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1. physics help please?

...t² = ½*9.81*( 2*1.035e-8)² = 2.10e-15 m Note this is *four times* the height change for 1m So the height change...

1 Answers · Science & Mathematics · 21/11/2020

2. How does the right-hand rule work to find the direction of a moving particle?

...*sinΘ and the direction using the RHR (on a positive charge). Note that when parallel, sinΘ = 0 (zero force), and when perpendicular, sinΘ = 1...

1 Answers · Science & Mathematics · 29/10/2020

3. Help with this dynamics physics problem?

At the bottom of the loop, add gravity to the centripetal acceleration; at the top. subtract. centripetal a = v²/r = (215m/s)² / 1700m = 27.2 m/s² (a) bottom F = 65kg * 37m/s² = 2404 N ≈ 2400 N (b) top F = 65kg * 17.4m/s² = 1130 N ≈ 1100 N...

1 Answers · Science & Mathematics · 26/10/2020

4. What is the force applied on a magnetic bob falling through an aluminum tube?

...0.29N upwards. which I guess is the required answer. ( Note that the *total* force on the magnet is (magnet's weight - 0.29N...

2 Answers · Science & Mathematics · 25/10/2020

5. A 52kg woman jogs up a hill in 24s. Calculate the power the woman exerts if the hill is 18m high.?

You got the formula correct ! However, note m= mass. so use only 52 kg

2 Answers · Science & Mathematics · 06/10/2020

6. A sled is at the top of a hill which makes an 18 degree angle with the horizontal. The hill's height is 25m. Find the sled's speed as it ?

...bottom: mgh = ½mv² v = √(2gh) = √(2 * 9.8m/s² * 25m) = 22 m/s Note that the skier's mass and the angle of the hill are irrelevant. The...

1 Answers · Science & Mathematics · 01/10/2020

7. Physics question ?

... conventional current. I've updated my answers. Note , your diagrams are not in alphabetical order – I've...

1 Answers · Science & Mathematics · 26/09/2020

8. Physics Help!?

a) time to complete race: red: tr = d / v = 20m / 5m/s = 4 s blue: tb = √(2s/a) = √(2*20m / 4m/s²) = 3.16 s so the blue ball finishes first, in 3.16 s, at which time the red ball is x = 20m - 5m/s*3.16s = 4.2 m behind b) X = ½*4m/s²*(4 s)² - 20m = 12 m separation...

1 Answers · Science & Mathematics · 24/09/2020

9. Whats the current through R1 and R2 ... and whats the total resistance?

...gt; 1 A We know that through R₃ = 50/100 => 0.5 A Note : total current 1 + 1 + 0.5 = 2.5 A :)>

6 Answers · Science & Mathematics · 24/08/2020

10. The signal from a 103.9MHz FM radio station reflects off a building 400m away, effectively creating 2 sources of the same signal. ?

...= 6500m m = 2 lambda = c / f =  (3.00 x 10^8) / (103.9 x 10^6) = 2.887 m Note that for m=1 we get distance between two adjascent antinodal lines where one ...

1 Answers · Science & Mathematics · 10/08/2020