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Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 26.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
A rifle with a weight of 20 N fires a 3.5-g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. m..
An LED’s color is determined by the energy needed to shift an electron across the band gap in the semiconductor from which the LED is made. Because blue photons have more energy than green photons, the development of blue LEDs has been slow. The mate..
A 3.60-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 9.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position, Where does this maximum speed occur
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 3.00 cos 5t + ? 5, Find the period and amplitude of the motion
A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the mag..
A ceiling fan is turned on and a net torque of 1.8 N·m applied to the blades. What is the angular acceleration of the blades
During the first stage of its launch, a space shuttle goes from rest to 4956 km/hwhile rising a vertical distance of 45.0km . Assume constant acceleration and no variation in g over this distance. A)What is the acceleration of the shuttle?
A sinusoidal wave of wavelength 1.91 m and amplitude 0.159 m travels with a speed of 0.743 m/s on a string. Find its angular wave number
A uniform plate of height 1.170 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y = 1.600 x2. Find the moment of inertia of the plate about the y-axis
A phone cord is 5.1 m long. The cord has a mass of 0.165 kg. A transverse wave pulse is produced by plucking one end of the taut cord. What is the tension in the cord
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×10^ 6N , one at an angle 19.0 ? west of north, What is the total work done by the two tugboats on the supertanker
A toy train rolls around a horizontal 1.3--diameter track. The coefficient of rolling friction is 0.12. What is the magnitude of the train's angular acceleration
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). How far is the object from the converging lens
What is the speed of a beam of pions if their average lifetime is measured to be 4.40 x 10-8 s? At rest, their lifetime is 2.60 x 10-8 s
Two wheels have the same mass and radius of 4.8 kg and 0.50 m, respectively. Find the net external torque that acts on each wheel
a projectile is launched vertically from the surface of the moon with an initial speed of 1100m/s. At what altitude is the projectile's speed one-half its initial value
An unhappy rodent of mass 0.289kg , moving on the end of a spring with force constant 2.52N/m , is acted on by a damping force Fx=?b?vx. If the constant b has the value 0.894kg/s , what is the frequency of oscillation of the mouse
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the velocity of the electron and direction
A 3.00 kg mass resting on a level table top is pulled along by a horizontal force of 16 N and accelerates at 4.00 meters per second per second. What is the force of friction between block and table.
In a test laboratory, an electric engine is used to accelerate a wheel from rest. what is the average power output of the engine
A charged particle initially moving south in a vertically downward magnetic field is deflected toward the east. What is the sign of the charge on the particle
When a woman who is 2 m tall stands near a flagpole, the shadow of her head and the shadow of the top of the flagpole are superimposed, Find the height of the flagpole
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