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The allowed energies of a simple atom are 0.0 eV, 5.0 eV and 8.0 eV. An electron traveling at a speed of 1.8×10^6 m/s collisionally excites the atom.
What is the minimum speed the electron could have after the collision?
a dogs hair has been cut and is now getting 1.04 mm longer each day. with winter coming on this rate of hair growth is
What is the rate of energy loss in watts per square meter through a glass window 4.8 mm thick if the outside temperature is -4°F and the inside temperature is +72°F?
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.40 10-11 m. What is EPEfina..
An 85 kg spacewalking astronaut pushes off a 655 kg satellite, exerting a 115N force for the 0.600 s it takes him to straighten his arms.
An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 140m above the level ground when the plane is flying at 80.0m/s 45.0 degrees above the horizontal. How far in front of the catt..
How does reaction time affect emergency situations, like braking in a car? Estimate the distance a car travels at 100km/hr due to your reaction time in braking
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
Resolve the position s_b of the image if an object is placed in air on the axis of the rod 16.00 cm to the left of the end of the rod.
q1. a parallel-plate capacitor has a plate area of 1cm1 and a plate separation of 2.5 mm. to obtain an electric field
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.9 kg · m2. What is the resulting angular speed of the student and the stool
An ion harvester is scouring deep space for isolated xenon (Xe+) ions. A xenon ion is singly ionized and has the charge of +e. If the field meter reads 0.000000202 N/C, how far away is it from the ion.
A 2.50g ice flake is free from the edge of a hemispherical bowl whose radius r is 31 cm. The flake-bowl contact is frictionless. What is the speed of the flake when it reaches the bottom of the bowl?
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