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A proton, with mass 1.67 x 10-27 kilogram and charge +1.6 x 10-19 C, is sent with velocity 7.1 x 104 meter per second in the +x direction into a region where there is a uniform electric field of magnitude 730 V/m in the +y direction. Suppose that the magnetic field has no x-component and neglect gravitational effects. Obtain the magnitude and direction of the uniform magnetic field in the region, if the proton is to pass through undeflected?
A block with mass m = 2.00 kg is placed against a spring on a frictionless incline with angle ? = 34°. (The block is not attached to the spring). What is the change in the gravitational potential energy of the block-Earth system
a point charge q1 4.60 nc is located at the x-axis at x 2.00 m and a second point charge q2 -4.50 nc is on the
a 15.0 tank contains 0.209 of helium at 23.0. the molar mass of helium is 4.00 .how many moles of helium are in the
In an experiment, 300 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 54.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum-water system
Consider a cell that has a magnetic bead attached to it. We will treat the cell as a Kelvin body. Suppose that the magnetic field has been turned on for a very long time and is producing a constant force Fo.
The position of a squirrel running in a park is given by : r=[(00.280 m/s)t+(0.0360 m/s^2)t^2]i+(0.0190 m/s^3)t^3j. At 4.20 , how far is the squirrel from its initial position
A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 230keV. What was the energy of the photon
A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 8.24 m long and has a radius of 0.402 cm. How much has the cable stretched
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
Illustrate what is its average acceleration during a stop from that velocity? Express your answer in m/s2. Consider the car's initial velocity to be a positive quantity.
An idiot following a fire truck northbound up the side of the highway is going 70 mph while the fire truck is going 60 mph. What is the frequency heard by the idiot
Machmer Hall is 400 m North and 180 m West of Witless. Astudent is late for her appointment in Machmer and wants to runthere directly from Witless. What is the distance from Witless to Machmer
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