Answer:
cell wall
Explanation:
A cell wall is a rigid layer that surrounds a plant cell, providing structural support. Other functions of cell walls in plant cells are protection and the transport, absorption, and storage of nutrients and wastes. Cell walls are most commonly found in plants, but they can also be found in other organisms, such as bacteria.
The 2nd Law says F=ma, where F is the force in Newtons, m is mass and a is acceleration. Earth's gravity is an acceleration, 9.8m/s^2. So you can solve the equation for mass, m=F/a, or m=F/9.8 where you've measured the force (weight) in Newtons.
Answer:
The driver hits the stationery dog because the applied force is less than required force
Explanation:
Kinetic energy will be given by
where m is the mass of the vehicle and v is the speed/velocity of the vehicle.
Substituting 800 Kg for m and 20 m/s for v we obtain
![KE=0.5*800*(20 m/s)^{2}=160,000](https://tex.z-dn.net/?f=KE%3D0.5%2A800%2A%2820%20m%2Fs%29%5E%7B2%7D%3D160%2C000)
Frictional force by vehicle pads is given by
where d is the distance moved
Substituting 160000 for KE and 50 m for d we obtain
![Fr=\frac {160000}{50}=3200 N](https://tex.z-dn.net/?f=Fr%3D%5Cfrac%20%7B160000%7D%7B50%7D%3D3200%20N)
Therefore, the vehicle hits the dog since the required force is 3200N but the driver applied only 2000 N
Explanation:
sun was created through the hypothesis
Answer:
Option 5.
Explanation:
Many of the properties of water like high specific heat, cohesion, high vaporization heat, etc can be contributed to the polar nature of water molecule.
Water being a polar molecule as it contains positively charged hydrogen and an electro-negative oxygen which results in uneven or non uniformity in sharing of electrons which leads to dipole formation and hence polarization of the molecule due to which it attracts its neighboring molecules.
This polar nature imparts the properties like cohesion, surface tension , adhesion, etc due to the presence of hydrogen bonds in water molecule.