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HSP511S - HEALTH SCIENCE PHYSICS - 1ST OPP - JUNE 2023 |
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n Am I BI A u nl VER s ITY
OF SCIEnCE Ano TECHnOLOGY
FACULTY OF HEALTH, NATURAL RESOURCES AND APPLIED SCIENCES
SCHOOL OF NATURAL AND APPLIED SCIENCES
DEPARTMENT OF BIOLOGY, CHEMISTRY AND PHYSICS
QUALIFICATION : BACHELOROF HUMAN NUTRITION
BACHELOROF ENVIRONMENTALHEALTHSCIENCES
BACHELOROF HEALTHINFORMATIONSYSTEMSMANAGEMENT
BACHELOROF MEDICALLABORATORYSCIENCES
QUALIFICATION CODE: 08BOHN,
08BOHS, 07BHIS, 08BBMS
LEVEL: 5
COURSE CODE: HSP511S
COURSE NAME: HEALTH SCIENCE PHYSICS
SESSION: JUNE 2023
PAPER: THEORY
DURATION: 3 HOURS
MARKS: 100
FIRST OPPORTUNITY EXAMINATIONS QUESTION PAPER
EXAMINER(S}
MODERATOR:
DR VAINO IN DONGO
PROF. DIPTI SAHU
INSTRUCTIONS:
1. Answer all the questions in the booklet provided
2. Show clearly all the steps used in the calculations
3. All written work MUST be done in blue or black ink and sketches must be
done in pencils.
PERMISSIBLE MATERIALS
Non-Programmable Calculator
THIS PAPER CONSISTS OF 7
{INCLUDING THIS FRONT PAGE}
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SECTION A
[40]
QUESTION 1
(40)
Multiple choice questions types: Each question carries two marks
1.1 The dimensions of Volume are given by;
(2)
A L3
B. L 2 T 2
C. dimensionless D. MLT - 1
1.2 ............... is the unit of impulse.
(2)
AW
B. Hz
C. Ns
D. NS
1.3 One of these is the dimension of force.
(2)
A ML2
B. MLT- 1
C. M 2T 2
D. MLr- 2
1.4
is a unit of force.
(2)
A. kg.m/s 2
B. kg
C. m/s
D. cm3
1.5Which of the following physical quantity is dimensionless?
(2)
A. Angle
B. Strain
c. Specific gravity
D. All of the above
1.6The dimensional formula of angular velocity is ........... .
(2)
A. MLT
B. MLT2
C. MDLor-1
D. M-1LT-1
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1.?The dimensions of WORK are;
(2)
A. MLT
B. ML2T-2
C. MLT-1
D. ML2T-1
1.8The rate of change of displacement of a particle is referred to as ... ... ... ... ... (2)
A. speed
B. velocity
c. acceleration
D. power
1.9Which of the following is a physical quantity that has a magnitude but no
direction?
(2)
A. Vector
B. Frame of reference
c. Resultant
D. Scalar
1.10 The difference between speed and velocity is:
(2)
A. speed has no units
B. they use different units to represent their magnitude
C. speed shows only magnitude, while velocity represents both magnitude
(strength) and direction
D. velocity has a higher magnitude
1.11 A dot product of any two vectors gives a
(2)
A. vector
B. vector and scalar
C. scalar
D. unit vector
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1.12 ____
is the rate of change of energy?
(2)
A. Work
B. Power
c. Frequency
D. Viscosity
1.13 The forces of 20 N towards north and 12 N towards south are acting on
an object. What will be resultant force?
(2)
A 32 N toward north
B. 20 N towards north
C. 32 N towards south
D. 8 N towards north
1.14 A steel bar is precisely 1.6 m at 25° C. At what temperature will its length
be 1.4 mm longer? [a= 9.0 X 10- 6 / 0 C]
(2)
C. 48°K
1.15 When a liquid freezes to become a solid:
(2)
A it absorbs energy
C. its temperature decreases
B. its temperature increases
D. it emits energy
1.16 How much heat is required to raise the temperature of a 0.04 kg stainless
steel cup from 20°C to 50°C if the specific heat capacity of stainless
steel is 0.50 kJ / kg.°C.
