Expert Physics Solutions - Learn Smarter, Faster!

What principles of science (like facts, laws, and theories) might help explain why similar investigations conducted in many parts of the world could result in the same outcome?
1 Answer
For a conductor in electrostatic equilibrium, which of the following properties are true? Choose all that apply. For a conductor in electrostatic equilibrium, which of the following properties are true? Choose all that apply. The electric field inside is zero. The entire conductor is at the same potential. Any excess charge is uniformly spread throughout the volume of the conductor.
2 Answers
A dockworker loading crates on a ship finds that a 26-kg crate, initially at rest on a horizontal surface, requires a 72-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 54 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor. g
1 Answer
A pilot is upside down at the top of an inverted loop of radius 3.20 x 103 m. At the top of the loop his normal force is only one-half his normal weight. How fast is he going
1 Answer
Levers pivot on theA. fulcrumB. resistance armC. effort armD.moon
1 Answer
A pressure vessel that has a volume of 10m3 is used to store high-pressure air for operating a supersonic wind tunnel. If the air pressure and temperature inside the vessel are 20 atm and 300K, respectively: What is the mass of air stored in the vessel
1 Answer
Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 4.6 m/s. Neil is in front of her. With respect to the ground, Neil is skating due west at a speed of 4.4 m/s. Find Neil's velocity (a) magnitude and (b) direction relative to due west, as seen by Barbara.
1 Answer
Block B (of mass m) is initially at rest. Block A (of mass 3m) travels toward B with an initial speed v0 (vee nought) and collides in an inelastic collision. Given that all surfaces have negligible friction, determine the maximum height h reached by thetwo blocks.
1 Answer
What is the mechanical advantage of a 8 m ramp that rises 2 m to a stage?
1 Answer
Determine the maximum volume in gallons [gal] of olive oil that can be stored in a closed cylindrical silo with a diameter of feet [ft] so the total pressure at the bottom of the container will not exceed pound-force per square inch [psi]. Assume the height of the tank is sufficient to store the amount of olive oil required, and the surface pressure is 1 atmosphere [atm]. The specific gravity of olive oil is 0.86.
1 Answer
20 points + Brainliest. Please help!A piston is made of a gas-enclosed cylinder with a moveable top. For the system of the piston to be thermodynamic equilibrium, which set of condition must hold true?A. Heat is added to the system, but never leaves itB. Work is done by the system not on it.C. Temperature and pressure are uniform throughout the systemD. Heat transfer and volume changes both occur very quickly
1 Answer
20 points + Brainliest. Please help!A piston consists of a closed cylinder with a moveable top. When a chemical reaction heats the gas inside the piston, the gas expands and lifts the top. For the thermodynamic system of the piston, are the values of heat Q and work W positive, zero, or negative?A. Both Q and W are positiveB. Q is positive, W is negativeC. Both Q and W are negativeD. Q is positive, W is zero
1 Answer
A 100 N force directed at 60 above the horizontal pulls a box 2 m horizontally across a floor. How much work was done?A. 50 JB. 20 JC. 100 JD. 200 J
2 Answers
Calculate the force of gravity on a 1kilogram box located at a point 1.3 10^7 meters from the center of Earth. (The value of G is 6.673 10^-11 newton meter^2/kilogram^2. The mass of Earth is 5.98 10^24 kilograms.)
1 Answer
A group of students are playing tug-of-war. The students on bothsides of the rope are pulling with equal force so that the rope is notmoving. This is an example of?
1 Answer
Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will ____.doubles decreases by half of half quadruples decreases by half
2 Answers
he composition of the ancient atmosphere can be determined by analyzing bubbles of air trapped in amber, which is fossilized tree resin. (This is one way we know that the air in the time of the dinosaurs was richer in oxygen than our current atmosphere.) An air bubble appears to be 7.2 mm below the flat surface of a piece of amber, which has index of refraction 1.54. How long a needle is required to reach the bubble
1 Answer
On a sunny summer day, with the sun overhead, you can stand under a tree and look on the ground at the pattern of light that has passed through gaps between the leaves. You may see illuminated circles of varying brightness. Why are there circles, when the gaps between the leaves have irregular shapes
1 Answer
HELP URGENT WILL GIVW BRAINLIEST
1 Answer
How would the gravitational force between the Earth and Moon change if the distance between them was halved? The gravitation force would be nullified; there would no longer be a gravitational force between the Earth and Moon The gravitational force would be stronger The gravitational force would not change The gravitational force would be weaker
2 Answers
Orchestra instruments are commonly tuned to match an A-note played by the principal oboe. The Baltimore Symphony Orchestra tunes to an A-note at 440 Hz while the Boston Symphony Orchestra tunes to 442 Hz. If the speed of sound is constant at 343 m/s, find the magnitude of difference between the wavelengths of these two different A-notes. (Enter your answer in m.)
1 Answer
A soccer field is viewed from above, while a ball is kicked eastward with an initial speed of 10.0 m/s. The ball experiences a constant eastward acceleration of 0.75 m/s 2 over a distance of 20.0 m. Immediately after this 20.0 m distance, the ball is kicked northward in a manner that does not change its speed at that point, just its direction. The ball is allowed to come to a complete stop. How far north does the ball travel before stopping if the acceleration after this kick is 1.15 m/s 2
1 Answer
5 pointsA ball is thrown upward from y=0, with an initial velocity vo and then slows down with constant acceleration due tothe Earth's gravity. The ball comes to rest at a height h. Which one of the following formulas correctly states thedistance, h, to the top of the trajectory in terms of the initial velocity?
1 Answer
A brick has a mass of 3 kg on the Earth. If the acceleration due to gravity on Jupiter is 2.5 times that of the Earth. What is theweight of the brick on Jupiter in Newtons?0 9.82.2522.0532.2O 73.5
1 Answer