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2 years ago

Muscles convert chemical energy into A) light energy. B) nuclear energy. C) mechanical energy. D) electromagnetic energy.

Physics

2 answers:

hoa [83]2 years ago

7 0

The muscles convert the stored chemical energy into mechanical energy

pshichka [43]2 years ago

3 0

Answer:

The correct answer would be C) mechanical energy.

The muscles harness the energy from the food that is, the chemical energy and convert it into the ATP (adenosine triphosphate) which is also a chemical energy.

The ATP are then used by the muscles as the source of energy for the movements such as locomotion that is, mechanical energy.

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A puck moves 2.35 m/s in a -22 degree direction. A hockey stick pushes it for 0.215 s, changing its velocity to 6.42 m/s in a 50

Whitepunk [10]

Answer:

Displacement in Y direction is 0.434 m

Explanation:

initial velocity of the puck is 2.35 m/s at -22 degree

so here it is given as

$v_i = 2.35 cos22 \hat i - 2.35 sin22 \hat j$

$v_i = 2.18 \hat i - 0.88 \hat j$

final velocity is given as 6.42 m/s at 50 degree

so we have

$v_f = 6.42 cos50 \hat i + 6.42 sin50\hat j$

$v_f = 4.13 \hat i + 4.92\hat j$

now displacement in Y direction is given as

$\Delta y = \frac{v_f + v_i}{2}t$

$\Delta y = \frac{-0.88 + 4.92}{2} (0.215)$

$\Delta y = 0.434 m$

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3 years ago

I REALLY NEED HELP PLEASE!!! CAN SOMEONE ANSWER THIS? At 0 ºC, some amount of energy is required to change 1 kg of water from a

Nezavi [6.7K]

Answer:

C)It would require more energy to change solid water into liquid water because there are more molecules in this larger piece of ice.

8 0

2 years ago

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99% of all the matter that can be observed in the universe exists as

Temka [501]

Has mass and occupied space

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3 years ago

Over the past 100 years earths temperature

pogonyaev

Answer:

<u>Over the last century, the average surface temperature of the Earth has increased by about 1.0o F.</u>

Explanation:

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3 0

2 years ago

A mass m = 3.9 kg hangs from a massless string wrapped around a uniform cylinder with mass Mp = 10.53 and radius R= 0.96 m. The

luda_lava [24]

Answer:

the rotational inertia of the cylinder = 4.85 kgm²

the mass moved 7.942 m/s

Explanation:

Formula for calculating Inertia can be expressed as:

$I =\frac{1}{2}mR^2$

For calculating the rotational inertia of the cylinder ; we have;

$I = \frac{1}{2}m_pR^2$

$I = \frac{1}{2}*10.53*(0.96)^2$

$I=5.265*(0.96)^2$

$I=4.852224$

I ≅ 4.85 kgm²

mg - T ma and RT = I ∝

T = $\frac{Ia}{R^2}$

$a = \frac{g}{1+\frac{I}{mR^2}}$

$a = \frac{9.8}{1+\frac{4.85}{3.9*(0.96)^2}}$

a = 4.1713 m/s²

Using the equation of motion

$v^2 = u^2+2as \\ \\ v^2 = 2as \\ \\ v = \sqrt{2*a*s} \\ \\ v= \sqrt{2*4.1713*7.56} \\ \\ v = 7.942 \ m/s$

3 0

2 years ago

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