Answers created by reudhreghs

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• How do you factor the trinomial `a^3-5a^2-14a`?
  
• Question #bfc9a
  
• Question #8e9bb
  
• What is the name given to the polymers that can be melted and reshaped or heated and bent?
  
• How do oceans affect climate change?
  
• Which has the largest radius, magnesium (Mg), silicon (Si), sulfur (S), or sodium (Na)?
  
• Question #99ddd
  
• What is the perimeter of a triangle with corners at `(7 ,3 )`, `(9 ,5 )`, and `(3 ,3 )`?
  
• How do you divide `( 2i+5) / ( -7 i + 7 )` in trigonometric form?
  
• Question #8f0bd
  
• How do you find the domain of `g(x)= x/(x^2-5x)`?
  
• What is the domain and range of `(x+3)/(x^2+9)`?
  
• Question #43205
  
• Question #529dd
  
• Question #83e6f
  
• How do you integrate `int (x-3x^2)/((x+9)(x-5)(x-7))` using partial fractions?
  
• How do you simplify `(3a^4b^2)^3`?
  
• How do you differentiate `y=x^-2cosx-4x^-3`?
  
• Question #2ce41
  
• How many ways can 4 students be arranged in a row?
  
• How do you find the tangent line of `f(x) = 3x/sinx^2` at x=5?
  
• How do you find the equation of the tangent line to the curve `y = x sin x` at the point where x = π/2?
  
• How do you find the domain and range of `y=x^2 - 5`?
  
• Question #93e1c
  
• Question #29aac
  
• Question #e6ebb
  
• Question #e74c7
  
• A model train, with a mass of `6 kg`, is moving on a circular track with a radius of `2 m`. If the train's rate of revolution changes from `2 Hz` to `6 Hz`, by how much will the centripetal force applied by the tracks change by?
  
• IUPAC name of CHF2CBrClF?
  
• Question #3ad94
  
• Question #03070
  
• Are there chemical formulas for singular genes within DNA?
  
• Question #f61b1
  
• Question #723f7
  
• Question #b1223
  
• Question #e461c
  
• Question #9fd43
  
• A balanced lever has two weights on it, the first with mass `14 kg` and the second with mass `9 kg`. If the first weight is `2 m` from the fulcrum, how far is the second weight from the fulcrum?
  
• How do you multiply `e^(( pi )/ 8 i) * e^( 3 pi/2 i )` in trigonometric form?
  
• How do you find the antiderivative of `f(x)=8x`?
  
• Two objects have masses of `9 MG` and `5 MG`. How much does the gravitational potential energy between the objects change if the distance between them changes from `500 m` to `20 m`?
  
• Two objects have masses of `4 MG` and `8 MG`. How much does the gravitational potential energy between the objects change if the distance between them changes from `150 m` to `450 m`?
  
• A box with a mass of 14.8 kg sits on the floor. How high would you have to lift box to for it to have a gravitational potential energy of 355 J?
  
• A solid disk, spinning counter-clockwise, has a mass of `7 kg` and a radius of `8 m`. If a point on the edge of the disk is moving at `2 m/s` in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?
  
• What are some common mistakes students make with isotope notation?
  
• An electric toy car with a mass of `4 kg` is powered by a motor with a voltage of `2 V` and a current supply of `7 A`. How long will it take for the toy car to accelerate from rest to `2 m/s`?
  
• A charge of `24 C` passes through a circuit every `6 s`. If the circuit can generate `12 W` of power, what is the circuit's resistance?
  
• A charge of `24 C` passes through a circuit every `6 s`. If the circuit can generate `12 W` of power, what is the circuit's resistance?
  
• An electric toy car with a mass of `3 kg` is powered by a motor with a voltage of `7 V` and a current supply of `1 A`. How long will it take for the toy car to accelerate from rest to `5/3 m/s`?
  
• A charge of `24 C` passes through a circuit every `12 s`. If the circuit can generate `36 W` of power, what is the circuit's resistance?
  
• How much energy is needed to power an electric vehicle?
  
• An electric toy car with a mass of `15 kg` is powered by a motor with a voltage of `8 V` and a current supply of `3 A`. How long will it take for the toy car to accelerate from rest to `4 m/s`?
  
• A charge of `18 C` passes through a circuit every `12 s`. If the circuit can generate `4 W` of power, what is the circuit's resistance?
  
• A model train with a mass of `2 kg` is moving along a track at `36 (cm)/s`. If the curvature of the track changes from a radius of `6 cm` to `3 cm`, by how much must the centripetal force applied by the tracks change?
  
• Question #dc67c
  
• An electric toy car with a mass of `8 kg` is powered by a motor with a voltage of `9 V` and a current supply of `4 A`. How long will it take for the toy car to accelerate from rest to `8/3 m/s`?
  
• What is `f(x) = int sec^2x- cosx dx` if `f((5pi)/4) = 0`?
  
