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Given that the flea has a mass of 0.55 , and that two legs are used in a jump, estimate the maximum height a flea can attain by using the energy stored in the resilin. (Assume the resilin to be an i
A thin circular disk of charge density (sigma) and radius a rotates with angular velocity (omega) about an axis through its center in the plane of the disk. Describe the radiation field using the m
What is the direction of the net electric field at point = 0.190 on the y-axis?What is the magnitude of the net electric field at point = 0.584 on the y-axis?
A person who weighs 600 N steps onto a spring scale in the bathroom, and the spring compresses by 0.94 cm. What is the spring constant?
A ball with a 7.5 mass is attached to a 3.8 meter string. It is swung around in a circle one revolution is 2.7s. what is its speed ? what is it's centripetal acceleration?
A bullet of mass 5.00 g is fired horizontally into a wooden block of mass 1.26 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.160. The bullet
What is (a) the width and (b) the height of the central bright maximum of the diffraction pattern, measured between the two dark fringes on either side?
The coefficient of static friction between his hands and the book is 0.34. To keep the book from falling, what is the magnitude of the minimum pressing force that each hand must exert?
A 47.0 g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a height of 24.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest poin
Two charges, -Q and -4Q are a distance L apart. These two charges are free to move but do not because there is a third charge nearby. What must be the magnitude and distance of the third charge and
Is angular momentum of the block conserved? Why or why not? (b) What is the new angular speed? (c) Find the change in kinetic energy of the block. (d) How much work was done in pulling the cord?
A wire is formed into a circle having a diameter of 10.0 cm and placed in a uniform magnetic field of 3.00 mT. The wire carries a current of 5.00 A. Find (a) the maximum torque on the wire and (b) t
A mass-spring system oscillates with an amplitude of 4.10 cm. If the spring constant is 225 N/m and the mass is 574 g, determine the mechanical energy of the system.
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.0 rad/s^2 for 7.0 s and is then brought to rest with a constant angular acceleration of -4.7 rad/s^2.
The electron beam will go through the center of the circle. To complete the design your job is to calculate the electric field in the center of the circle as a function of the amount of positive cha
Now place a thin film of dielectric material of refractive index 1.46. By how much will this change the optical path between the slit and the centre of the screen?
How high above the ground is the highest point that the skateboarder reaches? When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
If 20.0 kcal of heat are supplied to 5.00 102 g of water at 23° C, what is the final temperature of the water?
To keep a room at a comfortable 21.0°C a Carnot heat pump does 415 J of work and supplies it with 3470 J of heat. What is the temperature of the outside air?
A freezer is comprised of 1.8x1.0x0.5 m^3 volume, insulated with 5 cm thick Styrofoam. (a) At what rate must the compressor remove heat to maintain the inside at - 20 degrees Celsius with the outsid
A horizontal force of 197 N pushes a 14 kg block up a frictionless incline that makes an angle of 65° with the horizontal.
A 25 kg chimpanzee hangs from the end of a horizontal, broken branch of length L0 = 1.6 m, as shown in the figure . The branch is a uniform cylinder 4.5 cm in diameter, and the end of the branch sup
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 53.0° above the horizontal and has a magnitude of 6.80 106 N. Find the magnitude and direction of the rockets acce
A projectile is fired straight upward at 141 m/s. How fast is it moving at the instant it reaches the tip of its trajectory? Suppose instead that it were fired upward at 45 degrees. What would be i
How does the magnitude of electrical force between a pair of charged particles change when they are brought to half their original distance of separation?