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Homework Statement:: I tried google search and I give up. Relevant Equations:: How does output wave of wifi/bluetooth look like? How does output wave of wifi/bluetooth look like?

So how current stays same while voltage repeatedly fluctuates in AC current?

I always find voltage vs time majorly in case of AC current. What about current V time in AC current cases?

I am referring to reverse current in zener breakdown. I am referring to this part.

I understand that Zener Breakdown occurs when the reverse current starts flowing in the junction because of which depletion region entirely vanishes. Can I power things using this reverse current ? Or will it damage the appliance?

Is it Back EMF, Reverse Current, Reverse Saturation current, Backfeeding? If not, tell the difference.

Hair is getting + ve or - ve charged?

Suppose man is traveling in a rocket. if rocket goes up, man feels someone thrusting him down, vice versa. What exactly pulling the man up/down in rocket?

I mean theory part of time machine.

It shows theory of time machine proved, what's the exact point that stopping our scientists to create time machine in reality?

First person position = old first person position + ut Second person position = old second person position + vt

7yr=100% interest 21yr=300% interest Amount=(100+300)%=400%=4 times of principal How 7 years is equal to 100% interest? Why in last step, we added 100% & 300%?

##X = X_0 + v_t## Now how should i proceed?

So New position formula: old position + velocity *time.

How you got ##x = x_0 + 1v## at ## t = 1##?

I understood clearly now. New position will be ##x_vt##.

position should be ##x_0vt##.

Position will be ##vt##

P = 49000; R = 57 1/7%; T = 4 yrs; SI of 2nd year = ? R = 57 1/7% i.e 4/7. i.e Interest/Principle. Principle; 7 corresponds to 49000. After this how to proceed?

How to write equations for this 2 sentences? They didn't mention total distance also.

A and B leave their places and start moving towards each other. If they are 50m apart after both 2 min and 3 mins, how far are their places? I can able to draw a diagram for this problem: Take distance between their places as D Speed of A = x meter /minutes Speed of B = y meter/minutes...

Can you show me another simple approach ?

How boat went upstream for 1 hour only if question clearly says boat goes upstream for 3 hr 30 min? My doubt regarding the way of approach to answer.

Why should we solve this question through references?

A boat goes upstream for 3 hr 30 min and then goes downstream for 2 hr 30 min. If the speed of the current and the speed of the boat in still water are 10/3 kmph and 15/2 kmph respectively, how far from its original position is the boat now? With reference to ground, the water travels...

I able to calculate this 2 things: relative speed of A and B = 3 + 1; 4m/sec Time for meeting for first time in opposite direction = 100/(3+1); 25 sec I can't able to find distance in Meeting for first time for opposite direction.

Give me answers in both cases: meet/coincide in the starting line

B moves at 1 m/sec. The track is 100 m in length. T =100/1 = 100 sec for B to complete one lap on the track. In that time, A will complete 3 laps. So answer will be 100 sec?

Circular track: Both are in same direction.A = 3m/sec, B = 1 m/sec. Circumference of track= 100m. What is the time taken by A & B to reach starting point for first time?

In 8 years, amount becomes 17 times of P. So in 15 years, amount becomes how much? A) This is the shortcut: ##\large \frac{8}{?} = \frac{17-1}{n_{2}-1} → \frac{8}{15} = \frac{16}{n-1} \normalsize → n = 31 \; times ## Is there any wrong in this question statement?

A block of mass ##10kg## rests on a horizontal floor. The acceleration due to gravity is ##9.81 m/s^{2}##. The coefficient of static friction between the floor and the block is ##0.2##. A horizontal force of ##10N## is applied on the block as shown in the figure. The magnitude force of friction...

Acceleration if no friction exist; ##a_{x} = mg.sinθ## Acceleration if friction exist; ##a = g.sinθ - µ_{k}.g.cosθ## (I am not sure whether it is ##μ_{s}## or ##µ_{k}## in this equation) Are these equations correct for sliding block equations?

how can I tell The sum of the forces in either direction is zero ? Good reasons like what?

No need of ## ΣF_{X} = 0## & ##ΣF_{y} = 0## for this sliding block problem? If yes, when to use ##ΣF_{X} = 0## & ##ΣF_{y} = 0## ?

Explain this equation ##Mg.sinθ - μMg.cosθ = ma## ? I know standard sliding block equation: ##w·sinθ – μkN = 0## & ##N – w·cosθ = 0## How to understand ##μ < tan θ##?

Sol: ##Mg.sinθ - μMg.cosθ = ma## ##a = g.sinθ - μg.cosθ## Now ##S = ut + \large\frac{1}{2}\normalsize at^{2}## but ##u = 0## ##t = \large\sqrt\frac{2s}{a} = \sqrt\frac {2s}{gcosθ(tanθ- μ)}## My questions: What is the meaning of " PQ = s" in the question? How ##t = \large\sqrt\frac{2s}{a}...

Problem Statement: Difference between frictional force and force of friction. Relevant Equations: Difference between frictional force and force of friction. Difference between frictional force and force of friction. Are these two terms equal?

##V_{oy} = V_{0}.sinθ = (20 m/sec)(sin 30) = 10 m/sec## ##V_{ox} = V_{0}.cosθ = (20 m/sec)(cos 30) = 17.3 m/sec## ##y = y_{0} + V_{oy}t - \large\frac {1}{2}\normalsize gt^{2}## ##0 = 50 + 10t - 4.9t^{2}## ##0 = 4.9t/6{2} - 10t - 50## ##t = \large\frac {-b±\sqrt {b^{2} - 4ac}}{2a}## ##t =...

##y_{max} = \large\frac{V^{2}sin^{2}θ}{2g}\normalsize + H## (Here ##H## is the height of the cliff.) ##h = \large\frac{V^{2}sin^{2}θ}{2g}##

Why we have to use vectors here? Can't we derive Earth's angular momentum without vectors?

The green dot shows the position of the Earth at the instant the Sun disappears. The distance from the Sun, ##d##, is the Earth's orbital distance and the velocity ##v## is the Earth's orbital velocity. When the Sun disappears the Earth heads off in a straight line at constant velocity as shown...

So Earth has two angular momentum: about its axis and about the sun? I think Earth converts its angular momentum into Linear momentum after sun disappears.

What is ##\vec{r}## & ##\vec{p}## ? Are you telling Earth's angular momentum has nothing to do with Sun or moon?

In this video, around 2:28 He explains Earth maintain its same angular momentum even after sun disappears. I didn't get it. How Earth maintain its same angular momentum even after sun disappears?

Then what is the formula for Max height & ##Y_{max}##?

Horizontal range is ##R = Vcosθ.t##

Time it takes from A to travel to B; ##T = \large\frac{Vsinθ}{g}## Max height object can reach, ##h = \large\frac{V^{2} sin⁡2θ}{g}## Time it takes for for B to travel to C; ##T = \large\sqrt\frac{2y_{max}}{g}## What is the proper formula for ##Y_{max}## for this trajectory?

Just to be clear, it's rotating in the Z-axis (into the page), but moving (due to rolling) in the x-axis. I am confused.. :rolleyes:

What is the meaning of this line "If the interval under consideration is sufficiently brief "?