Answers created by Miguel F.

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• Question #40068
  
• Question #765eb
  
• What is the equation of the line perpendicular to # y=-(2x)/5-12 # at #x=-1 #?
  
• A model train with a mass of #1 kg# is moving along a track at #6 (cm)/s#. If the curvature of the track changes from a radius of #8 cm# to #9 cm#, by how much must the centripetal force applied by the tracks change?
  
• How do you solve #Csc^2(a/2)=2 Sec(a)#?
  
• A #7 L# container holds #21 # mol and #12 # mol of gasses A and B, respectively. Groups of three of molecules of gas B bind to five molecules of gas A and the reaction changes the temperature from #350^oK# to #420^oK#. How much does the pressure change?
  
• How do you find the domain of f+g given f(x)=3x + 4 and g(x) = 5/(4-x)?
  
• How do you determine if the equation # y = -5(1/3) ^ -x# represents exponential growth or decay?
  
• A triangle has sides A, B, and C. Sides A and B have lengths of 6 and 4, respectively. The angle between A and C is #(7pi)/24# and the angle between B and C is # (13pi)/24#. What is the area of the triangle?
  
• Question #84561
  
• What is the cross product of #<-3 ,-6 ,-3 ># and #<0 ,1 , -7 >#?
  
• Question #9c132
  
• The width of a rectangle is 3 inches less than its length. The area of the rectangle is 340 square inches. What are the length and width of the rectangle?
  
• If y varies inversely as the square of x and y = 8 when x = 2, then what is the value of y when x = -1?
  
• Question #cd6d2
  
• When is an aqueous solution basic? What pH?
  
• Question #d475f
  
• Question #85f29
  
• Question #e4230
  
• What is the axis of symmetry and vertex for the graph # y = -x^2 +4x + 3#?
  
• An object with a mass of #7 kg# is on a surface with a kinetic friction coefficient of # 8 #. How much force is necessary to accelerate the object horizontally at # 4 m/s^2#?
  
• How do you evaluate #e^( ( 13 pi)/12 i) - e^( ( 13 pi)/2 i)# using trigonometric functions?
  
• How are atoms and molecules different?
  
• Question #5235c
  
• Question #85cd9
  
• What is the distance between #(3, –1, 1) # and #(–4, 0, 2) #?
  
• Question #95d67
  
• What is the equation of the parabola that has a vertex at # (-4, 16) # and passes through point # (0,0) #?
  
• Question #a01c7
  
• The velocity of an object with a mass of #3 kg# is given by #v(t)= - t^2 +4 t #. What is the impulse applied to the object at #t= 5 #?
  
• What is the vertex form of #y=4x-x^2#?
  
• How fast will an object with a mass of #24 kg# accelerate if a force # 33 N# is constantly applied to it?
  
• A triangle has sides A, B, and C. Sides A and B are of lengths #7# and #6#, respectively, and the angle between A and B is #(5pi)/8 #. What is the length of side C?
  
• Question #31c98
  
• What is the period of #f(t)=sin( ( 5 t ) /3 ) #?
  
• Given #a+3/4b=2# and #b+3/4a=6#. How do you find #b/a#?
  
• Jack and Jill are driving down a concrete road in a car on a dry day. The car's weight including Jack and Jill is 10,000 N. What is the frictional force between the rubber tire and concrete road?
  
• How do you divide #( 8i+2) / (-i +2)# in trigonometric form?
  
• Two charges of # 2 C # and # 3 C# are positioned on a line at points # -5 # and # 6 #, respectively. What is the net force on a charge of # -8 C# at # -2 #?
  
• How do you factor the trinomial # 14x^2+23xy+3y^2#?
  
• An object with a mass of #5 kg# is on a surface with a kinetic friction coefficient of # 4 #. How much force is necessary to accelerate the object horizontally at # 32 m/s^2#?
  
• A projectile is shot at an angle of #pi/12 # and a velocity of #85 m/s#. How far away will the projectile land?
  
• How can physics help us understand what are the basic building blocks of matter?
  
• What are pendulums used for today?
  
• Why are gears simple machines?
  
• How do adaptive optics work?
  
• In a binary star system, a small white dwarf orbits a companion with a period of 52 years at a distance of 20 A.U. What is the mass of the white dwarf assuming the companion star has mass of 1.5 solar masses? Many thanks if anyone can help!?
  
• What are some examples of the study of motion?
  
• Question #e36fe