By the time she managed/had managed to open the door, the postman already went/had already gone.

When expressing the unit for work, which of the following is the correct choice?

Suppose the same amount of heat is applied to two bars. they have the same mass, but experience different changes in temperature. are the specific heat capacities the same for the two bars? explain.

URED What is the main use of freshwater worldwide? O A. Industrial uses, such as manufacturing O O B. Agricultural uses, such as watering crops C. Residential uses, such as bathing and cooking O D. Recreational uses, such as boating and swimmitig

What happens to the Connecticut Energy of a snowball as it rolls across the lawn and gains mass?

A child pulls a 15 kg sled containing a 5 kg dog along a straight force of 55 N on the sled at an angle of 20° above coefficient of friction between the sled and the ground is 0.

Arches National Park, Utah Constructive or Desructive force

A mosquito of mass 0.15 mg is found to be flying at a speed of 50 cm/s with an uncertainty of 0.5 mm/s. (a) How precisely may its position be known? (b) Does this inherent uncertainty present any hindrance to the application of classical mechanics?

A Carnot engine has a power output of 148 kW. The engine operates between two reservoirs at 17◦C and 727◦C. How much thermal energy is absorbed each hour? Answer in units of J.

Which of the following tests is NOT a part of the Fitness Assessment?

A tuba creates a 4th harmonic of frequency 116.5 Hz. When the first valve is pushed, it opens an extra bit of tubing 0.721 m long. What is the new frequency of the 4th harmonic? (Hint : Find the original length.)