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Question1
The distance between an object and its image is fixed at 40.0 cm. A converging lens of focal length f = 6.53 cm forms a sharp image for two positions of the lens. What is distance a between these two positions?
Question2
According to measurements made in 1910, a common flea can jump 0.330 m. assume that the flea's original speed is 2.20 m/s, find the angle with respect to the ground at which the flea leaps. (Hint: Use the trigonometric identity sin θ cos θ = 1/2 sin 2θ
A converging (lens f=+12cm) in contact with a diverging lens gives a combined focal length of +36 cm, calculate the focal length of the diverging lens
You are practicing throwing darts in your dorm. You stand 2.89 m from the wall on which the board hangs. Calculate the speed of the dart when it hits the board
A hollow ball with mass 0.50kg and radius 10cm rolls down a 3.0m high ramp without sliding.What is the maximum hight that the ball reaches?
trumpet creates a sound intensity level of 1.23 x 10^2 dB at a distance of 0.80 m. What is the sound intensity of a trumpet
Two objects each have a positive charge. The total charge on both objects is 390 µC. When the objects are placed a distance of 1.20 m apart, each exerts an electrostatic force of 21.3 N on the other. What is the charge on each object? (Round the a..
A 500-g mass hangs from a 45.0-cm-long string that is fixed at the top. The mass is pulled slightly aside and allowed to swing back and forth as a pendulum. What is the frequency (in Hz) of the pendulum
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
Some people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated.
When a potential difference of 168 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 23.0 nC/cm2. What is the spacing between the plates
A uniform electric field of about 100 V/m pointing straight down, exists just above Earth's surface. what uniform surface charge density would be required
Compute the Force of Friction (Ff) for a 5kg aluminium block being pulled with constant velocity (uniform motion), up the steel plank that is at a 30degrees angle to the horizontal.
A pinhole camera takes a picture of a building 200 m tall. how far is the camera from the building
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