A scientist views an unknown cell under a microscope. Which of the following observations would support the claim that it is a plant cell rather than an animal cell? Choose 1 answer: (Choice A) A It has a cell membrane. (Choice B) B It has chloroplasts. (Choice C) C It is round in shape. (Choice D) D It has a nucleus.

The efficiency of this light bulb is 25% .

Given data :

output = 30j

Input = 120j

Efficiency  = output / input x 100

  = 30 / 120 x 100

  = 25%

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Answer:

Explanation:

operantly conditioned; positively reinforced

The property of water that allows it to act as a transport medium is its high polarity and ability to form hydrogen bonds.

The property of water that allows it to act as a transport medium is its high polarity and ability to form hydrogen bonds.

Water is a polar molecule, meaning it has a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom. This polarity allows water molecules to attract and interact with other polar and charged substances, making it an excellent solvent.

It can dissolve many ionic compounds, as well as polar molecules like sugars and amino acids. This ability to dissolve and transport substances enables water to facilitate various biological processes, such as nutrient absorption in plants and animals and the movement of molecules within cells.

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Answer:

H = 6 atoms

K= 2 atoms

O = 2 atoms

Answer:

H is 6 atoms K is2 atoms and O is 2 atoms

Explanation:

Answer:

Spaghetti.

Explanation:

The mechanical energy lost by the car is 246415.84 J.

This can be defined as the energy possessed by a body due to motion or due to its position.

To calculate the mechanical energy lost, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The mechanical energy lost by the car is 246415.84 J.

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Answer:

298.8g

Hope this helps! :)

Answer:

radiation heat.

Explanation:

That is any heat that passes through the air, like the sun.

Answer:

radiation

Explanation: I’m sure

pls mark as brainliest if possible

Answer:

Yes

Explanation:

A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.

Answer:

Below

Explanation:

135 lbs  *  1 kg/2.2 lb  = ~ 61.4 kg

there are 1000 mg in each gram

5.3 mg   *  1 gm / 1000 mg = .0053 g

Johnny needs not to be worried because blood contains buffering agents which resist changes in pH.

Blood is defined as the fluid of the circulatory system that is made of various cells and plasma the travels through the body in veins and arteries. The cells found in the blood include the following:

At the normal healthy state of an individual, the pH of the blood is kept constant at 7.35 to 7.45. This is because, the buffering agents found in the blood such as carbonic acid and bicarbonate anion helps in the maintenance of the blood pH.

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Answer:

Gravity

Explanation:

The discovery of hot Jupiters in our Solar System came as a surprise because these planets are characterized by their close proximity to their host stars, which contradicts the traditional understanding of planetary formation and migration.

Hot Jupiters are gas giant exoplanets that orbit very close to their host stars, typically within a distance of 0.1 astronomical units (AU). This discovery was surprising because it challenged the existing theories of planetary formation and migration. According to the widely accepted core accretion theory, gas giants like Jupiter form in the cold outer regions of protoplanetary disks, where there is an abundance of gas and solid particles. It was believed that once formed, these massive planets would remain in their distant orbits far from their host stars.

However, the presence of hot Jupiters contradicts this understanding. These planets are thought to have migrated from their original formation locations to their current close orbits. Several mechanisms have been proposed to explain this migration, including gravitational interactions with other massive bodies, planet-planet scattering, or gravitational tidal forces from the host star. The exact process of hot Jupiter formation and migration is still an active area of research, and scientists continue to study these intriguing exoplanets to gain a deeper understanding of their origins and characteristics.

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Answer:

c

Explanation:

Answer:

it's d

Explanation:

because if you had energy you could do anything but without energy you won't be able to so anything

hope this helps

Answer:

Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

Part A) 21 The current falls whenever two transistors are linked in series because the overall resistance rises. However, if you link them in parallel, total resistance is reduced, which causes current to increase. Therefore, choice 1 is correct. In a series circuit, the current is continuous.

Part B) The right answer is that when two resistors are linked in series, less total current flows through the circuit than when they are connected in parallel.

What a resistor is. a passive electrical device that has two terminals and is employed in electrical circuits to limit or regulate the flow of current. A resistor's primary function is to lower the voltage and reduce current flow in a specific area of the circuit.

The amount of current flowing through the circuit is affected by any changes in a resistance value. The following are some circuit functions where resistors are used: the musical tone's pitch, and.

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Answer:

A

Explanation:

Answer:

p>Whether an object will float or sink is dependent on its density, and on the density of the liquid it is placed in. In the case of water, an object with a density less than 1 g/cm3 will float. The closer its density is to 1 g/cm3, the more of it will sit below the water level.

A cart speed will often increase on a downhill slope while decreasing on an uphill section. A steeper gradient portion has a more pronounced impact on the acceleration or slowdown of a vehicle's speed.

The cart speed/velocity will progressively rise by the same amount each second. The rate of acceleration of the car increases with the slope's steepness (or the ramp's greater angle of inclination). This is so because the slope's angle determines how much gravity is felt.

Therefore, the more gravitational potential energy that can be turned into kinetic energy, the higher the ramp will be, and the more kinetic energy there is, the faster the car will move.

