General Science Mixed Quiz: Set 185

A kilogram-metre per second squared is mass times acceleration, which is force; it is the newton, not a unit of energy.

Rice is Oryza sativa, a member of the grass family, and the epithet sativa, meaning cultivated or sown, marks it as a crop raised by farmers rather than a wild species.

For a real object anywhere in front of it, a convex mirror always gives a virtual, erect and diminished image.

Nephology is the study of clouds, their formation, classification into types such as cirrus, cumulus and stratus, and their part in rainfall, and it is a branch of meteorology, the science of the atmosphere and the weather.

Sound needs a material medium to travel, and in air its particles vibrate back and forth along the direction the wave moves.

In anodizing the clean aluminium article is indeed the anode, but oxygen is released at the anode, not at the cathode; hydrogen is released at the cathode.

For three equal resistors R in parallel, 1/Rp = 1/R + 1/R + 1/R = 3/R, so Rp = R/3.

A rod standing upright on one end falls over at the slightest push, because its centre of gravity is high and its base is tiny.

Two trends of the periodic table decide the order. Going down a group, atomic radius increases because each new period adds an electron shell; so sodium, in period 3, is larger than lithium, in period 2, of the same group 1.

The correct answer is A, Karl von Frisch, who decoded the dance language of bees: a round dance for a source near the hive and a waggle or tail-wagging dance for a distant one, in which the angle of the straight run shows the direction of the food relative to…

In the Brønsted–Lowry theory an acid is any substance that gives away a proton, that is a hydrogen ion (H⁺), to another substance.

For a swinging pendulum, the component of the bob's weight along its path always pulls it back towards the lowest point, so gravity acts as a restoring force.

Coating iron or steel with a thin layer of zinc is called galvanisation, and it is the most common way to protect them from rusting.

A beam seen from the side is visible only because tiny particles send some of its light sideways. Light travelling in a straight line cannot enter our eyes unless something redirects it towards us.

The endoplasmic reticulum (ER) is a network of membrane tubes and sacs inside the cell. Part of it is studded on the outside with tiny granules called ribosomes, which give it a dotted, rough look under an electron microscope; this part is the rough ER.

Egg white is mostly water and protein, and heat denatures these proteins so that they set into an opaque white solid.

Blood pressure is written as two numbers, and normal adult blood pressure is about 120/80 mm of mercury.

Vitamin B1 is the chemical called thiamin (also spelt thiamine), the first of the B-complex vitamins to be identified. Thiamin is a water-soluble vitamin that helps the body turn carbohydrates into energy and keeps nerves and the heart working properly.

A sphygmomanometer has an inflatable cuff wrapped around the upper arm, a rubber bulb to pump air into it, and a gauge, traditionally a column of mercury.

Red light has the longest wavelength in the visible spectrum, so glass slows it the least and bends it the least.