Physics, 04.02.2020 11:56 rjmarin592ovzbn9
1. minerals are naturally occurring, substances with a fixed crystal structure and a unique chemical composition.
2. processing ore sometimes involves or grinding minerals.
3. prehistoric people used for knives and arrowheads.
4. the average american house contains about pounds of minerals.
5. early used rocks as simple tools as early as 2.6 million years ago.
Answers: 3
Another question on Physics
Physics, 21.06.2019 20:30
When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m
Answers: 2
Physics, 22.06.2019 08:30
An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?
Answers: 1
Physics, 22.06.2019 12:10
Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)
Answers: 3
Physics, 22.06.2019 15:30
This is the number of complete movements of a wave per second.
Answers: 1
You know the right answer?
1. minerals are naturally occurring, substances with a fixed crystal structure and a unique chemica...
Questions
Advanced Placement (AP), 18.11.2020 01:20
Mathematics, 18.11.2020 01:20
Mathematics, 18.11.2020 01:20
Mathematics, 18.11.2020 01:20
Mathematics, 18.11.2020 01:20
Geography, 18.11.2020 01:20
English, 18.11.2020 01:20
Health, 18.11.2020 01:20
History, 18.11.2020 01:20
Mathematics, 18.11.2020 01:20