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Answer:

i need the describtion like what i need to do

Explanation:

Answer:

it's easy bro once try yourself if you can't then l am here

Explanation:

An ultrasound is a sound with frequency greater than 20MHz

So, the chronological order for the following set of solar system is:

Hydrogen in core depleted

Helium fusion begins in core

Helium fusion in shell around carbon core

Final stages of mass loss via stellar winds

White dwarf surrounded by planetary nebula

Planetary nebula dissipates away

Yes, the correct chronological order of these events for a typical low-mass star is:

Hydrogen in the core is depleted, causing the core to contract and heat up.

Helium fusion begins in the core, producing carbon and oxygen.

The outer envelope of the star expands and cools, becoming a red giant.

Helium fusion occurs in a shell around the carbon-oxygen core.

The star loses mass via stellar winds during the red giant phase.

The core eventually becomes hot enough to fuse carbon and oxygen, producing heavier elements.

The star sheds its outer envelope, exposing the hot core, which becomes a white dwarf.

The white dwarf is surrounded by a planetary nebula, a shell of gas and dust expelled during the final stages of the star's life.

The planetary nebula dissipates over time, leaving behind only the white dwarf.

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Answer:

Soln:

d=30m

t=3s

now:

v=d/t

=30/3

=10

If an object was 1 mm across and it was magnified 10 times, it would be 10 mm across. Magnifying an object is essentially enlarging the object to make it appear bigger than it actually is.

The process of magnification is done by using a magnifying glass, microscope or telescope to focus the rays of light on the object. Magnification is used for various purposes such as reading, science, and even for entertainment.

For example, a magnifying glass can be used to closely observe the details of a small object, while a microscope can be used to study the structure of a cell. Similarly, a telescope is used to observe distant objects in the night sky. Magnification can also be used to create a magnified image of an object which can be viewed on a computer screen.

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Answer:

O a force that opposes motion

Answer:

The Tesla moves approx. 25 meters from rest before reaching 60 mi/hr

Explanation:

Given:

Initial velocity = 0 m/s

Final velocity = 26.8 m/s

Time = 1.9 seconds

Acceleration = change in velocity/time

\(a = \frac{26.8}{1.9}\)

The equation to find displacement (Δx) with given starting and final velocity, time, and acceleration is:

\(x = x_{0} + v_{0}t + \frac{1}{2} at^{2}\)

Starting position and initial velocity both equal 0, so

\(x = \frac{1}{2} at^{2}\)

\(x=\frac{1}{2} (\frac{26.8}{1.9})(1.9)^{2}\)

x = 25.46m

Rounded to the nearest whole number, x = 25m

The common pressure that will exist in the two containers is approximately 1.63 atm when one container is raised to 130°C while the other remains at 0°C.

To find the common pressure that will exist in the two containers, we can use the combined gas law:

(P1 × V1) / T1 = (P2 × V2) / T2

Given:

V1 = V2 = 100 cm³

T1 = 0°C = 273 K (Convert to Kelvin)

T2 = 130°C = 403 K (Convert to Kelvin)

P1 = 1.40 atm

Using the combined gas law, we can solve for P2:

(P2 × 100 cm³) / 403 K = (1.40 atm × 100 cm³) / 273 K

P2 = (1.40 atm × 100 cm³ × 403 K) / (100 cm³ × 273 K)

P2 ≈ 1.63 atm

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Answer:

Below :)

Explanation:

A) 720/3 =240.  40 per minute.

B)  720/180 = 4 per second.

C)  T=1/4 s^-1 (the formula) = 1/4 s. (The time peroid.)

D)  V=1/T

     V= 4 Hz

\(\qquad\qquad\huge\underline{{\sf Answer}}\)

An oscillator makes 720 vibrations in 3 minutes. so, we have to solve the given problems based on it ~

#1. what's the number of vibrations per minute •

\(\qquad \sf  \dashrightarrow \: 3 \: min = 720 \: vib\)

\(\qquad \sf  \dashrightarrow \: 1 \: min = \dfrac{720}{3} \)

\(\qquad \sf  \dashrightarrow \: 1 \: min = 240 \: vib\)

#2. Calculate unit vibrations per second •

\(\qquad \sf  \dashrightarrow \: 1 \: min = 240 \: vib\)

\(\qquad \sf  \dashrightarrow \: 60 \: sec = 240 \: vib\)

\(\qquad \sf  \dashrightarrow \: 1 \: sec = 4 \: vib\)

#3. What's it's time period •

time taken to do 1 vibration is known as a period, so we can infer that :

\(\qquad \sf  \dashrightarrow \: 1 \: vib = \dfrac{1}{4} \: sec\)

\(\qquad \sf  \dashrightarrow \: t = 0.25 \: sec\)

#4. what is it's frequency in hert •

\(\qquad \sf  \dashrightarrow \: f = \dfrac{1}{t} \)

\(\qquad \sf  \dashrightarrow \: f = \dfrac{1}{0.25} \)

\(\qquad \sf  \dashrightarrow \: f = 4 \: hertz\)