The Red Sea is widening at a rate of 1.25 centimeters per year. How many years will it take to widen another 812.5 centimeters?

What did Rutherford’s model of the atom include that Thomson’s model did not have?

Ksivusya [100]

Rutherford overturned Thomson's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus. Rutherford designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.

3 0

3 years ago

Which stage of shock encompasses mechanical ventilation, altered level of consciousness, and profound acidosis?

bixtya [17]

Answer:

It is considered as the last phase of the shock when the patient become stupor and needs a life support of mechanical ventilation. It's called the irreversible shock as it leads to the failure of organ or a death of a patient.

Explanation:

8 0

3 years ago

A car is moving at a constant speed of 14 m/s when the driver presses down on the gas pedal and accelerates for 14 s with an acc

Vinil7 [7]

acceleration of car is 1.8 m/s^2

time = 14 s

initial speed = 14 m/s

so the final speed is calculated by

$v_f = v_i + at$

$v_f = 14 + 14 * 1.8$

$v_f = 39.2 m/s$

so the total distance moved in this interval of time is

$d = \frac{v_f + v_i}{2}* t$

$d = \frac{39.2 + 14}{2}* 14$

$d = 372.4 m$

now the average speed is given as

$v = \frac{d}{t}$

$v = \frac{372.4}{14}$

$v = 26.6 m/s$

so the average speed will be 26.6 m/s

7 0

3 years ago

True or False: Any wavelength of light would work for this experiment. Explain your response, including the term quantum or quan

emmainna [20.7K]

Answer:

I think false I don't know if I right but I hoped this help

6 0

3 years ago

It is well known that for a hollow, cylindrical shell rolling without slipping on a horizontal surface, half of the total kineti

miskamm [114]

<u>The fraction of the total kinetic energy that is rotational for a uniform sphere is</u><u> 1/3.</u>

<h3>What is kinetic energy?</h3>

Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

Option (a) $f = \frac{0.5}{1.5} = \frac{1}{3}$

Option (b) uniform sphere

$f = \frac{2}{7}$

C) uniform hollow sphere

$f = \frac{2}{5}$

D) uniform hollow cylinder with inner radius R/2 and outer radius R

$f = \frac{5}{13}$

that fraction of total energy as rotational energy is given as

$f = \frac{\frac{1}{2}Iw^{2} }{\frac{1}{2}mv^{2} + \frac{1}{2} Iw^{2} }$

$f = \frac{m k^{2}(\frac{v^{2} }{R^{2} }) }{mv^{2} + m k^{2}(\frac{v^{2} }{R^{2} } )}$

$f = \frac{\frac{k^{2} }{R^{2} } }{1 + \frac{k^{2} }{R^{2} } }$

A) uniform Solid cylinder for cylinder we know that

$\frac{k\\ ^{2} }{R^{2} }$ = 0.5

$f = \frac{0.5}{1.5} = \frac{1}{3}$

B) uniform Sphere for sphere we know that

$\frac{k^{2} }{R^{2} } = \frac{2}{5} \\$

$f = \frac{0.4}{1.4} = \frac{2}{7}$

C) uniform hollow sphere for hollow sphere we know that

$\frac{k^{2} }{R^{2} } = \frac{2}{3}$

$f = \frac{\frac{2}{3} }{\frac{5}{3} } = \frac{2}{5}$

D) uniform hollow cylinder with inner radius R/2 and outer radius R for annular cylinder

$\frac{k^{2} }{R^{2} } = \frac{5}{8}$

$f = \frac{\frac{5}{18} }{\frac{13}{8} } = \frac{5}{13}$

Learn more about kinetic energy

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<u />

<u>The complete question is -</u>

It is well known that for a hollow, cylindrical shell rolling without slipping on a horizontal surface, half of the total kinetic energy is translational and half is rotational. What fraction of the total kinetic energy is rotational for the following objects rolling without slipping on a horizontal surface?Part AA uniform solid cylinder.Part BA uniform sphere.Part CA thin-walled hollow sphere.Part DA hollow, cylinder with outer radius R and inner radius R/2.

4 0

2 years ago