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After flying for 15 min in a wind blowing 42 km/h at an angle of 34° south of east, an airplane pilot is over a town that is 44 km due north of the starting point. What is the speed of the airpl
A car is traveling over a hill. If, using a Cartesian coordinate system with origin O at the top of the hill, the hill;s profile is described by the function y=-(.003m^-1)x^2, where x and y are in m
Suppose that protons are fired towards the large flat side of a charged conducting plate. Initial speed of the protons is v0, and initial distance d. a) What is the minimum speed so that the proton
A mass m1 on a horizontal shelf is attached by a thin string that passes over a frictionless pulley to a 2.5 kg mass (m2) that hangs over the side of the shelf 1.8 m above the ground.
An airplane has a mass of 27,500 kg and takes off under the influence of a constant net force of 41,000 N. What is the net force that acts on the plane's 83 kg pilot?
A steel rod is used to transfer heat from a chamber at 300 K to a chamber at 250 K. Which of the following changes in the setup will result in the greatest increase in the rate of heat transfer?
An electron starts from rest 0.05m from the centre of a uniformly charged sphere of radius 0.03m. If the sphere carries a total charge of 1.00 X 10 minus 9 C (or 1.0 nC), how fast will the electron
At one point in a thermodynamic cycle, one mole of an ideal gas is under 100 Pa of pressure and has a volume of 2 cubic meters. What is the approximate temperature of the gas?
A 1.00 micro F capacitor (C1) is charged by being connected across a 10V battery (and charged to 10 micro C). It is then disconnected from the battery and connected across an uncharged 2.00 micro F
What is the maximum distance by which Helean is behind Laura, and at what time does that occur?
A. 1.6m long string fixed at both ends vibrates at resonant frequencies of 780hz and 1040hz, with no other resonant frequency between those values. What is the fundamental frequency of this string?
A lead ball is dropped into a lake from a diving board 18 ft. above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. If it reaches
The plates of a spherical capacitor have radii 31.0 mm and 32.0 mm. (a) Calculate the capacitance in picofarads. (b) What must be the plate area in square centimeters of a parallel-plate capacitor w
The system is now placed in its initial position and a 1.2 kg mass is placed on top of the block of mass m1. Released from rest, the 2.5 kg mass now strikes the ground 1.3 seconds later.Determine th
A cubic block of quartz glass measures 0.1m on a side. What will be the increase in volume of the block if it is heated from 20 degrees C to 30 degrees C? (Coeffcient of linear expansion for this gl
It is then disconnected from the battery and connected across an uncharged 2.00 micro F capacitor (C2). Determine the resulting charge on each capacitor.
(a) What is the acceleration of each sprinter? (b) What are their respectve maximum speeds? (c) Which sprinter is ahead at 6.00-s mark, and by how much? (d) What is the maximum distance by which Hel
The caps are then disconnected from their batteries and connected to each other, with each negative place connected to the other positive plate. What is the final charge of each capacitor? And what
The speed of sound is 343 m/s. How far from speaker A along the +x axis will a point of constructive interference occur?
You throw a ball upward with an initial speed of 4.4 {\rm m/s}. When it returns to your hand 0.90 {\rm s} later, it has the same speed in the downward direction (assuming air resistance can be igno