Answer:
Power = 130 watt
Explanation:
Power is described as the ability to do work, it is also defined as the amount of work in Joules done in a given time in seconds. Mathematically, it is represented as:
In this example, power is calculated as follows:
Work = 39000 J
Time = 5 minutes
converting the time from minutes to seconds:
1 minute = 60 seconds
∴ 5 minutes = 60 × 5 = 300 seconds
N:B the unit for power can also be represented as Joules/seconds or J/s or JS⁻¹
If the spheres are have to have the same and the same size, it is expected that they will have the same surface area. The only factor that affects the descent of the object through gravity on Earth is the surface area that is exposed to the resistance of air. For this case, it is expected that they will reach the bottom of the inclined plane together. The answer is C.
Answer:
Explanation:
To solve this problem we will use the Ideal Gas Law, which forms the following formula
Where
= Pressure of Gas
= Volume of Gas
= Moles of Gas
= Constant = 0.0821 atm L/mol K
= Temperature of Gas
There are two states to consider
State 1 is given
= 0.741 atm
= 112 mL
= unknown
= 0.0821 atm L/mol K
= 300K
State 2 is based on Standard Room Temperature Pressure (STP) which are fixed values
= 1 atm
= unknown
= unknown
= 0.0821 atm L/mol K
= 273.15K
Since this is the same mass of gas it can be reasoned that the moles of gas are the same. We rearrange the Gas Law Formula to the following
We input the values and equate the formulas for both states by substituting the value of n
Answer
All the three answers are attached (in image form). Good luck!
Answer:
0.20
Explanation:
The box is moving at constant velocity, which means that its acceleration is zero; so, the net force acting on the box is zero as well.
There are two forces acting in the horizontal direction:
- The pushing force: F = 99 N, forward
- The frictional force: , backward, with
coefficient of kinetic friction
m = 50 kg mass of the box
g = 9.8 m/s^2 gravitational acceleration
The net force must be zero, so we have
which we can solve to find the coefficient of kinetic friction: