A lightweight electric car is powered by ten 12-V batteries. At a speed of 100 km/h, the average frictional force is 1500 N. What must be the power of the electric motor if the car is to travel at a speed of 100 km/h?

In a reversible process both the system and surrondings can be returned to their initial states. a) - True b) - False

Use the graph to determine acceleration and velocity. Which segments show acceleration? What is the velocity of segment B?

Amorphous material is characterized by by a) organized crystalline structure; b) high hardness and ductility c) the chaotic arrangement of atoms or high hardness; d) excellent magnetic, electrical properties, atomic chaotic layout, high hardness.

Francine solves the system of equations using the linear combination method. 4x+3y=-13x-5y=4 Which steps would allow her to eliminate the x terms in the system of equations? Multiply 4x+3y=-1 by - 4. Multiply 3x-5y=4 by 3.

In an ideal Otto cycle, indicate whether the following statements are true or false: (A) All the processes are internally reversible. (B) Cycle efficiency increases with the maximum temperature.

16 Suppose that a steel of eutectoid composition is cooled to 550°C (1020°F) from 760°C (1400°F) in less than 0.5 s and held at this temperature.

The rotor in a shaded pole motor consists of A coils energized by alternating current B a short circuited loop of copper wire c a permanent magnet D an iron cylinder

What factors are likely to promote the formation of stress corrosion cracks?

Find the mass if the force is 18 N and the acceleration is 2 m/s2

Which process must first take place in order for the proteins in foods to be used by body cells? (1) digestion (3) synthesis (2) storage (4) excretion