A ball is thrown straight up in the air. At what position is its kinetic energy a maximum? At what position is the gravitational potential energy of the ball-Earth system a maximum? Consider only the trip up
A 6.00 kg mass is located at (2.00 m, 2.00 m, 2.00 m) and a 5.00 kg mass is located at (–1.0 m, 3.00 m,–2.00 m). If this system of masses rotated about the X-axis perpendicular to the Z-Y plane, then the moment of inertia of this system is
Two harmonic waves are described by <img src="https://sciemce.com/files/2/ppg__cognero__Chapter_18_Superposition_and_Standing_Waves.__media__c4d75f13-9a5b-48ea-9d9e-00ca9dda880c.PNG" style="vertical-align: -21px;" width="225px" height="52px" align="absmiddle" /> <img src="https://sciemce.com/files/2/ppg__cognero__Chapter_18_Superposition_and_Standing_Waves.__media__2e78861d-b454-44f0-93d7-39177e151c0f.PNG" style="vertical-align: -21px;" width="225px" height="52px" align="absmiddle" />What is the magnitude of the speed (in m/s) of the two traveling waves?
The magnetic field at a certain distance from a wire carrying 2-A current is 4 μT. What will be the magnetic field if the current in the wire is doubled?
A wooden raft has a mass of 50 kg. When empty it floats in water (density 1000 kg/m3 ) with 69% of its volume submerged. What mass of sand can be put on the raft without it sinking?
A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0<img src="https://sciemce.com/files/4/3c624d9bb04dc39426.png" class="w-image" /> is 331 m/s. What is the frequency of the third mode?
A ping-pong ball has an average density of 0.140 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water?
Strictly speaking, if any electrical device in an automobile is turned on (such as an air conditioner or even headlights), more fuel is consumed by the engine. This statement is
A particle (charge = 50 μC) moves in a region where the only force on it is an electric force. As the particle moves 25 cm from point A to point B, its kinetic energy increases by 1.5 mJ. Determine the electric potential difference, VB − VA
A 5.00-g lead BB moving at 44.0 m/s penetrates a wood block and comes to rest inside the block. If half of its kinetic energy is absorbed by the BB, what is the change in the temperature of the BB? The specific heat of lead is 128 J/kg ∙ K
Because of their short lifetimes, very few muons that are produced in the upper atmosphere at high speeds should be observed at the surface of the Earth. Yet we detect large numbers of muons at ground level because of
A soap bubble film (n=1.42 ) of thickness 106 nm results in a constructive interference in the reflected light if this film is illuminated by a beam of light with a wavelength of 601 nm
Velocity Addition: Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, with equal speeds relative to Earth. As measured by a passenger in one of the spaceships, the other spaceship is 96 m long. What is the speed of the spaceships relative to Earth?
Addition by 1. Components: An airplane undergoes the following displacements, all at the same altitude: First, it flies 59.0 km in a direction 30.0° east of north. Next, it flies 58.0 km due south. Finally, it flies 100 km 30.0° north of west. Use components to determine how far the airplane ends up from its starting point.
A solid conducting sphere (radius = 5.0 cm) has a charge of 0.25 nC distributed uniformly on its surface. If point A is located at the center of the sphere and point B is 15 cm from the center, what is the magnitude of the electric potential difference between these two points?
Consider a car that travels between points A and B. The car's average speed can be greater than the magnitude of its average velocity, but the magnitude of its average velocity can never be greater than its average speed
Addition by 1. Components: The figure shows four vectors, <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g1.jpg" style="vertical-align: -5.0px;" />, <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g2.jpg" style="vertical-align: -5.0px;" />, <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g3.jpg" style="vertical-align: -5.0px;" />, and <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g4.jpg" style="vertical-align: -5.0px;" />. Vectors <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g5.jpg" style="vertical-align: -5.0px;" /> and <img src="https://sciemce.com/files/4/ppg__cp1pbb0313192044__f15g1q34g6.jpg" style="vertical-align: -5.0px;" /> both have a magnitude of 7.0 cm, and
A person consumes 2 200 kcal/day while expending 3 200 kcal/day. In a month's time, about how much weight would this person lose if the loss were essentially all from body fat? (Body fat has an energy content of about 4 100 kcal per pound.)