Answer:
3x+7=10x+17
Step-by-step explanation:
1.9
10x
27x
Answer:
- 4 . 10
Step-by-step explanation:
Total internal energy increases by 1760 J
Step-by-step explanation:
The kinetic energy of an object is the energy possessed by the object due to its motion.
It is calculated as

where
m is the mass of the object
v is its speed
For the hammer in this problem:
m = 2.50 kg
v = 65.0 m/s
So its kinetic energy is

Then the problem says that 1/3 of the hammer's kinetic energy is converted into internal energy: therefore, the total internal energy increases by

Learn more about kinetic energy:
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$2,346.89 + $500 + $1,456.81 = $4,303.70
$4,303.70 - $324.56 - $25.50 - $78.92 - $30.25 - $60 - $60 - $60 = $3,664.47
$3,664.47 is exactly what they have in their checkbook.
7 minutes is the time can you afford to walk
<em><u>Solution:</u></em>
Given that, train is leaving in 11 minutes and you are one mile from the station
Let "x" represent how much time can you afford to walk
Then, (11 - x) is the time you run
You can walk at 4mph and run at 8mph
<em><u>Convert to miles per minute</u></em>
1 hour = 60 minutes

We know that,

Given that, you are one mile from the station
Therefore,
1 mile = distance walk + distance run

Thus, 7 minutes is the time can you afford to walk