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A man lost a maze makes three consecutive displacements so that at the end of his travel he is rigth back where he started. the first displacement is 8.00 m westward and the second is 13.0 m northwa
The filament has a surface area of 0.250 mm^2 and an emissivity of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K).
a .225 kg sample of tin initially at 97.5 degrees celsius is dropped into 0.115 kg of water. The initial temperature of the water is 10.0 degrees celsius. If the specific heat capactiy of tin is 230
A ball weighing 571-N is shown suspended from a system of cords. What are the tensions in the horizontal and angled cords?
The rotational inertia of a collapsing spinning star changes to 1/3 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy (KEnew / KEi)?
What is the smallest amount of time in which the person can accelerate the car from rest to 14 and still keep the coffee cup on the roof?
A 800 g ball moves in a vertical circle on a 1.07 m-long string. If the speed at the top is 5.00 m/s, then the speed at the bottom will be 8.18 m/s. (a) What is the tension in the string when the ba
The potential at location A is 396 V. A positively charged particle is released there from rest and arrives at location B with a speed vB. The potential at location C is 796 V, and when released fro
A 20.0 kg rock slides on a rough horizontal surface at 8m/s and eventually stops due to friction. The coefficient of kinetic friction between the rock and the surface is 0.200. What average thermal
How much work must Denise do to drag her basket of laundry of mass 4 kg a distance of 6 m along a floor, if the force she exerts is 10 N at an angle of 60.0 with the horizontal?
The notes produced by a guitar range in frequency from approximately 80 Hz to 630 Hz. Find the possible range of wavelengths in air produced by the instrument when the speed of sound in air is 343
Show that to first order perturbation theory, if the system starts in the ground state then the system can only make transitions to the first excited state. Compute the transition rate.
Biometric measurements indicate that each hand typically makes up about 1.25 of body weight. a. What horizontal force must her wrist exert on her hand?
A tortoise can run with a speed of 0.10 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shel
A laser beam is sent from the sub so that it strikes the surface of the water at a point 210 m from the shore. If the beam just strikes the top of a building standing directly at the water's edge, f
A point 8.00 m above the point from which it is thrown. Ignore air resistance. Find the magnitude of the initial velocity of the baseball.
Two identical point charges (q = +3.80 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.320 m. A test charge (q0 = -2.10 x 10-8 C), with a mass of 4.40 x 10-8 kg, i
A 4.0 cm tall object is placed 50 cm away from a converging lens of focal length 25 cm. What is the nature and location of the image?
One electron collides elastically with a second electron initially at rest. After the collision, the radii of their trajectories are 1 cm and 2.4 cm. The trajectories are perpendicular to a uniform
The rotational inertia of a collapsing spinning star changes to 1/4 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy?
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance determine the speed of the ball when it is at a height of 0
A camera flashtube requires 8.0 J of energy per flash. The flash duration is 2.0 m/ss}.What power does the flashtube use while it's flashing?
A uniform magnetic field given by B=(0.25T)i+(.30T)k, find a)the torque on the loop(in unit vector notation) and b) the magnetic potential energy of the loop.
What is the energy stored in a small battery if it can move 650 C through a potential difference of 1.00 V?
Find a peer reviewed article which discusses the effects of optimism on physical and psychological health. (You may need to find two articles in order to cover both the physical and the psychologic