What is the approximate weight of a 400 kg object?

Which of the following statements is true about scientific theories? A. Scientific theories become scientific laws. B. Scientific theories are never proven. C. Scientific theories become hypotheses. D.

Is density a physical change, chemical change, physical property, or a chemical property?

Which term does not describe a conversion between states of matter?

When the sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.35 m/s at 52.0° below the horizontal. Calculate the speed of its shadow on the level ground. M/s?

A stiff wire 32.5 cm long is bent at a right angle in the middle. One section lies along the z axis and the other is along the line y=2x in the xy plane. A current of 25.0 A flows in the wire-down the z axis and out the line in the xy plane.

A container, partially filled with water, is resting on a scale that measures its weight. Suppose you place a 200 g piece of wood inside the container filled with water. What happens to the scale reading?

Which is the best analogy of a wave? -A wave is like building a ramp. -A wave is like shaking a hand. -A wave is like water rippling in a pond. -A wave is like knocking down a building.

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways of producing sound are similar

What would provide specific information about the materials in the equipment used in a certain experiment

The wavelength of sound wave is 30 m. Frequency is 7 Hz. What is the wave speed