Answer:
Pressure
Explanation:
The measure of how much force is applied to an object from gas particle bouncing into it is called pressure.
Pressure is defined as the force per unit area on a body.
Mathematically;
Pressure =
The pressure of a gas is the combined force with which gas molecules bombard a unit area of the wall of the container. It is the sum of all tiny pushes on the wall of the container.
Various units of pressure are atm, mmHg, torr, pascal e.t.c
Answer:
It Is 25J greater.
Explanation:
Applying the Energy conservation theorem, we have:
The Work done by the ice worker is given by:
The angle is 180 degrees because the force exerted by the worker is opposite to the motion.
If the rope was not there, the external work is 0, so:
The kinetic energy is 25J greater without the rope.
Answer: Option A: The number of trees sampled.
The accuracy can be understood as how close is the measured value to the true value. The aim is to monitor the population size of the insect pest in a 50 square kilometer. Random trees are selected, and number of eggs and larvae are counted. So, the measured value would be closer to actual value when the number of trees sampled are increased. More the number of trees sampled, less would be the chances of error and the accuracy of the estimate would increase.
Using
KE = ½mv² = ½×1500×19×19 = 270750 joules
C. a cello playing music at the concert