Which elements are found in a high proportion in Earth's crust?

aluminum and iron

oxygen and silicon

calcium and sodium

potassium and magnesium

Which characteristics are shared by electromagnetic and mechanical waves?

A ball rolls down a hill and hits a box. The momentum of the ball decreases. Which happens to the momentum? Select one of the options below as your answer: a. It is transferred to the box. b. It is converted to inertia. c. It is converted to mass.

13. How is 0.00069 written in scientific notation? A. 69 x 10-5 B. 6.9 x 104 C. 0.69 x 10-3 D. 6.9 x 10-4

The measured mass of a body is found to be 110g. The length is measured by a meter scale. Actual mass and length of the body are 100 g and 10 cm. Find the percentage error in the calculation of density.

A student built the circuit shown in the diagram below. 12V 1.6 AY 3.52 р Calculate the total resistance of the circuit in the diagram above. Use the equation: potential difference resistance = current

Which of these could be the dimensions of an object with a volume of 1 cm³? A. 1 cm * 1 cm * 1 cm B. 0.5 cm * 1 cm * 4 cm C. 10 cm * 1 cm * 10 cm D. 0.3 cm * 0.3 cm * 0.4 cm

If the wavelength of a yellow light is 580nm what is its frequency?

Which two stimuli did John B. Watson associate in his infamous "Little Albert" experiment? A. a white lab rat and the boy's mother B. fear and a loud noise C. a white lab rat and a loud noise D. fear and the boy's mother

How many basic types of electronic signals are there? two four three ten

Cual es el peso de 5L de un fluido que tiene una densidad 3.5 veces mayor que la del agua?