Who said this about alpha particles and the reflection of these particles from thin foils? "It was about as credible as if you fired a 15-inch shell at a piece of tissue paper and it came back at you."

Who said this about alpha particles and the reflection of these particles from thin foils? "It was about as credible as if you fired a 15-inch shell at a piece of tissue paper and it came back at you." 
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ANSWER: RUTHERFORD
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In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the following conclusions. It was concluded that: w) the charge of an electron is negative x) the nucleus of a gold atom carries all its charge y) most of the mass of a gold atom is in its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom

Description : In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the ... its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom

Last Answer : ANSWER: Y -- MOST OF THE MASS OF A GOLD ATOM IS IN ITS NUCLEUS

oining of thin foils is preferred to be done by (A) Gamma rays (B) X-rays (C) Microwaves (D) Gas welding

Description : oining of thin foils is preferred to be done by (A) Gamma rays (B) X-rays (C) Microwaves (D) Gas welding

Last Answer : Option C

Joining of thin foils is preferred to be done by (A) Gamma rays (B) X-rays (C) Microwaves (D) Gas welding

Description : Joining of thin foils is preferred to be done by (A) Gamma rays (B) X-rays (C) Microwaves (D) Gas welding

Last Answer : Option C

Where did most of the alpha particles fired at the foil go in the gold foil experiment?

Description : Where did most of the alpha particles fired at the foil go in the gold foil experiment?

Last Answer : Most of them went right through.

In 1909 Ernest Rutherford conducted an experiment in which he fired alpha particles at a sheet of gold foil. What unexpected result did he get?

Description : In 1909 Ernest Rutherford conducted an experiment in which he fired alpha particles at a sheet of gold foil. What unexpected result did he get?

Last Answer : What is the answer ?

Golden view of sea shell is due to - (1) Diffraction (2) Dispersion (3) Polarization (4) Reflection

Description : Golden view of sea shell is due to - (1) Diffraction (2) Dispersion (3) Polarization (4) Reflection

Last Answer : (3) Polarization Explanation: When a ray of light falls on sea shell, its small amount gets refracted (slightly polarized) and rest almost gets reflected back (fully polarized). So it gets a golden view because of polarization.

Golden view of sea shell is due to (1) Diffraction (2) Dispersion (3) Polarization(4) Reflection

Description : Golden view of sea shell is due to (1) Diffraction (2) Dispersion (3) Polarization(4) Reflection 

Last Answer : Polarization

Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is found to be: w) zero x) uniform inside the sphere and equal to the electric potential on the surface of the sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared.

Description : Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is found to be: w) zero x) uniform ... sphere y) smaller than the electric potential outside the sphere z) varying as one over r squared.

Last Answer : ANSWER: X -- UNIFORM INSIDE THE SPHERE AND EQUAL TO THE ELECTRIC OTENT

The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

Description : The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

Last Answer : (4) Multiple reflection and interference Explanation: Light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.

The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

Description : The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference

Last Answer : (4) Multiple reflection and interference Explanation: Light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.

A thin oil film on a water surface appears coloured because of – (1) reflection (2) interference (3) diffraction (4) polarization

Description : A thin oil film on a water surface appears coloured because of – (1) reflection (2) interference (3) diffraction (4) polarization

Last Answer : (2) interference Explanation: A thin oil film on a water surface appears coloured because of thin-film interference which involves the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface.

A thin oil film on a water surface appears coloured because of (1) reflection (2) interference (3) diffraction (4) polarization

Description : A thin oil film on a water surface appears coloured because of (1) reflection (2) interference (3) diffraction (4) polarization

Last Answer : interference

When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus `._(15)^(30)P` with the emission of …. Is formed

Description : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus `._(15)^(30)P` with the emission of …. Is formed

Last Answer : When `._(13)^(27)Al` is bombarded whith `alpha`-particles, a radioactive isotope of phosphorus ` ... A. neutrons B. protons C. positrons D. electrons

The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Description : The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Last Answer : (4) Alpha Particle Explanation: The formula for kinetic energy in terms of momentum for fundamental particles is basically just a quantized version of the classical formula, KE=(P^2)/2m, where KE is kinetic energy, p is momentum and m is the particle’s mass.

A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times

Description : A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times

Last Answer : ANSWER: X -- 2 TIMES

Alpha particles are nuclei of: w) hydrogen x) helium y) oxygen z) nitrogen

Description : Alpha particles are nuclei of: w) hydrogen x) helium y) oxygen z) nitrogen

Last Answer : ANSWER: X -- HELIUM

The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Description : The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Last Answer : Alpha Particle

Why shouldn't I use a 40 volume developer with foils?

Description : Why shouldn't I use a 40 volume developer with foils?

Last Answer : It might be too strong for the foils, too! Aluminium is thin!

How are Karen and her "new" sister-in-law foils for each other?

Description : How are Karen and her "new" sister-in-law foils for each other?

Last Answer : the Mondavi wine, or the Bolla wines or the Chianti made by Da Vinci or Bella Sera. ... Shrimp, crabs, scallops, calamari, conch and maybe a few other type fish. ... When it was finished she wrapped it in ... ... While in New York we will visit my Brother, Joseph and my sister-in-law, Karen and ...

An oil fired boiler is retrofitted to fire coconut shell chips. Boiler thermal efficiency drops from 82% to 70%. What will be the percentage change in energy consumption to generate the same output a) 12% increase b) 14.6% increase c) 17.1% decrease d) 17.1% increase

Description : An oil fired boiler is retrofitted to fire coconut shell chips. Boiler thermal efficiency drops from 82% to 70%. What will be the percentage change in energy consumption to generate the same output a) 12% increase b) 14.6% increase c) 17.1% decrease d) 17.1% increase

Last Answer : d) 17.1% increase

Suppose Rutherford had not seen any alpha particles deflected back from the gold foil. How would this most likely have affected scientific understanding of the structure of an atom?

Description : Suppose Rutherford had not seen any alpha particles deflected back from the gold foil. How would this most likely have affected scientific understanding of the structure of an atom?

Last Answer : It would have taken scientists longer to discover protons. A+

There is a lot of pain in the urinary tract. Want a solution ? I am 32 years old. For the last several days (approximately 10-15 days) I have noticed that my urinary tract is bitten and the urination is not as fast as it should be. Today, when I tried to check if any pus came out, I saw that it came out like a little thin water, it was not sticky and there was no color. What can I do now ? Is it gonorrhea ? Please let me know.

Description : There is a lot of pain in the urinary tract. Want a solution ? I am 32 years old. For the last several days (approximately 10-15 days) I have noticed that my urinary tract is bitten and the urination is ... not sticky and there was no color. What can I do now ? Is it gonorrhea ? Please let me know.

Last Answer : No, it is not gonorrhea, but if you do not take treatment now, you may have gonorrhea later, because you have a urinary tract infection . Enjoy. Drink more water. In the morning, on an empty stomach, eat Isubgul's bran syrup.

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50.How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50.How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper.

A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Description : A boy was at a carnival and went to a booth where a man said to the boy, 'If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50.' ... more or less. In the end the boy ended up paying the man $50. How did the man win the bet? -Riddles

Last Answer : The man did exactly as he said he would and wrote 'your exact weight' on the paper.

What is the answer of a boy was at a carnival and went to a booth where a man said to the boy If I write your exact weight on this piece of paper then you have to give me 50 but if I cannot I will pay?

Description : What is the answer of a boy was at a carnival and went to a booth where a man said to the boy If I write your exact weight on this piece of paper then you have to give me 50 but if I cannot I will pay?

Last Answer : The man did exactly as he said he would and wrote "your exact weight" on the paper.

A cylinder is said to be thin if the ratio of its thickness and diameter, is less than (A) 1/25 (B) 1/20 (C) 1/15 (D) 1/10

Description : A cylinder is said to be thin if the ratio of its thickness and diameter, is less than (A) 1/25 (B) 1/20 (C) 1/15 (D) 1/10

Last Answer : (D) 1/10

Firing glass in a kiln: can a piece be fired twice?

Description : Firing glass in a kiln: can a piece be fired twice?

Last Answer : Yes. Firing at these low temperatures doesn’t make any fundamental change in the structure of the glass.

The moment of inertia of a thin spherical shell is a.Mr2 b.1/2 Mr2 c.1/3 Mr2 d.2/3 Mr2 e.None of the above

Description : The moment of inertia of a thin spherical shell is a.Mr2 b.1/2 Mr2 c.1/3 Mr2 d.2/3 Mr2 e.None of the above

Last Answer : d. 2/3 Mr2

When a thin cylindrical shell is subjected to an internal pressure, there will be a) a decrease in diameter and length of the shell b) an increase in diameter and length of the shell c) an increase in diameter and decrease in length of the shell d) a decrease in diameter and increase in length of the shell

Description : When a thin cylindrical shell is subjected to an internal pressure, there will be a) a decrease in diameter and length of the shell b) an increase in diameter and length of the shell c) an ... and decrease in length of the shell d) a decrease in diameter and increase in length of the shell

Last Answer : b) an increase in diameter and length of the shell

In a thin shell which stress is negligible a) σh b) σl c) σr d) None

Description : In a thin shell which stress is negligible a) σh b) σl c) σr d) None

Last Answer : c) σr

Value of σr in a thin shell is a) pD/2t b) pD/4t c) pD/3t d) None

Description : Value of σr in a thin shell is a) pD/2t b) pD/4t c) pD/3t d) None

Last Answer : d) None

Longitudinal strain in a thin shell is a) σh /E b) σl /E c) σr /E d) None

Description : Longitudinal strain in a thin shell is a) σh /E b) σl /E c) σr /E d) None

Last Answer : d) None

Hoop strain in a thin shell is a) σh /E b) σl /E c) 3 σh /E d) None

Description : Hoop strain in a thin shell is a) σh /E b) σl /E c) 3 σh /E d) None

Last Answer : d) None

Which one is most important in a thin shell? a) d/t <20 b) d/t> 10 c) Stresses are uniform d) None

Description : Which one is most important in a thin shell? a) d/t 10 c) Stresses are uniform d) None

Last Answer : c) Stresses are uniform

Which is most predominant type of failure in a thin shell? a. Bearing failure b. Compression failure c. Crushing failure d. None

Description : Which is most predominant type of failure in a thin shell? a. Bearing failure b. Compression failure c. Crushing failure d. None

Last Answer : d. None

Design of a thin shell under pressure is done on the basis of a. Radial stress b. Longitudinal stress c. Hoop stress d. All the three stresses

Description : Design of a thin shell under pressure is done on the basis of a. Radial stress b. Longitudinal stress c. Hoop stress d. All the three stresses

Last Answer : c. Hoop stress

Stresses in a thin cylindrical shell under internal pressure is independent of a. Diameter b. Thickness c. Length d. Diameter and thickness

Description : Stresses in a thin cylindrical shell under internal pressure is independent of a. Diameter b. Thickness c. Length d. Diameter and thickness

Last Answer : c. Length

A thin spherical shell under internal pressure will fail under a. Maximum shear stress b. Principal compressive stress c. Principal tensile stress d. None

Description : A thin spherical shell under internal pressure will fail under a. Maximum shear stress b. Principal compressive stress c. Principal tensile stress d. None

Last Answer : c. Principal tensile stress

A thin cylindrical shell under internal pressure can fail by a. Shear b. Compression c. Tension d. None

Description : A thin cylindrical shell under internal pressure can fail by a. Shear b. Compression c. Tension d. None

Last Answer : c. Tension

Radial stress in a thin shell is given by a. pD/2t b. pD/4t c. pD/3t d. None

Description : Radial stress in a thin shell is given by a. pD/2t b. pD/4t c. pD/3t d. None

Last Answer : d. None

Among the cylindrical and spherical thin vessels of same material, diameter and pressure which has the lesser thickness a. Cylindrical shell b. Spherical shell c. Cylindrical shell with semi spherical heads d. None

Description : Among the cylindrical and spherical thin vessels of same material, diameter and pressure which has the lesser thickness a. Cylindrical shell b. Spherical shell c. Cylindrical shell with semi spherical heads d. None

Last Answer : b. Spherical shell

Which stress is the least in a thin shell a. Longitudinal stress b. Hoop stress c. Radial stress d. None

Description : Which stress is the least in a thin shell a. Longitudinal stress b. Hoop stress c. Radial stress d. None

Last Answer : c. Radial stress

Diffused reflection takes place through a) metal b)glass c)wood d)thin transparent sheet

Description : Diffused reflection takes place through a) metal b)glass c)wood d)thin transparent sheet

Last Answer : c)wood

A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum

Description : A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum

Last Answer : (4) They must be dropped in vacuum Explanation: When a piece of paper and a cricket ball are dropped from the same height, they reach the surface at different time because the shape of the paper ... occurring on them and this leads to a conclusion that both the article reaches at the same time.

A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum

Description : A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously ? (1) They must have the same volume (2) They must have the same density (3) They must have the same mass (4) They must be dropped in vacuum

Last Answer : They must be dropped in vacuum

Alpha Particles What ?

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Alpha particles are________charged.

Description : Alpha particles are________charged.

Last Answer : Alpha particles are________charged.

In the disintegration of a radioactive element, `alpha` and `beta`-particles are evolved from the nucleus: `._(0)^(1)n to ._(1)^(1)H + ._(-1)^(0)e` +

Description : In the disintegration of a radioactive element, `alpha` and `beta`-particles are evolved from the nucleus: `._(0)^(1)n to ._(1)^(1)H + ._(-1)^(0)e` +

Last Answer : In the disintegration of a radioactive element, `alpha` and `beta`-particles are evolved from ... of `gamma`-radiations may yield nuclear isomer