Ask question

Ask question

All categories

4 years ago

14

Think of an animal and list two resources that it might compete for in its community . Then describe what adaptions the animals

has to compete for these resources

1 answer:

Viefleur [7K]4 years ago

6 0

An animal is a lion, it may compete for food and it’s territory. The animal may have to fight other animals to get these things

You might be interested in

The FIRST step in cloud formation is.... A) warmed air cools and condenses. B) solar energy causes warm air to rise. C) solar en

Elodia [21]

c because the fist step is condensing then rising up

3 0

3 years ago

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away.

sukhopar [10]

Answer:

A) As the source approaches you, the waves are compressed so that the pitch of the noise increases.

Explanation:

The Doppler Effect occurs when there is relative motion between an observer and the source of a wave. When this happens, there is an apparent shift in the frequency of the wave, as perceived by the observer. In particular, two situations can occur:

1- If the source of the wave is moving towards the observer, the waves are compressed, so that the wavelength of the wave decreases, and therefore the frequency (and so the pitch) increases

2- If the source of the wave is moving away from the observer, the waves are stretched, so that the wavelength of the wave increases, and therefore the frequency (and so the pitch) decreases

An example of Doppler Effect occurs when we hear the sound of the siren of an ambulance.

In this problem, the situation described is situation 1 (sound waves is approaching the observer), so according to the explanation above, the correct answer is

A) As the source approaches you, the waves are compressed so that the pitch of the noise increases.

3 0

4 years ago

Read 2 more answers

A meter stick balances horizontally on a knife-edge at the 51 cm mark. With two nickels stacked over the 6.0 cm mark, the stick

Oliga [24]

Answer:

65g

Explanation:

Two main conditions for equilibrium are:

I. The resultant force must be equal to zero. That is, sum of the forces acting in one direction about a point must be equal to the sum of the forces acting in the opposite direction about the same point.

II. The resultant moment must be equal to zero. That is, sum of the moments in one direction about a point must be equal to the sum of the moments in another direction about the same point.

For the above question,

the 51cm mark is the point where the resultant weight of the meter stick lies,

the pivot or point is the 45cm mark where the stick balanced when 2 nickels ( total mass (5.0g x 2) 10g were placed at the 6cm mark.

Using the conversion factor:

1000g(1kg) = 10N, we can convert mass to weight, calculate the weight of the meter stick then reconvert to mass.

That is,

mass of 2 nickels = 10g = 10/1000 = 0.01N.

Moment = Force x distance from line of force to pivot of rotation

Applying the principle of equilibrium,

Moment of left side = Moment of right side

0.01 x (45-6) = W x (51-45)

Where W = weight of the meter stick

W x 6 = 0.01 x 39

W x 6 = 0.39

W = 0.39/6

W= 0.065N

Therefore, mass of meter stick = 0.065 x 1000 = 65g.

4 0

3 years ago

What is the most important safety rule in cycling?

Mekhanik [1.2K]

Answer:

Wear a helmet. Stay visible; use bike lights and/or wear bright clothes. Look and Signal; use hand signals to let drivers know where you're going, try to make eye contact with them and look before you go.

Explanation:

4 0

3 years ago

Read 2 more answers

You have a spool of copper wire 4.82 mm in diameter and a power supply. You decide to wrap the wire tightly around a soda can th

GalinKa [24]

To solve the problem it is necessary to have the concepts of the magnetic field in a toroid.

A magnetic field is a vector field that describes the magnetic influence of electric charges in relative motion and magnetized materials.

By definition the magnetic field is given by the equation,

$B=\frac{\mu_0 NI}{2\pi r}$

Where,

$\mu_0$ = Permeability constant

N = Number of loops

I = Current

r = Radius

According to the given data we have that the length is 120mm and the thickness of the copper wire is 4.82mm.

In this way the number of turns N would be

$N=\frac{120mm}{4.82mm}$

$N = 24.89 \approx 25 turns$

On the other hand to find the internal radius, we know that:

$2\pi r_i = 12cm$

$r_i= \frac{12}{2\pi}$

$r_i= 1.91cm$

Therefore the total diameter of the soda would be

$r= r_i+r_o = 1.91+6.5=8.51cm$

Applying the concept related to magnetic field you have to for the internal part:

$B_i=\frac{\mu_0 NI}{2\pi r_i}$

$B_i=\frac{(4\pi*10^{-7}) (25)(230)}{2\pi (1.91*10^{-2})}$

$B_i = 0.060T$

The smallest magnetic field would be on the outside given by,

$B_o=\frac{\mu_0 NI}{2\pi r}$

$B_o=\frac{(4\pi*10^{-7}) (25)(230)}{2\pi 8.51}$

$B_o = 0.0136T$

<em>Therefore the maximum magnetic field is 0.06T.</em>

4 0

4 years ago