linds

Most popular questions and responses by linds
  1. physics please help!!

    A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for

    asked on March 27, 2012
  2. Physics please help!

    An object is moving along a straight line and the uncertainty in its position is 1.1 m. (a) Find the minimum uncertainty in the momentum of the object. (b) Find the minimum uncertainty in the object's velocity, assuming that the object is a golf ball (mass

    asked on April 21, 2012
  3. Physics

    An airplane flies at airspeed (relative to the air) of 470 km/h . The pilot wishes to fly due North (relative to the ground) but there is a 64 km/h wind blowing Southwest (direction 225◦). In what direction should the pilot head the plane (measured

    asked on September 8, 2015
  4. AP CHEM!

    IM SO CONFUSED PLEASE HELP! H2 +CO2-->H2O + CO When H2 is mixed with CO2 at 2,000K, equilibrium is achieved according to the equation above. In one experiment, the following equilibrium concentrations were measured. [H2]= 0.20mol/L [CO2]= 0.30mol/L

    asked on April 3, 2007
  5. physics

    A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 680 nm. Determine the angle that locates the first dark fringe when the width of the slit is each of the following. (b) 1.20 10-6 m

    asked on April 15, 2012
  6. Physics please help!

    A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 680 nm. Determine the angle that locates the first dark fringe when the width of the slit is each of the following. (b) 1.20 x 10^-6 m

    asked on April 15, 2012
  7. physics

    A bungee jumper, whose mass is 87 kg, jumps from a tall platform. After reaching his lowest point, he continues to oscillate up and down, reaching the low point two more times in 8.5 s. Ignoring air resistance and assuming that the bungee cord is an ideal

    asked on November 15, 2009
  8. Physics Help!!

    A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

    asked on March 21, 2012
  9. physics

    A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

    asked on March 21, 2012
  10. physics

    A baseball pitcher throws a baseball with a speed of 48 m/s . In throwing the baseball, the pitcher accelerates it through a displacement of about 3.5 m, from behind the body to the point where it is released how long was it in the air before returning to

    asked on January 21, 2016
  11. physics

    Two stars are 3.80 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.19 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

    asked on April 15, 2012
  12. trig

    express this in sinx (1/ cscx + cotx )+ (1/cscx- cotx) i got 2sinx is that right?? and B) express in cosx problem: is 1 + cotx/cscx - sin^2x i get to the step of 1 + cos-sin^2x and im stuck..help! (1/cscx + cotx) + (1/cscx - cotx) = (sinx + cosx/sinx) +

    asked on March 28, 2007
  13. Physics

    In a single-slit diffraction pattern on a flat screen, the central bright fringe in 1.0 cm wide when the slit width is 4.70 10-5 m. When the slit is replaced by a second slit, the wavelength of the light and the distance to the screen remaining unchanged,

    asked on February 3, 2010
  14. physics

    A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

    asked on March 21, 2012
  15. science

    Danny sails a boat downstream. The wind pushes the boat along at 21 km/hr. The current runs downstream at 15 km/hr. What is the actual velocity of the boat

    asked on February 7, 2012
  16. physics

    The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b)

    asked on April 10, 2012
  17. Physics

    A tow truck is pulling a car out of a ditch by means of a steel cable that is 10.2 m long and has a radius of 0.50 cm. When the car just begins to move, the tension in the cable is 870 N. How much has the cable stretched? COnstant for Steel cable Y=2.0e11

    asked on November 21, 2009
  18. precal!

    Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign. I get 9cos^2x + 16sin^2x +16cos^2x + 9sin^2x now i know that sin^2 equals 1-cos^2....so would that be 9cos^2x + 17-cos^2x+16cos^2+ 10cos^2x? if not please help..and

    asked on March 28, 2007
  19. calculus

    express in sinx 1 1 ---------- + -------- cscx + cotx cscx - cotx and express in cosx 1 + cot x ------- - sin^2x cscx = 1/sinx so what do i do w. that extra one on the top!?? im so confused cscx Your fractions aren't lining up. This question is also not

    asked on March 27, 2007
  20. Physics please help!

    The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b)

    asked on April 10, 2012
  21. physics!

    The image produced by a concave mirror is located 27 cm in front of the mirror. The focal length of the mirror is 13 cm. How far in front of the mirror is the object located?

    asked on April 2, 2012
  22. physics please help!!

