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A plane is flying in the horizontal plane. At time t1 = 0 s with the components of its velocity are vx = 100 m/s and vy = 120 m/s. What was the change in the direction of the velocity
The water level in a vertical glass tube 1.300 m long can be adjusted to any position in the tube. What is the greatest depth of water for which there will be resonance in the air in the tube
A string is stretched between fixed supports separated by 75.0 cm. It is observed to have resonant frequencies of 288.0 and 384.0 Hz, What is the lowest resonant frequency for this string
A long aluminum rod is struck at one end. At the other end an observer close to the rod, hears the sound of the blow twice, What is the length of the rod
Find the speed of the waves on an 800.0 mg violin string 21.7-cm long if the fundamental frequency is 912.0 Hz. find the wavelength of the sound waves emitted by the string
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. Determine the force of tension in the rope support
Blue whales apparently communicate with each other using sound of frequency 17.0, What is the wavelength of such a sound in seawater
A woman at an airport is towing her 15.0-kg suitcase at constant speed by pulling on a strap at an angle ? above the horizontal. What angle does the strap make with the horizontal
Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, Find the time at which Kathy overtakes Stan
A vessel which contains an ice-water mixture at 0C is in thermal contact with a water-steam mixture at 100 C. how many grams of ice melts
A mountain climber wears a goose down jacket 3.3cm thick with total surface area 1.2m^2 . The temperature at the surface of the clothing is -20C and at the skin is 34 C. Determine the rate of heat f
A 36g glass thermometer reads 20.6C before it is placed in 104mL of water. What is the original temperature of the water
Two point charges are located on the axis as follows: charge = -1.80 at = -0.500 , and charge = 2.20 at the origin (= 0). What is the direction of the net force
When a potential difference of 221 V is applied to two plates of a parallel-plate capacitor, the inner surface of the positive plate carries a surface charge density of 40 nC/cm2. What is the spacin
When you touch a friend after walking across a rug on a dry day, you typically draw a spark of about 2 mm. Estimate the potential diference between you and your friend before the spark
Two point charges of magnitude 3.02 nC and ?1.82 nC are separated by 41.4 cm. What is the potential energy of the pair of charges
Pool players often pride themselves on their ability to impart a large speed on a pool ball. At what speed did his pool ball hit the ground
A 0.180kg block of ice is placed against a horizontal, compressed spring mounted on a horizontal tabletop that is 1.40m above the floor. what is the speed of the block of ice when it reaches the floo
A point charge Q is located at the center of a very thin, spherical metal shell. what is the electric potential of the shell
Compare the magnitudes of the gravitational force of attraction and the electric force of attraction between the electron, Find the ratio of the electric force to the gravitational force
A barge is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walking along the tow paths on either side of the canal. What is the net force on the barge
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.8 m/s at ground level. What is its maximum altitude
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 9 m in an evacuated chamber. Find the difference in final speeds of the two spheres
Calculate Earth's average speed relative to the Sun (in m/s). According to my book, the answer is 3.0x10^4 m/s
A 49.0 g ball of copper has a net charge of 1.7 µC. What fraction of the copper's electrons have been removed