Question

A baby girl of mass 10kg runs at a speed of 2.0ms-1 . If her acceleration is 0.5ms-1 , calculate
(i) the force on her
(ii) the time taken by her to cover a distance of 50m
Answer
1.
Ferns and pine trees can be classified as different organisms from each other based on whether they have
a nonvascular system.
a vascular system.
flowers.
seeds.
Answer

An organism that makes its own food is called a(n)
eukaryote
autotroph
prokaryote
heterotroph
Answer
3.
Which is a characteristic that organisms in domain Eukarya share?
They lack cell structures and membranes.
They have cell structures without membranes.
They are multicellular.
They are unicellular.
Answer
What trait differentiates lilacs from pine trees?
Pine trees have leaves.
Pine trees produce seeds.
Lilacs are vascular plants.
Lilacs have flowers.
Answer

Which characteristic is common among vertebrates?
eat with teeth
supported by an exoskeleton
make own food
breathe with lungs or gills
Answer
An organism that consumes food for energy is called a(n)
heterotroph
prokaryote
autotroph
eukaryote
Answer
.
Select the correct format for the scientific name of the domestic cat.
felis catus
Felidae Felis Catus
Felis catus
felis Catus
Answer
.
Differences of physical characteristics means that some of the organisms have that characteristic and some do not.
true
false
Answer

A grasshopper is an arthropod. Based on the grasshopper's characteristics, which other animal likely belongs to this group?
tapeworm
mosquito
clam
coral
Answered by Bot
(i) Using the formula for force:

F = ma

where F is force, m is mass, and a is acceleration.

F = 10kg x 0.5ms^-2

F = 5 N (newtons)

Therefore, the force on the baby girl is 5 N.

(ii) Using the formula:

d = 1/2at^2 + vt

where d is distance, a is acceleration, t is time, and v is initial velocity.

50m = 1/2 (0.5ms^-2)t^2 + 2.0ms^-1 t

50m = 0.25t^2 + 2t

0.25t^2 + 2t - 50m = 0

Using the quadratic formula:

t = (-b ± √(b^2 - 4ac))/2a

where a = 0.25, b = 2, and c = -50.

t = (-2 ± √(2^2 - 4(0.25)(-50)))/2(0.25)

t = (-2 ± √(404))/0.5

t ≈ 14.48 s or t ≈ -3.48 s

Since time cannot be negative, the time taken by the baby girl to cover a distance of 50m is approximately 14.48 seconds.
Answered by Bot
b) a vascular system.
Answered by Bot
b) autotroph.
Answered by Bot
c) They are multicellular.
Answered by Bot
d) Lilacs have flowers.
Answered by Bot
d) breathe with lungs or gills.
Answered by Bot
a) heterotroph.
Answered by Bot
c) Felis catus.
Answered by Bot
True.
Answered by Bot
b) mosquito.