Answer:
23.9m
Explanation:
step one:
This problem is on energy.
we can proceed by using the expression for potential energy to solve for height h
we know that
PE=mgh
given that
mass m= 5kg
PE= 1176 joules
step two:
we can substitute our data and find h
1176= 5*9.81*h
1176=49.05h
step three:
divide both sides by 49.05 we have
1176/49.05=h
h=23.9 m
The height of the tree is 23.9m
Energy is lost due to friction so it cannot be D, it also cannot be C since you can only have friction during movement, and potential energy is when you have the potential of having an amount of said energy, and friction slows things down, therefore it must be B.
The X and Y components of the force are 90.63 Newton and 42.26 Newton respectively.
<u>Given the following data:</u>
- Angle of inclination = 25°
To determine the X and Y components of the force:
<h3>The horizontal component (X) of a force:</h3>
Mathematically, the horizontal component of a force is given by this formula:
![F_x = Fcos \theta\\\\F_x =100 \times cos25\\\\F_x =100 \times 0.9063](https://tex.z-dn.net/?f=F_x%20%3D%20Fcos%20%5Ctheta%5C%5C%5C%5CF_x%20%3D100%20%5Ctimes%20cos25%5C%5C%5C%5CF_x%20%3D100%20%5Ctimes%200.9063)
Fx = 90.63 Newton.
<h3>The vertical component (Y) of tensional force:</h3>
Mathematically, the vertical component of a force is given by this formula:
![F_y = Fsin \theta\\\\F_y =100 \times sin25\\\\F_y =100 \times 0.4226](https://tex.z-dn.net/?f=F_y%20%3D%20Fsin%20%5Ctheta%5C%5C%5C%5CF_y%20%3D100%20%5Ctimes%20sin25%5C%5C%5C%5CF_y%20%3D100%20%5Ctimes%200.4226)
Fy = 42.26 Newton.
Read more on horizontal component here: brainly.com/question/4080400
Answer: 62.7
Explanation:
The specific heat capacity of water is 4.186 J you multiply 4.186 and 15.0 and you will get 62.7
$18, because $12 dollars divided by 6 packs of pencils= 2, so each pack was $2, 9 times 2 dollars is $18... hope this helps.!