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In a proton accelerator a moving proton hits a solid target and stops. As a result an electron-positron pair is created at rest. The proton mass is 1.76E-27kg and the electron and positron have the
If he started at an angle of 20 degrees what is maximum velocity of his motion and where does it occur?
A compound of iodine and cesium contains 63.05 g of metal and 67.75 g of nonmetal. How many grams of cesium are in 32.56 g of compound? How many grams of iodine?
What mass in grams of nitric acid is required to react with 454g of C7H8 and what mass in grams TNT can be made from 829g of C7H8?
An automobile tire is pumped up to a gauge pressure of 2.0 x 10^5 Pa when the temperature is 27 °C. What is its gauge pressure after the car has been running on a hot day so that the tire temper
How much a 6M Na2CO3 stock solution do you need to make 100 ml of a 10% Na2CO3 working solution? Describe how you would make the same solution given a bottle of anhydrous soduim carbonate (MW=105.9
The solution is weakly conducting compared with a solution of of the same concentration.Which of the following substances could the unknown be: KOH,NH3,HNO3,KClO2,H3PO3,CH3COCH3 (acetone)?
A motorist driving a 1000-kg car wishes to increase her speed from 20 m/s to 30 m/s in 5 s. Determine the horsepower required to accomplish this increase. Neglect friction.
A 0.15g sample of pure ZnCl2*xH2O was placed on an ion exchange column in the H+ form. The H+ released in the eluate required 16.98mL of 0.1024M NaOH to reach a phenolphtalein end point.
Lead-206 has a relative abundance of 23.6%. What sized block of lead (in cubic centimeters) will contain 8.34x10^21 atoms of lead-206? The density of lead is 11.35 is g/cm3.
A bullet is fired through a board, 14.0 cm thick, with its line of motion perpindicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is th
The efficiency of a particular car engine is 27% when the engine does 8.7 kJ of work per cycle. Assume the process is reversible. What are (a) the energy the engine gains per cycle as heat Qgain fro
A charge of -2.205μC is located at (3.055m, 4.501m) and a charge of 1.800 μC is located at (-2.533m, 0). a) Find the electric potential at the origin.
If the kinetic energy of a neutron, confined inside a cubic box, is 10 MeV in its ground state, calculate the size of the box. What are the energies of the next three excited states?
A car decelerates uniformly and comes to a stop after 10 s. The car's average velocity during deceleration was 50 km/h. What was the car's deceleration while slowing down?
One mole of an ideal gas at 298K first doubles its volume during isothermal expansion and then returns to its original volume through isothermal compression. What is the entropy change of the syste
Derive expressions for the electric-field magnitude in terms of the distance r from the center for the regions r < a, a < r < b, b < r < c, r > c.
A 11.7 kg piece of metal at 94.9 C is placed in 481 g of water at 26.1 C in an insulated container. The metal and water come to the same temperature at 36.1 C.
Displacement 1 is in the yz plane 58.0° from the positive direction of the y axis, has a positive z component, and has a magnitude of 4.50 m. Displacement 2 is in the xz plane 30° from the p
Two of the capacitors are in parallel, and this parallel combination is in series with the third capacitor. This capacitor combination is connected across a 30-V battery. Find the charge on each cap
A positive point charge Q = 3.7×10^-5 C is fixed at the origin of coordinates, and a negative charge Q' = -4.1×10^-6 C is fixed to the axis at +3 m. Find the location of the place(s) alo
A sample of lead has a mass of 40.00 kg and a density of 1.130 x10^4 kg/m3 at 0°C. (Assume the average linear expansion coefficient for lead is 2.900 x10^-5(°C-1).) (a) What is the density o
If 500 J of work are required to carry a charged particle between two points with a potential difference of 20 V, the magnitude of the charge on the particle is:
Now the incline has a coefficient of kinetic friction "μk". If the block, attached to the spring, is observed to stop just as it reaches the spring's equilibrium position, what is the coefficient
An alpha particle (charge+2e, mass 6.63X10^-27 kg) and a proton (charge +e, mass 1.67X10^-27 kg) are separated by 3 micrometers. What is their potential energy? What is the potential midway?