The state of the atmosphere at a given place and time as regards to heat, dryness sunshine, wind, rain, etc.
Friction is a force that acts in a direction opposite to motion. If there were not force of friction, a baseball player would never stop and would be continuously moving in the direction of motion. Balanced forces do not cause a nonmoving object to start moving.
Answer:
1476 J
Explanation:
From the question,
Net Work done = Net force× distance moved by net force.
W' = (F-F')×d................... Equation 1
Where W' = Net work done, F = force applied, F' = Frictional force, d = distance moved.
Given: F = 150 N, F' = 37 N, d = 12 m
Substitute these values into equation 1
W' = (150-37)×12
W' = 123×12
W' = 1476 J.
hence the Net Work done by the object is 1476 J
"They have learned the precise depths where the boundaries between the earth's layers are located" is the one among the following choices given in the question that scientists have <span>learned from studying seismic waves that travel through earth’s interior. The correct option among all the options given is option "B". </span>
Answer:
Approximately 
assuming no heat exchange between the mixture and the surroundings.
Explanation:
Consider an object of specific heat capacity 
and mass 
. Increasing the temperature of this object by 
would require 
.
Look up the specific heat of water: 
.
It is given that the mass of the water in this mixture is 
.
Temperature change of the water: 
.
Thus, the water in this mixture would have absorbed :
.
Thus, the energy that water absorbed was: 
.
Assuming that there was no heat exchange between the mixture and its surroundings. The energy that the water in this mixture absorbed, 
, would be the opposite of the energy that the metal in this mixture released.
Thus: 
(negative because the metal in this mixture released energy rather than absorbing energy.)
Mass of the metal in this mixture: 
.
Temperature change of the metal in this mixture: 
.
Rearrange the equation to obtain an expression for the specific heat capacity: 
. The (average) specific heat capacity of the metal pieces in this mixture would be:
.
