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A person walks first at a constant speed of 4.80 m/s along a straight line from point to point and then back along the line from to at a constant speed of 2.75 m/s. What is her average velocity over
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1330 Hz. What is the speed of the bird
A positive charge Q1 = 3.00 µC is in the origin and a negative charge Q2 = -5.00 µC is at point x = 11m. where the electric potential equals zero
A wave crest passes an observation point followed by a second crest. how long are the wavelengths
Suppose a single electron orbits about a nucleus containing two protons (+2e), find the magnitude of the electron's centripetal acceleration
Two 4.0-g spheres are suspended by 9.0-cm-long light strings. determine the electric field intensity that enables the spheres to be in equilibrium at ? = 12°
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. how much thermal energy is created
A 22 child slides down a 2.4 -high playground slide. She starts from rest, and her speed at the bottom is 1.9 What is the change in thermal energy of the seat of her pants
Sound enters the ear, travels through the auditory canal, and reaches the eardrum. What is the fundamental frequency of the canal
An interstate highway has been built through a neighborhood in a city. In the afternoon, What is the average late-night sound level
An airplane increases its speed from 100 m/s to 160 m/s, How much time does it take for the complete increase in speed
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average speed
The entrance to a large lecture room consists of two side-by-side doors, one hinged on the left and the other hinged on the right. What is the diffraction angle of the sound under each of the followi
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. What is the change in entropy of the boiling water
Charge Q = 10E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge. Which point is at the higher potential
A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°. How long was the ball in th
A spring with an unstrained length of 0.069 m and a spring constant of 2.7 N/m hangs vertically downward from the ceiling. What is the magnitude of the external electric field
Suppose that a plane is flying due west with an airspeed of 222 km/h. What is the magnitude of the wind velocity
A black, totally absorbing piece of cardboard of area A = 3.0 cm2 intercepts light with an intensity of 3.9 W/m2, What radiation pressure is produced on the cardboard by the light
You are driving just behind a second car and both of you are moving at a speed 58mi/h. What is the minimum safe distance
Object A is metallic and electrically neutral. It is charged by induction so that it acquires a charge of -2.86E-6 C. Calculate the difference in mass between the charged objects
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat, how many conduction electrons pass through your chest
A mass of 0.5 kg is suspended from a spring, which stretches by 8 cm. At what frequehcy would you expect resonant behavior
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, find the damping parameter due to the viscous medium
Consider the driven, damped harmonic oscillaror discussed in Section 13-8. Calculate the power dissipated by the damping force