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Consider a hammer with a 1.2-kg head. Let it strike the head of a 12-g iron-alloy nail 16 times in a row, quickly. Each time, the hammer head strikes with a speed of 6.5 m/s and is brought to rest. Assuming the nail absorbs all of the hammer head's energy, estimate the temperature rise (in degrees Celsius) of the iron nail. The specific heat of the iron alloy is 450 J/(kg-C).
A model rocket blasts off and moves upward with an acceleration of 15m/s^2 until it reaches a height of 35m, what is the total duration of the rocket's flight
a park ranger wanted to measure the height of a tall tree. The ranger stood 9.50 m from the base of the tree, What is the height of the tree
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 1.0 km2 = 1000000 m2, what is the capacitance?
A Carnot engine extracts 950J from a 600K reservoir during each cycle and rejects 480J to a cooler reservoir. It operates at 22 cycles per second. Find the work done during each cycle
Calculate the electrostatic force exerted on the point charge by the cylinder and what level of uncertainty would be acceptable in the initial position? You may assume that the uncertainty in all other parameters is negligible
Light has a wavelength of 299.3 nm and a frequency of 7.403 × 1014 Hz when traveling through a certain substance. What is the refraction index of this medium
A 55-kg swimmer is standing on a stationary 210-kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.6 meter per second relative to the shore. Calculate the recoil velocity that the raft would have if there were ..
A bullet is fired through a board, 18.0 cm thick, with its line of motion perpendicular to the face of the board. find the bullet's acceleration as it passes through the board
A spring-loaded pellet gun is designed to fire 3.50 g projectiles horizontally at a speed of 39.1 m/s. What maximum force is required to load the gun
A 4.7 kg block moving at 4.7 m/s makes a head-on elastic collision with a stationary block of mass 3.9 kg. Find the kinetic energy of the system after the collision
A small ball with a mass of 49.0g and a charge of ?0.170?C is suspended from the ceiling by a string. What is the tension in the string when the second ball is directly beneath the first ball
The length of a moving spaceship is 29.4 m according to an astronaut on the spaceship. compute the speed of the spaceship
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