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A lightbulb emits a spherical wave. If the intensity of the emitted light is 1.2 W/m2 at a distance of 2.4 m from the bulb, what is the intensity at a distance of 4.9 m?
Firefighters responded to a call to rescue a small kitten stranded on the top superstructure of a bridge. Just as a rescuer was about to make the lifesaving "grab", the kitten panicked and jumped, f
A 55 kg swimmer is standing on a stationary 175 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +3.7 m/s relative to the shore. Find the recoil velocity that th
A 1MeV neutron is scattered through an angle of (45)^0in a collision with a 2H nucleus. (i) What is the energy of the scattered neutron? (ii) What is the energy of the recoiling nucleus?
The stopper is removed. What mass of water flows from the nozzle in 2.00 h? (c) Calculate the gauge pressure of the flowing water in the hose just behind the nozzle.
During this time interval, the magnitude and direction of the velocity of the particle undergo a negligible change, but the particle moves by a distance of 0.150 m in a direction perpendicular to th
A gyroscope contains a cylinder of mass 4kg, radius 1.6cm and length 7.7cm, which is free to rotate about its axis. Calculate the moment of inertia of the cylinder for rotations about its axis
In 550-600 words, outline the different methods that astronomers use to calculate the distances to astronomical objects, from the closest to the farthest.
Now a triply charged ion of mass m' is accelerated through the same potential difference and deflected by the same magnetic field into a semicircle of radius R' = 5R. What is the ratio of the masses
The sled is loaded with physics books, giving a total mass of 39. With what force should you pull with the rope horizontal?
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Suppose the speeds of the two canoes after they are pushed a
If m = 5.41 g, Q = -7.63 µC, and θ = 23.9°, determine the magnitude and the direction of the electric field that enables the block to remain at rest on the incline.
An infinite cylindrical conductor of radius a = 1 cm carries a current I1 = 0.39 A out of the page. A coaxial, infinite, thin cylindrical conducting shell of radius b = 5 cm carries a current I2 =
The coefficient of static friction between the floor and the ladder is μs= 0.45. How far along the ladder can a 60.0 kg person climb before the ladder start to slip?
How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angle) must it now sail to reach its original destination?
An infinite plane is uniformly charged with static electricity and generates an electric field. The field has a strength of 7.50 N/C at a distance of 1.00 m from the plane. (a) What is the strength
Compute the acceleration at the moment the train speed reaches 58.0 km/h. Assume the train continues to slow down at this time at the same rate.
Suppose a 67-kg boy and a 42-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the ac
A 2.5 kg block sliding with a constant velocity of 6.0 m/s on a frictionless horizontal surface approaches a stationary 12.5 kg block.
If the radius of Foosbane is equal to the radius of the Earth, and the acceleration due to gravity at the surface is 5.4 m/s2, what is the period of oscillation of the pebble, in minutes?
A loaded tractor trailer with a total mass of 5000 kg traveling at 3.0 km/h hits a loading dock and comes to a stop in 0.64 s. What is the magnitude of the average force exerted on the truck by the
A 15.0 g rubber bullet hits a wall with a speed of 120 m/s. If the bullet bounces straight back with a speed of 92 m/s, what is the change in momentum of the bullet?
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of the submarine's displacement? (Assume that upward and the direction of the
Find the magnitude of the linear momentum of