Answer:
a. 2040 m
b. 3000 m
c. 1697.5 m
Explanation:
Given that:
v(t) = 400 - 20t
0 ≤ t ≤ 10
We can get the formula for distance traveled by integrating the velocity, v(t), with respect to time:
=> s(t) = 400t - 10t²
a. First 6 mins:
t = 6 mins
s(t) = 400(6) - 10(6)²
s(t) = 2400 - 360
s(t) = 2040m
b. First 10 mins:
t = 10 mins
s(t) = 400(10) - 10(10)²
s(t) = 4000 - 1000
s(t) = 3000 m
c. When v(t) =290 m/mins
We insert this into the v(t) equation so we can find time t.
v(t) = 400 - 20t
290 = 400 - 20(t)
20t = 400 - 290
20t = 110
t = 110/20 = 5.5 mins
Now we insert that into the s(t) equation:
s(t) = 400(5.5) - 10(5.5)²
s(t) = 2200 - 302.5
s(t) = 1697.5 m
The father because kinetic energy is calculated using 1/2mv^2, but in this case if the velocity was the same then the mass would affect the calculation, and the father has the greater mass this making him have the greater kinetic energy
Interval training is simply alternating short bursts (about 30 seconds) of intense activity with longer intervals (about 1 to 2 minutes) of less intense activity. For instance, if your exercise is walking and you're in good shape, you might add short bursts of jogging into your regular brisk walks.
Calibration can be defined as the way an instrument is adjusted such that the measurement the instrument gives after calibration is <u>precise and accurate.</u>
One effective way to calibrate a thermometer is the <em><u>use of ice water.</u></em>
A thermometer can be defined as the <em><u>instrument used to measure the temperature of a person or a substance. </u></em>
A thermometer should be calibrated <em>regularly</em> in order to maintain a high level of precision and accuracy.
One of the effective ways to calibrate a thermometer is through the use of ice water.
The steps to calibrate a thermometer are given below:
- <em>Get a bowl, place some ice cubes in it and add additional cold water to it. </em>
- <em> Place thermometer probe between 2 -3 inches deep in the water. </em>
- <em>For accurate calibration, make sure you prevent the thermometer from touching the sides of the glass. </em>
- <em> Stir and wait for a few seconds.</em>
- <em> The thermometer should be properly calibrated when you read the measurements and it says 32°F</em>
To learn more, visit the link below:
brainly.com/question/11288363
I believe the answer is 3). The cell wall provides protection, it doesn’t control movements of materials in and out of the cell.