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A distant 546 Hz tuning fork produces a plane sound wave that moves along the positive x-axis and has an amplitude of 1.05*10^-8 m. write an expression for the displacement as a function of x and t
What is the rotational inertia of the wheel that has a kinetic energy of 12200 J when rotating at 300 rev/min?
When an air molecule is hit by an approaching fastmoving molecule, does its Rebound speed increase or decrease? How about when it hits a receding molecule?
A 2000 kg car is slowed down uniformly from 17.0 m/s to 5.00 m/s in 5.00 s. (a) What average total force acted on the car during that time?
A 210-kg crate is pushed horizontally with a force of 685 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
An instructor raises his eyebrows because he is very surprised by a student"s comment in class. Which of the following muscles is involved in his surprised expression?
A metal sphere of radius 19 cm has a net charge of 7.0X10-8 C. At what distance from the sphere's surface has the electric potential decreased by 700 V?
Two narrow slits 62um apart are illuminated with light of wavelength 480nm. What is the angle of the bright fringe in degrees?
A compound microscope has an objective lens of focal length 9.90 mm with an eyepiece of focal length 15.2 mm, and it produces its final image at infinity. The object to be viewed is placed 2.00 mm b
Calculate the free energy DeltaG at 25 ^circ rm C for the nonstandard conditions at point B where the reaction quotient Q is 2.75 times 10^{-5}.
A right triangle has a hypotenuse of length 3 m, and one of its angles is 30. What is the length of (a) the side opposite the 30 angle and (b) the side adjacent to the 30 angle?
A 13 g bullet traveling 224 m/s penetrates a 2 kg block of wood and emerges going 166 m/s. If the blosk is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges
You leave the doctor's office after your annual checkup and recall that you weighed 681 N in her office. You then get into an elevator that, conveniently, has a scale. Find the magnitude and directi
If a lunar colonizer has her blood pressure taken at her upper arm when it is raised 15.0 above her heart, what will be her systemic blood pressure reading, if she has normal blood pressure? The acc
When a 100 gram mass is suspended from a vertical spring and it remains motionless, what is the net force on the mass in this equilibrium position?
Describe the motion of an object: Describe the motion of an object:
A 91kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m.What is the net force exerted on the skier, assuming his acceleration is constant?
Water waves in a shallow dish are 5.0 cm long. At one point, the water moves up and down at a rate of 4.5 oscillations per second. What is the speed of the water waves?
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.60×105 kg, its speed is 26.8 m/s, and the net braking force is 4.30x10^5N, what is its speed 7.
Explain how a scale is used to draw the original vectors and find the magnitude of the resultant. B. Define the negative of a vector and define vector subtraction as a-b = a+(-b).
A dolphin leaps out of the water at an angle of 42.7 ° above the horizontal. The horizontal component of the dolphin's velocity is 9.10 m/s. Find the magnitude of the vertical component of the v
Suppose a hanging 1.0 kg lab mass is attached to a 4.0 kg block on the table. If the coefficient of kinectic friction, mu is 0.20., what is the acceleration of the block?
Calculate the rotational inertia of a meter stick, with mass 0.80 kg, about an axis perpendicular to the stick and located at the 39 cm mark. (Treat the stick as a thin rod.)
Discuss the proper position of a slide relative to the lens in a slide projector. What type of lens must the slide projector have?
The masses of the earth and moon are 5.98x1024 and 7.35x1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each is