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The thermal expansion coefficient of copper is about 1.7 x 10-5 / oC. A copper cable has a length of 20 m early in the morning, when the temperature is 15 oC. What is the change in it's length (Lnew-L
Find the magnetic field at the center of a set of Helmholtz coils each with radius R=0.1m and each carrying a total current I=1.1A (so if there are N turns, each turn carries current I/N).
The electric field in an electromagnetic wave is given by the following (using the standard units) E=20cos(10^7x-wt) where x is the position along the x-axis.
Is it possible for both the pressure and volume of a monatomic ideal gas to change without causing the internal energy of the gas to change?
A healthy heart pumps about 70 ml of blood in one heart beat. The average pressure exerted is about 100 mm-Hg and there are 70 heartbeats in a minute. (a) What is the average power output of the hea
A wheel, starting from rest, has a constant angular acceleration of 1.2 rad/s^2 . In a 1.8-s interval, it turns through an angle of 75. How long has the wheel been in motion at the start of this
A 255-g mass hangs from the other end of the string and is released. Find the acceleration of the cart and the hanging mass.
Find the force acting on the electron as it revolves in a circular orbit of radius 5.18x 10-11 m.
What are the two smallest nonzero film thicknesses (in nm) for which reflected light undergoes constructive interference? Let (a) be the smaller of the two values.
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, the horizontal total force on the driver has magnitude118N. What is the total horizontal forc
A space station, in the form of a wheel 121 m in diameter, rotates to provide an "artificial gravity" of 2.70m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the
A 10 kg block of ice has a temperature of -8°C. The pressure is one atmosphere. The block absorbs 4.20 106 J of heat. What is the final temperature of the liquid water?
Light shines through a single slit whose width is 7.40 10-4 m. A diffraction pattern is formed on a flat screen located 3.2 m away. The distance between the middle of the central bright fringe and t
An aluminum baseball bat has a length of 0.81 m at a temperature of 20°C. When the temperature of the bat is raised, the bat lengthens by 0.00016 m. Determine the final temperature of the bat.
A series RLC circuit contains a 125.0 O resistor, a 35.0 µF capacitor and a 70.0 mH inductor. The circuit is attached to a 60 Hz oscillator with a peak voltage of 55.0 V. What is the peak vo
A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 665 nm. Determine the angle that locates the first dark fringe when the width of the slit is each
A transparent oil with index of refraction 1.29 spills on the surface of water (index of refraction 1.33). Determine the thickness of the oil slick.
An unknown number of moles of an ideal monoatomic gas expand reversibly from Vi = 2.50 m3 to Vf = 3.20 m3, at a constant pressure of 2.11 atm. Find the final temperature of the gas K.
A proton beam in an accelerator carries a current of 115 µA. If the beam is incident on a target, how many protons strike the target in a period of 26.0 s?
A heat engine operates as a reversible Carnot cycle transfers 6.0 kW of heat from a reservoir at 1000 K and then rejects it to the atmosphere at 300 K. Calculate the thermal efficiency of the engi
As a high-power laser engineer you need to focus a 1.17-mm diameter laser beam to a10.3-µm diameter spot20.6cm behind the lens. What focal length lens would you use?
Two converging lenses with focal lengths 2cm and 12cm, respectively, are placed 30 cm apart. An object of height= 5 cm is placed15cm to the left of the 2-cm lens. What will be the position and heigh
A model train moves along a horizontal circular track with a radius of 0.5 m. Starting from rest, the train accelerates at 0.2 m/s2. What is the angular acceleration (in rad/s2) of the train?
The top of the hill can be approximated by an arc length of a circle with a radius of 370 m. What is the weight (in N) of the car at the top of the hill?
A 5 cm by 5 cm square loop of wire is rotating at 30 rpm in a uniform magnetic field of strength 3.0T. The direction of the field is perpendicular to the axis of rotation of the loop. What is the em