Answer:
Cotton balls, soil and gravel
Explanation:
The independent variable in an experiment is the variable that is exposed to the change or which undergoes changes as per the experimenter. The changes are brought in order to calculate the significant change in the dependent variable.
In the experiment conducted by Janessa, cotton balls, soil and gravel are the independent variables that are induced by her. The dependent variable in this experiment is the measurement and recording of the growth of the plant. She conducted the experiment to calculate as to which material would be best suited for the lima beans to sprout.
Answer:
"the distance between the magnet and the object"
Explanation:
I just did this on study island and got it right!
What gravitational attraction does the moon have on the earth? (mass of earth is 6 x
1024 kg, mass of moon is 7.4 x 1022 kg and distance between earth and moon is 3.8 x 108 m).
Answer:
The moon's gravitational pull on the Earth is the main cause of the rise and fall of ocean tides. The moon's gravitational pull causes two bulges of water on the Earth's oceans—one where ocean waters face the moon and the pull is strongest and one where ocean waters face away from the moon and the pull is weakest.
Explanation:
Describe the famous experiment related to gravity that Galileo may have performed. Include the results. Also, state whether the results support the law of gravity. Explain your answer.
Answer:
Galileo performed a famous experiment where he used a ball rolling on a ramp (inclined plane) to study the motion of objects under the influence of gravity. The ramp allowed him to make more precise measurements because the ball moved more slowly along the ramp than if it were simply dropped. Galileo discovered through this experiment that the objects fell with the same acceleration, proving his prediction true, while at the same time disproving Aristotle's theory of gravity (which states that objects fall at speed proportional to their mass). Galileo's conclusion from this thought experiment was that no force is needed to keep an object moving with constant velocity. Newton took this as his first law of motion. One result of the experiment surprised Galileo, and one surprises us. Galileo found that the heavy ball hit the ground first, but only by a little bit. Except for a small difference caused by air resistance, both balls reached nearly the same speed. And that surprised him. According to history, Galileo’s experiment on falling bodies largely contributed to Isaac Newton’s Law of Gravity. In Galileo’s experiment, he is said to have dropped balls from the Leaning Tower of Pisa. The balls were made of the same material but had different masses. Galileo set out to prove that the time it took for these objects to reach the ground would be the same. Galileo proved that objects reached the ground at the same time.
Explanation:
Copy and pasted from Thawkins000
Galileo is renowned with demonstrating that gravity causes things of varying masses to fall with the same acceleration by dropping weights from the Leaning Tower of Pisa.
What is gravitational force?Gravitational force is the force by which an object attracts other objects into its center of mass. Earth attracts every objects into its ground and that's why we are all standing on the surface.
The Pisa-Tower experiment by Galileo reached at some results that a heavy object and a light object will fall to the ground simultaneously from a particular height.
All bodies of any mass will fall down simultaneously at the same time from a particular height. That is the acceleration of all free-falling bodies are same. We know that acceleration is the ratio of force and mass.
The force exerted on a bigger body is greater than the smaller ones in the same force field. This implies acceleration remains constant in the case of all free-falling bodies.
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Q18: A cube of aluminum has an edge length of 20 cm. Aluminum has a
density of 2.7 g/cm and a specific heat of 0.217 cal/ g.°С. When
the internal energy of the cube increases by 47000 cal its temperature
increases by:
A
B
C
D
E
5 °C
10 °C
20 °C
100 °C
200 °C
Answer:
10 °C
Explanation:
From the question given above, the following data were obtained:
Egde length (L) of aluminum = 20 cm
Density of Aluminum = 2.7 g/cm³
Specific heat capacity (C) of aluminum = 0.217 cal/ g°С
Heat (Q) energy = 47000 cal
Change in Temperature (ΔT) =?
Next, we shall determine the volume of the aluminum. This can be obtained as follow:
Egde length (L) of aluminum = 20 cm
Volume (V) of aluminum =?
V = L³
V = 20³
V = 8000 cm³
Thus, the volume of the aluminum is 8000 cm³
Next, we shall determine the mass of the aluminum. This can be obtained as follow:
Density of Aluminum = 2.7 g/cm³
Volume of Aluminum = 8000 cm³
Mass of aluminum =.?
Density = mass/volume
2.7 = mass /8000
Cross multiply
Mass of aluminum = 2.7 × 8000
Mass of Aluminum = 21600 g
Finally, we shall determine the change in temperature of the aluminum as follow:
Specific heat capacity (C) of aluminum = 0.217 Cal/g°С
Heat (Q) energy = 47000 Cal
Mass (M) of Aluminum = 21600 g
Change in Temperature (ΔT) =?
