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amid [387]
3 years ago
14

-A city and an international airport are 46 km away from each other. A maglev train takes 11

Physics
1 answer:
Wittaler [7]3 years ago
7 0

Answer:

Explanation:

Given the following data;

Distance = 46 km

Time = 11 minutes

To find the average speed;

Speed = distance/time

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Resultant vector of a force gives us information regarding ___________ of resultant force.
qaws [65]

Answer: direction

Explanation:

Given

The resultant vector of a force gives us information regarding the direction of the resultant force.

If there are multiple forces acted in a different direction then, the resultant vector describes the direction of the resultant force.

5 0
3 years ago
A 1200 kg car is brought from 25 m/s to 10m/s over a time period of 5 seconds. Determine the force experienced by the car
aleksklad [387]
It's simple.
We know force is the rate of change in momentum.
So F=(mv-mu)/t or F=m(v-u)/t
=1200*(25-10)/5=3600N
7 0
3 years ago
What would happen to the brightness of the bulbs if the switch was opened​
jeka57 [31]
When the switch is open then no current can flow, on the other hand, when it is closed, current will pass through. When only “bulb a” is connected to the battery then more current is flowing to “bulb a” causing it to be bright. So the light of “bulb a” will be dimmer.
6 0
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vovikov84 [41]

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6 0
3 years ago
Suppose that a merry-go-round, which can be approximated as a disk, has no one on it, but it is rotating about a central vertica
seropon [69]

Answer:

0.1 rev/s

Explanation:

M = mass of the merry go round = 200 kg

R = radius of merry go round = 6 m

I_{o} = Moment of inertia of merry go round = (0.5) MR² = (0.5) (200) (6)² = 3600 kgm²

m = mass of the man = 100 kg

I_{f} = Moment of inertia of merry go round when man sits on it at the edge = (0.5) MR² + mR² = (0.5) (200) (6)² + (100) (6)² = 7200 kgm²

w_{o} = initial Angular speed of merry-go-round before man sit = 0.2 rev/s

w_{f} = Angular speed of merry-go-round after man sit = ?

Using conservation of angular momentum

I_{o} w_{o} = I_{f} w_{f}

(3600) (0.2) = (7200) w_{f}

w_{f} = 0.1 rev/s

4 0
4 years ago
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