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A NASA satellite showed that in 2003 the ozone hole was much larger than it was in 2002. The 2003 hole measured 1.04 × 107 mi2 in diameter, while the diameter of the 2002 hole was 6.9 ×
A student (m=63 kg) falls freely from rest and strikes the ground. during the collision with the ground, he comes to rest in a time of .101 s. The average force exerted on him by the ground is +1800
A small object rests on the bottoms of the cistern and at its center. how far from the right edge of the cistern can a girl whose eyes are 1.2 from the ground stand and still seee the object?
A 1M solution of Cu(NO3)2 is placed in a beaker with a strip of Cu metal. A 1 M solution of SnSO4 is placed in a second beaker with a strip of Sn metal. A salt bridge connects the two beakers, and w
A Federation starship ( 1.80×10^6 kg) uses its tractor beam to pull a shuttlecraft ( 2.10×10^4 kg) aboard from a distance of 15.0 km away. The tractor beam exerts a constant force of 4.0
A 200 block on a 54.0 -long string swings in a circle on a horizontal, frictionless table at 95.0. What is the speed of the block?
What is the volume of concentrated sulfuric acid needed to prepare a 500 mL solution of 2.0 N sulfuric acid (H 2SO 4).The information written on the concentrated sulfuric acid bottle are as fo
How far apart are two rocks on the moon that can be resolved by a telescope on the earth, whose diameter is 6 m, if the wavelength of the light is 540 nm?
A 135.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 30.0 deg with the horizontal. Find the magnitude of the applied force F.
What is the elastic potential energy of the drawn bow? The arrow has a mass of 0.0300 kg. How fast is it traveling when it leaves the bow?
There are two level or horizontal areas on the graph. what do these areas represent? At what two temperatures do you expect them to occur?
A traffic light is supported by two wires, which make an angle of 80.° to each other. If the maximum tension in each wire is 750 N, what is the maximum weight of the light they can support?
An organic compound had the following analysis: C=55.8% and H=7.03%. A 1.500g sample was vaporized collected over water and found to occupy 0.500L at 100C and 764 mmHg. (vapor pressure is at 100C is
A cannonball launched with an initial velocity of 141 m/s at and angle of 30° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it
A bullet is fired vertically into a 2.00 block of wood at rest directly above it. If the bullet has a mass of 28.0 and a speed of 390, how high will the block rise after the bullet becomes embedded
At what angle must you point the jet ski if your velocity relative to the ground is to be perpendicular to the shore of the river?
What is the hybridization and geometry of the carbonyl carbon in carboxylic acids and their derivatives? 11) A) sp3, trigonal planar B) sp2, trigonal planar C) sp3, tetrahedral D) sp2, tetrahedral E
A long wire lying along the x-axis carries a current of 1.00 A in the +x direction. There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, (where i, j, k are the unit vector
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Marianne puts her favorite Backstreets Boys disc in her CD player. If it spins with a frequency of1800 revolutions per minute, what is the period of spin of the compact disc?
A proton in a uniform electric field of 3.0 X 105 N/C is moving with an initial speed of 800,000 m/s in the direction direction opposite the direction of the field.
An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melt
A car of mass M = 1200 kg traveling at 55.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What
Two identical positive charges separated by 12.5 cm exert a repulsive force of 1.24 N on each other what is the magnitude of the charges?
Snow begins to fall vertically and fills the car at a rate of 3.50 kg per minute. Ignoring friction with the tracks, what is the speed of the car after 86.4 minutes?"