Answer:
6logs
Explanation:f
First finding the volume of the logs
V= π/4d²l
= 0.098m³
So number of logs will be
Weight of 2 boys + weight of log = buoyancy force.
So
2( 400)+ N ( Mlog x g) = density of water x volume displaced x g
2(400) = N x 0.098x 1000x 9.8 x 0.9- 0.75* 1000
N= 5.5 which is approx 6logs
Answer:
C. 69.0 kJ
Explanation:
Step 1: Given data
Mass of the horse (m): 500 kg
Distance traveled by the horse (d): 2000 m
Time elapsed (t): 120 s
Step 2: Calculate the speed of the horse (v)
The speed of the horse is equal to the distance traveled divided by the time elapsed.
v = d/t
v = 2000 m/120 s
v = 16.6 m/s
Step 3: Calculate the kinetic energy (K) of the horse
We will use the following expression.
K = 1/2 × m × v²
K = 1/2 × 500 kg × (16.6 m/s)²
K = 6.90 × 10⁴ J
Step 4: Convert "K" to kJ
We will use the conversion factor 1 kJ = 1000 J.
6.90 × 10⁴ J × (1 kJ/1000 J) = 69.0 kJ
By copying their genomes, they retain the tool kit and at the same time generate a garage full of spare parts. Gene duplication can provide the raw material for expression changes to occur, and polyploidy itself can trigger epigenetic changes
Answer:
Negative 3
Explanation:
Bc scientific notation is the zeros either ahead or behind the actual numbers