Which one of the following is an example of an indicator?

A motor running at 2600 rev/min is suddenly switched off and decelerates uniformly to rest after 10 s. Find the angular decelera

Mama L [17]

Angular acceleration = (change in angular speed) / (time for the change)

change in angular speed = (zero - 2,600 RPM) = -2,600 RPM

time for the change = 10 sec

Angular acceleration = -2600 RPM / 10 sec = -260 rev / min-sec

(-260 rev/min-sec) x (1 min / 60 sec) = <em>-(4 1/3) rev / sec²</em>

Since the acceleration is negative, the motor is slowing down.
You might call that a 'deceleration' of (4 1/3) rev/sec² .

The average speed is 1/2(2,600 + 0) = 1,300 rev/min = (21 2/3) rev/sec.

Number of revs = (average speed) x (time) = (21 2/3) x (10sec) = <em>(216 2/3) revs</em>

6 0

3 years ago

Which activity would be the best choice foir a lifelong fitness program

Fantom [35]

I think jogging/running/walking because you don't need any equipment and you can structure around it on your own time.

7 0

2 years ago

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Which of the following weighing balances performs measurement in a closed compartment with no air currents to disturb measuremen

padilas [110]

Out of the following choices given, hydraulic balances performs measurement in a closed compartment with no air currents to disturb measurement. The correct answer is C.

6 0

3 years ago

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A student uses the right-hand rule as shown.

Kipish [7]

Answer:

right is the correct answer to the given question .

Explanation:

In this question figure is missing

The main objective right-hand rule to decide the position of the magnetic force on the positive force acting, either the position of the thumb of a right hand with in position of v, the fingers throughout the position of B1, and a right angles throughout the position of F1 to the hand positions.

So $F1 \ =\ q\ v \ B1\ Sin\alpha$

So from the magnetic right hand rule the direction of the magnetic field in front of a wire is right .
All the others options are incorrect because they do not give the direction of the magnetic field in front of a wire is right .

5 0

2 years ago

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a hockey player of mass 82 kg is traveling north with a velocity of 4.1 meters per second he collides with the 76 kg player trav

ratelena [41]

mass of first player = 82 kg

speed of first player = 4.1 m/s (towards North)

mass of second player = 76 kg

speed of second player = 3.4 m/s (towards East)

now the two players will collide and stick together so here since there is no external force on the system of two players so we will say momentum of system of players will remain conserved

So here we will have

$P_{1i} = 82 (4.1 \hat j)$