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In proton-beam therapy, a high-energy beam of protons is fired at a tumor. What is the total charge of the protons that must be fired at the tumor
A conductor is suspended by two flexible wires has a mass per unit length of 0.04 kg/m. What is the required direction for the current
A rectangular loop consists of N = 100 closely wrapped turns and dimensions a = 0.4m and b= 0.3m. What is the expected direction of rotation of the loop
Cyclotrons are sometimes used for carbon-dating by accelerating singly ionized C14 and C12 ions from a sample of material. find the difference in cyclotron frequencies for the two ions
An astronomical telescope uses an eyepiece of power +80.000 D. what is the magnification of the telescope
A sinusoidal ac voltage source in a circuit produces a maximum voltage of 12.6V and an rms current of 7.50mA. Find the voltage amplitude
A 3700 ? (ohm) resistor and a 1.2-µF capacitor are connected in series across a generator, Determine the average power delivered to the circuit
A charge of -3.00 nC is placed at the origin of an x-y coordinate system, and a charge of 2.00 nC is placed on the y-axis at y=4.00cm. What are the magnitude and direction of the total force
An apple is placed 13.6 cm in front of a diverging lens with a focal length of magnitude 22.4 cm. What is the magnification of the image of the apple
The positions of three particles, written as (x, y coordinates, are: particle 1 (mass 3.7 kg) at (4 m, 0 m); What is the location of the center of mass
Two ice skaters, with masses of 30.0kg and 75.0kg , are at the center of a 30.0m -diameter circular rink. how long does the lighter skater take to reach the edge
A tennis player swings her 1000 g racket with a speed of 15.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 15.0m/s. compute the average force that the racket exerts on the
A 40.0g ball of clay traveling east at 3.00m/s collides, What is the speed of the resulting ball of clay
A parallel-plate capacitor having square plates 4.50cm on each side and 8.00mm apart is placed in series with an ac source of angular frequency 620rad/s, What is the resonance angular frequency of t
Dan is gliding on his skateboard at 4.00m/s . He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
An RLC series circuit has R=1.35 kOhm, L=225 mH, and C=2.50 uF (micro farads) and is connected across a 60 Hz power supply. find the reactances of the capacitor and inductor
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. find the speed of the lighter box
A 15.0 kg block of ice at 0 degrees C falls into Lake Superior, which is a freshwater lake. What is the change in entropy, delta S, of the lake
If two successive overtones of a vibrating string are 420 Hz and 480 Hz, what is the frequency of the first overtone
A 723-N person stands on a uniform board of weight 282 N and length 6.1 m. How far from the left end of the board is the person standing
The tires of a car make 51 revolutions as the car reduces its speed uniformly from 95km/h to 38km/h. What was the angular acceleration of the tires
Two musicians are comparing their clarinets. The first clarinet produces a tone that is known to be 442Hz, If the second clarinet produces a higher pitched tone than the first clarinet, what is
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
Nichrome wire of cross-sectional radius 0.768 mm is to be used in winding a heating coil. determine the required resistance of the coil
A crate of mass m = 33 kg rides on the bed of a truck attached by a cord to the back of the cab, find the maximum acceleration the truck can have before the cord breaks