(Figure 1) shows an object and its image formed by a thin lens. Assume that L = 17.0 cm and y = 3.25 mm. Part A What is the focal length of the lens? Express your answer in centimeters to three significant figures. AE O Figure 1 of 1 Submit Previous Answers Reavest Answer Image X Incorrect; Try Again; 8 attempts remaining Object Optic Part B axis Lens cm What type of lens is it?
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- Many roller coasters have loops where carts roll on a track that curves sharply up into the air. At the top, the people are upside down (and usually screaming). For safety reasons, many of these roller coasters must have a minimum speed at the top of the loop. In the roller coaster shown, the cart must have a minimum speed of 10.0 m/s at the top of the loop to make it around safely a) Assuming the roller coaster starts from rest at the top of the first hill and there is no friction on the roller coaster, what is the minimum height of the first hill? b) What power must be generated to bring a train of cars with a mass of 4560 kg to the top of the hill in 20.0 s?15. A skier is at the top of a frictionless hill. The hill makes an angle of 30.0° relative to the horizontal. What would be her acceleration down the hill? A. 2.9 m/s² B. 4.9 m/s² C. 3.3 m/s2 D. 3.8 m/s² E. 8.5 m/s²Descending from rest at the last peak (height 20 m above the ground level) on a roller-coaster track, a car, of mass 750 kg, hits at the end of a horizontal stretch of shallow water, which exerts the average braking force of 920 N. How far does the car splash through the water before it stops?a. 210 m b. 160 m c. 130 m d. 90 m e. 50 m
- 2. A baggage handler drops your 10.0 kg suitcase on a conveyor belt running at 2.0 m/s. The materials are such that us = 0.50 and k = 0.30. How far is your suitcase dragged before it is riding smoothly on the belt?A 48.42kg hunter ropes a 167.82 kg sleeping polar bear and pulls the bear towards him until they meet. Originally they are 211.22 m apart on frictionless ice. When the hunter pulls the polar bear to him the hunter will move... a. 52 b. 810 c. 67 d. 1602) Three equal negative charges, Q1=Q2=Q3=-Q are arranged on an equilateral triangle of side a centered at the origin as shown in the figure below. А. Sketch the electric field everywhere in space. В. What electric force (direction and magnitude) does Q3 feel? С. Can you replace Q2 with another charge so that Q3 feels no net force? D. Determine the electric flux through a spherical surface of radius 5a centered at the origin. Е. What is the approximate electric field (magnitude and direction) distance 1000a from the origin?
- 1. Toss a solid object at 22 m/s at a 35° angle from 1.2 m off the ground. (a) How high will it go? (b) Find the time needed to hit the ground. (c) How far will it go? (c) With what speed will it hit the ground?circle. Ezra swings the ball so that it always has constant speed of v = 4.82 m/s. The radius of the swing is r = 0.787 m and Ezra's hand is H = 1.40 m above the ground as shown. y H7. You put a box on a skateboard and give it a quick push with a certain force. It starts to move. After it leaves your hand, it will... * a. Continue at a constant speed forever. O b. Slow down constantly until it stops. c. Speed up constantly forever. d. Speed up for a little while, then go at a constant speed forever. e. Speed up for a little while, go at a constant speed for a while, then slow down to a stop. sheet of oa
- You are on one of those fast roller coasters that is traveling at 30 m/s and it accelerates at 4 m/s? for 4 seconds. How fast will it be going after it accelerates? c. 36 m/s. d. 26 m/s. a. 56 m/s. b. 46 m/s.Will upvote for the correct answer, thank you!The coefficient of friction between a race car's wheels and the track is 1.0. The car starts from rest and accelerates at a constant rate for 275 m. Find the maximum speed at the end of the race.a. 52 m/s b. 57 m/s c. 73 m/s d. 86 m/s