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You place 108 moles of hydrogen gas in a balloon of volume 2.3 m3, and find the pressure to be 1.6 times atmospheric pressure. What is the typical speed of a hydrogen molecule?
If a 120g mass was placed at the 25cm mark, and a 20 g mass at the 12 cm mark, where must a 500 g mass be placed to balance the system?
Two polarizers are out of alignment by 24.1°. If light of intensity 1.00 W/m2 and initially polarized halfway between the polarizing angles of the two filters passes through the two filters
A hockey puck with mass 0.160kg is at rest on the horizontal, frictionless surface of a rink. What is the position of the puck at the end of that time
An automobile starter motor has an equivalent resistance of 0.0660 ? and is supplied by a 12.0-V battery with a 0.0170-? internal resistance. What is the current to the motor
A 10 \rm g bullet traveling at 440m/s strikes a 12kg , 1.2-\rm m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, What is the angular velocity of the door just after impact
A horizontal conductor in a power line carries a current of 5500 A from south to north. Find the magnitude and direction of the magnetic force
An ordinary drinking glass is filled to the brim with water (267.5 mL) at 3.0° C and placed on the sunny pool deck for a swimmer to enjoy. how much water will have spilled over the top of the glass
Three dogs are pulling on a blanket in different directions. The English shepherd is pulling north with a force of 40 N. in what direction is the boxer pulling
a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C, determine the final temperature of the system consisting of the ice
A ball is thrown so that its initial vertical and horizontal components of velocity are 60 m/s and 15 m/s, estimate the ball's total time of flight
In a ballistics test, a 23-g bullet travelling horizontally at 1300 m/s goes through a 40.0 cm-thick 450-kg stationary target and emerges with a speed of 900m/s. The target is free to slide on a smooth horizontal surface.
A baseball batter swings the bat and applies a force of 36.38 N to the ball for a time of 0.31 s. what is the impulse on the ball
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