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(a) What is the frequency of waves heard by the insect? (b) Calculate the frequency of the return waves after reflection from the insect (the insect becomes the source of these return waves) and rea
An aluminum wire having a cross-sectional area of 3.00 multiplied by 10-6 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire. The density of aluminum is 2.70 g/cm3. Assu
Find the temperature of the hot filament. Assume an initial temperature of 20.0°C.
Two point particles, one with charge -8 x 10-9 C and the other with charge -2 x 10-9 C, are separated by 0.04 m. The electric field in N/C midway between them is:
What is the pressure in the top floor pipe. Pressures are gauge pressures. Give your answer to the nearest tenth of a kPa.
A 176-lb swimmer has a specific gravity of 1.03. What is the swimmer's effective weight while under water? Give your answer to the nearest tenth of a pound.
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 15.8 N. When completely submerged in water, its apparent weight is 13.5 N. What is the
The y and z dimension of the slab are very large compared o d and may be treated as essentially infinite. The slab has uniform positive charge density p. A) Explain why the electric field due to the
An 78-kg jogger is heading due east at a speed of 2.8 m/s. A 56-kg jogger is heading 42 ° north of east at a speed of 2.6 m/s. Find (a) the magnitude and (b) the direction of the sum of the mome
Consider two identical +76 microcoulomb point charges placed 73 cm apart. Let there be a +1 nC (1 nanocoulomb = 1E-9 coulomb) test charge midway between them. Calculate the work (in J) required to m
A converging lens with focal length of +20cm is located 10 cm to the left of a diverging lens having a focal length of -15cm.
What is the absolute pressure at a point that is 7.70 cm below the ethyl alcohol-mercury interface?
With the equipment provided in labs why do you observe only the Balmer series, but not the Lyman or Paschen series?
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.2 × 10-4m2 and the speed of the water is 0.55 m/s as it leaves the faucet. Ignoring air resistance, f
As a race car approaches a fan in the stands the fan hears the noise of the engine at 323 Hz. As the race car recedes from the fan the frequency that is heared is 278 Hz. Assuming the speed of sound
A simple harmonic oscillator with frequency f= 2 Hz has initial conditions x(0)= 0.76m and v(0)= 0.31 m/s. Calculate the amplitude and phase of the oscillation as well as its maximum velocity and to
A mass on a string of unknown length oscillates as a pendulum with a period of 2.5 s. Parts a to d are independent questions, each referring to the initial situation. What is the period if:
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 6.06 x 10-2 kg/s. The density of the gasoline is 738 kg/m3, and the radius of the fuel line is 2.46x10-3 m. What is the spe
The magnitude and direction on the buoyant force acting on the block is 21.817 N upward.
If electrons are used (in an electron microscope), what minimum kinetic energy is required for the electrons? (Hint: Use relativistic mechanics to solve this part.)
Consider a square conducting pipe. The length L is much larger than the dimension of the cross section, which is a square of size a x a. The walls are insulated from each other.
Assuming this uncertainty in speed prevails for 6.00 s, determine the uncertainty in the duck's position after this time interval.
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 7.9 x 1028 kg and 1.7 x 103 m. (a) Find the density of such a star.
The acceleration record shown was obtained during the speed trials of a sports car. Knowing that the car startys from rest, determine by approximate means (a) the velocity of the car at t = 8s, (b)
What is the resultant linear acceleration of a point on the rim of the disk at the instant when the disk has turned through 0.300 rev? Express your answer with the appropriate units