• How does positron decay work?
  
• How should you write nuclear equations for beta decay?
  
• Given the following chart, what will the rock contain after 40.000 years or 2 half-lives?
  
• What is the daughter nucleus that is produced when Uranium-235 undergoes alpha decay?
  
• How many neutrons are in an atom of `"_86^222Rn`?
  
• What is the wavelength for radio waves with frequency `3 times 10^9`?
  
• A charge of `1 C` is at `(3,-2)` and a charge of `-3 C` is at `( -4,-1)`. If both coordinates are in meters, what is the force between the charges?
  
• Two charges of `-2 C` and `6 C` are positioned on a line at points `3` and `4`, respectively. What is the net force on a charge of `-5 C` at `0`?
  
• A ball with a mass of `2 kg` moving at `3 m/s` hits a still ball with a mass of `10 kg`. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
  
• Question #a7773
  
• What force will a proton experience in a uniform electric field whose strength is `2.00 * 10^5` newtons per coulomb?
  
• Why is it inaccurate to say "CO is 50 percent oxygen"?
  
• How do you integrate `int dx`?
  
• What is the moment of inertia of a pendulum with a mass of `7 kg` that is `3 m` from the pivot?
  
• A charge of `24 C` passes through a circuit every `18 s`. If the circuit can generate `16 W` of power, what is the circuit's resistance?
  
• An electric toy car with a mass of `2 kg` is powered by a motor with a voltage of `9 V` and a current supply of `7 A`. How long will it take for the toy car to accelerate from rest to `3/2 m/s`?
  
• A projectile is shot from the ground at an angle of `( pi)/3` and a speed of `7 m/s`. Factoring in both horizontal and vertical movement, what will the projectile's distance from the starting point be when it reaches its maximum height?
  
• A spring with a constant of `6 (kg)/(s^2)` is lying on the ground with one end attached to a wall. An object with a mass of `8 kg` and speed of `5 m/s` collides with and compresses the spring until it stops moving. How much will the spring compress?
  
• How do you differentiate `f(x)=(cosx-x)/(sin3x-x^2)` using the quotient rule?
  
• How do you solve `4\cos x = 1+ 2\cos x`?
  
• What does it mean to say Kepler's laws are empiracle in nature?
  
• How do you find the derivative of `y= cos^3 w + cos(w^3)`?
  
• How do you find all zeros of `g(t)=t^5-6t^3+9t`?
  
• A solid disk, spinning counter-clockwise, has a mass of `12 kg` and a radius of `6 m`. If a point on the edge of the disk is moving at `8 m/s` in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?
  
• If the tangent line to `y = f(x)` at `(4,3)` passes through the point `(0,2)`, Find `f(4)` and `f'(4)`? An explanation would also be very helpful.
  
• A model train, with a mass of `8 kg`, is moving on a circular track with a radius of `1 m`. If the train's rate of revolution changes from `5/8 Hz` to `5/4 Hz`, by how much will the centripetal force applied by the tracks change by?
  
• A model train with a mass of `4 kg` is moving along a track at `8 (cm)/s`. If the curvature of the track changes from a radius of `54 cm` to `27 cm`, by how much must the centripetal force applied by the tracks change?
  
• A model train, with a mass of `6 kg`, is moving on a circular track with a radius of `4 m`. If the train's kinetic energy changes from `24 j` to `48 j`, by how much will the centripetal force applied by the tracks change by?
  
• How do you differentiate `y=(v^3-2vsqrtv)/(v)`?
  
• How do you multiply and simplify `\frac { 12} { 5x } \times \frac { x ^ { 3} } { 12x }`?
  
• Question #2019c
  
• What is the oxidation number of oxygen in peroxides?
  
• How do you determine whether the sequence `1/8, 1/4, 1/2, 1,...` is geometric and if it is, what is the common ratio?
  
• Given the specific heat of lead is 0.129 J/g`*`K and that it takes 93.4 J of energy to heat a sample of lead from 22.3°C to 40.°C, how do you find the mass of the lead.?
  
• How do you graph `y=4x-12` using intercepts?
  
• What is the spectroscopic method of analysis?
  
• How do you solve `\log _ { 9} ( 2x + 5) = \log _ { 9} 5x`?
  
• How do you evaluate `arcsin(0)` without a calculator?
  
• How do you find the derivative of `f(x)=2x^3-x^2+3x`?
  
• A balanced lever has two weights on it, the first with mass `5 kg` and the second with mass `8 kg`. If the first weight is `4 m` from the fulcrum, how far is the second weight from the fulcrum?
  
• What is the second derivative of `f(x)=-csc^2x`?
  
• What is the slope and y-intercept of the line `4x-5y=20`?
  
• When 0.500 mole of sodium is produced according to the reaction `2NaN_3(s) -> 3N_2(g) + 2Na(s)`, how many moles of nitrogen gas are also produced?
  
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