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A rate law and activation energy. Describe the chemistry that was occurring in the experiment between the time when solution A and B were mixed.
A 5 kg steel ball strikes a wall with a speed of 10.7 m/s at an angle of 59° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.151 s,
A 63 kg boy and a 47 kg girl use an elastic rope while engaged in a tug-of-war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the acceleration of
Historically, the solid residue that is left after the methylene chloride solution is evaporated has a lower melting point that its literature value, due to impurities. Explain what impurities are
A girl on a sled coasts down a hill. Her speed is 7.6 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.040,
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, what would be the recoil speed of the thorium nucleus?
What is the equilibrium partial pressure of SO3 in the mixture? At 900 K the following reaction has Kp=0.345:
Which electron transition requires the greatest amount of energy to be absorbed by a hydrogen atom n=1 to n=2 or n=3 to n=9 shouldnt it be n=3 to n=9 as it involves more shells.
(a) what is velocity of the two objects after collision? (b) How much kinetic energy is transferred to object B during the collision?
It has been suggested that rotating cylinders about 8mi long and 6.1mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripital accel
10 mL of 18 M sulfuric acid are added to 200 grams of water. A modest exothermic process occurs causing the temperature of the water to increase by 5.2°C. What is the molar enthalpy for the proc
How much work can be performed by an ideal Carnot heat engine that is driven by heat released upon condensation of 30 L of water vapor at 373 K and P = 1 bar?
How long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
When a 5.00-g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 6.225 kJ·K-1, the temperature decreases by 0.200 K.
Two point charges of 30x10^-9C and -40x10^-9C are held fixed on an x axis at the origin and x=40cm respectively. A particle having mass 2x10^-6kg with a charge of 50x10^-6C is released from rest at(
A 1.206 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.870 grams of Kl and 50
What is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?
what is the number of degree s of freedom of the system to determine the number of contributions from each cylinder to get the desired composition?
A house at the bottom of a hill is fed by a full tank of water = 6.5 deep and connected to the house by a pipe that is = 130 long at an angle of = 61 from the horizontal. Determine the water gauge
The lab assistant has prepared a 0.309 M solution of Ba(OH)2 and a 0.443M solution of HCl for you. What volume of the HCl solution will be required to exactly neutralize 10.0 mL of the BaCI2 soluti
If the elevator cable breaks when the elevator is at a height above the top of the spring, calculate the value that the spring constant should have so that passengers undergo an acceleration of no m
What are the efffect of wing loading on aircraft performance
It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. Y
A baseball pitcher throws a fastball at a speed of 50 m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 3.6 m. Calculat
A loudspeaker of mass 19.0 kg is suspended a distance of h = 2.40 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 m. What is the tensi