34

SE

selenium

78.94

How many protons (atomic number) does the element shown contain in each of its atoms?

A)

68

B)

34

C)

17

D)

78.94

10. Cumulus and stratus clouds belong to which cloud group?

Which cell can produce hydrogen gas fuel by using electricity to decompose water?

How does newton's first law affect human motion?

Even though animals can communicate with each other to a limited extent, no animal can express itself through: A : motions B : noises C : speech D : instinct

A car traveling at 26 m/s starts to decelerate steadily. It comes to a complete stop in 5 seconds. What is its acceleration?

The conservation of energy covers all types of energy. This lesson has only provided a handful of examples of it. To be more convinced that it works in another context, devise an experiment to evaluate the conservation of energy.

Which technology category would NOT likely be the subject of a standard published by the International Electrotechnical Commission (IEC) ? A. Semiconductors B. Solar energy C. Encryption D. Consumer appliances

In the kitchen of your house you would like to run a 240 W blender, a 30 W phone charger, a 720 W toaster oven, and two 120 W lights. Assuming your house is wired for 120 Volts, how much current will be pulled by these electrical devices?

The specific heat of solid Substance A is 0.1 kJ/kg K. The specific heat of solid Substance B is 1.0 kJ/kg K. Which substance will require a higher number of joules to heat from 10°C to 20°C?

What is the difference between unicellular and multicellular organisms?