Q = MCΔT
47000 = 21600 × 0.217 × ΔT
47000 = 4687.2 × ΔT
Divide both side by 4687.2
ΔT = 47000 / 4687.2
ΔT = 10 °C
Therefore, the increase in the temperature of the aluminum is 10 °C.
The change in temperature of this cube of aluminum is equal to: B. 10°C
Given the following data:
Edge length, L = 20 cm.Density of Aluminum = 2.7 g/cmSpecific heat capacity (C) of aluminum = 0.217 Cal/g°СInternal energy = 47000 calories.To find the change in temperature of this cube of aluminum:
First of all, we would determine the volume of this cube of aluminum.
[tex]Volume \;of \;a \;cube = L^3\\\\Volume \;of \;a \;cube = 20^3\\\\Volume \;of \;a \;cube = 8000\; cm^3[/tex]
Next, we calculate the mass of this cube of aluminum:
[tex]Mass = Density \times Volume\\\\Mass = 2.7 \times 8000[/tex]
Mass = 21,600 grams.
Now, we can find the change in temperature of this cube of aluminum:
Mathematically, the quantity of heat energy is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the quantity of heat energy. m represents the mass of an object. c is the specific heat capacity. ∅ is the change in temperature.Substituting the parameters into the formula, we have;
[tex]47000 = 21600 \times 0.217 \times \theta\\\\47000 = 4687.2 \theta\\\\ \theta =\frac{47000}{4687.2} \\\\ \theta = 10.03[/tex]
Change in temperature = 10°C
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Charmander is furious; he kicks a rock with a mass of 20.0 kg, straight up in the air. The net force on the rock is
230N.
a) How much does the rock weigh?
b) How hard did Charmander kick the rock?
c) What is the acceleration of the pokémon
(a) The rock has a weight w according to
w = m g
where m is its mass and g = 9.80 m/s² is the magnitude of the acceleration due to gravity. So
w = (20.0 kg) (9.80 m/s²) = 196 N
(b) Charmander kicks the rock with an upward force (magnitude f ) that overcomes the weight of the rock, and the net force on it is 230 N. This means
f - w = 230 N
f - 196 N = 230 N
f = 426 N
(c) I think the question is supposed to say, "What is the acceleration of the rock," and not asking about Charmander's acceleration. By Newton's second law, the net force on the rock is equal to its mass times its acceleration:
230 N = (20.0 kg) a
a = (230 N) / (20.0 kg)
a = 11.5 m/s²
describe the difference between particle motion in solids and liquids.
Answer:
Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
i hope this helps your answer
Answer:
liquids vibrate, move about, and slide past each other. solids vibrate but generally do not move from place to place.
the metric unit to measure work which equals one newton meter
is called?
Giving brainliest someone help pls
Answer: Metalloids
Explanation:
hope this helps!
What phenomenon causes an apparent change in the color of a star moving
toward or away from an observer?
A. blueshift
B. doppler
C. cosmological redshift
D. redshift
Answer: The answer is B. Doppler
Explanation: This change is a common physical demonstration of the Doppler effect. The Doppler effect describes the change in the observed frequency of a wave when there is relative motion between the wave source and the observer
Doppler causes an apparent change in the color of a star moving toward or away from an observer.
What does the Doppler effect cause an apparent exchange?The Doppler effect is the plain trade-in frequency of a wave because the supply of the wave is transferring toward or away from an observer or vice-versa. Any object that emits waves, whether sound waves or electromagnetic waves, could have a real frequency of emitting waves and an obvious frequency.
How does the Doppler shift affect the coloration of a star?A decreased frequency shift is called a "red shift". The faster a celeb moves far from the earth, the more its mild is shifted to lower-frequency colorations. This impact is referred to as the "Doppler shift".
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The acceleration of gravity on the
Moon is 1.62 m/s2. The mass of the
Moon is 7.35 x 1022 kg. From this
information, what is the radius of the
Moon?
Answer:
1.74 x 10^6
Explanation:
Brainliest :)
The approximate radius of the Moon is [tex]1.736 * 10^7[/tex] meters, or 17,360 kilometers.
To find the radius of the Moon, we can use Newton's law of universal gravitation, which relates the acceleration due to gravity (g) to the mass of the celestial body (M) and the distance (radius, r) between the center of the body and the object experiencing the gravitational force.
