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3 years ago

How are cactus adapted to survive in deserts?

Physics

1 answer:

andreev551 [17]3 years ago

7 0

1. They have evolved their leaves into spikes for minimum water loss through transpiration.

2. They have a waxy layer for minimum water loss.

3. They have thick walls for minimum water loss.

4. They can take water from atmosphere.

5. They change the photo energy from Sun into an intermediate stage and store it, so that they can make food even in night.

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What is the acceleration of a truck with a mass of 2,000 kg when its brakes apply a force of 10,000 N?

sattari [20]

Answer:

5m/s2

Explanation:

Data obtained from the question include:

m (mass) = 2000 kg

F (force) = 10000N

a (acceleration) =?

Using the formula F = ma, the acceleration of the truck can be obtained as follow:

F = ma

a = F/m

a = 10000/2000

a = 5m/s2

The acceleration of the truck is 5m/s2

8 0

4 years ago

A fluid in an aquifer is 23.6 m above a reference datum, the fluid pressure (in gage pressure) is 4390 n/m2 and the flow velocit

Phoenix [80]

As per Bernuolli's Theorem total energy per unit mass is given as

$\frac{P}{\rho} + \frac{1}{2}v^2 + gH = E$

now from above equation

$P = 4390 N/m^2$

$\rho = 0.999 * 10^3$

$v = 7.22 * 10^{-4} m/s$

$H = 23.6 m$

now by above equation

$\frac{4390}{0.999*10^3} + \frac{1}{2}*(7.22*10^{-4})^2 + 9.8*23.6 = E$

$E = 235.7 J/kg$

Part B)

Now energy per unit weight

$U = \frac{E}{g}$

$U = \frac{235.7}{9.8}$

$U = 24 m$

7 0

4 years ago

Which of the following reactions release more energy? nuclear chain reactions fusion reactions fission reactions chemical reacti

I am Lyosha [343]

Answer:

nuclear chain reactions

Explanation:

yes

6 0

4 years ago

A student pushes horizontally on a book with a force of 2 N, which causes the book to slide at a constant velocity. What is the

irinina [24]

2N- if it is sliding at a constant velocity, the net force (total force)=0 so the applied force and friction force are equal to make 0

5 0

3 years ago

Two identical objects (such as billiard balls) have a one-dimensional collision in which one is initially motionless. After the

elena55 [62]

Answer:

m₁ v = m₂ v

Explanation:

Let's define a system formed by the two objects, for this system the forces during the crash are internal, action and reaction, so that the memento is conserved,

Let's write the initial moment, before shock

p₀ = m₁ v + 0

Final after crash

$p_{f}$ = 0+ m₂ v

How the moment is preserved

p₀ = $p_{f}$

m₁ v = m₂ v

It tells us that peer speed

m₁ = m₂

Since the two masses are the same, it shows that the moment is preserved in this collision.

The kinetic energy is

Initial

K₀ = ½ m₁ v² + 0

Final

$K_{f}$ = 0 + ½ m₂ v²

K₀ = $K_{f}$

½ m₁ v² = ½ m₂ v²

m₁ = m₂

which is true because it indicates that the objects are the same.

5 0

3 years ago