Answers edited by A08

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• Why does the brightness of the light emitted by a flashlight decrease as the flashlight moves farther away from you?
  
• An object has a mass of `4 kg`. The object's kinetic energy uniformly changes from `144 KJ` to `124KJ` over `t in [0, 6 s]`. What is the average speed of the object?
  
• Question #7132d
  
• Question #27dca
  
• Question #431ec
  
• A basketball player rides a motorcycle off a ramp. When he is in midair, his teammate throws a ball straight up to him and he catches it to slam dunk. How far away from the bottom of the ramp should the teammate stand?
  
• Question #1b31b
  
• How are harmonics generated in a transformer?
  
• Question #e36fd
  
• Question #aa03b
  
• How can you use trigonometric functions to simplify `22 e^( ( 3 pi)/4 i )` into a non-exponential complex number?
  
• How do I use a graphing calculator to find the real zeros of `y=(x-12)^3-7`?
  
• Question #deecf
  
• How do you solve using the completing the square method `5x^2 + 3x - 1 = 0`?
  
• The diameter of a red blood cell is `8.4 * 10^-6`. The diamater of the average cell in the human body is `1 * 10^-5`. How many times larger is the diameter of the average cell than the diameter of the red blood cell?
  
• A crane lowers a 600kg generator by attaching 4 cables to it at an angle of 67° compared to the horizontal. The generator moves at a rate of -2.12m/s². How much tension is on each cable?
  
• In parallel RC circuits, is it true that the larger the value of C, the larger the phase angle?
  
• How do you translate the following statement "x plus y squared X + Y" into an algebraic expression?
  
• How to find the moment of inertia of a solid cylinder about transverse (perpendicular) axis passing through its center?
  
• How many electrons jump from your hand to the knob?
  
• How do you solve `log_10(x-1) - log_10(x+1) = 1`?
  
• Question #869fd
  
• Question #514a7
  
• If a `12 kg` object is constantly accelerated from `0m/s` to `4 m/s` over 7 s, how much power musy be applied at `t=1`?
  
• Question #58e92
  
• Question #8331a
  
• What is the direction of the magnetic force on the proton? What is the magnitude of the magnetic force on the proton?
  
• Question #d4e0c
  
• How do you convert -5.7 (7 repeating) as a fraction?
  
• Question #78d38
  
• The sum of three consecutive integers is 264. What are the three integers?
  
• A ball is kicked past a player who has a reaction time before he chases after the ball. The player accelerates to catch up to the ball rolling at constant speed. What is the time and distance the player has to run for after the ball passes the player?
  
• Question #21d0f
  
• Integrate `lnx/10^x`?
  
• How is the fuction v(t)? And how to set the graph?
  
• In parallel RC circuits, is it true that the larger the value of C, the larger the phase angle?
  
• A projectile is shot at a velocity of `4 m/s` and an angle of `pi/12`. What is the projectile's maximum height?
  
• I just want to make sure about a concept : What is `0/0`? Usually anything divided by `0` is undefined, but a past student of mine reckons they were taught it is `1`. Is there any theorem or proof of this? Thanks
  
• Does it require more force to start an object sliding or to keep it sliding?
  
• 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?
  
• An airplane accelerates down a runway at 3.20 m/s_2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff?
  
• Question #3772b
  
• In the figure, a frictionless roller coaster car of mass m = 805 kg tops the first hill with speed vi = 18 m/s at height h = 41 m. What is the speed of the car at (a) point A, (b) point B, and (c) point C? (d) How high will the car go on the last hill ?
  
• A ball with a mass of `6 kg` moving at `3 m/s` hits a still ball with a mass of `8 kg`. If the first ball stops moving, how fast is the second ball moving?
  
• What does gravity mean in space?
  
• How do you graph `sqrt(ln x)`?
  
• What is the total number of ions present in the formula Na2SO4?
  
• Question #4a339
  
• If an object with uniform acceleration (or deceleration) has a speed of `3 m/s` at `t=0` and moves a total of 4 m by `t=5`, what was the object's rate of acceleration?
  
• How do you graph `ln(-x)`?
  
• Question #ba0bf
  
• How do you find sum of geometric series 2+6+18+...+1458?
  
• Question #11ae5
  
• A circular curve of highway is designed for traffic moving at 92 km/h. When assumed the traffic consists of cars without negative lift ?
  
• How do I calculate the angular velocity of a falling object?
  
• The force applied against a moving object travelling on a linear path is given by `F(x)=2+e^x`. How much work would it take to move the object over `x in [0,2 ]`?
  
• If an object with a mass of `3kg` changes speed from `5m/s` to `1m/s`, by how much does its kinetic energy change?
  
• How do you find the exact relative maximum and minimum of the polynomial function of `g(x) =x^3 + 6x^2 – 36`?
  
• How do you condense `log_5 (6) - log_5 (m)`?
  
• How is it done(physics)?
  
• What is the wavelength of red light with a frequency of `460 * 10^12` `Hz`?
  
• How many earth years does it take to equal one light year?
  
• What is the equation of the line with slope `m= 1/3` that passes through `(-7/15,-5/24)`?
  
• Question #2bc5b
  
• Question #914c6
  
• A 1000kg car, travelling east at 30.0m/s, collides with a 3000kg truck, travelling north. After the collision, the vehicles stick together and the combined wreckage moves at 55.0◦ north of east. (a) What is the speed of the truck before the collision?
  
• What is a manometer? And how is this used to measure pressure?
  
• How do you convert 0.312 (12 repeating) to a fraction?
  
• The barium-yttrium ceramic compound used to demonstrate superconductivity will work only if supercooled to a temperature of 125 K. What is the equivalent temperature in °C and in °F?
  
• In nuclear physics, what is meant by the term 'mass defect', and what is its relation to nuclear energy?
  
• How do you multiply `(x-9)^2`?
  
• How do you write 0.096 in scientific notation?
  
• An airplane accelerates down a runway at 3.20 m/s_2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff?
  
• How do you factor `12x^2-40x-32`?
  
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