An automobile engine has an efficiency of 19.0%. If it produces 23.0 kJ of mechanical work per second, the heat rejected per second from the engine is closest to: (a) 77.0 kJ (b) 81.5 kJ (c) 86.5 kJ (d) 92.0 kJ (e) 98.1 kJ

Find δerxn for the combustion of naphthalene. the heat capacity of the calorimeter, determined in separate experiment, is 5.11kj/∘ c.

A particle moves along a line so that its position at any time is t>0 or t=0 is given by the function s (t) = (t^3) - (6t^2) + (8t) + 2 where s is measured in meters and t is measured in seconds. a) find instantaneous velocity at any time t.

The answer using the graphical method and analytical method of vector addition will always be. A. Subtraction B. Addition C. The same D. Different

You have a device that takes temperature measurements and runs off of solar power. How often it is programmed to take a measurement will affect how much power it uses--more frequent measurements, more power.

Archaeologists find an object that is known to have been created 18,000 years ago. Measurements indicate that 1000 atoms of 14C are present in the object. How many atoms of 14C were present when the object was made?

If the photon scatters in the backward direction, what is the magnitude of the linear momentum of the electron just after the collision with the photon

A car speeds up from 15 m/s to 30 m/s in 12 seconds. What is the acceleration of the car?

These examples include learned and innate behavioral adaptations of animals. Which statement describes a learned behavioral adaptation of an animal? A. Your knee j e r k s when it is hit by a doctor. B. A dog shakes water from its fur. C.

Vitellium (Vi) has the following composition:Vi-188: 187.9122 amu; 10.861%Vi-191: 190.9047 amu; 12.428%Vi-193: 192.8938 amu; 76.711%Based on this data, what can you predict about the average atomic mass of vitellium?

if you have an experimental setup which has three unknowns, how many linearly independent equations do you need to determine the unknowns to find one unique solution?