A ball is thrown vertically upwards with a velocity of 9.8 m/s. Its velocity after 1 second will be [ Take g = 9.8 ms¯²]
9.8 m/s
19.6 m/s
Zero
2.45 m/s

Which of the following is an example of units for speed

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?