The formula for the acceleration due to gravity on the surface of a celestial body is:
[tex]g = G * (M / r^2),[/tex]
where:
g = acceleration due to gravity on the Moon's surface ([tex]1.62 m/s^2[/tex]),
G = universal gravitational constant (approximately[tex]6.67430 * 10^{-11[/tex] m^3/kg/s^2),
M = mass of the Moon ([tex]7.35 * 10^{22[/tex] kg), and
r = radius of the Moon (what we want to find).
Let's rearrange the formula to solve for the radius (r):
[tex]r^2[/tex] = G * (M / g).
Now, we can plug in the known values:
[tex]r^2 = (6.67430 * 10^{-11} m^3/kg/s^2) * (7.35 * 10^{22} kg / 1.62 m/s^2)[/tex].
Calculate the value of [tex]r^2[/tex]:
[tex]r^2[/tex] ≈ [tex]3.018 * 10^{14} m^2.[/tex]
Finally, take the square root of both sides to find the radius (r):
r ≈ [tex]\sqrt{(3.018 * 10^{14} m^2)[/tex]≈ [tex]1.736 * 10^7[/tex] meters.
So, the approximate radius of the Moon is[tex]1.736 * 10^7[/tex] meters, or 17,360 kilometers.
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What will happen when a light bulb is removed from the circuit below, leaving a gap?
Question 2 options:
The remaining light bulbs will go out.
The remaining light bulbs will dim.
The brightness of the remaining light bulbs will not change.
The remaining light bulbs will brighten.
Answer:
The remaining light bulbs will go out.
Explanation:
The light bulb that was taken out routed power to the other light bulbs, there for, not giving power to the next light bulbs will make them turn off or, "go out". This may be incorrect, as you did not provide a picture of the circuit.
When a light bulb is removed from the circuit below, leaving a gap, then the other light bulbs in the circuit will go out, which is present in the first option, as the light bulb is a critical component in the circuit.
What is an electrical circuit?In an electrical circuit, all of the components are connected in a specific way to allow the flow of electricity, these components are connected in series, which means that the current flows through each one after the other. In the case of a circuit with multiple light bulbs connected in series, each light bulb acts as a resistor, so when one of the light bulbs is removed, the circuit is broken and the electricity flow is interrupted.
Hence, when a light bulb is removed from the circuit below, leaving a gap, then the other light bulbs in the circuit will go out, which is present in the first option.
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2. In a tug of war contest, one person pulls with a force of 5 Newtons. Another person on the same team pulls with a force of 3 Newtons. In order for the force of the rope to be balanced, what force would the other team need to be pulling with?
a. 5 Newtons
b. 2 Newtons
c. 15 Newtons
d. 8 Newtons
Pls
Answer:
8 newtons
Explanation:
Balanced forces have an equal amount of newtons. 5+3=8, so the other team will need 8 newtons.
In a tug of war contest, one person pulls with a force of 5 Newtons. Another person on the same team pulls with a force of 3 Newtons. In order for the force of the rope to be balanced,force would the other team need to be pulling with is 8 newtons.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
A resultant force vector is described as a single vector that has the same consequence as several other vectors taken together.To create the resulting force vector, two vectors facing the opposite direction are subtracted from one another. Here Net Force = 5 - (-3) = 8 N
In order for the force of the rope to be balanced, force would the other team need to be pulling with is 8 Newtons.
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A population of ducks lives in an area that floods many times each year. Some of the ducks are better at finding food on dry land, while other ducks are better at finding food in wet, muddy areas. Eventually, the land around the lake permanently changes from dry soil to wet, marshy mud. How will this change to the land most likely affect the duck population? The population will remain stable because the ducks will not be affected by this kind of change. The population will eventually balance out so that there are equal numbers of both types of ducks. The population will evolve so that most ducks survive no matter how they find food. The population will evolve so that most ducks are better at finding food in wet, muddy areas.
Answer:
The answer is: The population will evolve so that most ducks are better at finding food in wet, muddy areas.Explanation:
Hope this helps! Have a great day/night!
The population of ducks will evolve so that most ducks are better at finding food in wet areas.
Natural selection:
In evolution, the individual is selected on a certain parameters by nature.
For example- Selection parameter is ability of finding food.
Here, the popution good at finding food in dry places will die and only the individuals with ability to find food in wet places will survive and reproduce.
Therefore, the population of ducks will evolve so that most ducks are better at finding food in wet areas.
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A wholesale club sells eggs by the dozen .Does the table show a proportional relationship between the number of dozen of eggs cost?
Answer:
12 dozen
Explanation:
Answer:
The table is proportional.
