The Heisenberg uncertainty principle places restriction on the precision of simultaneously measuring both position and momentum. This principle can also be applied to the simultaneous measurement of two other variables, which are

a. force and color.
b. energy and time interval.
c. mass and charge.
d. torque and frequency.


b

Physics & Space Science

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Collisions in Two Dimensions: A car (of mass 1500 kg) and a small truck (of mass 2000 kg) collide suddenly at right angles at an icy intersection. The car was originally traveling eastward at 20.0 m/s and the truck was traveling northward at 20.0 m/s just before the collision took place. What is the speed of the combined wreck just after the collision if the vehicles become enmeshed?

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Equilibrium: A 3.00-m-long ladder, weighing 200 N, leans against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.00 m away from the wall. The ladder is not completely uniform, so its center of gravity is 1.20 m from its base. What force of friction must the floor exert on the base of the ladder to prevent the ladder from sliding down?

A. 93.3 N B. 130 N C. 28.3 N D. 102 N E. 150 N

Physics & Space Science

A force F = bx3 acts in the x direction, where the value of b is 3.7 N/m3. How much work is done by this force in moving an object from x = 0.00 m to x = 2.6 m?

A) 42 J B) 13 J C) 50 J D) 57 J

Physics & Space Science

You want to insert an aluminum rod, which at 20°C has a radius of 1.00020 cm into a copper tube which has a radius of 1.00010 cm at the same temperature

You decide to put both of them in the refrigerator. At what temperature will the rod just fit if both are cooled to the same temperature? The coefficient of thermal expansion for aluminum is 2.4 × 10-5K-1, and that of copper is 1.7 × 10-5K-1. A) 7.8°C B) 6.3°C C) 9.2°C D) 14.7°C E) 5.7°C

Physics & Space Science