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A 186 watt motor is used to lift a 114 kg container to a height of 6 m. How much time does it take to lift the container with the motor?
A 300 block on a 52.0 -long string swings in a circle on a horizontal, frictionless table at 60.0 . What is the speed of the block?
A rectangular container measuring 16 cm 42 cm 71 cm is filled with water. What is the mass of this volume of water in kilograms and grams?
A thin conducting wire of length 3w forms a planar equilateral triangle. A direct current I flows in the wire. Find the magnetic flux density at the center of the triangle.
The solar power per unit area reaching the Earth's surface is 235 W/m2, averaged over a 24 hour day. If you live in a house whose average power requirement is 3 kW and you can convert solar power t
If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 164 Hz? Answer in units of cm.
You determine that at sealevel and a temperature of 20 deg C, the speed of sound is 365 meters/sec. You know that the actual value is 344 meters/sec. How much is your percentage error?
The angle between the electric field vector and the vector normal to the rectangular plane is 65.0°. What is the electric flux through the rectangle?
A solid cylindrical disk has a radius of 0.11 m. It is mounted to an axle that is perpendicular to the circular end at its center. When a 50-N force is applied tangentially to the disk, perpendicul
A 76 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 85 cm. What is the speed of the arrow as it leaves the bow?
An airplane is flying with a velocity of 80.0 at an angle of 18.0 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out o
A diver notices that no light appears to be coming toward her greater than the angle theta, measured from the vertical. If the index of refraction of water is 1.33, what is the angle theta?
A 40.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 18.0 m. (a) What is the centripetal acceleration of the child?
Determine a)the time between take off and landing b)the length d of the jumpc) the verticle distance between the skier and the landing hill?
A motorist drives north for 35.0 minutes at 87.0 km/h and then stops for 12.5 minutes. He then continues north, traveling an additional 130 km in 2.40 h. (a) What is his total displacement? (b) What
Calculate the maximum number of kilograms of water (100 °C) that could be boiled intosteam (100 °C) using energy from this battery.
A 1.27 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.636 m, and the string can support a mass of 20.6 kg before breaking. The accelera
A person on earth measures that the time between flashes is 2.7 s. How fast is the "police car" moving relative to the earth?
What is the magnitude and direction of the boat's acceleration? Enter a positive answer for a direction due west, or a negative answer for a direction due east.
In order to get a large Doppler shift, the source or observe must be traveling at a reasonable fraction of the velocity of the wave. However, police officers can use the Doppler shift of microwaves
Find the rms current in the circuit. Find the voltage drop across the inductor. Find the voltage drop across the capacitor. What is the phase angle for the circuit?
A horizontal force of 140.0 N is used to push a 40.0 kg packing crate a distance of 6.00 m on a rough horizontal surface. The crate moves at constant speed. Find the coefficient of kinetic friction
Find the current in the circuit. Answer in units of mA. What is value of the inductor that must be inserted in the circuit to reduce the current to one-half the previous current?
A trapeze artist swings in simple harmonic motion with a period of 3.8 s. Calculate the length of the cables supporting the trapeze.
A farsighted person has a nearpoint of 50 cm from her eyes. She wants glasses that will let her see objects at a distance of only 25 cm from her eyes. Determine the focal length of the glasses need