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Determine the height of the hill above the valley floor. Treat the positive direction as to the right. Solve symbolically if there had been enough info given to to determine the initial velocity of
A vertical glass tube of length L= 1.28 m is half filled with a liquid at 20 C. How much will the heigh of the liquid column change when the tube and liquid are heated to 30 C? Use coefficients a gl
It is estimated that in the United States (population 250 million) there is one electric clock per person, with each clock using energy at a rate of 3.5 W. Using this estimate, how much energy is co
Dangerous dan, a scottish bricklayer, throws a brick as hard as he can, at 100 m/s srraight up in the air. What is the maximum height of the brick?
The gravitational force of attraction between two students sitting at their desks in physics class is 3.02 multiplied by 10-8 N. If one student has a mass of 49.2 kg and the other student has a mass
A tourist is being chased by an angry bear is running in a straight line towards his car at a speed of 4.0 m/s. The car is a distance d away. The bear is 26 m behind the thourist and running at 6.0
A ball is shot from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = (6.8 i + 6.9 j) m/s, with i horizontal and j upward. What total horizontal distance does the bal
A cylindrical resistor of length L = 2 cm is constructed from an inner cylindrical core of radius R1 = 3.0 mm, made from material of resistivity r1 = 1.5 ohm-cm and an outer shell, which has an inne
A long straight but hollow wire carries a current I uniformly distributed throughout its area (excluding the hollow). The inner radius of the wire is ri while the outer radius is ro. Find the magnit
An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatic force on the first electron just great enough to cancel the gravi
The top particle lies along the positive y-axis and has a charge of +3 C while the other two particles lie along the positive and negative x-axis and each have a charge -4 C. A. What is the electric
If a sample of gold, with a mass of 38.68 g, is pressed into a leaf of 2.100 µm thickness, what is the area of the leaf?
Two point charges lie along the y-axis. A charge of q1 = -7 µC is at y = 6.0 m, and a charge of q2 = -5.5 µC is at y = -4.0 m. Locate the point (other than infinity) at which the total
A charge of -3.35 nC and a charge of -6.40 nC are separated by a distance of 80.0 cm. Find the position at which a third charge of +7.60 nC can be placed so that the net electrostatic force on it is
The combined mass is shot horizontally off the cliff. With what speed does the mass hit the ground at the bottom of the cliff?
To get off a frozen, frictionless lake, a 71.0 kg person takes off a 0.170 kg shoe and throws it horizontally, directly away from the shore with a speed of 2.00 m/s. If the person is 5.20 m from th
When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10 cm that has a coeffici
If a heater supplies 1.8 x 106 J/h to a room 3.5 m x 4.6 m x 3.0 m containing air at 20 ºC and 1 atm, by how much will the temperature rise in one hour, assuming no losses of heat or air mass t
An electron is moving in free space with a velocity equal to 105 m/s and is aiming at a stationary electron far away , How close can this electron get to the stationary electron before repulsive for
Determine its maximum angular displacement. (For large v, and/or small l, the small angle approximation may not be good enough here.)
Acording to a rule of thumb, every 5 secondes between a lighting flash and a following thunder, gives the distance to the flashind miles. Assuming that the flash of light arrives in essentially no t
The bullet passes through the block and emerges with its speed reduced to 180 m/s. The block slides a distance of 44.0 cm along the surface from its initial position. a) What is the coefficient of k
A pinball machine launches a 153 g ball with a spring-driven plunger. The game board is inclined at 9 degrees above the horizontal.
Calculate the work done in time t by the forces of constraint acting on the particle and on the wedge. What are the constants of motion for the system?
Determine the amount of mass that the submarine must take on if it is to descend at a constant speed of 1.00 m/s, when the resistive force on it is 1097 N in the upward direction. The density of sea