There is no apparatus for it. It is either use something like ruler and table and rub together or rub our hands, and friction force will be showed.
Answer:
oil production in the USA are majorly from this states:
1.Texas
2. North Dakota
3. California
4. Alaska
5. New Mexico
6. Oklahoma
7.Colorado
8. Wyoming
Explanation:
While other states have seen a boom in recent years, Texas is still the epicenter of the U.S. oil industry, with 27 operable refineries, more than any state. Texas produced 1.2 billion barrels of oil in 2014, which accounted for 36% of total U.S. output, and the state has almost one-third of all proven oil reserves with 10.5 billion barrels.
Answer:
it can be called PE or sometimes, there are equations which you can use the letter U.
Explanation:
D is the answer the force excerted on the ball is greater than gravity
