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3 years ago

True or False: An example of an Isometric movement is a plank. please help 2 mins left! PE

Physics

2 answers:

gtnhenbr [62]3 years ago

6 0

Answer: The answer is true:)

Anon25 [30]3 years ago

5 0

Answer:

Yes

Explanation:

The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time

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Scientific work is currently underway to determine whether weak oscillating magnetic fields can affect human health. For example

nlexa [21]

Answer:

The maximum emf that can be generated around the perimeter of a cell in this field is $1.5732*10^{-11}V$

Explanation:

To solve this problem it is necessary to apply the concepts on maximum electromotive force.

For definition we know that

$\epsilon_{max} = NBA\omega$

Where,

N= Number of turns of the coil

B = Magnetic field

$\omega =$ Angular velocity

A = Cross-sectional Area

Angular velocity according kinematics equations is:

$\omega = 2\pi f$

$\omega = 2\pi*61.5$

$\omega =123\pi rad/s$

Replacing at the equation our values given we have that

$\epsilon_{max} = NBA\omega$

$\epsilon_{max} = NB(\pi (\frac{d}{2})^2)\omega$

$\epsilon_{max} = (1)(1*10^{-3})(\pi (\frac{7.2*10^{-6}}{2})^2)(123\pi)$

$\epsilon_{max} = 1.5732*10^{-11}V$

Therefore the maximum emf that can be generated around the perimeter of a cell in this field is $1.5732*10^{-11}V$

6 0

4 years ago

Which describes the adiabatic process? Check all that apply.

kiruha [24]

Answer:

heat is not absorbed by the system

A rapid shift occurs between gas compression and expansion.

All heat is transformed to work done by the system.

Explanation:

7 0

4 years ago

Read 2 more answers

If a person is walking along at 1.4m/s. How long will it take that person to walk one time around a high school track?

ratelena [41]

Answer:

285.7s

Explanation:

Given parameters:

Speed of the person = 1.4m/s

Unknown:

Time it takes to walk one time round the track = ?

Solution:

The circumference of the track is 400m for a standard pitch.

Now;

Speed = $\frac{distance}{time}$

Time = $\frac{distance }{speed }$

Now insert the parameters;

Time = $\frac{400}{1.4}$ = 285.7s

8 0

3 years ago

when water boils, it becomes steam .its particles spread out and occupy a greater volume. has its density increased or decreased

Deffense [45]

The density has decreased

6 0

4 years ago

Read 2 more answers

when the elevator is moving upwards but its slowing to a stop at the top floor. what is the direction of the net force on the ri

Zielflug [23.3K]

Answer:Downward

Explanation:

As elevator is moving upward but is decelerating to stop at top

Suppose mg is the weight of man

N is the normal reaction

a is the acceleration

$F_{net}=N-mg=m(-a)$

here upward direction is positive while downward direction is negative

Therefore net force is in downward direction

8 0

4 years ago