Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
What is the amplitude of the motion of the air molecules if the speed of sound in the air is 344 m/s and the density of air is 1.28 kg/m3?
a dolphin in 25 degree C sea water emits a sound directed toward the bottom of the ocean 320 meters below. how much time passes before it hears an echo? the speed of sound in sea water is 1530 m/s
The net electric flux through each face of a die has magnitude in units 10^3 Nm^2/C equal to the number N of spots on the face. The flux is inward for N odd and outward for N even. What is the net c
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?