + 40.0 ) N acts at a point on the edge of the wheel that lie
If you have a bar 42 cm long and pinned (an axis) at one end, and you have to exert a force of 9.7 N upward in the middle to keep it in equilibrium, what is the necessary mass hanging on the far end
What are the magnitude and direction of the electric field 12.5 cm directly above an isolated 38.5 10-6 C charge?