# Yahoo Web Search

1. ### What is the difference between a d. c . motor and an a . c . generator?

In both you have a rotor and a commutator. The rotor ... DC motor has a split rotor so that when it's...it can continue on through by momentum. And at exactly the right time the ...

2 Answers · Science & Mathematics · 19/10/2010

2. ### A 3.8 µ C (q1) and a -3.0 µ C (q2) charge are placed 1.6 cm apart. At what points along the line joining them do?

... I ll just give distance from q2 and state whether that s inside (between q1 and q2) or outside (beyond q2) A . One null-field point at 0.12753 m, outside. [ Derivation: (d2/d1)^2...

2 Answers · Science & Mathematics · 19/11/2008

3. ### Argon enters a turbine at a rate of 74.0 kg/min, a temperature of 850° C , and a pressure of 1.70 MPa. It expand?

...it is 5/3 because it is a monatomic gas. Solve for ...out = m_dot*(h3 - h4) Where h3 and h4 are enthalpies...*(k - 1)) Now, for part C , let's consider all the states...

2 Answers · Science & Mathematics · 26/10/2012

4. ### A force of 3.40 102 N exists between a positive charge of 7.00 10-5 C and a negative charge of -3.00 10-5?

F = K|q1q2|/r^2 where q1 and q2 are charge 1 and charge 2, K = 8.988x10^9 Nm^2/ C ^2, r is the distance between them. This here is the...

2 Answers · Science & Mathematics · 04/04/2011

5. ### A Carnot engine has a power output of 240 kW. The engine operates between two reservoirs at 9 C and 661 C . a )?

9 C = 282 K 661 C = 934 K Carnot Efficiency = (934 - 282)/934... = 1235000E3 = 1.23E9 J ANS a ) Energy Ouptut each hour = 3600 x 103E3...

2 Answers · Science & Mathematics · 20/12/2012

6. ### A nonconducting sphere with center C and radius a has a spherically symmetric electric charge density.?

...1/(4 π ε_0) (Q/R²), and the vector E points to the... value the one given in a . It points perpendicularly to... |E| = Q/ε_0 c . The new charge produces...

2 Answers · Science & Mathematics · 17/01/2010

7. ### What are the magnitude and direction of the electric field at a point midway between a -9.0 µ C and a +4.0 µ C c ?

...2x10^7 N/ C The direction of the electric field towards -9 µ C and -7.2x10^7 N/ C .

1 Answers · Science & Mathematics · 23/03/2013

8. ### A kilogram of ice at 0' C and a kilogram (liter) of boiling water at 100' C are mixed together...?

Just calculate the total calories in the system relative 0° C and divide that by the total mass times specific heat of water (1 Kcal/...

2 Answers · Science & Mathematics · 11/11/2012

9. ### given that vector A + vector V = vector C and that A +B= C , how are vector A and B oriented to one another?

[ A ] + { B ] ==============> [ C ] [ a + jb ] + [ a + jb ] ========> [ 2a + j2b ] M^2 = a ^2 + b^2...believe it is an isosceles triangle vector A = vector B and with same angle

2 Answers · Science & Mathematics · 15/11/2010

10. ### A −2.0 μ C point charge and a 4.0 μ C point charge are a distance L apart. Where should a third point charge be?

... l = L/0.414 Hence the charge has to kept at a distance L/ 0.414 m right from -2.0 μ C and 1.414*L / 0.414 m from 4.0 μ C

4 Answers · Science & Mathematics · 23/01/2011