Popular questions and responses by Saif
  1. trigonometry

    From the top of a fire tower, a forest ranger sees his partner on the ground at an angle of depression of 40º. If the tower is 45 feet in height, how far is the partner from the base of the tower, to the nearest tenth of a foot? (Detailed explanation

    asked on June 3, 2020
  2. PHY

    . Four identical metal spheres have charges of qA = –8.0 µC, qB =–2.0 µC, qC = +5.0µ C, and qD = +12.0µ C. (a) Two of the spheres are brought together so they touch, and then they are separated. Which spheres are they, if the final charge on each

    asked on February 17, 2013
  3. Physics

    Which of the following statements about Ohm’s Law is true? A. Keeping the same voltage and decreasing resistance decreases the current. B. To increase the current, decrease the resistance. C. Ohm’s law relates power, current and resistance. D.

    asked on January 23, 2017
  4. math

    Three girls shared a cake .A gets 3/8 of the cake , B gets 1/4 of the remainder . How much does C get ?

    asked on October 27, 2017
  5. science

    if a mass of 2.4 g of magnesium is burnt in air, 4.0g of magnesium oxide is formed. 1- what kind of reaction is this ? explain your answer b- what was the mass of oxygen that reacted with the magnesium? explain you answer

    asked on November 4, 2019
  6. calculus

    A satellite is free falling from a distance (d) of the surface of the moon with radius (R), with zero initial velocity. At what rate does the area of the portion of the moon visible to the satellite decrease at a time (t) after the free fall starts? When

    asked on December 2, 2015
  7. physics

    maximum and minimum magnitude of resultant of two vectors r 17 and 7 respectively what is the magnitude of resultant vector when both r perpendicular to each other??

    asked on May 23, 2014
  8. Math

    Suppose an equation that describes the path of a diver when diving off a platform is d = -5t^2 + 10t + 20. Where d is the distance above the water in (feet) and t is the time from the beginning of the dive(seconds). After how many seconds is the diver 25

    asked on May 27, 2013
  9. Statistics

    Suppose that 20% of the students in a college are smokers. A sample of 10 students is randomly selected from this college. What is the probability that at least 3 students in this sample are smokers?

    asked on November 22, 2019
  10. Great Cities Past and Present

    Answer the following questions in a few sentences. Shanghai Questions 1. How did Shanghai merge East and West in the era of colonialism? Who do you think benefited most from the city as it existed at that time? 2. How was Shanghai transformed in the

    asked on March 3, 2018
  11. Physics

    The output voltage and current of a transformer are determined by the A. number of turns in the primary and secondary coils. B. ferromagnetic material of the rings connecting the coils. C. strength of the DC current in the primary coil. D. direction of the

    asked on January 24, 2017
  12. Physics

    Water is falling on turbine at a rate of 6000 kg/min the height of fall is 100 m what is the power given to turbine?

    asked on January 2, 2017
  13. math

    Myrza has three children a.If his oldest child is a girl, what is the probability that all the children are girls ? b.Given at least one of them is a boy, what is the probability of all of them are boys ?

    asked on October 12, 2016
  14. calculus

    the lemniscate revolves about a tangent at the pole find sufaces of the solid generated?

    asked on November 11, 2011
  15. Engineering Mechanics

    A force of 100 N is acting at a point Resolve this force along 300 and 400

    asked on April 22, 2010
  16. math

    k + 9 greater than 12

    asked on September 27, 2009
  1. Great Cities Past and Present

    i need answers to the following question

    posted on March 3, 2018
  2. Math

    a. 2*4*3=24 b. 2*4*3*3*4=288

    posted on October 28, 2016
  3. calculus

    Steve-that is all the given info Damon- no. thanks Eryk i will try it it is an application of derivative

    posted on December 4, 2015
  4. Chemistry

    Well the answer is definitely correct because that is the one selected on the answer sheet. I don't know why though.

    posted on May 28, 2013
  5. math


    posted on March 28, 2013