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Question Number 13054 Answers: 1 Comments: 0

An object is placed between a converging lens and a plane mirror. Explain how two real images of the object may be produced by the system. If the focal length of the lens is 15cm and the object is 20cm from both the lens and the mirror.Calculate the distance of the two images from the lens.. pls help me with this....

Question Number 13049 Answers: 1 Comments: 0

Two charges q_1 = 10 μC and q_2 = 5 μC are placed on the axis at A (10, 0) cm and (20, 0) cm respectively. Determine a position between the two charges where the electric field intensity is 0.

$$\mathrm{Two}\:\mathrm{charges}\:\mathrm{q}_{\mathrm{1}} \:=\:\mathrm{10}\:\mu\mathrm{C}\:\mathrm{and}\:\:\mathrm{q}_{\mathrm{2}} \:=\:\mathrm{5}\:\mu\mathrm{C}\:\:\mathrm{are}\:\mathrm{placed}\:\mathrm{on}\:\mathrm{the}\:\mathrm{axis}\:\mathrm{at}\:\mathrm{A}\:\left(\mathrm{10},\:\mathrm{0}\right)\:\mathrm{cm} \\ $$$$\mathrm{and}\:\left(\mathrm{20},\:\mathrm{0}\right)\:\mathrm{cm}\:\:\mathrm{respectively}.\:\mathrm{Determine}\:\mathrm{a}\:\mathrm{position}\:\mathrm{between}\:\mathrm{the}\:\mathrm{two}\:\mathrm{charges} \\ $$$$\mathrm{where}\:\mathrm{the}\:\mathrm{electric}\:\mathrm{field}\:\mathrm{intensity}\:\mathrm{is}\:\mathrm{0}.\: \\ $$

Question Number 13068 Answers: 2 Comments: 0

If y = (x)^(1/3) Find (dy/dx) from the first principle

$$\mathrm{If}\:\:\:\mathrm{y}\:=\:\:\sqrt[{\mathrm{3}}]{\mathrm{x}}\:\:\:\:\:\mathrm{Find}\:\:\frac{\mathrm{dy}}{\mathrm{dx}}\:\:\mathrm{from}\:\mathrm{the}\:\mathrm{first}\:\mathrm{principle} \\ $$

Question Number 13067 Answers: 0 Comments: 4

Question Number 13040 Answers: 1 Comments: 0

which is heavier,HOT water or COLD water? pls give explanation Thanks

$$\mathrm{which}\:\mathrm{is}\:\mathrm{heavier},\mathrm{HOT}\:\mathrm{water}\:\mathrm{or}\: \\ $$$$\mathrm{COLD}\:\mathrm{water}?\:\:\mathrm{pls}\:\mathrm{give}\:\mathrm{explanation} \\ $$$$ \\ $$$$\mathrm{Thanks} \\ $$

Question Number 13034 Answers: 0 Comments: 4

MrW1 Before we concluded that: Φ=Σ_(x=0) ^m Σ_(y=0) ^n (1−sgn(x−x′)) If you do: Σ_(x=0) ^1 Σ_(y=0) ^1 (1−sgn(x−x′)) =Σ_(x=0) ^1 Σ_(y=0) ^1 (1−sgn(x−((LCM(x,y))/y))) =(1−sgn(0−((LCM(0,0))/0)))+(1−sgn(1−((LCM(1,0))/0)) +(1−sgn(0−((LCM(0,1))/1)))+(1−sgn(1−((LCM(1,1))/1)) =(1−sgn(−((LCM(0,0))/0)))+(1−sgn(1−(0/0))) +(1−sgn(−(0/1)))+(1−sgn(1−(1/1))) =????

