Answer:
B
Explanation:
PT HW 3.1
(linear) Kinetic Energy and Wor
1.a. A bicycler has a mass of 80. kg. He pedals the bike 100 min 20 seconds. What is
his kinetic energy (KE;)?
Given, Unknown:
Equation, Substitute:
Solution:
1.b. The bicycler (still 80.kg of mass) doubled his speed to 200m in 20 seconds, What
his new kinetic energy (KE)? What is the ratio of KE; and KE?
Given, Unknown:
Solution
Equation, Substitute:
1.c. The bicycler doubled his speed. What happened to his KE?
2.a. Car A has a mass of 250. kg. It's engine accelerates it from 0.0 to 20. m/s in 6.0
ndo (a) what is the car's acceleration in m s?
tio hstitute:
Solution:
Answer:
1.a) 1 kJ
1.b) 4 kJ
ratio 1:4
1.c) 4 times as before
2.a) 3.33 m/s2
Explanation:
1.a) bicycle's velocity =Displacement/time
=100/20 m/s
=5 m/s
bicycler's KE =1/2 *mass*(velocity)^2
=1/2*80*5^2
=1000 J = 1 kJ
1.b) bicycle's new velocity =200/20 m/s
=10 m/s
bicycler's new KE =1/2*80*10^2
=4000 J = 4 kJ
Ratio= KE 1 :KE new
= 1 :4
1.c) when bicycler's speed was doubled it increased the KE by 4 times (2^2). because In KE we consider the square of the speed , so the factor we increase the speed , the KE will get increased with the square value of it
ex : speed is triple the prior value , then the KE is as 3^2 times as before. that is 9 times
2.a) car acceleration = (20-0)/6 m/s2
= 3.33 m/s2
Answer:
an insulator
Explanation:
Examples: Plastic, rubber, etc.
A conductor would be the opposite of an insulator like metal.
Answerfamily
Explanation:
Here a cat is running at constant speed which is given as 10 km/h for 5s
So here the average speed is defined as total distance moved in total time interval
so here it is given by
since
here speed of cat is constant so it will remain the same
And hence the average speed and instantaneous speed at any instant for this duration will remain the same
so here answer would be
average speed = 10 km/h
instantaneous speed = 10 km/h
The bacteria being a prokaryote have free-floating DNA in their cytoplasm as their control center.
DNA has been defined as the genetic material present in major organisms including prokaryotes and eukaryotes. It consists of hereditary information that is passed on from one generation to another.
The bacteria being a prokaryote has their genetic material (DNA) in a free-floating state in the cytoplasm rather than being constrained in a nuclear envelope, unlike the eukaryotes.
DNA acts as the control center for the bacteria as it codes for genetic information, metabolism, and development and regulates all cellular activities as well.
Therefore, DNA is the control center of the bacterial cells.
Learn more about prokaryotic DNA, here:
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