Questions by Jack Gao

Questions by Jack Gao

ASAP!!! HELP, PLEASE. I REALLY NEED IT.

asked Aug 20, 2020

1 answer

2 votes

52.5k views

Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were about 95% copper and 5% tin and zinc. However, from 1793-1837, pennies were pure copper. If you had a penny

asked Jun 5, 2020

1 answer

2 votes

159k views

What is the average isotopic mass of an element that has the following abundances in nature? Isotopic mass: X20 X22 X23 Abundances in natures: 90.5 % 8.0 % 1.5 %

asked Feb 27, 2020

1 answer

2 votes

196k views

The temperature of the air is 26 ∘C at sea level, use the average lapse rate to calculate the expected temperature at the top of a 6000-meter mountain.

asked Feb 15, 2020

1 answer

3 votes

81.1k views

PLEASE HELP 4. Complete each of the following parts and show your work: a.) Draw the electric field around a +2.0 × 10–5 C point source charge. Draw the field lines and indicate their direction. Draw two

asked Nov 8, 2019

1 answer

4 votes

210k views

Leon charged $75 at an interest rate of 12.5%. How much will Leon have to pay after one month if he makes no payments?

asked Apr 11, 2019

1 answer

0 votes

102k views

4-2/3x=2/5? How can I rewrite so it doesn't have fractions?

asked Oct 17, 2018

1 answer

0 votes

17.1k views

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