M1 - GEN PHYSICS

C. 2x10⁶ bytes

Data allocation in cellphone load depends on the amount that you pay. If you are using a prepaid sim and you purchased Cellphone load of 99 pesos with data allocation of 2 Mb, how is this data expressed in scientific notation? a. 2x10² bytes b. 2x10³ bytes c. 2x10⁶ bytes d. 2x10⁹ bytes

D. 9.834x10-³

How is the number 0.009834 expressed in scientific notation? a. 9.834x10⁴ b. 9.834x10-⁴ c. 9.834x10³ d. 9.834x10-³

A. 0.0254

How many meters are there in an inch? a. 0.0254 b. 0.254 c. 2.54 d. 24.5

D. 7

How many significant figures are there in 6712.460 a. 3 b. 4 c. 6 d. 7

A. 0.00001 s

Given the speed of light as 3x10⁸ m/s, how much time would it take for light to travel 10,000 ft? 1 inch = 2.54 cm a. 0.00001 s b. 0.00010 s c. 0.00100 s d. 0.01000 s

small value of standard deviation

means that the measurements are close to their average

vectors

can be added graphically and analytically

graphical method

can be done thru parallelogram method or polygon method

analytical method

can be done using law of sines and cosines, and component method

parallelogram method

can be used to add three or more vectors

physical quantities

can either be scalar or vector

component method

component method is used when more than two vectors are to be added

time and temperature

examples of scalar quantities

velocity force displacement acceleration

examples of vector quantities

C. the direction angle of B is equal to the direction angle of A plus 180°

if A and bare vectors and B = -A, which of the following is true? a. the magnitude of B is equal to the negative of the magnitude of A b. A and B are perpendicular c. the direction angle of B is equal to the direction angle of A plus 180° d. A + B = 2A

A. 15 m/s

if a ball is thrown with a velocity of 25 m/s at an angle of 37° above the horizontal, what is the vertical component of it's velocity? a. 15 m/s b. 18 m/s c. 20 m/s d. 25 m/s

Physics

is a field of science that deals with the interaction of matter, force and energy

standard deviation

is a measure of how diverse or spread out a set of measurements is from their mean or average

percent difference

is a measure of how far apart the different measured values are from each other, and is therefore an indication of precision

accuracy

is how close a measurement is to the correct value for that measurement

percent error

is usually considered in judging the accuracy of a measurement

scientific notation

it is a product of a number (mantissa) greater than or equal to 1 and less than 10 and a power (or exponent) of 10

quantity: mass unit: kilogram symbol: Kg

it is the actual mass of platinum-iridium cylinder kept at the international bureau of weights and measures in Sévres, France

quantity: temperature unit: kelvin symbol: K

it means fraction if 1/273.16 of the triple point of water

quantity: amount of substance unit: mole symbol: mol

it refers to amount of substance that contains as many atoms or molecules as there are atoms in 0.012 kg of carbon-12

quantity: luminous intensity unit: candela symbol: Cd

one candela is the luminous intensity in a given direction of a source that emits a monochromatic radiation of frequency 540x10¹² Hz and that has a radiant intensity in that direction of 1/683 watts per steridian

D. The units are not comparable

Which of the following SI units of measurements is the largest? a. milligram b. kilometer c. microsecond d. the units are not comparable

A. 5.4

a density of 5400 kg/m³ is equal to _________ g/cm³ a. 5.4 b. 54 c. 540 d. 5400

B. 5.0 m

a student adds two displacements with magnitudes of 3.0 m and 4.0 m, respectively. the angle of separation between the vectors is 45°, what is the resultant vector? a. 1.3 m b. 5.0 m c. 6.8 m d. 7.8 m

