MOST ARE IN AGREEMENT THAT ALPHA WAVES ARE THE MOST CONDUCIVE TO LEARNING.
Answer:
The ratio of momentum is 1:2 since the velocity is constant and mass is of ratio 1:2
Explanation:
Given
mass of car = 500 kg
mass of truck = 1000 kg
velocity of car = velocity of truck = v = 5 m/s
momentum of car = ?
momentum of truck = ?
We know that the momentum is given by: p = mv , where m is mass and v is velocity.
momentum of car = x v = 500 x 5 = 2500 kg.m/s
momentum of truck = x v = 1000 x 5 = 5000 kg.m/s
The ratio of momentum =
=
= = 1:2
Here we infer that the ratio is 1:2. This is because momentum value depends on mass and velocity of body. In given problem velocity is constant. Hence depends only on mass. The ratio of mass is 1:2 and so the ratio of momentum.
Answer:
Internal energy increases when heat is transferred to the system
Explanation:
To answer this question you can make use of the first law of thermodynamics, which is a way to state the conservation of energy:
Where U is the internal energy of the system
Q is heat, and W is work done by the system.
This law tells us that the change in internal energy is proportional to the heat added to the system minus the work done by the system.
So for the internal energy of a system to increase, heat must be added to it.
Answer:
Fresultant = - 800 [N]
m = 224.26 [kg]
a = 3.56 [m/s²]
Explanation:
The resulting force can be determined by the arithmetic difference of the air resistance force and the gravity force.
The negative sign of the result means that the force is directed downwards.
The mass can be easily calculated using the definition of the weight of the body. Where the weight is equal to the product of mass by gravitational acceleration.
where:
m = mass [kg]
W = weight = 2200 [N]
g = gravity acceleration = 9.81 [m/s²]
Finally, acceleration can be calculated using Newton's second law which tells us that the resulting force on a body is equal to the product of mass by acceleration.
The positive sign of acceleration tells us that effectively the body moves down.