(2)
A 200 J
B. 400 J
C. 800 J
D. 1000 J
1.17 ............. Is a vector that is tangential to path of an object in a circle:
(2)
A angular force
C. centripetal velocity
B. centripetal acceleration
D. centripetal force
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1.18 When the rate of increase of velocity is constant, we say
has occur:
(2)
A. deceleration
B. acceleration
C. uniform retardation
D. uniform acceleration
1.19 Which of these statements is not true about why weight varies?
(2)
A. due to rotation of the earth about its axis
B. due to constant in density of earth
C. due to elliptical shape of the earth
D. due to variation in latitude
1.20 Whenever a liquid is touched slightly, small ripples run across the surface.
This statement is an evidence of ... ...... .............
(2)
A. surface tension
B. capillarity
C. angle of contact
D. proxy
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SECTION B
[60]
QUESTION 2
(18)
2.1 Briefly differentiate between the following terms with examples
(i) Random errors and systematic errors
(2)
(ii) Accuracy and precision
(2)
2.2 Derive the dimensions of:
(i) Density
(2)
(ii) Momentum
(2)
2.3 Determine whether the following equation is dimensionally correct.
(i) V = U + at 2
(2)
r- smcn, 2.4 Suppose A=
where A has dimension, LT, B has dimension L2 1,
and C has dimensions LT2. Determine the dimension of n and m values. (3)
2.5The mass 'm' of the largest stone that can be moved by a flowing river
depends upon the velocity 'v' of water, density 'd' of water and acceleration
due to gravity 'g'. Use the method of dimensional analysis to deduce the
expression mass of a stone
(7)
QUESTION 3
3.1 Determine the angle between the two vectors using the dot product
approach:
A = 2 T- 2 J+3 k and B = - 4 T+ 2 J- k
(12)
(3)
3.2 Given that: = - 2T+ 2 J- 2 k,find the magnitude of~. and the unit
vector in the direction of~-
(3)
i 3.3 The position f of an object is given by [ (2.St) + (2.St - 4.9 t2) j] m
(with tin seconds). Determine;
(i) the velocity when t = 2 seconds
(3)
(iii) the magnitude of the velocity when t = 2 seconds
(3)
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QUESTION 4
(15)
4.1 A passenger plane accelerated from rest down a runway at a constant
acceleration of 2.5 m.s- 2.
(i) Determine the position and velocity of the plane 8 seconds after it
starts to move.
(3)
(ii) If the speed of 45 m/s is required for take-off, what is the minimum
length of runway required?
(2)
4.2 A spacecraft of mass 300 kg land on the moon. Calculate the moon's
gravitational acceleration, g, on the spacecraft. [Take mass of moon
Mm= 7.5 x 1022 kg, radius of the moon= 1.6 x 10 6 m, G = 6.67 x 10- 11
Nm 2 kg-2].
(3)
4.3 A rocket of mass 150 kg is launched on planet Jupiter's surface into space.
Calculate the
(i) energy required to overcome the gravitational force of Jupiter.
(3)
(ii) velocity of rocket upon launching.
(2)
4.4 A CD starts from rest and accelerates to an angular frequency of
12.5 rev/s. Determine the disc's average period T and centripetal velocity
Ve of the edge of the a disc when the radius is 3.5 x 1o-3 m.
(2)
QUESTION 5
(15)
5.1 Explain the terms adhesion and cohesion.
(2)
5.2 Suppose that a huge tank 50m high and filled with water is open to
the atmosphere and is hit with a stray bullet. The bullet pierces one side
of the tank allowing water to flow out. The hole is 2m above the ground.
If the hole is so small in comparison with the size of the tank. How quickly
will the water flow? Consider acceleration due to gravity to 9.8 m/s2
(6)
5.3 Determine the density of a sphere material, given that it has a radius of
8.2 mm with mass of 200 g.
(4)
5.4 During the time when a man had flu, he ran a fever of 7.0°C above normal.
His body temperature was 44.0°C instead of the normal 37.0°C. Assuming
that the man has a mass of 40 kg and that the human body is mostly water,
how much heat is required to raise his temperature? [Take specific heat
capacity of liquid as, c = 4186 J / kg.0 C]
(3)
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