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

A rock is thrown down with an initial speed of 25.3 m/s from a bridge to the water below. It takes 2.29 s for the rock to hit the water. How high is the bridge above the water in meters?

How much heat energy is required to raise the temperature of 5 kilograms of coal from 20°C to 220°C? A) 314 J B) 4,187,000 J C) 1,314,718 J D) 6,573 J

A 8.3-g wad of sticky clay is hurled horizontally at a 82-g wooden block initially at rest on a horizontal surface. The clay sticks to the block. After impact, the block slides 7.50 m before coming to rest.

A wave that is traveling toward an interface is called the ... ?

What is the most important use of an element's atomic number?

How long is a pendulum with a period of 1.0 s on a planet with twice the gravity of the earth? 0.25 m 1.0 m 0.50 m 0.10 m

In an AC circuit that contains a resistor, a capacitor, and an inductor, impedance replaces the DC concept of resistance. Explain briefly the difference between the two quantities.

Parallax can be used to measure a star's

un objeto se lanza verticalmente hacia arriba con una velocidad de 40 km/h calcular el tiempo que tarda cuando alcanza su altura maxima

What gas law looks at the relationship between pressure and temperature of a gas? A) Boyle's Law B) Charles' Law C) Gay Lussac's Law