Answer:
I) You walk barefoot on the hot street and it burns your toes.
II) When you get into a car with hot black leather in the middle of the summer and your skin starts to get burned.
Explanation:
In conduction mode of heat transfer we know that the energy is transferred from one system to other system due to direct contact of two bodies
Here due to this direct contact the energy is transferred via a given solid or liquid medium
In this type of heat transfer medium particles will remain in its own position only the energy is transferred.
So here we can say the correct answer will be
I) You walk barefoot on the hot street and it burns your toes.
II) When you get into a car with hot black leather in the middle of the summer and your skin starts to get burned.
1,2,5 are correct answers.
The amount of force required to accelerate 57kg skier with an acceleration of 4m/s² is 228N.
<h3>How to calculate force?</h3>
Force is a physical quantity that denotes ability to push, pull, twist or accelerate a body and which has a direction and is measured in a unit dimensioned in mass × distance/time².
The force applied on an object can be calculated using the following formula:
Force = mass × acceleration
According to this question, a skier with mass 57kg accelerates at 4m/s². The force required can be calculated as follows:
Force = 57kg × 4m/s²
Force = 228N
Therefore, the amount of force required to accelerate 57kg skier with an acceleration of 4m/s² is 228N.
Learn more about force at: brainly.com/question/1046166
#SPJ1
Answer:
Stop watch
Stop clock
Explanation:
Absolute time is time measured in definite periods such as minutes, days, and years. It can be measured uising stop watch or stop clock
Answer:
a) P =392.4[Pa]; b) F = 706.32[N]
Explanation:
With the input data of the problem we can calculate the area of the tank base
L = length = 10[m]
W = width = 18[cm] = 0.18[m]
A = W * L = 0.18*10
A = 1.8[m^2]
a)
Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:
P = density * g *h
where:
density = 1000[kg/m^3]
g = gravity = 9.81[m/s^2]
h = heigth = 4[cm] = 0.04[m]
P = 1000*9.81*0.04
P = 392.4[Pa]
The force can be easily calculated knowing the relationship between pressure and force:
P = F/A
F = P*A
F = 392.4*1.8
F = 706.32[N]
