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a tennis ball is hit vertically upwards with a velocity of 20m/s.find the time taken for the ball to reach its highest point
1. Using the Weiszacker’s formula, calculate the binding energy per nucleon for 235
92 U and
its two fission products: 149
60 Nd and 86
32Ge.
8 A pencil 10 cm long is placed 70 cm in front of a lens of focal length +50 cm. The image is ________
A. 4 cm long and upright
B. 4 cm lang and inverted
C. 25 cm long and upright
D. 25 cm long and inverted
9. The lens of the eye forms an image on the relina that is _______
A. Real and upright
B. Real and inverted
C. Virtual and upright
D. Virtual and inverted
10. Joy is farsighted. She cannot clearly see objects closer than 60 cm. Determine the lens power (reading glasses) which will help her read a magazine at a distance of 25 cm. Assume the lens is very close to the eye.
A. +2:33 D
B. -2.33 D.
C. +5.55 D
D. -5.55 D
3. All real images of a concave mirror are ________
A . Inverted
B. Smaller than the object
C. Behind the minor
D. All of the above
4. The image of an object in front of a convex miror is ________
A. Reduced
B. Also in front of the mirror
C. Inverted
D. Enlarged
5. A penicil 10 cm long is placed 30 cm in front of a mirror of focal length -50 cm. The image is _________
A. 25 cm long and upright
B. 6.3 cm long and upright
C. 25 cm long and inverted
D. 6.3 cm long and inverted
6. An object closer to a converging lens than its focal point always has an image that in ________
A. Inerted
B. Virtual
C. The same in size
D. smaller in size
7. An object is located 10 cm from a converging lens of focal length 12 cm. The image distance is ______
A. +5.5 cm
B. - 5.5cm
C. +60 om
D. -60 cm
A torque of 7.4 N • m is applied to a wheel with a moment of inertia of 0.092 kg . cm?
. What is the resulting
angular acceleration?
What torque is required to give a disk of mass 6.1 kg and radius 0.50 m an angular acceleration of 17 rad /s2
Directions: Solve the problems below and use the rubric as your guide in answering Use a separate sheet of paper for your solution.
Focus on the Eye. The comea of the eye has a radius of curvature of approximately 0.50 cm, and the aqueous humor behind it has an index of refraction of 1.35. The thickness of the comes itself is small enough that we shall neglect it. The depth of a typical human eye is around 25 mm.
(a) What should be the radius of curvature of the cornea so that it could focus the image of a distant mountain on the retina located at the back of the eye opposite the comea?
(b) If the cornea focused the mountain correctly on the retina as described in part (a), will it also focus the text from a computer screen on the retina if the screen was placed 25 cm in front of the eye? If not, where will it focus the text, in front of or behind the retina?
Is the equation v = v0 + ax dimensionally correct?
You are required to Design 1- series circuit according to your own choice using electronic simulator.
For this, you can use any freely available simulator like Circuit Maker, Dip Trace, or Proteus.
In case of large telescope objectives, the central position of the objective is covered with a stop so as to____
