grey
Newest questions and responses by grey
Math
these are the ages of the starting players on Aaron's basketball team what is the average (mean) age of the team Jon  8 Jim  9 Bill  6 Bob 8 aaron 9 A 8 years B 9 years C 8 1/2 years D 6 1/2 years E 7 years My answer is B
asked on October 13, 2017 
Math
Trey is ordering one sandwich one fruit and one drink for lunch the sandwich fruit and drink choices are shown Sandwich  turkey fruit choices  apple or orange drink choices  juice milk or water Which tree diagram shows all of the possible outcomes A 
asked on October 13, 2017 
Math
A baker uses 4 berries for every 1 muffin. which equation can be used to find the number of berries, b, needed to make m muffins? A. b = 4/m B. b = 4m C. b = 1/4m D. b = m + 4
asked on October 13, 2017 
chemistry
what is a sigma bond
asked on November 6, 2014 
chemistry
a 111.4mg ore sample containing iro with acid , filtered and diluted to 200.0ml in volumetric flask. a 1000ml aliquot is transferred to a 100.ooml volumetric flask containing hrdroxylamine hydrochloride, sodium acetate and 1,10 phenanthroline and diluted
asked on November 6, 2014 
Biology check my answers
Please check to see if my answers are right: we need to list the 6 kingdoms with their characteristics and an example each Eubacteria "true bacteria": bacilli Monera prokaryote ,: Cyanobacteria Protista single cell, true nucleus :amoeba Plantae
asked on October 18, 2014 
Math radical equations
Please show me how to do these step by step because I have a test tomorow and I need to understand how to do these questions : 1. M1 under the square root sign +5= m2 2. 3n+10 under the square root = n+4 3. K9 under the square root  (k under square
asked on October 8, 2014 
physics
The mass of an atom can be determined by ionizing it and accelerating it through a known electric field followed by a known magnetic field. The ion’s circular path is then measured. Calculate the mass of a chlorine anion of charge 3.20 × 10−19 C if it
asked on June 9, 2014 
physics
Two straight and parallel wires of length 1.0 m carry a current — the first carries a current of 9.0 A while the other wire carries a current of 4.0 A. What distance must separate the two straight and parallel copper wires if the force between them is to
asked on June 9, 2014 
physics
Two straight conductors are 15 cm apart. If one conductor has a current of 12 A and the other has a current of 18 A, calculate the magnetic field at a point midway between the two conductors. The current in both conductors is flowing in the same direction.
asked on June 9, 2014 
physics
2.00 m long straight copper wire has a current of 8.0 A in it as it passes through a magnetic field. The magnitude of the force on the conductor is 2.00 N. The angle between the current and the magnetic field is 45°. What is the magnitude of the uniform
asked on June 9, 2014 
physics
Three identical point charges A, B, and C are located in the shape of an equilateral triangle with sides of length 15 cm. What is the net force on B if each charge has a magnitude of −5.0 × 10−3 C?
asked on June 8, 2014 
physics
Energy & Momentum Calculations Assessment Answer the following questions. A 1.0 kg puck sliding at 15 m/s along some horizontal frictionless ice strikes and compresses a horizontal spring attached to one end of the ice rink. If the spring has a constant of
asked on June 8, 2014 
physics
An electron reaches a speed of 3.0 × 107 m/s when released beside the negative plate within a parallel plate accelerator with a gap of 15.0 cm. If the mass of an electron is 9.11 × 10−31 kg, what is the potential difference between the plates?
asked on June 8, 2014 
physics
The charge on two pith balls can be calculated by knowing their masses and observing the angle of separation between the balls. If both balls are equally charged and they are suspended by strings that are 1.0 m long, calculate that charge. (mass for both
asked on June 7, 2014 
physics
Using that velocity, and the information from above, compare the total momentum just before the collision with the total momentum after the collision. (again let the masses of the balls be m) , it is a lab question , i was just wondering what formula to
asked on June 7, 2014 
physics
Using the data from Step #3 and the velocity found above, compare the gravitational potential energy of the ball at the top of the incline, with the kinetic energy of the ball just before it leaves the table. (you do not need to know the mass, just let it
asked on June 7, 2014 
physics
Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.
