Answer:
The length of the runway to the nearest meter is 306 m.
Explanation:
Given:
Initial velocity of Christina is,
Time taken is,
Acceleration experienced by Christina is,
The length of the runway is,
Now, we use Newton's equation of motion that relates the distance, initial velocity, time and acceleration.
So, we have the following equation of motion:
Plug in all the given values and solve for 'd'. This gives,
Therefore, the length of the runway to the nearest meter is 306 m.
Answer:
180,000 Joules
Explanation:
Hint: 1200 W = 1200 J/S
The kettle takes 2.5 minutes to boil water.
1 minute = 60 seconds
2.5 minutes = ?
Cross multiplying gives; 150 seconds
The energy transferred to boil the water in 150 seconds = 1200 J/S × 150 S = 180,000 J
Answer:
Legs are the 2nd class lever.
Arms are the 3rd class lever.
Explanation:
A lever is an inflexible body fit for turning on a point on itself. There are three types of lever
1) 1st class lever: (pivot is in the center of load and effort)
In the human body are uncommon. One model is the joint between the head and the principal vertebra
2) 2nd class lever: (load is in the center of pivot and effort)
In the human body, the 2nd class lever is found in the lower leg when somebody remains on tiptoes.
3) 3rd class lever: (The load is far from the pivot than the effort.)
In the human body; one model can be delineated in the elbow joint
Hi, the answer for this question is element!
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Answer: To complete the process of digestion after the food is ingested by mouth.
Explanation:
The food that we eat is ingested by mouth and here the mechanical degradation of food takes place. This breaks down the food into smaller pieces.
Mouth also contains the enzyme that is responsible for the digestion of starch.
Then the food from the mouth reaches the stomach where various types of digestive juices and enzymes are secreted to digested the food.
Hence, mouth and stomach must be near in the digestive system.