Physics

an 82-kg skater is pushed on a frictionless surface through a straight line displacementof = (13.2m) + (18.9m) by a force = (182n) + (121n) .how much work does the force do on the skater during this displacement?
1 Answer
If you have a potential energy of 57 J. Now double your height, what is your new potential energy?
1 Answer
Claim how it would be possible to predict the speed that a 2000 kg car full with riders will reach before its ever placed on the track. Cite evidence by using the appropriate formulas and reasoning by solving them in order to calculate the speed of the car at the bottom of the first hill
1 Answer
A plate falls vertically to the floor and breaks up into three pieces, which slide along the floor. Immediately after the impact, a 320-g piece moves along the x-axis with a speed of 2. 00 m/s and a 355-g piece moves along the y-axis with a speed of 1. 50 m/s. The third piece has a mass of 100 g. In what direction does the third piece move? you can neglect any horizontal forces during the crash.
1 Answer
How would an increase in the number of birds affect the number OF mice. Explain ur answer
1 Answer
What is the frequency of red light, which has a wavelength of around 6. 35 * 10 ^ 7 - 7 m? (Remember: speed of light is 3*10^ 1 8 m/s) Be sure to show all work
1 Answer
at what time of the day is the demand of electricity highest?
1 Answer
A 100-coil spring has a spring constant of 470 n/m. it is cut into four shorter springs, each of which has 25 coils. one end of a 25-coil spring is attached to a wall. an object of mass 35 kg is attached to the other end of the spring, and the system is set into horizontal oscillation. what is the angular frequency of the motion?
1 Answer
Bob has been asked to produce a fuse that has 3. 2 ohms of resistance. He cannot change he thickness of the wire but can change its length. Explain in detail how bob could work out what length of wire to use. You will need to describe the experiment he will need to carry out , any hazards and any variables involved
1 Answer
Jeremiah is conducting an investigation about the water cycle. He is given the following materials:a lampa glass jar that contains waterplastic wrapDescribe how Jeremiah can arrange these materials to create a model that shows the processes by which water is cycled from a lake into the atmosphere and back to the lake. Be sure to identify what each material represents in the model.
1 Answer
Would one way more or less on Earth's moon than on the dwarf planet Pluto?Hint: Earth's moon is slightly larger than pluto
1 Answer
A megaphone amplifies sound byall the aboveincreasing the range of frequencies that can be produced.focusing sound energy into one specific direction.spreading out the sound waves over a large area.
1 Answer
An electron moves with an unknown velocity through a magnetic field of 1. 56 T that points directly east. The electron experiences a force of 6. 24 x 10-15 N directly south. What is the magnitude and direction of the velocity? Show your work. (The charge of an electron is -1. 6 x 10-19 C)
1 Answer
Question 6Two ropes are attached to a tree, and forces of F =2.01 +4.03 N and F=3.01+6.01 Nare applied. The forces are coplanar (in the same plane). Find the magnitude of thenet force.15 N
1 Answer
Estimate how the phase difference would change when the value of changes from zero to infinity in the circuit
1 Answer
a gymnast does cartwheels along the floor and then launches herself into the air and executes several flips in a tuck while she is airborne. if her moment of inertia when executing the cartwheels is and her spin rate is 0.5 rev/s, how many revolutions does she do in the air if her moment of inertia in the tuck is and she has 2.0 s to do the flips in the air?
1 Answer
Researchers are trying to use radiocarbon dating to determine when the wooden buildings at an archaeological site were constructed. They know that trees in the area would have been cut down for the construction, and that when the trees died, they would have a ratio of carbon-14 to carbon-12 of about one part per trillion (1 ppt). The half-life for the decay of carbon-14 is 5,730 years, and they discover the ratio of carbon-14 to carbon-12 to be about 0. 125 parts per trillion (ppt). What is the age of the buildings at the site? *716. 25 years5,730 years17,190 years0. 125 billion years
1 Answer
a predatory bird is chasing its prey at 15.3 m/s when it emits a 202 hz squawk. ifthe prey is moving away from the predator at 13 m/s, what frequency will it hear ifthe air temperature is 27 c?
1 Answer
2) A car travelling at 35. 0 km / hr speeds up to 45 km / hr in a time of5. 00 s. The same car later speeds up from 65 km / hr to 75 km/hr ina time of 5. 00 sec. a. Calculate the magnitude of the constant acceleration for each ofthese intervals. b. Determine the distance traveled by the car during each of thesetime intervals.
1 Answer
1.Which of the following is not true concerning sound waves?Sound requires a medium.Sound waves are longitudinal waves.MacBook AirSound requires a vibrating object.Sound waves cause particles to vibrate perpendicular tothe direction of the wave.
1 Answer
Find the radius of the path described by a proton moving at 175 km/s in a plane perpendicular to a 64. 6- mt magnetic field
1 Answer
Some machines will have a body constructed around a frame for_____
1 Answer
A pumpkin was rolling down a hill that is 12. 3 miles long from top to bottom. The pumpkin achieved a final velocity of 42. 4 m/s and it took3. 5 minutes to roll down the hill The pumpkin had a mass of 4780 grams. What momentum AND force did the pumpkin have at thebottom of the hill?
1 Answer
What is the S-P difference (sec)?What is the amplitude (mm)?What is the distance (km)?What is the magnitude (M)?
1 Answer