Describe the role of the grass in the food web

Answers

Answer 1

Answer: Grass is a producer. It gets its energy from the sun, which i might add is by a process called,"photosynthesis", meaning the grass makes its own food. With this bew energy an animal such as a rabbit comes to eat it, that energy that the grass collected is now the rabbits.

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Lenses in eyeglasses change the direction of light rays to help the lens of the eye form an image inside the eye . What process take place in the eyeglass lenses ?
Sound: The more _______ a sound has, the _________ its volume is.
What is the velocity of a car that travels 100 meters north in for seconds
Explain why it is sometimes necessary for scientists to replace a scientific model?
Which answer best describes Earth's atmosphere

The initial kinetic energy imparted to a 0.020 kg bullet is 1200 J. (a) Assuming it accelerated down a 1.00 m rifle barrel, estimate the average power delivered to it during
the firing. (b) Neglecting air resistance, find the range of this projectile when it is fired
at an angle such that the range equals the maximum height attained.

Answers

Answer:

(a) Power= 207.97 kW

(b) Range= 5768.6 meter

Explanation:

Given,

Mass of bullet, $m=0.02 kg$

Kinetic energy imparted, $K=1200 J$

Length of rifle barrel, $d=1 m$

(a)

Let the speed of bullet when it leaves the barrel is $v$ .

Kinetic energy, $K=(1)/(2) mv^(2)$

$v=\sqrt{(2K)/(m) }$

$=\sqrt{(2*1200)/(0.02) }$

$=346.4m/s$

Initial speed of bullet, $u=0$

The average speed in the barrel, $v_a_v_g=(u+v)/(2)$

$=(0+346.4)/(2) \n=173.2 m/s$

Time taken by bullet to cross the barrel, $t=(d)/(v)$

$=(1)/(173.2)\n =0.00577 second$

Power, $P_a_v_g=(W)/(t)$

$=(1200)/(0.00577) \n=207.97kW$

(b)

In projectile motion,

Maximum height, $H_m=(v^2\sin^2\theta)/(2g) \n$

Range, $R=(v^2\sin2\theta)/(g)$

given that, $H_m=R$

then, $(v^2\sin^2\theta)/(2g)=(v^2\sin2\theta)/(g)\n\sin^2\theta=2\sin\theta\cos\theta\n\n\tan\theta=4\n\theta=\tan^-^14\n\theta=75.96^0\nR=(v^2\sin2\theta)/(g)\n=(346.4^2*\sin(2*75.96))/(9.8)\n5768.6 meter$

A class of students is modeling how waves propagate through a medium. Each student in the class represents particle in the medium. An envelope represents the energy transferred by the wave. Which of the following scenarios would accurately model a wave propagating from one side of the room to the other?

Answers

C: "The students pass the envelope from one student to the next until it travels across the room."

To quote ck12, "The particles of the medium just vibrate in place. As they vibrate, they pass the energy of the disturbance to the particles next to them, which pass the energy to the particles next to them, and so on."

What is a bond called that shares electrons between two neutral atoms? A.covalent bond B.ionic bond C.metallic bond D.polar bond

Answers

The type of the chemical bond that forms when electrons are shared between atoms that are neutral, have no electrical charge is A. Covalent bond.

Pretty sure it's B. I took Natural sci softmore year and got A in the class

Describe the energy transformations that occur when you bounce a ball?

Answers

The potential energy of the ball changes into kinetic energy.

the transformation is kinetic energy

What is the voltage in a circuit if the current is 6.2 A and the resistance is 18 ohms

Answers

We already know the formula:
Voltage = Current * Resistance
In the given question, there are numerous information's that are already given.
Current = 6.2 A
Resistance = 18 ohms
Then
Voltage = 6.2 * 18 Volts
= 111.6 Volt
So, the voltage in the circuit will be 111.6 volts. I hope it helps you.

If you are doing a USA TEST Prep:

D) 111.6 V

Newton discovered that gravity behaves differently in space than it does on Earth. true or false?

Answers

Yes. It is true. Gravity behaves differently than on earth. In-fact, as we go above the earth surface the gravity decreases. Gravity as we go above the earth surface can be calculated using following formula:

g' = g(1-2h/R)

Hence, it is true that the gravity behaves differently than on earth.

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Fireworks change _____ into _____ and _____ energy.

3. A block of mass m1=1.5 kg on an inclined plane of an angle of 12° is connected by a cord over a mass-less, frictionless pulley to a second block of a mass m2= 1.2 kg hanging vertically. If the hanging block falls 0.92min 1.23 s, what is the coefficient of friction between m1 and the inclined plane?Please show work

Bismuth and fluorine react to form bismuth fluoride. If 41796 g ofbismuth reacts completely with 113.99 g of fluorine, how many grams ofbismuth fluoride are formed?

The intensity or brightness of light depends on