Which actions are evidence that a chemical reaction has occurred? Check all that apply. a change in color the formation of a precipitate a clear liquid becoming cloudy a change in shape the formation of bubbles the formation of smoke

The density of blood is 1.05 kg/m3, find the mass of a bag of blood for a transfusion, if the volume is 2.0 m3.

A 0.780 m long section of cable carrying current to a car starter motor makes an angle of 60.0° with the Earth's 5.50 ✕ 10-5 T field. What is the current (in A) when the wire experiences a force of 7.00 ✕ 10-3 N?

Worldâs tallest building. suppose that you drop a marble from the top of the burj khalifa building in dubai, which is about 830 m tall.

What causes a neap tide?

Whether calculating speed or acceleration, this data is required

Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely belong to which of the following parts of the electromagnetic spectrum? A. gamma rays B. infrared waves C. radio waves D.

A bird sitting high in a tree is an example of an object with what type of energy

The height a ball bounces is less than the height of the previous bounce due to friction. The heights of the bounces form a geometric sequence. Suppose a ball is dropped from one meter and rebounds 95 % of the height of the previous bounce.

Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The specific heat capacity of copper is 0.09 cal/g°C, and the specific heat capacity of aluminum is 0.22 cal/g°C.

A bullet travels at 870 m/s. How long will it take a bullets to go 1 m?