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Physics
Physics
High School
assume that the readings on the thermometers are normally distributed with a mean of and standard deviation of 1.00c. a thermometer is randomly selected and tested. draw a sketch and find the temperature reading corresponding to , the percentile. this is the temperature reading separating the bottom from the top
Physics
High School
Why is sleep the most important thing?
Physics
High School
a seagull is sitting in the water surface and a simple water wave passes under it. what sort of motion does the gull experience? why?
Physics
High School
You add equal amounts of heat to two identical cylinders containing equal amounts of the same ideal gas. Cylinder A is allowed to expand, while cylinder B is not.Part A How do the temperature changes of the two cylinders compare?The two cylinders will experience the same temperature change.Cylinder A will experience a greater temperature change.Cylinder B will experience a greater temperature change.
Physics
High School
suppose a particle called a kaon is created by cosmic radiation striking the atmosphere. it moves by you at 0.980c and it lives 1.24 x 10-8 s when at rest relative to an observer. how long does it live as you observe it?
Physics
High School
what type of vision allows the eyes to detect color? group of answer choices scotopic vision photopic vision both niether
Physics
High School
a mass is connected to a spring and is allowed to move horizontally. the mass is at a position l when the spring is unstretched. the mass is then moved, stretching the spring, and released from rest. it then moves with simple harmonic motion.
Physics
High School
an electromagnetic wave with a peak magnetic field magnitude of 1.50 10-7 t has an associated peak electric field of what magnitude?
Physics
College
Children become increasingly finicky about food ___ years of age
Physics
College
A permanent magnet is pushed into a coil of wire, left there for a while, andthen pulled out. When does a current run through the wire?OA. As the magnet moves into and out of the coilOB. Only when the magnet is first being pushed into the coilOC. While the magnet remains within the coilOD. From the time that the magnet is pushed in to the time it is pulledout
Physics
High School
consider position b, and then solve the following problem. assume the angle to the vertical line for position b is 45 degrees. now also assume that the main muscle that holds the arm in position is the deltoid muscle, represented by a red arrow. the angle of the deltoid muscle is 15 degrees and its distance to the center of rotation is 17 cm. if the cog for the arm is 38 cm from the center of rotation, and its weight is 35 n, what is the force that the deltoid muscle must exert to keep the arm stationary in 45 degrees position?
Physics
High School
which method of measuring distances would you use if you wanted to measure the distance to stars in a nearby galaxy?
Physics
High School
What is the new orbital speed after friction from the earth's upper atmosphere has done 7. 5109J of work on the satellite?
Physics
High School
two metal spheres connected by a metal rod stand on plastic supports. initially the spheres and metal rod do not hold any charge. a charged plastic rod with q (q>0) is placed near the sphere on the right without touching it. then, the metal rod connecting the spheres is removed. finally, the initially charged plastic rod is taken away. at this point: a. spheres attract one another b. spheres repel one another c. spheres do not exert a force on one another d. not enough information
Physics
High School
What is the change in momentum of a car weighing 1500kg when its speed increases from 36km h to 72km h uniformly?
Physics
High School
two ice skaters of equal mass grab hands and spin in a circle once every four seconds. their arms are 0.76 m long, and they each have a mass of 55.0 kg. how hard are they pulling on one another?
Physics
High School
A mass is connected to a spring and is allowed to move horizontally. The mass is at a position L when the spring is unstretched. The mass is then moved, stretching the spring, and released from rest. It then moves with simple harmonic motion.1. At the instant that the mass passes through the position where the spring is unstretched, what can be said about its instantaneous acceleration?2. At the instant that the mass passes through the position where the spring is unstretched, what can be said about its instantaneous speed?3. At the instant that the spring is compressed the most, what can be said about the magnitude of its instantaneous velocity?
Physics
High School
a monochromatic light beam is incident on a barium target that has a work function of 2.50 ev. if a potential difference of 1.00 v is required to turn back all the ejected electrons, what is the wavelength of the light beam?
Physics
High School
which electromagnetic radiation wavelength is efficiently observed using ground based telescopes?
Physics
High School
how does the difference between the ranges of the strong nuclear force and the coulomb force affect the makeup of each atoms nucleus?
Physics
High School
what force does the water exert (in addition to that due to the atmospheric pressure) on a submarine
Physics
High School
in which case will more current flow through the battery: when three identical resistors are connected in series with the battery, or when the same three resistors are connected in parallel with the battery.
Physics
High School
a 100-turn loop antenna of radius 20 cm operating at 10 mhz in air is to give a 50 mv/m field strength at a distance 3 m from the loop. determine (a) the current that must be fed to the antenna (b) the average power radiated by the antenna
Physics
High School
a 550 kg satellite is in a circular orbit at an altitude of 400 km above the earth's surface. because of air friction, the satellite eventually falls to the earth's surface, where it hits the ground with a speed of 2.20 km/s. how much energy was transformed into internal energy by means of air friction?
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