    A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for

    asked on March 27, 2012
  23. physics

    Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

    asked on March 27, 2012
  24. physics please help!!

    Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder.

    asked on March 26, 2012
  25. physics please help!!

    1. A 26.0-Ω resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 150-V generator. (a) At what frequency is the current a maximum? 2.A series circuit contains only a resistor and an inductor. The voltage V of the generator

    asked on March 21, 2012
  26. physics

    A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 20 Ω and L = 2.8 mH, find the frequency at which the current is one-fifth its value at zero frequency?

    asked on March 20, 2012
  27. physics

    Suerat made paintings in which separate dots of color are placed close together on the canvas, and from a distance they merge in the eye to form an image. Consider such a painting with the dots in the painting separated by 1.7 mm and assume that the

    asked on February 3, 2010
  28. Calculus

    find derivitive of 1/square root of x 1/square root of x = x^(-1/2) The derivative is -1/2 x^(-3/2) can you keep going on the problem to not have negative exponents? You can also use that the derivative of 1/f(x) is given by: -f'(x)/[f(x)]^2 If you take

    asked on January 18, 2007
  29. Physics please help!

    Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

    asked on April 22, 2012
  30. physics!

    Light is incident from air onto the surface of a liquid. The angle of incidence is 50.7°, and the angle of refraction is 34.5°. At what angle of incidence would the reflected light be 100% polarized?

    asked on April 2, 2012
  31. physics so confused

    1. A 26.0-Ω resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 150-V generator. (a) At what frequency is the current a maximum?

    asked on March 21, 2012
  32. English

    Grandma said yes, we need more apple juice. Correct for capitalization and punctuation.

    asked on February 18, 2008
  33. physics word problem

    why are lightweight tires preferred over lightweight frams in bicycle racing?

    asked on October 17, 2007
  34. statistics

    The proportion of adults in the US with basic literary skills is 43%. If a hypothesis test is performed on this, how should you (in terms of the claim) interpret a decision that rejects the null hypothesis?

    asked on June 13, 2012
  35. physics

    A converging lens (f = 12.6 cm) is held 8.55 cm in front of a newspaper, the print size of which has a height of 2.10 mm. (a) Find the image distance (in cm), (b) The height (in mm) of the magnified print.

    asked on April 10, 2012
  36. physics

    In a series circuit, a generator (1254 Hz, 13.8 V) is connected to a 15.5-Ω resistor, a 4.25-µF capacitor, and a 5.32-mH inductor. Find the voltage across each circuit element. VR = VC = VL =

    asked on March 20, 2012
  37. physics problem

    why are lightweight tires preferred over lightweight frams in bicycle racing?

    asked on October 16, 2007
  38. physics

    why are lightweight tires preferred over lightweight frams in bicycle racing?

    asked on October 16, 2007
  39. factoring cubes

    how to factor x^3-27 well since 27 is a perfect cube and so is x^3 wouldn't the answer be x-3? no, its something like (2x-3)(?x^2+?X+?) i don't know how to figure all the parts out. Here's the format for the difference between two cubes: (a - b)(a^2 + ba +

    asked on January 18, 2007
  40. math

    e^(-X/2)=12 do i bring the (-x/2) down by ln? how do i procede after that? thanks e^(-x/2) = 12 (-x/2) = ln12 -x = ln12 * 2 x = -(ln12 * 2) can you a also help me with this one? x^2ln(x)=ln(x) thanks x^2 = ln(x)/ln(x) x^2 = 1 x = +/-1

    asked on October 25, 2006
  41. Math

    calculus help needed example: sin-1(-1/2) how do you figure this out? The sin^-1 means the arcSin, or the angle whose sine is ... so sin^-1(1/2) is the angle whose sine is -.5, which is -30 degrees. In your calculator, put in -.5, then press INV sin. so as

    asked on October 25, 2006
  1. Linds

    I just realized I got my name and the subject mixed up...I also realized I don't have a default case in my switch statement. Not sure if that will change anything, but I'll try it.

    posted on November 29, 2017
  2. physics

    10.3 m / 8.0 m/s =1.287 seconds

    posted on September 8, 2015
  3. Physics please help!

    Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

    posted on April 22, 2012
  4. physics please help!!

    Can you plug in the numbers for #1 please? I'm still a little confused.

    posted on March 21, 2012
  5. biological science

    cant move cant reproduce do not react to heat, cold ect do not participate in excretion

    posted on November 15, 2009