Answer:
The heat loss during the process = -4000 J
Explanation:
Work done by the student (W) = - 1000 J
Negative sign on the system is due to work done on the system.
Decrease in internal energy (U) = - 3000 J
We know that heat transfer in the system is given by (Q) = U + W
⇒ Q = - 1000 - 3000
⇒ Q = - 4000 J
This is the value of heat transfer during the process And negative sign indicates that heat loss during the process.
Answer:
Yes! This sentence is correct.
Explanation:
So the complete question along with options is:
Q. Snowflakes begin to form when water in the atmosphere freezes it causes the water molecules to bond into a hexagonal shape.
a) no change
b) freezes, causing
c) freezes, it causes
d) freezes, this causes.
The coorect option is c.
The correct option is b. The one with the lowest mass.
An object's kinetic energy is determined by
k=1/2mv^2
where
m is the object's mass.
v is the object's speed.
The three missiles in this puzzle have varying masses but the same beginning kinetic energy.
The three projectiles will all have the same kinetic energy when they hit the ground because mechanical energy is conserved, assuming there is no air resistance (because the potential energy that they have lost is the same, since they have been launched from the same height, and they reach the same final altitude, the ground).
hence,
K1=k2=k3
To know more about kinetic energy refer to brainly.com/question/14604194
#SPJ4
Answer: 5.5km
Explanation:
Atmospheric pressure will be 500 mb (that is half of the total 1000mb air pressure).
Pressure decreases with increasing altitude. This is because at At higher altitudes, there are fewer air molecules above a the known or given surface than a similar surface at lower levels.
Pressure decreasing with higher altitudes also means that air pressure decreases rapidly at lowerevels but more slowly at higher levels.
It is also known that more than half of the atmospheric molecules are located below 5.5 km(that is atmospheric pressure decreases within the lowest 5.5 km to about fifty(50) percent( that is 500 millibar).
Answer:
1.67m/s
Explanation:
Total Distance to be travelled by a Runner=100m
Time Taken=10*6s
Speed=Distance/Time
=100/10*6=10/6=1.67m/s
