Answer:
Magnitude of displacement = 2.07 km
Magnitude of average velocity = 1.17 kmph
Explanation:
Let east represent positive x axis and north represent positive y axis.
A bird watcher meanders through the woods, walking 1.93 km due east, 1.03 km due south, and 3.84 km in a direction 52.8 ° north of west.
1.93 km due wast
s ₁ = 1.93 i km
1.03 km due south
s₂ = -1.03 j km
3.84 km in a direction 52.8 ° north of west
s₃ = -3.84 cos 52.8 i + 3.84 sin 52.8 j = -2.32 i + 3.06 j km
Total displacement
s = s ₁+ s₂+ s₃ = 1.93 i - 1.03 j -2.32 i + 3.06 j = -0.39 i + 2.03 j
Magnitude of displacement,
Time taken = 1.771 hour
Magnitude of average velocity,
Answer:
your friend will wait for you for 2.2 minutes.
Explanation:
Given;
Distance of the journey, d = 50 km
your speed, v₁ = 88.5 km/h
your friends speed, v₂ = 94.5 km/h
The time taken before you reached the end of the trip;
The time taken before your friend reached the end of the trip;
The difference in time = (0.565 - 0.529) hour
= 0.036 hour
= 0.036 x 60 min
= 2.2 mins
Therefore, your friend will wait for you for 2.2 minutes.
Answer:
false
Explanation:
since it has seven valence electrons it means it's a non metal and non metals always gain electrons.
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:
v = 6.315 cm
Explanation:
given,
R₁ = 4 cm = 0.04 m
R₂ = 15 cm = 0.15 m
n =1.5
v = 0.06315 m
v = 6.315 cm
hence, the distance of the image from the back surface is v = 6.315 cm