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A 83 kg circus performer jumps from a 5.1 m height onto a trampoline and stretches it downward 0.30 m. How far will it stretch if the performer jumps from a height of 8.4 m?
A charge of -2.55 nC and a charge of -5.25 nC are separated by a distance of 40.0 cm. Find the position at which a third charge of +7.90 nC can be placed so that the net electrostatic force on it i
A flat sheet of crystalline quartz has a thickness of 1.6 cm. It is on top of a flat sheet of diamond that has a thickness of 2.1 cm. Light strikes the crystalline quartz perpendicularly and travels
An electron is projected vertically upward with a speed of 1.30 106 m/s into a uniform magnetic field of 0.280 T that is directed horizontally away from the observer. Describe the electron's path in
Take the mass of the sun to be = 1.99×1030 , the gravitational constant to be = 6.67×10-11 , and the acceleration due to gravity at the earth's surface to be = 9.810 . Express your weigh
The temperature of 2.73 kg of water is 34 °C. To cool the water, ice at 0 °C is added to it. The desired final temperature of the water is 11 °C. The latent heat of fusion for water is
A cardinal (Richmondena cardinalis) of mass 3.70×10-2 and a baseball of mass 0.143 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of t
If the Earth's dipole moment were attributed to an electric current circulating in the core at effectively one third radius from the centre, how large would this current be?
When the block has risen a vertical height of 0.825 m, the tension in the cord is 4.60 N. What is the initial velocity of the bullet.
Two conducting spherical shells are concentric, with radii of 0.30 m and 2.20 m. The electric potential of the inner shell, with respect to the outer shell, is +1250 V. what is the maximum electric
A tank having a volume of 0.100 m3 contains helium gas at 155 atm. How many balloons can the tank blow up if each filled balloon is a sphere 0.300 m in diameter at an absolute pressure of 1.30 atm?
Calculate the moment of inertia about an axis through the center and perpendicular to the disk, expressed solely in terms of the total mass M and radius R.
A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round with a mass of 250 {rm kg} is spinning at 20 {rm rpm}. John runs tangent to the merry-go-round at 5.0 {rm
At one point in a pipeline, the water's speed is 3.00m/s and the gauge pressure is 4.00×10^4 Pa. Find the gauge pressure at a second point in the line 11.0m lower than the first if the pipe di
Two pellets, each with charge 3 microcoulomb (1 microcoulomb = 0.000001 coulombs), are located 0.5 m appart. What is the electrical force between the charges?
A horizontal force of 51 N is required to keep it moving with a constant speed. The acceleration of gravity is 9.8 m/s2 . Find the coefficient of static friction between crate and floor.
A charge moves a distance of 1.1 cm in the direction of a uniform electric field having a magnitude of 204 N/C. The electrical potential energy of the charge decreases by 59.6483 × 10-19 J as
A 1.25 kg mass is suspended from a string which is pulled upward. The mass accelerates upwards with an acceleration of 3.50 m/s2. What is the tension in the string?
The mass of the rotor is 0.20 kg, the radii of the cylinder are 0.020 meter and 0.025 meter, and the radius of the shaft is 0.0020 meter. The angular momentum of the shaft and spokes is negligible.
Determine the current in the wire. (b) If the wire is heated to 30.0°C while the 9.0-V potential difference is maintained, what is the resulting current in the wire.
At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods. The length of each rod can be adjusted to be one-quarter of a wavelength of an electromagn
A compact disk (CD) recording system samples each of two stereo signals with a 16-bit analog-to-digital converter. Determine the output signal-to-quantizing ratio for a full-scale sinusoid.
A 23 kg piece of zinc at 71 degrees Celsius is placed in a container of water. The water has a mass of 36 kg and has a temperature of 21 degrees Celsius before the zinc is added. What is the final t
A 5.20 kg block hangs from a spring with spring constant 2100 N/m. The block is pulled down 5.30 cm from the equilibrium position and given an initial velocity of 1.60m/s back toward equilibrium. W
The angle of elevation of the sun is 28'20' degrees and the shadow of a flagpole on horizontal ground is 29.48 cm. How tall is the flagpole?