Answer:
The average force that the shooter must exert to prevent the weapon from moving is 21.7 Newtons.
Explanation:
m=33g=0,033kg
V= 342 m/seg
115 bullets/min= 1 bullet every 0.52 seconds.
By the principle of momentum and amount of movement we have to:
F*t=m*V
F= (m*V)/t
F= (0.033kg * 342 m/s) / 0.52 sec
F= 21.7 Newtons
Answer:
The second one
Explanation:
For example using a battery, copper, and a nail
The temperature of the body is equal to 39.48°C
Why?
To find the temperature of the body that produces 9.0cm of this mercury column, we need to use the formula for linear interpolation. Also, the temperatures to use are based on the Celsius degrees scale.
For the fixed tempetatures, we have:
![1.26cm=0\°C(ColdWaterPoint)\\20.86cm=100\°C(BoilingWater)Point\\](https://tex.z-dn.net/?f=1.26cm%3D0%5C%C2%B0C%28ColdWaterPoint%29%5C%5C20.86cm%3D100%5C%C2%B0C%28BoilingWater%29Point%5C%5C)
We need to use the following formula for linear interpolation:
![y=\frac{x-x_{1}}{x_{2}-x_{1}}*(y_{2}-y_{1})+y_{1}](https://tex.z-dn.net/?f=y%3D%5Cfrac%7Bx-x_%7B1%7D%7D%7Bx_%7B2%7D-x_%7B1%7D%7D%2A%28y_%7B2%7D-y_%7B1%7D%29%2By_%7B1%7D)
Then, we have:
![1.26cm=0\°C\\20.86cm=100\°C\\9.0cm=???\\\\x_{1}=1.26cm,y_{1}=0\°C\\\\x_{2}=20.86cm,y_{2}=100\°C\\\\x=9.0cm,y=???](https://tex.z-dn.net/?f=1.26cm%3D0%5C%C2%B0C%5C%5C20.86cm%3D100%5C%C2%B0C%5C%5C9.0cm%3D%3F%3F%3F%5C%5C%5C%5Cx_%7B1%7D%3D1.26cm%2Cy_%7B1%7D%3D0%5C%C2%B0C%5C%5C%5C%5Cx_%7B2%7D%3D20.86cm%2Cy_%7B2%7D%3D100%5C%C2%B0C%5C%5C%5C%5Cx%3D9.0cm%2Cy%3D%3F%3F%3F)
So, interpolating we have:
![y=\frac{(9cm-1.26cm)}{(20.86cm-1.26cm)}*(100\°C -0\°C)+0\°C\\\\y=0.39*100\°C=39.48100\°C](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B%289cm-1.26cm%29%7D%7B%2820.86cm-1.26cm%29%7D%2A%28100%5C%C2%B0C%20-0%5C%C2%B0C%29%2B0%5C%C2%B0C%5C%5C%5C%5Cy%3D0.39%2A100%5C%C2%B0C%3D39.48100%5C%C2%B0C)
Hence, the temperature of the body is equal to 39.48°C
Have a nice day!
The power developed by the student is 756.9 J/s and remains the same if the student takes the same time to climb the stairs when climbing it in two's and three's.
<h3>What is power?</h3>
Power is the rate at work is done.
- Power = work done/time
- work done = mass × acceleration due to gravity × height
Work done = 65.5 × 10 × (18 × 0.165) = 1945.35 J
Power = 1945.35/2.57 = 756.9 J/s
If the student climbed the steps in two or three at a time, the power does not change if the time remains the same.
- Time required = Energy/ power
The time required to convert the Big Mac meal from McDonalds = 4 853 440/756.9
Time required = 6412.26 seconds
Therefore, from the power developed by the student, it will take him 6412.26 seconds to convert all the energy in a Big Mac meal.
Learn more about power at: brainly.com/question/1634438
#SPJ1
Answer:
While traveling downhill, the car’s potential is <u>increasing</u> and kinetic energy is <u>decreasing</u>
Explanation:
hope this helps!