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An ocean liner leaves New York City and travels 16.1 ° north of east for 233 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the shi
A 60.0 kg crate rests on a level floor at a shipping dock. the coefficients of static and kinetic friction are 0.760 and 0.410, respectively. what horizontal pushing force is required to (a) just s
A pulley system has an efficiency of 87.5% how much of the rope must be pulled in if a force of 648N is needed to lift a 150kg desk 2.46m?
A 0.25 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 24° with the horizontal. Determine the speed of the stone.
A car traveling in a straight line has a velocity of 5.67 m/s at some instant. After 7.37 s, its velocity is 8.04 m/s. What is its average acceleration in this time interval?
A recent ordinance was passed to reduce the allowed sound intensity level of the much despised leaf blowers from their current level of 95 dB to 70.0 dB. Under the new law what is the ratio of the
An oil drop carries one excess electron and weighs 9.3 10-15 N. What electric field strength is required to suspend the drop so it is motionless?
A shopper pushes a cart 50 m south down one aisle and then turns 90.0° west and moves 28 m. He then makes another 90.0° turn and moves 11 m. (a) What is the largest possible displacement of
100 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 950 grams and initial temperature 23° C (the heat capacity of alumin
A thin uniform rod (length = 1.2 m, mass = 2.0 kg) is pivoted about a horizontal, frictionless pin through one end of the rod. (The moment of inertia of the rod about this axis is ML 2/3.) The rod
What is the direction of the displacement that will return the explorer to his hut? Express your answer using two significant figures.
A registered pulmonary function technologist is performing lung testing on a patient. The patient inhales 1.5 L from the spirometer. What will happen to the volume of gas inside the patient's lungs
A 27 pound meteorite struck a car, leaving a dent 26 cm deep in the trunk. If the meteorite struck the car with a speed of 620 m/s, what was the magnitude of its deceleration, assuming it to be con
A nonreflective coating of magnesium fluoride (n = 1.31) covers the glass (n = 1.52) of a camera lens. Assuming that the coating prevents reflection of yellow-green light (wavelength in vacuum = 568
A certain telescope has an objective of focal length 1580 cm. If the Moon is used as an object, a 1.4 cm long image formed by the objective corresponds to what distance, in miles, on the Moon? Assu
A box weighing 470 N is pushed along a horizontal floor at constant velocity by a force of 260 N parallel to the floor. What is the coefficient of kinetic friction between the box and the floor?
A 330-kg piano slides 3.6 m down a 28º incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic frictio
During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 100 km. How much time did it take to go around the Moon once? Give your answer in secon
A gorilla weighs 8.00*(10*10) N and swings from vine to vine. as the forilla grabs a new bine, both vines make an angle of 30 degrees with the vertical, sin such a condition of static equilibrium,
A world-class sprinter accelerates to his maximum speed in 3.8 s. He then maintains this speed for the remainder of a 100-m race, finishing with a total time of 10.3 s. What is the runner's average
A hot (70^{circ}C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g.^{circ}C. John drops the metal into a 500-g calorimeter containing 75 g of water at 20^{circ}C. The calorimete
Write the number 2,500,000 light-years in scientific notation. Write the equivalent number of miles in scientific notation. Please show workings.
What apparent free-fall acceleration is experienced by the managers remaining at the rim? Assume that the average mass for each inhabitant is 65.0 kg.
What is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 3.84 0.10 m?
An airplane (mass=12,000 kg) is catapulted off an aircraft. what is the average net force on the airplane when it starts from rest and reaches a speed of 50 m/s in 70m?