asked on June 6, 2014 
physics
How much additional energy is needed to fire a 7.2 × 10^2 kg weather monitor on the earth’s surface to a height of 120 km above the earth? (rE = 6.38 × 10^6 m, ME = 5.98 × 10^24 kg) Assume that the weather monitor rises to that height, stops, and
asked on June 6, 2014 
physics
The gravitational field strength of an unknown planet is 15.5 N/kg on its surface. Calculate the value of g if the planets mass and radius were both doubled.
asked on June 6, 2014 
physics
Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 10^7 m.
asked on June 6, 2014 
physics
Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 107 m.
asked on June 6, 2014 
physics
What is the minimum speed required to simulate artificial gravity?
asked on June 5, 2014 
physics
A 0.50 kg cue ball makes a glancing blow to a stationary 0.50 kg billiard ball. After the collision the cue ball deflects with a speed of 1.2 m/s at an angle of 30.0° from its original path. Calculate the original speed of the cue ball if the billiard
asked on June 5, 2014 
physics
A bullet of mass 45 g is fired at a speed of 220 m/s into a 5.0 kg sandbag hanging from a string from the ceiling. The sandbag absorbs the bullet and begins to swing. To what maximum vertical height will it rise?
asked on June 5, 2014 
physics
A 0.50 kg cue ball makes a glancing blow to a stationary 0.50 kg billiard ball. After the collision the cue ball deflects with a speed of 1.2 m/s at an angle of 30.0° from its original path. Calculate the original speed of the cue ball if the billiard
asked on June 5, 2014 
physics
alculate the final speed of a 1500 kg roller coaster if it has an initial speed of 16 m/s but reduces its elevation by 8.6 m by coasting down a frictionless incline.
asked on June 5, 2014 
physics
During the Olympic ice competition, Boris (m = 75 kg) glides at 1.8 m/s to a stationary Juliette (52 kg) and hangs on. How far will the pair slide after the collision if the coefficient of kinetic friction between the ice and their skates is .042?
asked on June 5, 2014 
physics
A 1.0 kg puck sliding at 15 m/s along some horizontal frictionless ice strikes and compresses a horizontal spring attached to one end of the ice rink. If the spring has a constant of 35 N/m, what is the maximum compression of the spring?
asked on June 5, 2014 
physics
A collision in Phystown is being analyzed by the O.P.P. accident analysis team. A 1000 kg Toyota known to be moving at 65 km/h [W] collided at an intersection with a 3000 kg SUV moving [N]. After the collision, the two vehicles "stuck" together and the
asked on June 5, 2014 
physics
A horizontal spring with spring constant of 120 N/m is compressed a distance of 0.25 m and placed in front of a ramp angled at 30° above the horizontal. A 1.5 kg ball is placed in front of it and released. How far will the ball roll up the 30° ramp?
asked on June 4, 2014 
physics
A 2.2 kg bowling ball is dropped vertically from a height of 1.5 m onto a long compression spring (k = 150 N/m) placed vertically underneath it. What is the maximum compression of the spring?
asked on June 4, 2014 
physics
A 2.0 kg mass is fastened to a spring with force constant of 45 N/m. The mass is held motionless by a student at a position 15 cm below the spring's natural unstretched position. When the ball is released, what is the Fnet acting on it? What is the
asked on June 4, 2014 
physics
A 55 kg skateboarder accelerates down a ramp and hits the pavement moving at 5.6 m/s. If the pavement has a coefficient of friction of 0.11, how far will skateboarder glide before coming to a stop?
