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An electron is accelerated through a potential difference of 1.8 kV and directed into a region between two parallel plates separated by 20 mm with a potential difference of 160 V between them. The electron is moving perpendicular to the electric field of the plates when it enters the region between the plates. What magnetic field is necessary perpendicular to both the electron path and the electric field so that the electron travels in a straight line?
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 3.50 cm into the river. What is the weight of the truck
A service station charges a battery using a current of 6.7 A. for 3.0 hr. How much charge passes through the battery
A curved plate of mass M is placed on the horizontal, frictionless plane as shown. How high the puck will shoot up from the plate
A 41-kg box is thrown at a speed of 220 m/s & is brought to a halt in a collision that lasts for a time of 6.5 m/s. Find the magnitude of the average net force that acts on the box during the collision.
A certain animal species is equally likely to have blue eyes or brown eyes. What is the entropy of this sample
A 0.255 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.200 kg puck that is initially moving along the x axis with a velocity of 2.06 m/s. After the collision, the 0.200 kg puck has the speed of 1.02 m/s at an ang..
An electron with a speed of 6.00 × 10^5 m/s enters a uniform magnetic field of 0.0600 T at an angle of 61.4° to the magnetic field lines. Find the radius of the helical path
A person with nearsightedness was prescribed with contact lenses of power -2.0 D. What is the range of object distances that this person can see clearly with the wrong lenses
An arrow is fired horizontally with a speed of 68. m/s directly at the bulls eye of a target 50 m away. When fired, the arrow is 120-m above the ground. How far short of the target does it strike the ground.
A single circular loop of radius 0.53 m carries a current of 3.2 A in a magnetic field of 0.95 T. What is the maximum torque exerted on this loop
The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. For comparison, determine the weight of a jetliner whose mass is 4.30 × 105 kg
An 81 kg boat that is 9 m in length is initially 7.8 m from the pier. A 20 kg child stands at the end of the boat closest to the pier. How far is the child from the pier when she reaches the far end of the boat
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