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A fortune teller's "crystal ball" (actually just glass) is 13 cm in diameter. Her secret ring is placed 8 cm from the edge of the ball.
a) An image of the ring appears on the opposite side of the crystal ball. How far is the image from the center of the ball?
b) The crystal ball is removed and a thin lens is placed where the center of the ball had been. If the image is still in the same position, what is the focal length of the lens?
A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity.
After a golf ball is hit it takes off with an initial speed of 26.2 m/s and at an angle of 39.5° with respect to the horizontal. The golf field is flat and horizontal.
You are at a rock concert, and the sound intensity reaches levels as high as 120 dB. Calculate the amplitude of this oscillating force
When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.10 x 10^3 J. By how much does the potential energy of a(n) 20 kg child increase when the child climbs a norma..
A 6.70 -uC particle moves through a region of space where an electric field of magnitude 1300 N/C points in the positive x direction, find the components of the particle's velocity
the position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t], velocity and acceleration of the cart
A horizontal force of magnitude 46.1 N pushes a block of mass 3.64 kg across a floor where the coefficient of kinetic friction is 0.554. find the increase in the kinetic energy of the block
A rectangular trough, 1.9m long, 0.50m wide, and 0.30m deep, is completely full of water. at what speed does water emerge from the hole
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. what is the mass of the helium
Two pencils have the same average density (500 kg/m^3). The mass of the mechanical pencil is twice the mass of the conventional pencil. Which accelerates at the greater rate
A 14.1-g bullet is accelerated from rest to a speed of 793 m/s in a rifle barrel of length 66.9 cm. (a) Find the kinetic energy of the bullet as it bullet as it leaves the barrel.
An aircraft takes off at 203 km/h after accelerating from rest at 2.14 m/s2. What is the minimum runway length required
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