Answers created by Daniel W.

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• When monochromatic light shines perpendicularly on a soap film (n= 1.35) with air on each side, the second smallest nonzero film thickness for which destructive interference of reflected light is observed is 296 nm . What is the wavelength of the light ?
  
• How is light formed?
  
• A lamp is plugged into a standard 120-volt outlet. If the lamp draws a current of 0.5-amps, how much energy is consumed in 1 minute?
  
• If the speed of rotation of AC generator is made four times of its initial value then what is the percentage increase in induced emf?
  
• An aircraft carrier made a trip to Guam and back. The trip there took three hours and the trip back four hours. It averaged 6 km/h on the return trip. What is the average speed of the trip there?
  
• Question #06e0b
  
• Question #d1df7
  
• Question #51a07
  
• Help with electron and radiation regarding Vmax? Does emission occur??
  
• True or false the motion of a projectile thrown Horizontally is a two dimensional motion?
  
• Question #baf29
  
• Does the slope value obtained from a best-fit line on a velocity-time graph represent acceleration or average acceleration?
  
• Question #b5c4c
  
• Can you help me please ? With some details.. thank you ^^
  
• Question #61b2d
  
• Question #bfd15
  
• Question #cb744
  
• If there is a sphere made up of one hemisphere of Copper and another of iron, On heating what would be its effect and where would its centre of gravity be?
  
• For an LDR, does an increase in light intensity increase its resistance and thus increase the potential difference that goes through it?
  
• Question #ff252
  
• A stick of 5cm contains two parallel forces P&Q as the picture.the resultant force is 50N which is 2cm far from P force on the stick.what is the value of P&Q?
  
• Question #5669f
  
• Question #c022b
  
• A vehicle accelerates from rest, travels at uniform velocity and then decelerates to rest all in a total time of 20 seconds. The time spent accelerating is equal to the time spent decelerating. For how long does it travel at uniform velocity?
  
• What is the meaning of "Assume when using a meter stick measuring can be done so that the last significant figure is in the tenth of a millimeter digit".?
  
• Question #4d466
  
• Question #9a1d2
  
• Question #3f7bf
  
• Question #3f7bf
  
• Question #810cb
  
• A resting car starts accelerating with a = 5.0 m/s^2, then it goes uniformly, and finally, decelerates at the same rate (a) and comes to a stop. The total time of motion equals t = 25 s. The average velocity is v= 72 kmph. How long does it move uniformly?
  
• Question #aaeb4
  
• If a #6 kg# object moving at #12 m/s# slows down to a halt after moving #9 m#, what is the friction coefficient of the surface that the object was moving over?
  
• Question #ca4d9
  
• Can anyone help me with the following question please? Thanks in advance!
  
• Question #3eaa9
  
• What are some examples of the kinetic theory of gases?
  
• Question #51a0d
  
• Question #4120e
  
• Question #8f92d
  
• Question #8f0ee
  
• If a wire of resistance #R# is melted and recast into a wire of length #2/5#th that of the original wire, what is the resistance of the new wire?
  
• Question #8773b
  
• Briefly explain why the tyres of tractor are large and wide?
  
• Question #b66f4
  
• Question #e2cd6
  
• Jack rides his bicycle along a level road and has a total kinetic energy od 1440J. He brakes, exerting a force of 200N on the wheels. a) How far does he travel before he stops? b) What happens to temputure of the brakes? Explai your answer.
  
• A ball with a mass of #3 kg # and velocity of #5 m/s# collides with a second ball with a mass of #7 kg# and velocity of #- 1 m/s#. If #25%# of the kinetic energy is lost, what are the final velocities of the balls?
  
• What is the visible light intensity at the surface of the bulb?
  
• A #5 L# container holds #12 # mol and #6 # mol of gasses A and B, respectively. Every four of molecules of gas B bind to three molecule of gas A and the reaction changes the temperature from #360^oK# to #420 ^oK#. By how much does the pressure change?
  
• The temperature of a sample of iron with a mass of 10.0 g changed from 50.4°C to 25.0°C with the release of 114 J of energy. What is the specific heat of iron?
  
• How much work does it take to raise a #5 kg # weight #42 m #?
  
• The bolts on a car wheel require tightening to a torque of 90 N-m. If a 30 cm long wrench is used, what is the magnitude of the force required when the force applied at 53° to the wrench?
  
• One millivolt is equal to how many volts?
  
