Answer:
Explanation:
1.Technology is an application of science through use of modern scientific tools.
2.They provide a concrete view of something abstract. They are also applicable to gain an understanding of better process and systems.
3.C.55.25s
4. A. straight line graph.
5. A. Milk. A pure substance consist of a single element or compound.
6.B. it has two hydrogen atom to one oxygen atom
7.B. Sugar water.
8.D.Size of their particles.
9.A.sawing a piece of wood into half.
10.A..iron changes colour when heated.
11.A.solid
12.A. Lowering the temperature, which lead to increase in gas volume according to. Boyle's law.
13.C. boiling point of naphthalene.
14.freezing,which is the mostly orderly point of water because water moves from liquid to solid state.
15.A.sublimation.
16.B.Vaporisation.
17.C.it is described by a nucleus surrounded by a large volume is space.
18. The atom in the excited state has more energy and is less stable than atom in the ground state.
19.The discovery of elements with predicted properties.
20.The sum total of mass of an element.
Answer:
a) v = 7.69 10³ m / s, b) T = 92.6 min
Explanation:
a) For this exercise we use the centripetal acceleration ratio, which in itself assumes a circular orbit, is equal to the acceleration of gravity
a = v² / r
v = 
the distance to the ISS is
r = R_earth + d
r = 6400 10³ + 400 10³
r = 6800 10³ m
we calculate
v = 
Ra (8.69 6800 103)
v = 
v = 7.687 10³ m / s
the result with the correct significant figures
v = 7.69 10³ m / s
b) The speed of the ISS is constant, so we can use the uniform motion relationships
v = d / t
if distance is the orbit distance
d = 2π r
time is called period
v = 2π r / T
T = 2π r / v
let's calculate
T = 2π 6800 10³ /7,687 10³
T = 5.558 10³ s
let's reduce the period to minutes
T = 5.558 10³ s (1 min / 60s)
T = 9.26 10¹ min
T = 92.6 min
Newton’s 2nd law states that Force is equal to
the product of mass (m) and acceleration (a):
F = m a --->
1
While in magnetic forces, force can also be expressed as:
F = q v B --->
2
where,
q = total charge
v = velocity = 45 cm / s = 0.45 m / s
B = the magnetic field = 85 T
First we solve for the total charge, q:
q = 3.8 × 10^-23 g (1 mol / 23 g) (6.022 × 10^23 electrons / mol) (1.602 ×
10^-19 C / electron)
q = 1.594 × 10^-19 C
We equate equations 1 and 2 then solve for acceleration a:
m a = q v B
a = q v B / m
a = [1.594 × 10^-19 C * 0.45 m / s * 85 T] / 3.8 × 10-26 kg
a = 160,437,862.2 m/s^2
Therefore the maximum acceleration of Na ions is about 160 × 10^6 m/s^2.
Answer:
50m/s²
Explanation:
cross muliplyy write down the values acceleration and force
