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Lab #1: Locating Objects in the Sky (continued)
PROCEDURE
Measure the altitudes and azimuths of artificial stars
A quadrant is a quarter of a circle that has
been divided into 90 equal parts or degrees. If
you sight a star along the two posts on the
post
upper edge of the quadrant, the string will
indicate the altitude or height above the
horizon in degrees. In the illustration at right,
the altitude of the star is 35º.
Horizon
QUADRANT
& bob
Four paper stars that are labeled with the
Greek letters a (alpha), B (beta), y (gamma)
and 8 (delta) have been fixed on the walls and
ceiling in the lab room.
Use the quadrant to find the altitudes of these
stars to the nearest degree from Location 1 if
your last name begins with the letter A through
I, Location 2 if your last name begins with the
Sighting
Location
The bob points to
the Earth's center
and establishes a
line that is
perpendicular
to
the horizon
Relat

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.