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VMariaS [17]
3 years ago
15

#1. A car moving at the rate of 65 miles per hour passes a truck moving in the same direction at 38 miles per hour . What is the

speed of the car to the nearest mile per hour from the truck frame of reference ?
#2. The X-43 is the fastest aircraft ever. It flew a distance of 3,961 km from Los Angeles to New York at the speed of 11,265 km/h . How long did it take the x-43 to fly that distance?


#3. A mail carrier walked six blocked to the north one block to the east , and then six blocks to the south. What is the mail carriers displacement ?
Physics
1 answer:
valentina_108 [34]3 years ago
8 0
<span>#1. A car moving at the rate of 65 miles per hour passes a truck
moving in the same direction at 38 miles per hour.
The speed of the car from the truck's frame of reference is
27 miles per hour. 

#2. The X-43 is the fastest aircraft ever. It flew a distance of 3,961 km
from Los Angeles to New York at the speed of 11,265 km/h.
It took the X-43  (3,961 km) / (11,265 km/h) = 0.352 hour, or 21min 5.8sec 
to fly that distance? 

#3. A mail carrier walked six blocks to the north one block to the east ,
and then six blocks to the south.
After these three moves, the mail carrier's displacement is one block
to the East.</span>
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Answer:

decreases.

Explanation:

When the aircraft is flies from the warm air into the  colder air then its speed will be decreases.

as we know that

we know mach number is constant  

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The compound magnesium phosphate has the chemical formula Mg3(PO4)2. In this compound, phosphorous and oxygen act together as on
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The question is incomplete, the complete question is;

The compound magnesium phosphate has the chemical formula Mg3(PO4)2. In this compound, phosphorus and oxygen act together as one charged particle, which is connected to magnesium, the other charged particle. What does the 2 mean in the formula 5Mg3(PO4)2? A. There are two elements in magnesium phosphate. B. There are two molecules of magnesium phosphate. C. There are two magnesium ions in a molecule of magnesium phosphate. D. There are two phosphate ions in a molecule of magnesium phosphate.

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There are two phosphate ions in a molecule of magnesium phosphate.

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