C. 7.99 m

a student walks 10 m, 37° of east. what is the horizontal component of the displacement of this motion? a. 3.99 m b. 5.0 m c. 7.99 m d. 10.0 m

error

an ______ results because of the deviation of measured data from being precise

laws of sines and cosines

are being used if the triangle formed by adding two vectors is not a right triangle

physical quantities

are expressed in terms of units of measurements which are defined by standards

vector quantities

are quantities that can be described by both magnitude and direction

random errors

are results unpredictable or inevitable changes during data measurement

scalar quantities

are those that can be described with magnitude only

D. 107.09 inches

robert wadlow is considered the tallest man ever, according to guiness book od world records, with an unprecedented height of 272 cm. how tall is he in inches? a. 136 inches b. 123.6 inches c. 108.8 inches d. 107.09 inches

large standard deviation

signifies that measurements are diverse

precision

states how well repeated measurements of something generate the same or similar results

A. force

the following are physical fundamental quantities except a. force b. length c. luminous intensity d. mass

C. speed

the following are vector quantities except a. acceleration b. velocity c. speed d. displacement

meter kilogram second kelvin ampere candela mole

the fundamental units, or base units for the fundamental physical quantities

A. 0°

the magnitude of the resultant vector of two vectors is greatest when the angle between them is.... a. 0° b. 45° c. 90° d. 180°

B. zero

the resultant of two vectors depends on the angle between them. Maximum magnitude of the resultant is obtained if the angle between them is a. at minimum (not zero) b. zero c. 90° d. 180°

resultant vector

the sum of two or more vectors is called......

C. 0.75 hour

the world's fastest train is a maglev bullet train that can reach a speed of 600 km per hour. mainland palawan is approximately 450 km long. hypothetically, if you are to travel the mainland palawan via the said fastest bullet train, how long would it take you to reach the end point of you came from the other end point? a. 0.25 hour b. 0.50 hour c. 0.75 hour d. 1.00 hour

international standard or systéme International (SI)

these standards are listed in the metric system, officially termed as......

quantity: length unit: meter symbol: M

this is distance travelled by light in a vacuum in 1/299,792,458 second

quantity: electric current unit: ampere symbol: A

this is the constant current flowing in each of two long parallel wires, 1.0m apart, that produce between these wires a force equal to 2x10-⁷ newton per meter length of each wire

polygon method

this method is also called head-to-tail method. this is more convenient to use if you are adding three or more vectors

quantity: time unit: second symbol: S

this refers to the duration for 9,192,631,770 cycles of the microwave radiation corresponding to the transition between two lowest states of cesium atom

variance

this statistical measurement is another way to estimate errors from multiple measurements of a physical quantity

B. random error

uncontrolled changes in air pressure while determining the boiling point of a liquid give arise to? a. personal error b. random error c. relative error d. systematic error

systematic errors

usually come from the measuring instrument or in the design of the experiment itself

B. 3.0000 represents quantity that is known more precisely than 3.0

what is the difference between 3.0 and 3.0000 a. 3.0000 could be the result of an intermediate stop in a calculation; 3.0 has to result from a final step. b. 3.0000 represents quantity that is known more precisely than 3.0 c. there is no difference d. they convey the same information, but 3.0 is preferred for ease of writing

percentage error or simply percent error

when there is an expected or true value of a quantity, __________ is usually calculated

D. voltage

which is a derived quantity a. electric current b. temperature c. time d. voltage

variance

which is derived from the word vary, measures the squared deviation of each number in the set from the mean

standard deviation

which is the square root of variance

D. polygon method

which method of adding vectors is otherwise known as the head-to-tail method? a. component method b. graphical method c. parallelogram method d. polygon method

A. force

which of the following is a derived quantity? a. force b. mass c. temperature d. time

A. component method

which of the following methods is more convenient to use in adding more than two vectors? a. component method b. cosine law c. sine law d. parallelogram method

A. precise measurements are always accurate

which statement is not true? a. precise measurements are always accurate b. accurate measurements are always precise c. precise measurements can be inaccurate d. inaccurate measurements can be precise

D. scalar quantities can be added to other scalar quantities using ordinary addition

which statement is true concerning scalar quantities? a. scalar quantities have both magnitude and direction b. scalar quantities can be added to vector quantities using rules of trigonometry c. scalar quantities can be added to other scalar quantities using rules of trigonometry d. scalar quantities can be added to other scalar quantities using ordinary addition