Is it true that once rocks forms it never changes

A force of 1000 Newtons is used to push a box on a flat floor. It accelerated at a rate of 5 m/s2. What is the mass of the wagon?

What is the temperature of a system in thermal equilibrium with another system made up of ice and water at 1 atm of pressure? a. 0°F c. 0 K b. 273 K d. 100°C

Which groups of people are involved in the immigrants movement

Neritic Sediments are deposited on the ocean floor in a sorted manor. In which order are the sediments ordered moving from the shoreline to further offshore? A. Larger to smaller B. Smaller to Larger

Which of the following statements is true? A. Surface water can become groundwater, but groundwater cannot become surface water. B. Surface water can seep downward to become groundwater. C.

Kim holds a pinwheel in the air and says it can be used to model a source of energy. Identify the type of energy Kim's pinwheel models. Explain the type of energy source used.

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors

1. Strzała o masie 20 g tuż po wystrzale ma prędkość 50 m/s. Oblicz pracę wykonaną przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy? 2. Na trampolinę o współczynniku sprężystości k=2 kN/m stanął zawodnik o masie 80 kg.

Two small plastic spheres between them has magnitude 0.22 N. What is the charge on each sphere is one the other? Explain whether it can be determined from the information give, whether the charges are positive or negative.