BMAT 2004-S2

The diagram shows a view from the front of a section through the heart and associated blood vessels.

The right-angled triangle shown has horizontal and vertical sides measuring (4 + √2) cm and (2 – √2) cm respectively.

(not to scale)

The equation summarises the reaction of copper and dilute nitric acid.

q Cu + r HNO₃ → s Cu(NO₃)₂ + 6 H₂O + t NO₂

The diagram shows a simplified version of the brake pedal of a car.

During the electrolysis of hydrochloric acid, positively charged hydrogen ions move towards the cathode at a rate of 10¹⁸ ions per second. Negatively charged chloride ions move towards the anode at the same rate. Both hydrogen and chloride ions carry charges of magnitude 1.6 × 10^-19 C.

The diagram shows a section through the thorax.

The table shows some properties of five substances A – E.

i. An inorganic substance with a giant molecular structure;

ii. A metal;

iii. An ionic compound;

iv. A liquid at room temperature and atmospheric pressure.

An oxide of tungsten contains 79.31% by mass of tungsten.

A ball is thrown vertically upwards and leaves the thrower’s hand with a speed of 12 m/s. Calculate the height to which it rises. You may assume that all of the initial kinetic energy of the ball has been converted into gravitational potential energy when the ball reaches its highest point. (Take the value of g to be 10 N/kg.)

The diagram shows two sets of parallel lines. Angles θ, α, β and γ are as marked.

One of the steps in the breakdown of glucose is the conversion of pyruvic acid, CH₃COCO₂H, into lactic acid, CH₃CH(OH)CO₂H.

The diagram shows a family tree.

The grandfather, individual 1, carries a recessive allele on his X chromosome.

Solve the inequality

x² ≥ 8 – 2x

Plugs of cotton wool containing concentrated aqueous ammonia and concentrated hydrochloric acid are placed at opposite ends of a tube, at room temperature.

A white ring of solid ammonium chloride forms nearer the hydrochloric acid.

In these circuits the cells are identical and their internal resistances can be ignored.

In 2001 a quarter of the population of Wales reported having a limiting long-term illness or disability which restricted their daily activities.

A parachutist of total mass 90 kg (including the parachute) is falling at a terminal velocity of 6 m/s. Take the force due to gravity on a mass of 1 kg to be 10 N.

The general formula for the alkane series of hydrocarbons is C_nH_2n+2

The primary amine series has the same saturated structure as the alkanes, but also contains an –NH₂ group.

The diagram shows three sperm and three ova containing sex chromosomes X and Y (not drawn to scale).

Which one of the following is not a measure of electrical power? 

(V = potential difference, I = current, Q = charge, t = time, R = resistance)

Which blood vessel will have capillaries at both ends?

Nuclide P decays by emission of ionising radiation to produce nuclide Q. This new nuclide then decays by further emission into nuclide R. The process is shown below, with the appropriate mass numbers (nucleon numbers) and atomic numbers (proton numbers).

^A_Z P→_Z+^A₁ Q→_Z−^X₁ R

In water, the Fe²⁺ ion bonds with water to form Fe(H₂O)₆²⁺. In haemoglobin in the blood, five of the water molecules have been displaced. In the presence of air, the last water molecule is displaced by oxygen to give oxyhaemoglobin. In the presence of carbon monoxide, the oxygen is displaced to give carboxyhaemoglobin.

weakest →  strongest

The diagram shows the leg muscles of an athlete leaving the starting blocks for a race.

For a rigid body performing small oscillations about a fixed horizontal axis, the period of oscillations is given by

where h is the distance of the centre of mass from the axis, g is the acceleration due to gravity, and k is the radius of gyration of the body about a parallel axis through the centre of mass.

The list below describes some events that occur during nuclear division.

i. Daughter nuclei are identical to parent nucleus

ii. All chromosomes are replicated

iii. Leads to the formation of gametes

iv. Two haploid nuclei are formed

v. Genetic material appears as distinct chromosomes

The sum of the roots of a quadratic equation is 7, the product of the roots is 9.