asked on June 4, 2014 
physics
In a rescue scene during the 911 crisis, a helicopter of mass 6000 kg accelerates upwards at the rate of 0.50 m/s2 while lifting a 2500 kg piece of concrete. What is the upward force exerted by the rotors of the helicopter? What is the tension in the cable
asked on June 4, 2014 
physics
A ball on the end of a string is moving in a horizontal circle. If the centripetal acceleration of the ball is 12 m/s2, while it is travelling at 3.0 m/s, what would the acceleration be if its speed increased to 4.0 m/s. Assume that the radius of rotation
asked on June 3, 2014 
physics
A fisherman who lives in a high rise apartment building in Toronto, weighs a fish on a spring scale and records a 11.2 N reading. He reweighs the fish while he is in his elevator and records a reading of 13.1 N. What is the acceleration of the elevator at
asked on June 3, 2014 
physics
Sarah is pushing a 10 kg buggy and exerts a force of 100 N along the handle. If the handle is elevated at 37° to the horizontal, determine the component of the force that will move the buggy forward. If a frictional force of 60 N exists as she pushes it
asked on June 3, 2014 
physics
Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.
asked on June 3, 2014 
physics
The above graph represents the motion of two vehicles: A and B What is the acceleration of vehicle A during the first 5.0 s? Calculate the distance between vehicle A and B after 6.0 s? What is the instantaneous acceleration of vehicle A at the 10.0 s mark?
asked on June 3, 2014 
physics
An airplane requires 420 m of runway to take off from an airstrip. If the plane starts from rest and it takes 32 s to lift off, with what velocity does it leave the ground? What was the average acceleration of the plane?
asked on June 3, 2014 
physics
Jack is driving with a pail of water along a straight pathway at a steady 25 m/s when he passes Jill who is parked in her minivan waiting for him. When Jack is beside Jill, she begins accelerating at the rate of 4.0 × 10−3 m/s2 in the same direction
asked on June 3, 2014 
physics
A lifeguard who can swim at 1.2 m/s in still water wants to reach a dock positioned perpendicularly directly across a 550 m wide river. If the current in the river is 0.80 m/s, how long will it take the lifeguard to reach the dock? If instead she had
asked on June 3, 2014 
Physics
Two cars are traveling along a straight line in the same direction, the lead car at 22 m/s and the other car at 34 m/s. At the moment the cars are 59 m apart, the lead driver applies the brakes, causing the car to have a deceleration of 1.5 m/s 2 . How
asked on September 25, 2011 
physics
A bus slows down uniformly from 65.0 km/h to 0 km/h in 20.0 s. How far does it travel before stopping? Answer in units of m
asked on September 25, 2011 
math
A card is drawn at random from an ordinary deck of playing cards. Find the following odds. A. Odds in favor of drawing a 5,6,7 B. Odds against drawing a king, queen, jack, or ace D.Odds against drawing an even numbered (2,4,6,8,10)card. Can I get some help
asked on March 25, 2010 
math
How is the expected outcome determined in a discrete distribution? I do not understand this question. Could someone please help me.
asked on March 22, 2010

Math
What about Widowmaker?
posted on December 11, 2018 
Math
Its A.
posted on October 13, 2017 
Math
my answer is B
posted on October 13, 2017 
Math radical equations
Oh thank u so much:) hopefully I can pass the test!
posted on October 8, 2014 
physics
do i solve for vf in the vf=vi+at equation , then put thr average velocity ?
posted on June 7, 2014 
Physics
try kx=Ffmgh , then solve for h , (its an idea)
posted on June 6, 2014 
physics
sin(30) = sin(a) (.5)(1.6) (1.2)(.5) sin(30)(.6) = sin(a)(.8) sin(a)= (sin(30)(.6))/.8 sin(a)= .375 a= 22.024º Therefore, b= equals: 180º 22.024º 30º = 127.976 sin(30) = sin(127.976) (.5)(1.6) (.5)(v) sin(30)(.5)(v) = sin(127.976)(.5)(1.6) v =
posted on June 5, 2014 
physics
what mass do i use?
posted on June 5, 2014 
physics
i don't know if should use , 1/2mv^2=kx to solve it or not
posted on June 5, 2014 
physics
is this a conservation problem?
posted on June 5, 2014 
math
40 meters. if 1m = 2.5% then 2.5% * 40 = 100. so 1 * 40 = 40 meters
posted on September 25, 2011