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linds
Questions and answers by visitors named
linds
Questions (31)
express in sinx
1 1 ---------- + -------- cscx + cotx cscx - cotx and express in cosx 1 + cot x ------- - sin^2x cscx = 1/sinx so
1 answer
681 views
express this in sinx
(1/ cscx + cotx )+ (1/cscx- cotx) i got 2sinx is that right?? and B) express in cosx problem: is 1 +
2 answers
1,305 views
Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under the square root sign.
I get 9cos^2x + 16sin^2x +16cos^2x +
1 answer
594 views
IM SO CONFUSED PLEASE HELP!
H2 +CO2-->H2O + CO When H2 is mixed with CO2 at 2,000K, equilibrium is achieved according to the
7 answers
1,425 views
why are lightweight tires preferred over lightweight frams in bicycle racing?
2 answers
559 views
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
1 answer
836 views
Suerat made paintings in which separate dots of color are placed close together on the canvas, and from a distance they merge in
2 answers
583 views
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
4 answers
1,364 views
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,
1 answer
395 views
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
1 answer
455 views
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)
4 answers
1,300 views
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)
2 answers
549 views
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
4 answers
1,213 views
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
2 answers
646 views
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)
2 answers
545 views
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
1 answer
426 views
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
3 answers
661 views
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding
1 answer
663 views
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding
4 answers
4,083 views
Light is incident from air onto the surface of a liquid. The angle of incidence is 50.7°, and the angle of refraction is
2 answers
599 views
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
3 answers
1,052 views
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)
3 answers
1,241 views
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
1 answer
448 views
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
1 answer
944 views
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
2 answers
664 views
A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 680 nm. Determine the angle
2 answers
1,255 views
A diffraction pattern forms when light passes through a single slit. The wavelength of the light is 680 nm. Determine the angle
1 answer
719 views
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
4 answers
2,468 views
Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50
1 answer
397 views
The proportion of adults in the US with basic literary skills is 43%. If a hypothesis test is performed on this, how should you
1 answer
426 views
A baseball pitcher throws a baseball with a speed of 48 m/s . In throwing the baseball, the pitcher accelerates it through a
4 answers
1,027 views
Answers (2)
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.
Can you plug in the numbers for #1 please? I'm still a little confused.
