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In which string will the pulse move faster? How much additional time will the slower pulse require reaching the end of its string?
A piece of silver weighs 89.5 N in the air, 78.5N in the water and 85.6N in an unknown liquid. Find the densities of the metal and of the unknown liquid.
Transverse pulses travel with a speed of 200 m/s along a taut copper wire whose diameter is 1.50 mm. What is the tension in the wire? (The density of copper is 8.92 g/cm3.)
(a) What value of absolute zero in degrees Celsius does the calibration yield? What pressures would be found at (b)the freezing and (c) the boiling points of water? Hint: Use the linear relationship
Write a problem containing at least three forces of different magnitudes and directions which results in a constant acceleration. The problem should also require resolving forces into their componen
A rocket-powered sled starts from rest on a frozen lake that is 8 miles across. The sled then accelerates at +20 ft/s for 2 minutes. Then, the rockets are shut off and the sled coasts with a constan
A block slips on a greased surface with an initial velocity v0. It experiences a drag force equal to F = -cv3/2 (for positive velocity v). Find the velocity and position as a function of time if at
Suppose the plates for each key have an area of 47.5 mm^2 and an initial separation of 0.550 mm. In addition, let the dielectric have a dielectric constant 3.75. If the circuitry of the computer can
To move a large crate across a rough floor, you push on it with a force F at an angle of 21°, below the horizontal. Find the acceleration of the crate, given that the mass of the crate is m = 31
Water flows through a horizontal pipe of cross-sectional area 10 sq. cm. At one section the cross-sectional area is reduced to 5 sq. cm. The pressure difference between the two sections is 300 Pa. H
Push a heavy piece of furniture. Experiment to find the most efficient method. a. At what part of the object did you apply the force? Explain the underlying principles.
a) A 2kg block rests on a 30 degree incline; determine the coefficient of static friction required to keep the block still.
A pilot wants to fly due north a distance of 125km. the wind is blowing out of the west as a constant 35km/h. If the plane can travel at 175km/h, how long will the trip take?
Neglecting air resistance, use Newton's second law to find the rock's position as a function of time in the horizontal and vertical Cartesian coordinates.
The initial acceleration of the first particle is observed to be 5.7 m/s2 and that of the second to be 12 m/s2. If the mass of the first particle is 8.5 x 10-7 kg, what are (a) the mass of the second
In the rocket frame in which the meter stick is at rest, the meter stick is not contracted, while in this frame the hole in the plate IS contracted. Therefore, there must be a collision between the
The initial temperature of the water and calorimeter is 16°C, and the final temperature after equilibrium is established is 38° C.
When thermal equilibrium is attained, the temperature of the water is 54°C. Determine the specific heat of the block.
When the ball hits the wall, the horizontal component of its velocity is reversed; the vertical component remains unchanged. (Ignore any effects due to air resistance.)
A rescue boat with speed 21.0 km/hr (with respect to the water) sets off from the dock at the optimum angle to reach the child as fast as possible. How far from the dock does the boat reach the chil
100 g of ice at 0 degrees C and 100 g of steam at 100 degrees C interact thermally in a well-insulated container. What is the final state of the system?
27 g of copper pellets are removed from a 300 degrees C oven and immediately dropped into 90 mL of water at 22 degrees C in an insulated cup. What will the new water temperature be?
a) If a mass of 2kg is attached to a string of length 1m and pulled back to the angle shown (30 degrees from straight down), what velocity will the mass have at the "bottom" of its swing?
Demonstrate proper notation and use of units by converting the pressure rating written on a tire of 35 lb/in^2 to kilopascalas. Use the following 1N=.2248 lb; in=2.54cm.
The hose lies horizontally on the ground, and a stream of water sprays vertically out of a small leak to a height of 0.80 . aWhat is the pressure inside the hose?