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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?"
Sam, whose mass is 61.0 kg, takes off down a 49.0 m high, 9.00^circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 45.0 {rm m/s}. What is the coefficien
A city's water supply is fluoridated by adding NaF.The desired concentration of F- is 1.6ppm.How many milligrams of Naf should be added per gallon of treated water if the water supply is 0.2 ppm in
Two Polaroids are aligned so that the light passing through them is a maximum. At what angle should one of them be placed so that the intensity is subsequently reduced by 50 percent?
What must the charge (sign and magnitude) of a 1.43-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630?
A motorist is traveling at 12 m/s when he sees a deer in the road 43 m ahead. If the maximum negative acceleration of the vehicle is -7 m/s/s, what is the maximum reaction time (delta)t of the moto
An observer is traveling at 0.49 times the speed of sound. What is the observed frequency if the observer moves toward the source?
In an acid-base neutralization reaction between 100.0 mL of 0.5 M nitric acid (HNO3) and 100.0 mL of 0.5 M potassium hydroxide (KOH), qrxn was found to be -5000 J. what is the enthalpy change per mo