What is great summary in physical science?

A 1500 W radiant heater is constructed to operate at 115 V. (a) What will be the current in the heater? (b) What is the resistance of the heating coil? (c) How many kilocalories are generated in one hour by the heater? (1 Calorie = 4.18 J)

Consider the following wave function in SI units: ΔP (x, t) = (24.0 / r) sin (1.35r - 2050t) Include answers to such questions as the following and give representative values for any quantities that can be evaluated.

What is true about scientific "law"? all experiments appear to "prove" the theory all predicted observations are verified the law is repeatable no exceptions to the law are known all of the above

Describe two ways to change the frictional force between two solid surfaces.

The professor throws a ball straight up. The ball leave's the prof's hand 2.0 m above the ground, with a velocity of 15 m/s.

Which of the following elements would you expect to be most reactive, based on the number of valence electrons it has? A. Magnesium (Mg) B. Sodium (Na) C. Aluminum (Al) D. Sulfur (S)

The earthquake killed about 60 people and was the strongest earthquake to hit

A sailor drops a wrench from the top of a sailboat's vertical mast while the boat is moving rapidly and steadily straight forward.

An eagle carries a fish up 50 m into the sky using 90 n of force. how much work did the eagle do on the fish

Consider a steel guitar string of initial length l=1.00m and cross-sectional area a=0.500mm2. the young's modulus of the steel is y=2.0*1011n/m2.