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An electron with a speed of 3.5 105 m/s enters a uniform magnetic field of magnitude 0.021 T at an angle of 35° to the magnetic field lines. The electron will follow a helical path. (a) Determi
An electric field varies in space according to this equation E(x) = a x e^-bx, where a = 1.353 N(Cm)^-1 and b = 0.847 m^-1.
A block slides down a frictionless plane having an inclination of θ=15.0 degree.The block starts from rest at the top, and the length of the incline is 2.00 m . (a) Draw a free-body diagram of
Make a sketch of a position versus time graph,the velocity versus time graph and the acceleration versus time graph. Describe in words what parts of the graph is showing. write the equation that de
In a circus act, an 18kg dog is trained to jump onto a 3.0 kg skateboard moving with a velocity of 0.14 m/s. At what velocity does the dog jump onto the skateboard if afterward the velocity of the d
In the Bohr model of the hydrogen atom, a single electron revolves around a single proton in a circle of radius R
What is the minimum coefficient of static friction required between the contestants and the ice (assume that it is the same for both contestants)?
If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance?
An elevator has a mass of 4500 kg and carrying a maximum load of 1800 kg . if the cab is moving upward with a full load at 3.8 m/s. The power required of the force moving the cab to maintain that sp
A particle with a charge of 15 experiences a force of 2.3×10-4 when it moves at right angles to a magnetic field with a speed of 28 m/s.
If we connect an ammeter in series with the light bulb, how would the brightness of the light bulb be affected? How about connecting it in parallel with the light bulb?
Write an expression for the power that a real battery with internal resistance r will deliver to a load resistance in terms of ε, r and the load resistance R.
If the miles per gallon of the car is increased, does the amount of heat released to the atmosphere increase, decrease, or stay the same?
Consider a refracting telescope. If it has an objective lens with fobj = 2.9 m and an eyepiece with feyepiece = 5.6 cm, what is the angular magnification of the telescope?
Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force . The magnitude of the tension in the string between blocks B and C
An electron and a proton are located at positions x = 0.10 and -0.10 nm respectively, on the x-axis. (a) Find the electric dipole moment of this system. (b) Find the magnitude and direction of the e
What was the direction of the average force applied to the passenger by the seatbelt?
A 3 way light bulb can produce 50 W, 100 W, or 150 W, at 120 V. Such a bulb contains two filaments that can be connected to the 120 V individually or in parallel. What must be the resistance of each
Find the energy transformed from mechanical to internal in the particle-hoop-floor system as a result of friction in one revolution.
Protons in a linear accelerator are accelerated through a potential difference of 400,000 volts. what is the velocity of the protons after being accelerated? If the protons are accelerated between t
Every second 300 photons are incident normally on each square meter of a 3.0 cm thick absorber. Each of these photons has only 75% of the energy needed to create an electron-positron pair. The absor
A horizontal pipe has an interior diameter that varies. Each section of the pipe has a vertical tube sticking out of it. As a fluid flows through the horizontal pipe vertical fluid columns appear in
If the piston's amplitude is 4.92 cm, find the maximum frequency at which it can move without dislodging the brick.
A special effects creator wants to generate an interference pattern on a screen 7.0m away from a single slit. She uses 645nm light and hopes to get the second dark fringe exactly 52cm from the middl
If the ball is in contact with the wall for 0.0112 s, what is the average acceleration of the ball while it is in contact with the wall?