Explanation:
You would do 21/6 to get 3.5. Then 28/8 to get 3.5. After 35/10 to get 3.5. Finally 49/14 to get 3.5. If each answer (3.5) is the same than it is proportional.
hope i helped
A proton traveling due west in a region that contains only a magnetic field experiences a vertically upward force (away from the surface of the earth). What is the direction of the magnetic field?
a. east
b. north
c. down
d. west
e. south
Answer:
D
Explanation:
Answer:d
Explanation:
Electromagnetic Waves Mechanical Waves
Transverse Waves Transverse, Longitudinal, and Surface Waves
Do not require a medium Require a medium
Begin with the movement
of charged particles Begin when matter is disturbed
How is the transfer of energy different in electromagnetic waves compared to mechanical waves?
a
Electromagnetic waves requires a source of energy
b
Electromagnetic waves can transfer energy through a vacuum, or empty space
c
Electromagnetic waves create a vibrating electric field
d
Electromagnetic waves can change speed or direction
Answer:A
Explanation:
what is the importance of gravitional force?write any two points.
Explanation:
Gravity is a very important force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space.
It is the glue that holds together entire galaxies. It keeps planets in orbit.
You are holding an apple. It is probably a Honeycrisp apple. Maybe it is a Braeburn apple. Anyway, if you are holding an apple, how could you increase its potential energy
Answer:
You can hold it at a higher level. This creates more tension between the apple and gravity. Creating a higher level of potential energy
A 53 kg person is being dragged in their sleeping bag to the lake by a 401 N force at an angle of 30°
If the person accelerates at a rate of 0.59 m/s2, how much resistive force (force of friction) is acting
on them?
In the horizontal direction, the forces acting on the person are
• friction with magnitude f, opposing motion, and
• the horizontal component of the pulling force (itself with mag. p ) with mag. p cos(30º), in the direction of motion.
There is no friction in the vertical direction, so we omit any discussion of the vertical forces.
By Newton's second law, we then have
p cos(30º) - f = m a cos(30º)
where m is the person's mass, and a is their acceleration so that a cos(30º) is the magnitude of the horizontal component of acceleration. The person is pulled by a force of p = 401 N, so solve for f :
(401 N) cos(30º) - f = (53 kg) (0.59 m/s²) cos(30º)
f ≈ 320 N
A black lift of amber is placed in water and a laser beam travels from the water through the amber. The angle of incidence is 35 degrees while the angle of refraction is 24 degrees. What is the index of refraction of amber
Answer:
Explanation:
refractive index of ember = sin of angle of incidence / sin of angle of refraction
= sin 35 / sin24
= .5735 / .4067
= 1.41
This is refractive index of ember with respect to water
refractive index of ember with respect to water
= wμe = μe / μw
μe = wμe x μw
= 1.33 x 1.41
= 1.87
refractive index of ember with respect to air = 1.87 .
Which of the following is a scalar quantity?
Answer:
55
Explanation:
I hope this answer help u
Answer:
i think no. A is the coeerct answer
hope this will help you
What acceleration will a 1000-kg car experience if a force of 500 N is applied?
Answer:
the answer is 0.5m/s..... see the image for explanation
Question 3 (10 points)
The Ashen One, a character from Dark Souls 3 (a game created by From Software and published by Bandai-Namco) blocks a hit from a boss, using a shield. The boss hits with 1500 N of force. The ashen one doesn't move back when hit.
Which of the following must be true for the forces affecting the Ashen One?
a
The force of kinetic friction is equal to the force applied
b
The maximum force of static friction is almost equal to the force applied
c
The maximum force of static friction is greater than the force applied
d
The force of kinetic friction is greater than the force applied
Question 4 (10 points)
A 4.0 x 10^2 N metal box rests on a level surface. The coefficient of friction between the box and the ground is 0.2 for kinetic friction and 0.3 for static friction A Pikman (a videogame character designed by Nintendo) bashes its head against the box.
If the Pikman hits its head against the box with the following forces at different times, which amount(s) of force would make the box move? Select all that apply.
a
130 N
b
80. N
c
70. N
d
50. N
who plays among us?????
Answer:
i do
Explanation:
. A force of 3.0 N acts through a distance of 12 m in
the directions of the force. Find the work done.
Answer:
The answer is 36 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 3 × 12
We have the final answer as
36 JHope this helps you
A horizontal force is used to pull a 5.0 kilogram cart at a constant speed of 5.0 m/s across the floor. The force of friction between the cart and the floor is 10.0 newtons. What is the magnitude of the horizontal force along the handle of the cart?
