PLEASE HELP ME 3. If an object accelerates at 40 m/s per second in four minutes, what will be the final velocity? (assume the object started from rest) 4. If an object had an acceleration of 2.5 m/s per second and its final velocity was 115 m/s after 45 seconds, what was the starting velocity?

3. 9600m/s

4. 2.5m/s

Explanation:

To find the final velocity of the object which accelerates at 40m/s/s for four minutes, we first need to convert the 4 minutes to seconds. There are 60 seconds in a minute so 4 minutes is equal to 4x60 = 240 seconds.

To calculate the final velocity we just multiply the acceleration rate by the time, so 40x240=9,600 m/s

The final velocity of the object would be 9600m/s.

If an object's final velocity was 115m/s after 45 seconds then we need to find out how much it accelerated in that 45 seconds to find the starting velocity. 45x2.5=112.5 It increased in speed by 112.5m/s over 45 seconds, so its initial speed was 112.5m/s slower than its final speed. 115-112.5=2.5, the object's starting velocity was 2.5m/s.

Hope this helped!

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

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!