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A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the initial speed of the ball, What is the initial angle of the ball with res
What is the theoretical slope at 30°C What is , the electromotive efficiency to three significant figures. What is the pH of an unknown that gives a reading of 46.7 mV with this electrode at 30&
Some atomic properties depend on the average value of 1/r rather than the average value of r itself. Evaluate the expectation value of 1/r for a hydrogenic helium 1s orbital.
A cruise ship sails 150 km east, then 250 km northwest, and then 100 km at 30° east of south, Find the magnitude and the direction of the last leg of the journey
There are two ways of utilizing hydrogen as fuel in automobiles - as the replacement of gasoline in internal combustion engine or in a fuel cell. Can you explain why a fuel cell is more efficient us
The velocity of an object undergoing linear drag and no other forces can be described as: v(t)=v0e^t/?, Calculate the position x(t), and acceleration a(t) of the particle as a function of time t
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54?
A horizontal magnetic field of 1.0 x 10-4 T is at an angle of 30o to the direction of the current in a straight wire 75 cm long. If the wire carries a current of 15 A
One mole of a ideal gas initially at temp To=0C undergoes an expansion at a constant pressure of 1atm to four times it original volume
An object is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2
A 7.89-kg fish swimming 4.23 m/s swallows an absent-minded 5.16-kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch
Consider a game of billiards. The cue ball has an initial speed v0 before it strikes the eight ball which was previously at rest, Find the nal speeds of both the cue ball and the eight ball, assuming
A child throws a ball with an initial speed of 8:00m/s at an angle of 40 degrees above the horizontal, what is the magnitude of the ball's velocity just before it hits the ground
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 23 to 61 dB
A 175-g object is attached to a spring that has a force constant of 72.5 N/m, Find the locations of the object when its velocity is one-third of the maximum speed
A flight controller determines that an airplane is 30.0mi south of him, Half an hour later the same plane is 30.0mi north west of him, What is the magnitude of its velocity during this time
Two identical spheres are made of conducting material. Initially, sphere 1 has a net charge of 33Q and sphere 2 has a net charge of -18 Q
Two point charges are fixed to rectangular coordinate system, Charges of q1 = 3.5uC and q2 = -15 uChave coordinates (0.55,0) and (0,0) in meters respectively
0.16mol of argon gas is admitted to an evacuated 40cm3 container at 10 ?C. The gas then undergoes an isochoric heating to a temperature of 500 ?C
Three point charges are fixed to rectangular coordinate system, Calculate the magnitude and direction of the net electrostatic force on the charge on the x-axis
A uniform electric field exists in the region between two oppositely charged parallel plates 1.67cm apart, Find the speed of the proton at the moment it strikes the negatively charged plate
A cube of side 8.50cm is placed in a uniform field E=7.50×103 N/C with edges parallel to the field lines, What is the net flux through the cube, What is the flux through the right face
A copper ball with a radius of 1.5cm is heated until its diameter has increased by 0.17mm .Assuming an initial temperature of 21?C
propes a mechanism that shows why P-chlorotoluene reacts with sodium amide in liquid NH3 At -33C to give a 1:1 mixture of P-toluidine and m-toluidine
An objects average density, p, is defined as the ration of its mass to its volume: p = M/V. The Earth's mass is 5.94x10^24 kg and its volume is 1.08x10^12 km^3