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With the pendulum swinging back and forth, where is the tension equal to zero?
The first-order bright fringe is a distance of 4.84mm from the center of the central bright fringe. For what wavelength of light will the first-order dark fringe be observed at this same point on the
a 3.50 x 10^2 N child is in a swing that is attached to ropes 1.75 m long. find the gravitational potential energy associated with the child relative to her lowest postion when a) the ropes are hori
A 50.0 g copper calorimeter contains 250 g of water at 20.0°C. How much steam must be condensed into the water if the final temperature of the system is to reach 45.0°C?
How much energy is delivered to the target each second if the protons each have a kinetic energy of 30 MeV and lose all of their energy in the target?
A 4.84 kg block slides down a smooth, frictionless plane having an inclination of 30? . The acceleration of gravity is 9.8 m/s2 . Find the acceleration of the block.
A car crashes into a wall at 30 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 75 kg test dummy by the seat belt.
When the water turns to ice during the night, heat is released into the plants, thereby giving them a measure of protection against the falling temperature. Suppose a grower sprays 7.64 kg of water
A constant force of 37.5 N, directed at 32.9° from horizontal, pulls a mass of 14.7 kg horizontally a distance of 2.61 m. Calculate the work done by the force.
Eight lights are connected in parallel to a 123 V source by two leads of total resistance 2.6. If 240 mA flows through each bulb, what is the resistance of each? What fraction of the total power is
The second has mass m2 = 5.1kg and speed v2 = 2.87 m/s. The angle between the velocity vectors v1 and v2 is 43. What is the speed of v3 of the thrid fragment?
A 230-N child is in a swing that is attached to ropes 1.90 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
A cannonball shot with an initial velocity of 140 m/s at an angle of 45° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is the cann
A particle with a charge of q = -5.00 nC is moving in a uniform magnetic field of vec{B}=( -1.28 T ) hat{z}. Calculate the x component of the velocity of the particle.
A rock is thrown directly upward from the edge of the roof of a building that is 54.9 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds af
A 5.80 g lead bullet traveling at 460 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is
A 11 kg crate is placed on a horizontal conveyor belt. the materials are such that static friction = 0.47 and kinetic friction = 0.24. Draw a free-body diagram showing all the forces on the crate if
A small but measurable current of 1.2X10^-10 A exists in a copper wire whose diameter is 2.5mm. The number of charge carriers per unit volume is 8.49X10^28 m^-3. Assuming the current is uniform, cal
Determine the radius of the 100th bright ring, assuming 500-nm light is incident normal to the flat surface of the lens.
A cannonball shot with an initial velocity of 142 m/s at an angle of 45° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is the cann
A Carnot engine performs work at the rate of 432 kW while using 637 kcal of heat per second. If the temperature of the heat source is 556°C, at what temperature (in Celsius) is the waste heat e
Calculate the electric field generated by cable A at middle-point between two cables. Calculate the total electric field at middle-point between cables?
A toaster rated at 1005 W operates on a 120 V household circuit and a 4.00 m length of Nichrome wire as its heating element. The operating temperature of this element is 328°C. What is the cross
A rifle bullet with a mass of 11.0 g traveling toward the right at 247 m/s strikes a large bag of sand and penetrates it to a depth of 24.5 cm. Determine the magnitude of the friction force (assumed
Inside the tube is a uniform electric field of 4.50 x 10-4 N/C pointing in the negative y-direction. How far does the particle travel before hitting the tube wall? Neglect any gravitational forces.