# Yahoo Web Search

1. ### Determine the Speed of the Block After Collision?

Both kinematics and conservation of energy lead to an impact speed of v = √(2gh) = √(2g*2r) = √(2*9.8m/s²*2*0.1300m) = 2.257 m/s conserve momentum: 8.70kg * 2.257m/s = 8.70kg * -0.4332 * 2.257m/s + 13.200kg*V where V is the speed of the block after the collision. V = 0.8433 m/s Hope this...

1 Answers · Science & Mathematics · 09/11/2020

2. ### A 1.3 kg ball at the end of a 1.2 m string swings in a vertical plane. At its lowest point the ball is moving with a speed of 14 m/s.?

...2*1.2m = 149 m²/s² → v = 12 m/s b) T = m*(v²/ r ± g) at bottom, T = 1.3kg * (14²/1.2 + 9.8)m/s² = 225 ...

2 Answers · Science & Mathematics · 18/11/2020

3. ### PHYSICS Circular movement ?

...210 rad = -2.65 rad = -152º using the usual convention magnitude v = ω r = 42rad/s * 47m = 1974 m/s (units of "meters" assumed...

2 Answers · Science & Mathematics · 05/11/2020

...force of tension acts tangent to the pulley and thus the angle between T and R is 90 degrees and the sin(90) is one. =>T x 0.8...

1 Answers · Science & Mathematics · 05/11/2020

5. ### find the value of the resistor ( R ) and the power of the 300v supply by using Kirchhoff laws.?

...2 = 40 voltsthat means V2 = 180–40 = 140 voltsVoltage across R is 300–140 = 160 vcurrent thru R4 = 140/30 = 4.667 amps current...

1 Answers · Science & Mathematics · 06/11/2020

6. ### Physics Help, thank you! :)?

...same, then a³ = (4π/3)r³ where a is the cube side length and r is the sphere's radius a = 1.612r area of the sphere is 4π...

1 Answers · Science & Mathematics · 03/11/2020

7. ### 9.4 ± 1.1 ohms. What will be the absolute uncertainty in case of lg R ?

log 9.3 is 0.91907809237607390383276035202726 log 10.5 is 1.0211892990699380727935052671233 Take the difference

2 Answers · Science & Mathematics · 03/11/2020

8. ### In a table the resistance values are as follows:     R /10*3 ohm 1) 9.4 2) 5.9 does this mean the R values equals 0.00094 and so on?

No. I expect that table has (or should have) R /10^3. It means that the R value, divided by 1000 ohms, is 9.4. Therefore, R = 9400 ohms.

1 Answers · Science & Mathematics · 03/11/2020

9. ### Physics help?

mg tanθ = mv²/ r v²= r /m * mg tanθ, but mass cancels v = √(rg tanθ) v = √140*9.80665 * 0.3249 = 21.1m/s  ((76.0 kph)) Your answer is correct except for missing units.

2 Answers · Science & Mathematics · 31/10/2020

10. ### A satellite in Earth orbit has a mass of 109 kg and is at an altitude of 1.98 106 m. (Assume that U = 0 as r → ∞.)?

...h = 8.358 x10^6 m Gravitational potential energy U = GMm/ r -->  set r = a, m = 109 kg and M = 5.972 x 10^24 kg U = 5.195x10...

1 Answers · Science & Mathematics · 31/10/2020