3 years ago

The ability to do work is O efficiency energy power

Physics

1 answer:

Serggg [28]3 years ago

4 0

Answer:

The ability to do work is energy

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C or D

Explanation:

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An object moving with initial velocity 10 m/s is subjected to a uniform acceleration of 8 m/s ^² . The displacement in the next

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he nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particle

12345 [234]

Answer:

A) F = 21.134 N

B) a = 3180.76 × 10^(24) m/s²

Explanation:

A) We are given;

Mass of alpha particle; m = 4.0026 u

Now, 1u = 1.66 × 10^(-27) kg

Thus; m = 4.0026 × 1.66 × 10^(-27)

Distance apart; r = 6.60 × 10^(−15) m

Charge on the alpha particle is;

q = 2e = 2 × 1.6 × 10^(-19) C

Formula for the force between the two alpha particles is;

F = kq1.q2/r²

k = 8.99 × 10^(9) N.m²/C²

q1 = q2 = 2 × 1.6 × 10^(-19) C

F = 8.99 × 10^(9) × (2 × 1.6 × 10^(-19))²/(6.60 × 10^(−15))²

F = 21.134 N

B) acceleration is given by;

a = F/m

Thus; a = 21.134/(4.0026 × 1.66 × 10^(-27))

a = 3180.76 × 10^(24) m/s²

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3 years ago

DISPLACEMENT WITH CONSTANT ACCELEration. Given information: displacement=64m, acceleration=9.81m\s and time interval=3s. calcula

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3 years ago

A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 x 10^-3 kg∙m2 is suspended from the ceiling. A rope passes over

solmaris [256]

Answer:

maximum kinetic energy is for Pulley

e) The pulley

Explanation:

Let 4 kg block is moving downwards with speed "v" so we can say that 2 kg block will move upwards with same speed "v"

Now we know that pulling is in pure rotational motion

so we will have

$\omega = \frac{v}{R}$

$\omega = \frac{v}{0.03}$

now kinetic energy of each is given as

For 4 kg block

$K_1 = \frac{1}{2}(4)(v^2) = 2v^2$

for 2 kg block

$K_2 = \frac{1}{2}(2)(v^2) = v^2$

For pulley

$K_3 = \frac{1}{2}I\omega^2$

$K_3 = \frac{1}{2}(4.5\times 10^{-3})\frac{(v^2)}{0.03^2}$

$K_3 = 2.5 v^2$

So maximum kinetic energy is for Pulley

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3 years ago