5 N
10 N
15 N
20 N
Answer:10N
Explanation:
The mass of a piece of metal is 1200 g. A measuring cylinder contains 150 cm^3 of water. The volume of the metal is 100cm^3. What is the density of the metal
Answer:
12g/cm³
Explanation:
Given parameters:
Mass of the metal = 1200g
Volume of water in the measuring cylinder = 150cm³
Volume of the metal = 100cm³
Unknown:
Density of the metal = ?
Solution:
Density is the mass per unit volume of a substance;
Density = [tex]\frac{mass}{volume}[/tex]
Now insert the parameters and solve;
Density = [tex]\frac{1200}{100}[/tex] = 12g/cm³
What is Darwin's theory of the origin of species?
Answer:
Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
Explanation:
Debbie touches the metal doorknob to her bedroom at 7 a.m. and feels a static electric shock. In the afternoon, Debbie comes back and touches the doorknob again, but she experiences no shock.
Answer:
she had socks one and was shuffeling so she had static
Explanation:
The speed of the incoming water is 25 cm/s and the cross-sectional area of the hose carrying the water is 2.0 cm2. 1) Determine the time required for a 25-L container to be filled with water. (Express your answer to two significant figures.)
Answer:
The time taken is [tex]t = 500 \ s[/tex]
Explanation:
From the question are told that
The speed of the incoming water is [tex]v = 25 cm/s[/tex]
The cross-sectional area of the host pipe is [tex]a = 2.0 cm^2[/tex]
Generally the rate at which the container is been filled is mathematically represented as
[tex]\r V = v * a[/tex]
=> [tex]\r V = 25 * 2[/tex]
=> [tex]\r V = 50\ cm^3/s[/tex]
Generally [tex]2.5 L = 25000 cm^3[/tex]
Generally the time taken is mathematically represented as
[tex]t = \frac{25000}{50}[/tex]
=> [tex]t = 500 \ s[/tex]
The time required for a 25-L container to be filled with water is 8.3 min.
The given parameters;
speed of the water, v = 25 cm/sarea of the hose, A = 2 cm²volume of the container, V = 25 L = 25,000 cm³The volumetric flow rate of the water is calculated as follows;
Q = Av
where;
Q is volumetric flow rate v is the speed of the waterA is the area of the hose[tex]Q = Av\\\\\frac{V}{t}= Av\\\\t = \frac{V}{Av} \\\\t = \frac{25,000}{2 \times 25} \\\\t = 500 \ s\\\\t = 8.3 \min[/tex]
Thus, the time required for a 25-L container to be filled with water is 8.3 min.
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The Sun has a mass of 1.99x10^30 kg and a radius of 6.96x10^8 m. Calculate the acceleration due to gravity, in meters per second, on the surface of the Sun?
Answer:
[tex]g=274\ m/s^2[/tex]
Explanation:
Mass of the Sun, [tex]M=1.99\times 10^{30}\ kg[/tex]
The radius of the Sun, [tex]r=6.96\times 10^8\ m[/tex]
We need to find the acceleration due to gravity on the surface of the Sun. It is given by the formula as follows :
[tex]g=\dfrac{GM}{r^2}\\\\g=\dfrac{6.67\times 10^{-11}\times 1.99\times 10^{30}}{(6.96\times 10^8)^2}\\\\g=274\ m/s^2[/tex]
So, the value of acceleration due to gravity on the Sun is [tex]274\ m/s^2[/tex].
The acceleration due to gravity, in meters per second squared, on the surface of the Sun is [tex]296.88 \;m/s^2[/tex].
Given the following data:
Mass of Sun = [tex]1.99 \times 10^{30}[/tex] kilogramsRadius of Sun = [tex]6.69 \times 10^8[/tex] metersGravitational constant = [tex]6.67 \times 10^{-11}[/tex]
To calculate the acceleration due to gravity, in meters per second squared, on the surface of the Sun:
From the law of gravitational force, we have the formula:
[tex]g = \frac{Gm}{r^2}[/tex]
Where:
g is the acceleration due to gravity.G is the gravitational constant.m is the mass of a planet.r is the radius.Substituting the given parameters into the formula, we have;
[tex]g = \frac{6.67 \times 10^{-11} \times 1.99 \times 10^{30}}{(6.69 \times 10^8)^2} \\\\g= \frac{1.33 \times 10^{20} }{4.48 \times 10^{17}} \\\\g=296.88 \;m/s^2[/tex]
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