Answer:
i believe the answer is 3
not positive though
Explanation:
Deep inside the core of the sun, protons can collide into eachother with enough speed that they stick together to form a helium nucleus and generate a big amount of energy at the same time.
Answer:
to get, acquire or secure
Answer:
Scientists need instruments to measure the world. Instruments and sensors are needed to collect data - that takes engineering to design and build them.
Explanation:
