NMAT Physics

D. Relatively large amounts of energy can be obtained from relatively small amounts of matter

Which of the following is an implication of the formula E=mc^2 A. Energy can be created from nothing B. Matter can be created from nothing C. Relatively large amounts of matter can be changed into relatively small amounts of energy D. Relatively large amounts of energy can be obtained from relatively small amounts of matter

D. Between F and the lens

4F - 3F - 2F - F Lens Screen No image is projected on the screen if a candle is placed A. At 2F B. At 3F C. Beyond 4F D. Between F and the lens

B. Longer

A - B Red ... Violet C - D ( Visible light ) Compare to the wavelengths of visible light, the wavelengths of the radiation in A and B are A. Shorter B. Longer C. Just as long D. Not measurable

D. The kinetic energy is minimum at the lowest point of its flight

A body thrown vertically up into the air possesses kinetic energy at the beginning of the flight, but as it rises, it loses kinetic energy and acquires potential energy with respect to the level from which it started. Which of the following is NOT likely to happen? A. When it reaches the highest point, the kinetic energy has been wholly changed to potential energy B. As it falls, its potential energy is again transformed to kinetic energy C. The potential energy is maximum at the highest point of its flight D. The kinetic energy is minimum at the lowest point of its flight

A. At the focus of the mirror

A certain solar cooker is made of a big concave mirror. To get the greatest amount of sunlight, where should the food be placed? A. At the focus of the mirror B. At the center of the curvature of the mirror C. Between the focus and the center of yhe curvature of the mirror D. Above the center of curvature of the mirror

B. It will begin to boil again since the condensation of the steam reduces the pressure inside

A glass flask which is partly filled with the watet is heated over a Bunsen flame. As soon as the water begins to boil, the flask is removed from the flame and tightly stoppered immediately. Boiling stops. When the cold water is poured on the surface of the flask, which of the following will happen to the water inside the flask? A. It will begin to boil again since the contraction of the flask reduces the pressure inside B. It will begin to boil again since the condensation of the steam reduces the pressure inside C. It will not boil since the temperature is less than 100 ° D. It will not boil since the contraction of the flask increases the pressure inside

A. It absorbs only yellow light

A lemon is colored yellow because A. It absorbs only yellow light B. It reflects only yellow light C. Only yellow light can pass through a yellow lemon D. Only yellow light actually hits the lemon

C. Directly proportional to the time

A man finds that he can walk 1 km in 20 min, 3 km in 1 hr, 6 km in 2hrs, 9 km in 3 hrs. These indicate that the distance he travels is A. Inversely proportional to the time B. Inversely proportional to the square of time C. Directly proportional to the time D. Directly proportional to the square of time

B. The specific heat of the cube

A metal cube is heated ina Bunsen flame and then dropped into an insulated beaker containing water. The masses of the water, the beaker, and the cube, the initial and final temperatures of the water, and the specific heat capacities of the water and the beaker are known. Without further measurements, which of the following can be calculated? A. The density of the cube B. The specific heat of the cube C. The thermal conductivity of the cube D. The specific latent heat of the cube

D. Velocity

A pingpong ball and a golf ball are dropped in a vaccum chamber from the same height and at the same time. When they have fallen halfway, they have the same A. Potential energy B. Kinetic energy C. Acceleration D. Velocity

I and III

Body X is in constant with Body Y which is hotter than Body X. Which of the following statements are true? I. Body X gains heat and Body Y loses heat II. The temperature of Body X decreases and the temperature of Body Y increases III. The temperature of Body X and Body Y will eventually be equal

D. Moderate current for a longer time

Electroplating results in a better quality product by applying a relatively A. Strong current for a shorter time B. Strong current for a longer time C. Moderate current for a shorter time D. Moderate current for a longer time

B. Increase 8 times

If the absolute temperature of a gas is guadrupled and its pressure is halved, then the volume will A. Increase 4 times B. Increase 8 times C. Decrease 4 times D. Decrease 8 times

D. Making use of the power of a waterfall

In hydroelectric plants, electric energy is generated by A. Making the water evaporate B. Distilling the water C. Changing the water chemically D. Making use of the power of a waterfall

1. C 2. D 3. A 4. B

Match: 1. Galvanometer 2. Generator 3. Transformer 4. Rectifier A. is a device that changes (transforms) an alternating potential difference (voltage) from one value to another value be it smaller or greater using the principle of electromagnetic induction B. is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction C. an instrument for detecting and measuring small electric currents D. a machine that converts one form of energy into another, especially mechanical energy into electrical energy, as a dynamo, or electrical energy into sound, as an acoustic generator

A

Positive A D Beam B C Negative A beam of electrons is directed between two charged plates, in which direction will the beam curve when it gets between the plates

C. Beta particle

The atomic reaction where 13/6^B becomes 13/7^C results in the release of A. Neutron B. Alpha particle C. Beta particle D. Gamma particle

A. Air

The immediate source of water which forms dew on grass on a summer morning is the A. Air B. Soil C. Grass D. Cloud

D. Orbital radius of the satellite, mass of the planet, and G

What are the factors that determine the speed of a satellite which moves in a stable orbit around a planet? (G represents the universal gravitational constant) A. Mass of the planet and G B. Mass of the satellite and G C. Mass of the satellite, mass of the planet and G D. Orbital radius of the satellite, mass of the planet, and G

B. The material becomes polarized

What happens when a dielectric material is placed in an electric field? A. The material becomes a conductor B. The material becomes polarized C. The material undergoes electrolysis D. The material remains electrically inert

B. Same as the original

When a large atom such as U^235 splits into two smaller atoms, then the combined mass of the products resulting from the splitting will be A. Half of the original mass B. Same as the original C. One half more than the original D. 2x more than the original

C. Speed

When waves are refracted, which property changes A. Frequency B. Period C. Speed D. Amplitudr

C. Raindrops act as prisms that separate into its components

Which of the following explains the appearance of a rainbow in the sky after a rainstorm? A. The white clouds are actually prisms composed of different colors B. Sunlight reflected by the ground separates into different colors in the sky C. Raindrops act as prisms that separate into its components D. None of these

C. Energy

Which of the following factors is responsible for transmitting waves? A. Amplitude B. Wavelength C. Energy D. Mass

A. Protons and electrons have equal masses

Which of the following statements is NOT true of protons and electrons? A. Protons and electrons have equal masses B. All protons have the same charge C. Protons and electrons have charges equal in magnitude although opposite in sign D. The positive charge in an atomic nucleus is due to the protons it contains

C. All isotopes are radioactive

Which of the following statements regarding isopotes is NOT true? A. Radioactive isotopes can be produced in the laboratory B. Radioactive isotopes decay by the emission of particles from the nucleus C. All isotopes are radioactive D. There is a wide variety of decay rates for radioactive isotopes

D. The spectrum produced will be wider

Which of the following will result if the number of lines in a diffraction grating of a given width is increased? A. The wavelength that can be diffracted will be shorter B. The wavelength that can be diffracted will be longer C. The spectrum produced will be narrower D. The spectrum produced will be wider