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A 60 kg crate is lowered using arope over a fixed support. The rope exerts a constant upward forceof 500 N.? How fast is the crate traveling when it hits the floor
How could you be certain a peak in the soda was caffeine and not another substance with similar retention time
A spring with an unstrained length of 0.073 m and a spring constant of 2.2 N/m hangs vertically downward from the ceiling. What is the magnitude of the external electric field
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. calculate the change in entropy of the boiling water
Describe what data you need to collect and how you will use it to identify the metal cations present in the sparklers.
If you are designing a lander for Venus in the shape of a hemisphere 2.6m in diameter, how many newtons of inward force must it be prepared to withstand due to the Venusian atmosphere
Consider the following. You identify a line with a wavelength of 503 nm. Describe how you would go about determining which of the lines in table 1 of the experiment guide that it corresponds to.
at 400K and a total pressure of 1.0atm, the mole fraction of H2 is 0.25 and that of I2 is 0.30, in equilibrium with HI. Calculate Kp and Kc for the equilibrium.
chromium crystalizes forming body center cubic unit cell length 280 pm. What is the radius of chromium atom in pm
a 20.0 mL sample of NaIO3 was treated with an acess of KI and HCl and the iodine produced titrated with 0.05125 M Na2S2O3. If 19.35 mL, of Na2S2O3 solution were required to reach a strach-iodine end
A U-shaped tube open to the air at both ends contains some mercury. Calculate the vertical distance h from the top of the mercury in the right-hand arm of the tube to the top of the water in the left
A charge of -4.26 micro-Coulombs is fixed at the center of a compass. find direction of the net electrostatic force acting on the charge
A hiker starts at his camp and moves the following distances while exploring his surroundings: 80.0 m north, 2.20 102 m east, Find his resultant displacement from camp
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit
A person walks first at constant speed of 5.00 m/s along a straight line from point a to point band, What is her average speed over the entire trip
In 2004 baseball player Adam Dunn hit the longest home run ever hit in Great American Ballpark in Cincinnati. What was the maximum height achieved by the baseball
At a certain point in a horizontal pipeline, the water's speed is 4.00{\rm m/s}, Find the gauge pressure at a second point in the line
You and a friend are sitting out on the balcony of your apartment which is 24 m above the ground. Where does your friend's ball land
Suppose the river is flowing east at 3 m/s and the boat is traveling south at 4 m/s with respect to the river, Find the speed and direction of the boat relative to Earth
A small mailbag is released from a helicopter that is descending steadily at 1.75 m/s. After 5.00 s, what is the speed of the mailbag
In a game of basketball, a forward makes a bounce pass to the center. What horizontal distance does the ball cover before bouncing
A mountain climber jumps a 2.4 -wide crevasse by leaping horizontally with a speed of 7.2. find the height difference between the two sides of the crevasse
Baseball and the Washington Monument On August 25, 1894, What was the ball's direction of motion when caught? answer in degree
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. Find the length of time the car is in the air
A golf ball is struck with a five iron on level ground. It lands 92.7 away 4.10 later. find the magnitude of the initial velocity