$$\mathrm{MrW1} \\ $$$$\: \\ $$$$\mathrm{Before}\:\mathrm{we}\:\mathrm{concluded}\:\mathrm{that}: \\ $$$$\Phi=\underset{{x}=\mathrm{0}} {\overset{{m}} {\sum}}\underset{{y}=\mathrm{0}} {\overset{{n}} {\sum}}\left(\mathrm{1}−\mathrm{sgn}\left({x}−{x}'\right)\right) \\ $$$$\: \\ $$$$\mathrm{If}\:\mathrm{you}\:\mathrm{do}: \\ $$$$\underset{{x}=\mathrm{0}} {\overset{\mathrm{1}} {\sum}}\underset{{y}=\mathrm{0}} {\overset{\mathrm{1}} {\sum}}\left(\mathrm{1}−\mathrm{sgn}\left({x}−{x}'\right)\right) \\ $$$$=\underset{{x}=\mathrm{0}} {\overset{\mathrm{1}} {\sum}}\underset{{y}=\mathrm{0}} {\overset{\mathrm{1}} {\sum}}\left(\mathrm{1}−\mathrm{sgn}\left({x}−\frac{\mathrm{LCM}\left({x},{y}\right)}{{y}}\right)\right) \\ $$$$=\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{0}−\frac{\mathrm{LCM}\left(\mathrm{0},\mathrm{0}\right)}{\mathrm{0}}\right)\right)+\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{1}−\frac{\mathrm{LCM}\left(\mathrm{1},\mathrm{0}\right)}{\mathrm{0}}\right)\right. \\ $$$$+\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{0}−\frac{\mathrm{LCM}\left(\mathrm{0},\mathrm{1}\right)}{\mathrm{1}}\right)\right)+\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{1}−\frac{\mathrm{LCM}\left(\mathrm{1},\mathrm{1}\right)}{\mathrm{1}}\right)\right. \\ $$$$\: \\ $$$$=\left(\mathrm{1}−\mathrm{sgn}\left(−\frac{\mathrm{LCM}\left(\mathrm{0},\mathrm{0}\right)}{\mathrm{0}}\right)\right)+\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{1}−\frac{\mathrm{0}}{\mathrm{0}}\right)\right) \\ $$$$+\left(\mathrm{1}−\mathrm{sgn}\left(−\frac{\mathrm{0}}{\mathrm{1}}\right)\right)+\left(\mathrm{1}−\mathrm{sgn}\left(\mathrm{1}−\frac{\mathrm{1}}{\mathrm{1}}\right)\right) \\ $$$$\: \\ $$$$=???? \\ $$

Question Number 13031 Answers: 1 Comments: 0

MrW1 Going off of Q12883 How many unique angles angles in Z^3 ? What about Z^n ?

$$\mathrm{MrW1} \\ $$$$ \\ $$$$\mathrm{Going}\:\mathrm{off}\:\mathrm{of}\:\mathrm{Q12883} \\ $$$$\: \\ $$$$\mathrm{How}\:\mathrm{many}\:\mathrm{unique}\:\mathrm{angles}\:\mathrm{angles}\:\mathrm{in}\:\mathbb{Z}^{\mathrm{3}} ? \\ $$$$\mathrm{What}\:\mathrm{about}\:\mathbb{Z}^{{n}} ? \\ $$

Question Number 13030 Answers: 0 Comments: 1

Question Number 13029 Answers: 1 Comments: 1

Question Number 13025 Answers: 1 Comments: 1

Question Number 13012 Answers: 0 Comments: 2

Sir. MRV please i need the cubic equation formular. my phone has fault and i just restore it. please help me re send it. i really appreciate your effort sir. God bless you sir.

$${Sir}.\:{MRV}\:\:{please}\:\mathrm{i}\:\mathrm{need}\:{the}\:\mathrm{cubic}\:\mathrm{equation}\:\mathrm{formular}.\:\:\mathrm{my}\:\mathrm{phone}\:\mathrm{has}\:\mathrm{fault} \\ $$$$\mathrm{and}\:\mathrm{i}\:\mathrm{just}\:\mathrm{restore}\:\mathrm{it}.\:\mathrm{please}\:\mathrm{help}\:\mathrm{me}\:\mathrm{re}\:\mathrm{send}\:\mathrm{it}.\:\mathrm{i}\:\mathrm{really}\:\mathrm{appreciate}\:\mathrm{your}\:\mathrm{effort} \\ $$$$\mathrm{sir}.\:\mathrm{God}\:\mathrm{bless}\:\mathrm{you}\:\mathrm{sir}. \\ $$

Question Number 13011 Answers: 1 Comments: 0

lim_(x→∞) [5^x + 5^(3x) ]^(1/x) = ? please help

$$\mathrm{li}\underset{\mathrm{x}\rightarrow\infty} {\mathrm{m}}\left[\mathrm{5}^{\mathrm{x}} \:+\:\mathrm{5}^{\mathrm{3x}} \right]^{\frac{\mathrm{1}}{\mathrm{x}}} \:=\:? \\ $$$$\mathrm{please}\:\mathrm{help} \\ $$

Question Number 13010 Answers: 1 Comments: 0