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The maximum tension the wire can withstand without breaking is 500 N. A 0.800 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed this projectile
A biochemist studying the breakdown in soil of the in secticide DDT finds that it decomposes by a first-order reaction with a half-lifeof 12 yr. How long does it take DDT in a soil sample to decompo
Enzymes in human liver catalyze a large number of reactions that degrade ingested toxic chemicals. By what factor is the rate of adetoxification reaction changed if a liver enzyme lowers the activat
A 60g tennis ball with an initial speed of 25 m/s hits a wall and rebounds with the same speed. The figure shows the force of the wall on the ball during the collision. What is the value of F(max),
Two skaters are in the exact center of a circular frozen pond. skater 1 pushes skater 2 off with a force of 100 N for 1.74 seconds. Skater 1 has a mass of 44 kg and skater 2 has a mass of 88 kg. We
A 150.0-g sample of a metal at 75.0C is added to 150.0-g ofH20 at 15.0C. The temperature of the waterrises to 18.3C. Calculate the specific heat capacity of the metal,assuming that all the heat lost
A child pulls a wagon with a foce of 36 N by a handle making an angle of 26 degrees with the horizontal. If the wagon has a mass of 5.2 kg, to the nearest hundredth of a m/s^2 what is the accelerati
A car travels at a constant speed around a circular track whose radius is 2.6 km. The car goes once around the track in 300 s. What is the magnitude of the centripetal acceleration of the car?
A major league picter can throw a baseball in excess of 41.0m/s. If a ball is throw horially at this speed,how much will it drop by the time it reach a catcher who is 17.0m away from the poin of rel
Lemon juice has a pH of about 2.5. Assuming that the acidity of lemon juice is due solely to citric acid, that citric acid is a monoprotic acid, and that the density of lemon juice is1.0 g
What should the phase delay be so that signals coming from an angle 16.0 ° with the vertical (in the plane formed by the vertical and the line joining the antennas) will add constructively at th
An Olympic skier moving at 20.0 m/s down a 30.0 degree slope encounters a region of wet snow, of coefficient of friction μk=0.740. How far down the slope does she go before stopping?
The partial pressure of oxygen in air at sea level is 0.21 atm. Calculate the molar concentration of oxygen in a lake saturated with air at 20 degrees celsius and an atmospheric pressure of 660 torr
A 100 kg box is placed on a ramp. As one end of the ramp is raised, the box begins to move downward just as the angle of inclination reaches 15 degrees. What is the coefficient of static friction be
A block of mass 5.00 kg rests on a horizontal surface where the coefficient of kinetic friction between the two is 0.200. A string attached to the block is pulled horizontally, resulting in a 2.00 m
Argon crystallizes in the face-centered cubic (fcc) arrangement at40 K. Given that the atomic radius of argon is 191 pm, calculate the density of solid argon.
If the two-block system accelerates at 0.5 m/s2, what is the tension in the second string attached to the 8 kg mass?
Vanadium crystallizes in a body-centered cubic lattice (the V atoms occupy only the lattice points). How many V atoms are present in a unit cell?
Two blocks, joined by a string, have masses of 6.0 and 9.0 kg. They rest on a frictionless horizontal surface. A 2nd string, attached only to the 9 kg block, has horizontal force = 30 N applied to i
A barefoot field-goal kicker imparts a speed of 30 m/s to a football at rest. If the football has a mass of 0.50 kg and time of contact with the football is 0.025 s, what is the force exerted on the
Rita accelerates a 0.40 kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick?
A 2 000 kg sailboat experiences and eastward force of 3 000 N by the ocean tide and a wind force against its sails with magnitude of 6 000 N directed toward the northwest (45 degrees N of W). What i
Determine the average reaction rate between 600 and 1200seconds. Also determine the instantaneous rates at 600 secand 1800 sec.
A crate of weight W is being pushed across a horizontal surface by a force directed at an angle of 20 degrees below the horizontal. What is the magnitude of the normal force on the crate?
A plane is moving due north, directly towards its destination. Its airspeed is 200 mph. A constant breeze is blowing from west to east at 30 mph. At what rate is the plane moving north? (please show