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1. A reflecting, spherical Christmas tree ornament has a diameter of 9.0 cm. A child looks at the ornament from a distance of 24 cm.Describe the image she sees. Where is the image located
2. A spherical concave lens has a focal length of 40 cm, and an object is placed 20 cm from the lens. Draw a ray diagram. (Submit a file with a maximum size of 1 MB.) Estimate the image distance.
3. Sketch a ray diagram for a spherical convex lens with an object at Do = 2f. (Submit a file with a maximum size of 1 MB.)
Explain how fast will he be moving backward just after releasing the ball?
A small rock moves in water and the force exerted on it by the water is given by equation . The terminal speed of the rock is measured and found to be 1.9 . The rock is projected upward at the initial speed of 6.4 . You can ignore the buoyancy for..
High-speed stroboscopic photographs show that the head of a 220-g golf club is traveling at 42 m/s, Find the speed of the golf ball just after impact
We drop a 26-g ice cube (0C) into 1000 g of water (20C). Find the total change of entropy of the ice and water when a common temperature has been reached
A barge has a mass of 27,500 kg and is 13.2 meters wide and 31.5 m long. Find the mass of the iron one that the barge is carrying
Is the momentum change identical? If not, the ball would have the larger momentum change throughout the collision with the wall?
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." what is the "hang time"
A "door closer" is attached to the door and the top of the door frame.When the door is open and at rest, the door closer exerts a torque of 4.8 {rm N} cdot {rm m}. What is the least force that you need to apply to the door to hold it open.
A painter is using a ladder to paint the outside of a house. The ladder, which is 8.44 m long and has a mass of 23.7 kg, Calculate the net torque acting on the ladder
Three resistors, 27, 49, and 79 , are connected in series, and a 0.55 A current passes through them. What is the potential difference across the three resistors
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this?
A 21 kg suitcase is being pulled with constant speed by a handle that is at an angle of 30 degrees above the horizontal. What was the mass of the dog food
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