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Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a magnitude of 6.2 m/s2. Ignore the effects of air resistance. Take the up
During a circus performance, a 65.1-kg human cannonball is shot out of a 17.3-m-long cannon. If the human cannonball spends 1.04 s in the cannon, determine the average net force exerted on him in th
Consider two identical conducting spheres whose surfaces are separated by a small distance. One sphere is given a large net positive charge, and the other is given a small net positive charge.
In the women's competition, the end of a typical launch ramp is directed 63° above the horizontal. With this launch angle, a skier attains a height of 14.9 m above the end of the ramp. What is t
Calculate the enthalpy of formation for butane,C4H10 using the balanced chemical equation and write out the solution according to Hess's law.
A cubical surface surrounds a point charge +q. Describe what happens to the total flux through the surface if (a) the charge is doubled, (b) the volume of the cube is doubled,
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider tobe of importance to healthcare professionals? Why? In which situations are these ch
Calculate the concentrations of the dinitrophenylamines in the solutions used for the spectrophotometry infinityreading. If you know the path length of the curvette you used, calculate the molar abs
Explain why the reaction of 2,4-dinitrochlorobenzene with piperidine or morpholine is second order, even though there are three reactant molecules in the overall equation for the reaction.
50.0mL of a solution with calcium oxalate required 1.76mL of 0.00101M premanganate to titrate it. What is the Ksp value for calcium oxalate?
A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.810 m/s at an angle of 33.0° above the table, and it lands on the magazine 0.077
How would the reading on a barometer change if you were to take one on a trip from los angeles to Lake Tahoe, which is at a much higher altitude?
Why was the dichloromethane layer washed with sodium bicarbonatein the procedure for the preparation of camphor?
A volleyball is spiked so that it has an initial velocity of 16.5 m/s directed downward at an angle of 50.5 ° below the horizontal. What is the horizontal component of the ball's velocity when t
Two 2.1 kg physical science textbooks on a bookshelf are 0.27 m apart. What is the magnitude of the gravitational attraction between the books?
What would be the effect on the calculated molarity of the NaOH solution if the tip of the buret were not filled before the titration? In other words, air was in the tip of the buret.
The highest barrier that a projectile can clear is 10.9 m, when the projectile is launched at an angle of 31.0 ° above the horizontal. What is the projectile's launch speed?
When 54.6 g calcium and 32.1 g nitrogen gas undergo a reaction that has a yield of 94.0%, what mass of calcium nitride forms?
A major-league pitcher can throw a ball in excess of 39.6 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the poin
A 5.58 g sample ofaluminum pellets (specific heat capacity = 0.89 J°C-1 g-1) and a 10.00 gsample of iron pellets (specific heat capacity = 0.45 J°C-1g-1) are heated to100.0°C. The mix
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.75 cm apart. An electric force accelerates each electron in the beam from rest to 9.50% of the speed
Calculate the cell potential, the equilibrium constant, and the free energy change for: Ba(s) + Mn2+(aq)(1M)=bA2+(aq)(1M)+Mn(s) given the following E values:Ba2+ +2e=Ba(s) E=-290V and Mn2+(aq)+2e=Mn
You are designing a small coil (called a search coil) to measure magnetic fields. It is to have a diameter of 4.00 and is to be designed so that flipping it 180in a field of 0.180 causes a maximum t
What would be the value of the activation energy for a reaction whose rate doubles when the temperature is increased from 25-35 degrees C?