PHYSICS HIGH SCHOOL

a train is moving at 4.0 km/h. It accelerates at 60 km/h/s for 0.75 h. What is its speed by the of the 0.75 h

Answers

Answer 1
Answer:

Answer:

49 km/h

Explanation:

60 km/h acceleration for 0.75 hours.

60 × 3/4 = 45 km/h

Take the acceleration and add it to the speed the train was already moving at:

45 + 4 = 49km/h

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Answers

1. Mary Cover-Jones 

2.Knowing the formula for water and table salt is an example of episodic memory.    so d

3.Hippocampus


Answer:

1) Mary Cover-Jones

2) episodic

3) hippocampus

Hope this helped man!

Manuel releases a pendulum bob. The drawing shows its path. After the pendulum bob is released, how does the kinetic energy change?A.
It does not change.

B.
From C to D, it increases.

C.
From C to D, it decreases.

D.
It continues to increase as it swings back and forth.

Answers

From C to D, it increases.

What is the magnetic field strength is a 45000 kgaircraft is accelerated to 260 kg/hr

Answers

lets calculate the kinetic energy:

ek = (1/2)*45000*(260*1000/3600)^2 = 117.36 x 10^6 J

from the definition of magnetic force we have:
F = Bqv 
where F is the force, B is the magnetic field, q is the charge of the body, v i s velocity of the body.

The aircraft is going through a circular motion with radius equal to the radius of the earth plus the aircraft altitude, lets call all that radious r, therefore the aircraft feels a centripetal force:

F = mv^2/r

hence we can equal the magnetic and centripetal force:

Bqv = mv^2/r

we can solve for the magnetic field:

B = mv/rq

hence the intensity of the strength of the magnetic field is expressed in terms of the amount of charge q contained in the aircraft and the total radius of the circular motion.

B = (45000)(260*1000/3600)/rq

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Answers

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Answers

FULL ANSWER

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Answers

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