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3 years ago

7

Physics

2 answers:

borishaifa [10]3 years ago

6 0

Answer:

True

Explanation: No they can't be overturned no lower court can not even congress or the president can change or reject The supreme Court system.

emmasim [6.3K]3 years ago

4 0

Answer:

false

Explanation:

the president can over turn any ruling made by any governing body not just the supreme court

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A 90.0-kg man runs at a constant speed of 11.5 m/s. what is his kinetic energy?

harina [27]

The kinetic energy possessed by the man is 517.5 Joules.

Given the following data:

Mass = 90.0 kg

Velocity = 11.5 m/s.

To find the kinetic energy of the man:

Kinetic energy is an energy that is possessed by a physical object or body due to its motion.

Mathematically, kinetic energy is calculated by using the formula;

$K.E = \frac{1}{2} MV^2$

Where:

K.E is the kinetic energy.

M is the mass of an object.

V is the velocity of an object.

Substituting the given values, we have;

$K.E = \frac{1}{2}$ × $90$ × $11.5$

$K.E = 45$ × $11.5$

Kinetic energy = 517.5 Joules.

Therefore, the kinetic energy possessed by the man is 517.5 Joules.

8 0

3 years ago

Help please…………………,,,,,

Sever21 [200]

Answer:

*insert smrt science stuff here*

Explanation:

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5 0

3 years ago

A 41.0 kg child swings in a swing supported by two chains, each 2.98 m long. (a) If the tension in each chain at the lowest poin

Alex777 [14]

Answer:695.5 N

Explanation:

mass of child $m=41 kg$

Length of chain $L=2.98 m$

Tension in each chain $T=348 N$

(a)Tension at bottom point $T=348 N$

At lowest Point

$T+T-mg=\frac{mv^2}{L}$

$2T-mg=\frac{mv^2}{L}$

$2\times 348-41\times 9.8=\frac{41\times v^2}{2.98}$

$v^2=\frac{294.2\times 2.98}{41}$

$v=\sqrt{21.38}=4.62 m/s$

(b)Force exerted by Seat will be Equal to Normal reaction

$N-mg=\frac{mv^2}{L}$

$N=mg+\frac{mv^2}{L}$

$N=41\times 9.8+\frac{41\times 21.38}{2.98}$

$N=695.95 N$

8 0

3 years ago

Potential energy and kinetic energy are created when work is done to change a position (PE) or a state of motion (KE). Ignoring

lapo4ka [179]

Answer:

(b) Both are the same

Explanation:

When work is done to change a position or a state of motion, then the potential and kinetic energy are created. Then the energy gets transferred to an object. Its means the work is done.

The work done to change a position of an object is called potential energy while the work done to change a state of motion of an object is called kinetic energy.

We know that the total energy of a system remains constant. It is called the law of conservation of energy.

So, the work done is equal to the amount of PE or KE created. Hence, the correct option is (b).

3 0

4 years ago

Leslie is investigating which brand of cell phone has the longest lasting battery.

Sergeeva-Olga [200]

Explanation:

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6 0

3 years ago

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