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- Not sure what I'm doing wrong. I know that Fc= (m)(v^2/r) with: m= 0.0011kg r=0.84/2 Fc=3.9N but when I plug all that into the equation, I'm being told it's wrong. What am I missing?For a Wheatstone bridge with R1 = 432.1 Ω, R2 = 55.2 kΩ, and Rk = 6654.543 Ω, what is Rx ? For a Wheatstone bridge with R2 /R1 = 55, and Rk = 300Ω, what is Rx ?Let À = 3.92i + 4.41j and B = -3.02i + -2.43j. What is the angle between À and B measured in degrees. Note that the angle may be greater than 90 degrees. (I understand the basic steps of the question but I keep getting 115.432. My last step was Cos^-1(2.9/22.588)
- 35 - Since a =3i ̂+2j ̂-k ̂ and b =i ̂+j ̂+3k ̂, what is the result of ( a - b )? A) 2i ̂+5j ̂-2k ̂ B) -3i ̂+6j ̂+1k ̂ C) 4i ̂+3j ̂+2k ̂ D) 2 E) 2i ̂+j ̂-4k ̂Pleas help with part (b), I already try with the answer of 7.46*10^-7 but is incorrect.If Q1 = 3.2 μC, what is Q2? a) 2.55 μCb) 5.6μCc) 3.2 μCd) 9.8 μC
- (3) The Moon is approximately 400,000 km from the Earth. An atom of a certain element has adiameter of 4 X 10-8 cm. Given 1 km = 1,000 m and 1 m = 100 cm, about how many atoms ofthis element can be lined up between Earth and Moon?k = 8.99 x 109 Nm2/C2, me = 9.11 x 10 – 31 kg, e = 1.6 x 10 – 19 C, mp = 1.67 x 10 – 27 kgA certain atom has a radius of 2.7 X 10-1 nm and a mass of 2.21 X 10-22 g. What is the density of the atom? Assume that the atom is a sphere. The volume of a sphere is given by: ?=43??3V=43πr3 where r is the radius and ?=3.14
- If A = 6i + 4j + 3k and B = 2i – 3j – 3k, find: a. A×B b. A ´ B c. The angle between A and Bwhy do they mix x component and y compenent together? i thought you have 2 separate equations one for x and y compenent?Choose the letter of the correct answer. 1) Which list shows the numbers in order from least to greatest a) 3.9 x 10^-2, 3.9 x 10^-3, 9.3 x 10^-3 b) 3.9 x 10^-3, 3.9 x 10^-2, 9.3 x 10^-3 c) 3.9 x 10^-3, 9.3 x 10^-3, 3.9 x 10^-2 d) 9.3 x 10^-3, 3.9 x 10^-3, 3.9 x 10^-2 2) Which of the following is the correct scientific notation for 0.0000935? a) 9.35 x 10^-5 b) 93.5 x 10^-5 c) 9.35 x 10^5 d) 93.5 x 10^5