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A spotlight on a boat is a = 2.5 m above the water, and the light strikes the water at a point that is x = 8.0 m horizontally displaced from the spotlight (see the drawing). The depth of the water
A small object rests on the bottom of the cistern at its center. How far from the edge of the cistern can a girl whose eyes are 1.2 m from the ground stand and still see the object?
A small fly of mass 0.10 g is caught in a spider's web. The web vibrates predominately with a frequency of 9.0 Hz. What is the value of the effective spring stiffness constant k for the web?
Draw a sketch of the situation and a force diagram of the suitcase, labeling all forces clearly. With what force does the woman have to pull to start the suitcase moving from rest?
A 500 turn solenoid with a length of 20 cm and a radius of 1.5 cm carries a current of 3.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have
Pipe y is closed at one end and also produces a note of frequency 28Hz when the air in the pipe vibrates in its fundamental mode. The best estimate for the length of pipe y is?
A 3.50-m-long, 310 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70.0 kg construction worker stands at the far
After what interval does the snowball hit the tree? At what height above the ground will the snowball hit the tree? Determine the snowball's velocity as it strikes the tree.
In a ballistics test, a 24.0 g bullet traveling horizontally at 1100 m/s goes through a 40.0 cm-thick 450 kg stationary target and emerges with a speed of 800 m/s. The target is free to slide on a
What is the minimum coating thickness needed to ensure that light of wavelength 590 nm and of perpendicular incidence will be reflected from the two surfaces of the coating with fully constructive i
A 4.5 kg fish swimming 3 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch. What is the velocity v of the smaller fish
The sun had the same mass that it presently does and that the earth moved in a circular orbit having the same radius as its present orbit?
An electron is moving at a speed of 1.0 104 m/s in a circular path of radius of 2.1 cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. Th
A 950 kg sports car collides into the rear end of a 2100 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 3.1 m before stopping. The police offi
The specific heat capacity of air is approximately 1000.0 J/kg * degrees C, and the density of air is approximately 1.29 kg/m^3.
A person pulls a 26 kg suitcase using a rope attached to the suitcase at an angle of 28 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the co
A sound source at a frequency of 500 Hz has an acoustic power of 1/10 of a watt. How do you find the intensity 1/2 a m from the source, the pressure amplitude, and the magnitude of the specific aco
After a 0.380-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. Determine the magnitude and direction of the impulse delivered to
A uniform plank of length 5.0 m and weight 211 N rests horizontally on two supports, with d = 1.17 m of the plank hanging over the right support. To what distance, x, can a person who weighs 412 N
An air-filled parallel-plate capacitor has plate area A and plate separation d. The capacitor is connected to a battery that creates a constant voltage V. Find the energy U_0 stored in the capacito
Two identiocal batteries of emf 11.9 v and internal resistance 0,276 ohm are to be connected to an external resistance R either in series or parallel; if R =0.492 ohm, what is the current in the ex
What energy transfers take place during the hydrologic cycle? i keep getting different answers. Conduction, convection, radiation as well as latent heat of fusion and latent heat of vaporization.
An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 200 m in diameter, what is the x component of this runner's average velocity between points A and B
A magnetic field of 0.8 T is perpendicular to a square coil of 10 turns. The length of each side of the coil is 8 cm. Find the magnetic flux through an individual turn of the coil.
Express your answer in terms of the speed v2 of the water as it leaves the faucet, the magnitude g of the acceleration due to gravity, and the distance h of the water between the faucet and the lowe