A horizontal rocket is attached to a stationary car and begins to propel it forward. The rocket applies 10,000 N of force for 100 meters of its total journey. Assuming no other propulsion is used for the car and its wheels are frictionless, how much work does the air do on the car over the course of its total journey?
W=FD, Work = Force X Distance. 10000 N × 100 m = 1000000 Joules
The car was propelled solely by the rocket and was stopped solely by air resistance (no other sources of friction), when the total work done by the rocket must be equal to the total work done by the air.
Which of the following is an example of a naturally occurring catabolic process?
In the cell, metabolism is defined as the chemical reactions that occur within the cell to sustain life. Metabolism can further be divided into anabolism( the synthesis of new compounds) and catabolism (breaking down of substances). DNA replication, photosynthesis, protein synthesis are all anabolic processes, that require the use of energy to make new compounds. In cellular respiration, glucose is broken down to produce ATP.
The amygdala is responsible for creating long-term memory association with highly emotional events, such as fear conditioning. The amydala most likely activates which of the following?
Sympathetic Nervous System…
Flight-or-flight response, which is meditated by the sympathetic nervous system. The parasympathetic nervous system reverses the effects of the sympathetic nervous system and calms the body. The somatic nervous system is involved in skeletal muscle control while the enteric nervous system governs the gastrointestinal tract.
In a small lake, sea urchins graze upon small grasses that grow on the bottom. After introduction of an exotic sea urchin, the small grasses became over grazed and absent. To solve problem, a species of otter is introduced into the lake to predate upon the sea urchins, and the balance between the urchins and sea grasses is restored. What position did the otter take in this? Keystone Predator
The otter would be a considered a Secondary consumer, the urchins are the primary consumers, and a hypothetical predator of the otter would be a tertiary consumer. Since the otter is responsible for preventing overgrazing of the small grasses by predating on the out of control urchin population, it is termed a keystone predator that exerts a “top-down” effect on the ecosystem.
Also I heard the voice of the Lord, saying, “Whom shall I send, and who will go for us? Then said I; send me.
God is looking for people who are willing. Not many people actually want to be found by God. They themselves have found a comfortable spot in Christianity. A place where they have received salvation; yet have no intention to see the salvation of others. Well, aren’t we glad that God does not think like us?
Therefore said he unto them, The harvest truly is great, but the labourers are few: pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest.
: Paul Washer explains what a meek man looks like. I never knew.
But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living, But as for me and my household, we will serve the Lord.
For He knows our frame;
He remembers that we are dust.
As for man, his days are like grass;
He flourishes like a flower of the field;
for the wind passes over it, and it is gone,
and its place knows it no more.
But the steadfast love of the Lord is from everlasting to everlasting on those who fear him,
and his righteousness to his children’s children
to those who keep His covenant
and remember to keep His commandments.
Psalm 103: 15 – 18