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Q1. Photons of energy 4.20 eV bombard the surface, which emits photoelectrons with kinetic energy from 0 to 1.9 eV. What is the threshold frequency for this surface?
Q2. A person walks 25.0° north of east for 2.70 km. How far would the person walk due north and due east to arrive at the similar location?
Illustrate a basketball momentum vectors
Consider a rotational axis at point where the tire contacts the ground, directed vertical to the plane of the paper. Find out the magnitude of the man's force for both designs.
Find (a) magnitude and (b) direction of A - B. (Give the direction as a positive angle with respect to due east). Find out the (c) magnitude and (d) direction of B - A. (Give the direction as a positive angle with respect to due west).
A block of ice at 0 degrees C, whose mass is initially 30.0 kg, slides along a horizontal surface, starting at a speed of 5.56 m/s and finally coming to rest after travelling 21.8 m. figure out the mass of ice melted (in grams) as a result of frictio..
What happens to support force on the workmens feet
Find out the magnetic field strength
What is magnitude of the runner total displacement
What is the potential energy of the elevator
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
A 260 wooden raft floats on a lake. When an 80 man stands on the raft, it sinks 5.0 deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of vibration.
What horizontal force is needed to hold bag in new position
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