Jayden and Jordan used an iron bolt to build an electromagnet that will pick up 4 pins. How can they increase the strength of their electromagnet so that it will pick up 10 pins? Use a smaller iron bolt that has a smaller diameter.

Use fewer coils of wire around the iron bolt .

Use a bigger iron bolt where more coils can be added.

Use a smaller battery .

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Which of the following is an example of units for speed