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A converging lens (f = 13.0 cm) is held 7.30 cm in front of a newspaper, the print size of which has a height of 1.90 mm. Find (a) the image distance (in cm) and (b) the height (in mm) of the magni
Two ants race across a table 76 cm long. One travels at 4.6 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one?
The total electric flux from a cubical box 28cm on a side is 1.45*10^3 Nm^2/C. What charge is enclosed by the box?
One student dilutes 10 mL stock solution to a final volume of 20 mL. S/he dilutes 10 mL stock solution to a final volume of 40 mL. S/he dilutes 10 mL stock solution to a final volume of 60 mL. Does
A car is traveling at 24 m/s when the driver spots a large pothole in the road a distance 35 m ahead. She immediately applies her brakes. If her acceleration is -4.3 m/s2, does she manage to stop b
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval should the gyroscope be operated?
Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 92.23% abundance), X-29 (28.976 amu, 4.67% abundance), and X-30 (29.974 amu, 3.10% abundance). Calculate the atomic we
An airplane flying horizontally 3600 ft above the ground at 120mi/hh, drops relief aid on the ground. Determine the angle between the vertical and the line joining the plane and the target at the i
When the tablet dissolves in water, it "fizzes" as the bicarbonate reacts with the citric acid and the vitamin C. What mass of the NaHCO3 reacts with the vitamin C?
A flat circular mirror of radius 0.190 m is lying on the floor. Centered above the mirror, at a height of 0.770 m, is a light source. Calculate the diameter of the bright circular spot formed on th
You find a compound composed only of element "X" and hydrogen, and know that it is 79.89% element X by mass. Each molecule has 3.00 times as many H atoms as X atoms. What is element X?
A dog trots 3.6 meters east and 5.0 meters north. What are the magnitude and direction of the dog's displacement with respect to the original position?
An 8.50 point mass and a 13.0 point mass are held in place 50.0 apart. A particle of mass is released from a point between the two masses 20.0 from the 8.50 mass along the line connecting the two f
A racing car travels in a circular track of radius 250 m. lf the car moves with a constant linear speed of 45.0 m/s;find (a) its angular speed and (b) the magnitude and direction of its acceleration.
how many liters of air containing 21% (v/v) O2 are required at STP to completely react (combust) 1.00 L of liquid MTBE?
A 96.0 N grocery cart is pushed 10.9 m along an aisle by a shopper who exerts a constant horizontal force of 36.2 N. The acceleration of gravity is 9.81 m/s2. If all frictional forces are neglected
The specific gravity of mercury is 13.63. What would be the mass of a sample of mercury that occupies a volume of 4.75mL?
How many revolutions per second would it have to rotate in order that the acceleration of the outer edge of the disk be 17 g's.
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 256 to 297 oC? (The factor
The increase in pressure in the blood vessel is transmitted to the cerebrospinal fuid. What should be the normal effect on the height of the fluid in the spinal tap?
A potter's wheel having a radius 0.45 m and a moment of inertia 10.7 kg·m2 is rotating freely at 50 rev/min. The potter can stop the wheel in 5.0 s by pressing a wet rag against the rim and
An explorer is caught in a whiteout while returning to base camp.He was supposed to travel due north for 5.6km, but he actually traveled 7.8km at 50 degrees north due east.
A metal stand specifies a maximum load of 450 lb. Will it support an aquarium that weighs 59.5 lb and is filled with 37.9 L of seawater (d = 1.03 g/mL)?
To not slip, both cars need to maintain a net force of as they travel around the curve. How does the speed of the small car compare to the speed of the large car as they round the curve?
A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is mus= 0.320, and the coefficient of kinetic friction is muk= 0.190. The angle of elevatio