Answer:
7840 N
Explanation:
F = Nμ
F = mgμ
F = (2000 kg) (9.8 m/s²) (0.4)
F = 7840 N
Answer:
A fungus which grows in association with the roots of a plant in a symbiotic or mildly pathogenic relationship
Answer:
The difference is height is 
Explanation:
From the question we are told that
The distance of ball from the goal is 
The height of the crossbar is 
The speed of the ball is 
The angle at which the ball was kicked is 
The height attained by the ball is mathematically represented as
Where
is the vertical component of velocity which is mathematically represented as

substituting values

Now the time taken is evaluated as

substituting value


So


The difference in height is mathematically evaluated as

substituting value


<h2>
Answer: D. Salinity level and temperature</h2>
Explanation:
The density
of the water is given by a relation between its mass
and its volume
:

Isolating the volume:

This means the <u>volume of the water will depend on its mass and its density</u>.
In this sense, the two factors that affect the volume of seawater are <u>salinity level and temperature.
</u>
This is because the salinity (<u>amount of salt in water</u>) changes the its mass and its density, therefore its volume. The higher the salinity, the greater the volume.
In the case of temperature, when it increases, the volume of water also increases and when the temperature decreases, the volume also decreases.