A20 kg block slides to the left along a horizontal frictionless surface and hits an uncompressed spring of spring constant 810 n/m, which sends the mass back to the right with the same speed. for how long is the block in contact with the spring? a) 0.785 s b) 0.641 s c) 0.597 s d) 0.555 s e) 0.494 s

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation:

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

there are no components of a physical goal mentioned on the list of choices that you've provided.