• Question #20ecb
  
• Question #9de8c
  
• A projectile is shot at an angle of #pi/8 # and a velocity of # 25 m/s#. How far away will the projectile land?
  
• Question #9d679
  
• How many wavelengths are on this spring? What is the wavelength of this standing wave? What is the speed of the wave on the spring? What is the tension on the spring? What is the mass of the spring?
  
• If an object is dropped, how fast will it be moving after falling #3 m#?
  
• Question #091bb
  
• The position of an object moving along a line is given by #p(t) = 2t - sin(( pi )/6t) #. What is the speed of the object at #t = 4 #?
  
• An object with a mass of #4 kg#, temperature of #240 ^oC#, and a specific heat of #15 J/(kg*K)# is dropped into a container with #15L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?
  
• Some very hot rocks have a temperature of #360 ^o C# and a specific heat of #125 J/(Kg*K)#. The rocks are bathed in #144 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?
  
• Question #688c8
  
• A #5 L# container holds #15 # mol and #6 # mol of gasses A and B, respectively. Every three of molecules of gas B bind to two molecule of gas A and the reaction changes the temperature from #360K# to #210K#. By how much does the pressure change?
  
• Question #d0a1c
  
• A model train, with a mass of #8 kg#, is moving on a circular track with a radius of #2 m#. If the train's kinetic energy changes from #32 j# to #12 j#, by how much will the centripetal force applied by the tracks change by?
  
• If #9/7 L# of a gas at room temperature exerts a pressure of #8 kPa# on its container, what pressure will the gas exert if the container's volume changes to #3/4 L#?
  
• How does impulse relate to work?
  
• What is important to know to be able to calculate the number of photoelectrons produced by a beam of light?
  
• Question #9b08b
  
• Question #d5480
  
• Person A travels up in an elevator at uniform acceleration. During the ride, he drops a ball while Person B shoots an arrow upwards directly at the ball. How much time will pass after Person B shot the arrow before the arrow hits the ball?
  
• Person A travels up in an elevator at uniform acceleration. During the ride, he drops a ball while Person B shoots an arrow upwards directly at the ball. How much time will pass after Person B shot the arrow before the arrow hits the ball?
  
• Question #98f1c
  
• Question #914c6
  
• A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #15 m#. If the train's kinetic energy changes from #18 j# to #12 j#, by how much will the centripetal force applied by the tracks change by?
  
• Question #864df
  
• Question #eda19
  
• How does radiation change across the electromagnetic spectrum?
  
• If a projectile is shot at an angle of #pi/12# and at a velocity of #16 m/s#, when will it reach its maximum height??
  
• A charge of 2 μC is located 48 cm above the origin. A second charge of -8 μC is located 48 cm below the origin. What is the magnitude and direction of the net electric field at the origin?
  
• A force of 38 newtons is acting on an object making an angle of 55° with the horizontal. What is the value component of the force acting along the y-axis?
  
• Which electromagnetic waves have the highest frequency?
  
• Resolve two forces at 120º to each other?
  
• Resolve two forces at 120º to each other?
  
• If a rocket with a mass of 4000 tons vertically accelerates at a rate of # 6/5 m/s^2#, how much power will the rocket have to exert to maintain its acceleration at 11 seconds?
  
• How much work would it take to push a # 8 kg # weight up a # 13 m # plane that is at an incline of # pi / 4 #?
  
• If a #2 kg# object is being constantly accelerated from #0m/s# to #15 m/s# over # 6s#, how much power is being applied at #t= 3 #?
  
• What is the cue ball's momentum after the collision? What is the 5-ball's kinetic energy after the collision? What was the cue ball's momentum before the collision? What was the speed of the cue ball before the collision?
  
• What impulse occurs when an average force of 9 N is exerted on a 2.3 kg cart, initially at rest, for 1.2 s? What change in momentum does the cart undergo? What is the cart's final speed?
  
• Question #67f33
  
• Question #b7a84
  
• A body builder at the gym is lifting a 50kg dumbell. His arm measures 47cm from hand to elbow and 39cm from elbow to shoulder. If he does a front shoulder raise so that his shoulder is in the center of the circle, how much torque will it require?
  
• What are the names, charges, and locations of the three types of subatomic particles that make up an atom?
  
• The ISS orbits around Earth, at an altitude of 350. km. What is the speed? What is the period? How many orbits will complete per day?
  
• As she climbs a hill, a cyclist slows down from 25 mi/hr to 6 mi/hr in 10 seconds. What is her deceleration?
  
• Question #660d8
  
• How do you find molar mass?
  
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