# Search results for query: *

Yes.
2. ### What does the RF waveform of wifi/bluetooth look like?

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?
3. ### Current vs. Time in AC Current

So how current stays same while voltage repeatedly fluctuates in AC current?
4. ### Current vs. Time in AC Current

I always find voltage vs time majorly in case of AC current. What about current V time in AC current cases?
5. ### Can I power things even after Zener breakdown?

I am referring to reverse current in zener breakdown. I am referring to this part.
6. ### Can I power things even after Zener breakdown?

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?
7. ### Back EMF vs Reverse Currents: What's the Difference?

Is it Back EMF, Reverse Current, Reverse Saturation current, Backfeeding? If not, tell the difference.
8. ### In combing hair, how do I know which one is getting what charge?

Hair is getting + ve or - ve charged?
9. ### What exactly is pulling the man up/down in rocket?

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?
10. ### B What's the exact point about time travel?

I mean theory part of time machine.
11. ### B What's the exact point about time travel?

It shows theory of time machine proved, what's the exact point that stopping our scientists to create time machine in reality?
12. ### How to solve this unsolved time & distance problem?

First person position = old first person position + ut Second person position = old second person position + vt
13. ### Problem regarding simple interest

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%?
14. ### How to solve this unsolved time & distance problem?

##X = X_0 + v_t## Now how should i proceed?
15. ### How to solve this unsolved time & distance problem?

So New position formula: old position + velocity *time.
16. ### How to solve this unsolved time & distance problem?

How you got ##x = x_0 + 1v## at ## t = 1##?
17. ### How to solve this unsolved time & distance problem?

I understood clearly now. New position will be ##x_vt##.
18. ### How to solve this unsolved time & distance problem?

position should be ##x_0vt##.
19. ### How to solve this unsolved time & distance problem?

Position will be ##vt##
20. ### Finding the Simple Interest for a specific year

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?
21. ### How to solve this unsolved time & distance problem?

How to write equations for this 2 sentences? They didn't mention total distance also.
22. ### How to solve this unsolved time & distance problem?

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...
23. ### Why should we solve this question through references to the ground and the water?

Can you show me another simple approach ?
24. ### Why should we solve this question through references to the ground and the water?

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.
25. ### Why should we solve this question through references to the ground and the water?

Why should we solve this question through references?
26. ### Why should we solve this question through references to the ground and the water?

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...
27. ### Calculating Relative Speed & Time to Meet: I Can't Find the Distance

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.
28. ### Circular track problem

Give me answers in both cases: meet/coincide in the starting line
29. ### Circular track problem

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?
30. ### Circular track problem

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?
31. ### Is there anything wrong in this question statement?

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?
32. ### How to solve this block problem?

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}...
38. ### Difference between frictional force and the force of friction

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?
39. ### Is my formulae correct for time of flight in this projectile problem?

##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 =...
40. ### What is the proper formula for ##Y_{max}## for this trajectory?

##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}##
41. ### How is the magnitude of L calculated here?

Why we have to use vectors here? Can't we derive Earth's angular momentum without vectors?
42. ### How is the magnitude of L calculated here?

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...
43. ### How the Earth can maintain its same angular momentum even after the Sun disappears

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.
44. ### How the Earth can maintain its same angular momentum even after the Sun disappears

What is ##\vec{r}## & ##\vec{p}## ? Are you telling Earth's angular momentum has nothing to do with Sun or moon?
45. ### How the Earth can maintain its same angular momentum even after the Sun disappears

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?
46. ### What is the proper formula for ##Y_{max}## for this trajectory?

Then what is the formula for Max height & ##Y_{max}##?
47. ### What is the proper formula for ##Y_{max}## for this trajectory?

Horizontal range is ##R = Vcosθ.t##
48. ### What is the proper formula for ##Y_{max}## for this trajectory?

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?
49. ### What are these two: ##L_{i}## & ##L_{f}##?

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:
50. ### How ##L_{0} = L_{f}##?

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