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1. ### Suppose your waffle iron is rated at 0.50 kW when connected to a 1.50 102 V source. (a) What current does the?

P = E * I 500 W = 102V * I Solve for I P = E^2 / R Solve for R.

1 Answers · Science & Mathematics · 26/05/2011

2. ### If a train with a mass of 7.22 × 10^7 kg is traveling at a velocity of 45 mi/hr, what is the required force...?

...: There are several ways to do this. One is to use Force x distance... per hour Kinetic Energy: 73, 102 , 500 ,000 Joules Unfortunately, that math isn...

3 Answers · Science & Mathematics · 03/11/2011

3,800 = 3.80 (10³) or 38.0 ( 10² ) or 380(10¹) 7, 500 = 7.50 (10³) or 75.0 ( 10² ) or 750(10¹) As a form...

1 Answers · Science & Mathematics · 11/11/2014

...from 10 km/hr to 120 km/hr. How much work does this require? calculate the difference in KE...½m(V₂² – V₁²) = 500 (120²– 10² ) = 500 (14300) 3) A 12 V DC...

1 Answers · Science & Mathematics · 19/12/2011

5. ### A crane lifts a 500 kg beam vertically upward 21 m, then swings it eastward 18 m.?

When we "Neglect friction and assume the beam moves with constant speed", we simply consider only the change of potential energy, which is: mgh = ( 500 kg)*(9.8m/s^2)*(21 m) = 102 .9 kJ

1 Answers · Science & Mathematics · 15/02/2008

6. ### An object is thrown vertically upward w/ a velocity of 500 m/s.?

...s - s = 465 m C) Rise time from v = u + at t = (v - u)/a = - 500 /-9.8 = 51 s Returns after 102 s D) Returns to starting point: displacement = 0

1 Answers · Science & Mathematics · 03/02/2010

7. ### A 500 -kg elevator is raised to a height of 20 m in 10 seconds. Calculate the power of the motor.?

Everyone else did it assuming constant velocity...rest). d = .5at² 20 = 0.5a( 10² ) a = 0.4 m/s² Then...ma F = m(a + g) F = 500 (0.4 + 9.81) F = 5105 N...

4 Answers · Science & Mathematics · 09/12/2012

8. ### Trying to understand physics problem?

...while pulling. Ff = 0.5 N = 0.5( 500 - 0.5T) = 250 - 0.25T > The formula... for Ff above. What he did here is set the 2 expressions equal to each...

1 Answers · Science & Mathematics · 22/01/2013

9. ### Intro Physics Question?

... = 10 m/s resultant velocity (size) = √(20²+ 10² ) = √ 500 = 22.4 m/s ANS-1a release angle = arctan 20/10...-1b change values of Vy and do the same math 3 more times to finish entire prob...

1 Answers · Science & Mathematics · 03/11/2013

10. ### Physics help please. I did it but I'm not sure if I got the second part right thanks :)?

...v̂ᵣₑ = 20 m/s west + 10 m/s north |v̂ᵣₑ| = √ [(20)² + 10² ] = √ 500 = 10√5 m/s = 10(2.2361) = 22.36 m/s direction is given with θ...

1 Answers · Science & Mathematics · 06/10/2015