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A long, straight wire carrying a current of I experiences a magnetic field of B to the left and at one instant, an electron, a distance d (mm) from the wire travels at a velocity v(m/s) parallel to the wire and in the same direction as the current.
A) Find the direction and magnitude of magnetic force. Where I=3.0A, B= 7T, d=4.5cm and v=1.0x 10 4 m/s.
An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used.
By measuring the spectrum of wavelengths of light from our sun, we know that its surface temperature is 5820 K. calculate the diameter of our sun
A 12.0-kg block rests on a horizontal table and is attached to one end of a massless, horizontal spring. By pulling horizontally on the other end of the spring, someone causes the block to accelerate uniformly and reach a speed of 3.99 m/s in 1.02..
Light of wavelength 700 nm is incident on the face of a fused quartz prism (n = 1.458 at 700 nm) at an incidence angle of 72.4°. Calculate the angle of refraction at the first surface
four identical metal spheres have charges of qa -8.0 microc qb-2.0 microc qc5.0 microc and qd12.0 microc.a two of the
A rifle that shoots bullets at 470 m/sis to be aimed at a target 41.6 maway. If the center of the target is level with the rifle, how highabove the target must the rifle barrel be pointed so that the bullet hits dead center?
q1. a 78.9 kg man steps off a platform 4.57 m above the ground. he keeps his legs straight as he falls but at the
A certain toaster has a heating element made of Nichrome resistancewire. When the toaster is first connected to a 110 V source of potential difference (and the wire isat a temperature of 20.0°C), the initial current is1.7 A
A 1100-kg car pulls a boat on a trailer. What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2 ? The mass of the boat plus trailer is 700 kg.
An automobile engine slows down from 4260 rpm to 1080 rpm in 2.99 s. Calculate the total number of revolutions the engine makes in this time. Do not enter unit
stronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.13 Earth years in its circular orbit around its sun, Find the radius of the exoplanet\'s orbit
Pluto spins about its axis with a period of approximately 6.39 Earth days. What is the rotational angular speed of Pluto
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