Final answer:
Pictures of valleys on a planet's surface can indicate the presence of water, a critical natural resource, whereas other features like craters or rocks might suggest different geological aspects but not specific resources.
Explanation:
When considering pictures of a planet's surface to provide evidence about the planet's natural resources, there are specific indicators to look for. For instance, valleys often signify past or present water flow, as they are typically formed by this process. Figure 10.30 from Gale Crater and Underground Ice Deposits demonstrates this, showing cross-bedded sandstone, which geologists interpret as evidence of liquid water activity. Therefore, valleys on a planet's surface can indicate the presence of water, which is a crucial natural resource. Other features, such as craters or rocks, may suggest geological activity, age, or the presence of minerals, but not necessarily specific resources like gold or natural gas without additional data.
Help ASAP, will give you brainliest!
When conducting an experiment to determine what effect the temperature of water has on the solubility of sugar, what variable(s) should remain constant?
I. The amount of water used.
II. The temperature of the water.
III. The type of sugar used.
IV. The surface area of the sugar.
V. The agitation applied to the solution.
A. I, III, IV, and V
B. All of these
C. I and III only
D. II only
Answer:
c
Explanation:
What is the theory of plate tectonics?
Answer:
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
Explanation:
Question 6 (1 point)
Which fundamental force has not been successfully united with the others in a
particle accelerator?
- weak nuclear force
- electromagnetism
- strong nuclear force
- gravity
Answer:gravity
Explanation:
i just took the test and it was right!
Gravity is the fundamental force that has not been successfully united with the other forces in a particle accelerator; the others have been unified into the Standard Model of Physics. The correct option is gravity.
The fundamental force that has not been successfully united with the others in a particle accelerator is gravity. While the weak nuclear force, electromagnetism, and strong nuclear force are unified into a Standard Model of Physics, gravity, described by General Relativity, has so far eluded integration into this framework.
Attempts to create a theory that unifies gravity with the other forces are referred to as a 'theory of everything'. The electromagnetic and weak nuclear forces have already been unified into the electroweak force, and physicists have considered the possibility of a grand unified theory that would also include the strong nuclear force.
However, gravity remains separate due to its unique properties and the fact that it is a long-range force mediated by hypothetical particles called gravitons, which, unlike the particles associated with the other forces, have not been observed.
The circuit is working, and all three bulbs are lit. If a switch at A is opened,
what will happen to the circuit?
A
B
Cc
O
A. Bulbs 1 and 2 will go out, but bulb 3 will remain lit.
O
B. Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
O
c. All three bulbs will stay lit.
O
D. All three bulbs will go out
If a switch at A is opened, Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
What is parallel and series combination?Parallel combination : When two or more resistances are connected between the same two points, they are said to be connected in parallel combination. In parallel combination , current get divided and voltage across the circuit remains same .
In a series combination the electric components are connected end to end along a same line . In series combination current remain same in whole circuit but voltage get divided.
It can be observed from the diagram that all three bulbs are connected in parallel combination not in series , hence current will divide in each branch and voltage remain same across each bulb . Current will flow in each branch except in the branch where bulb 1 is connected because switch A is open . Since, in branches where bulb 2 and 3 are connected current is flowing and circuit is complete , both the bulbs will glow except bulb 1.
correct option will be : B) Bulb 1 will go out, but bulbs 2 and 3 will remain lit.
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You're driving down the road at 30 m/s when you see an ambulance approaching you from behind. If you measure the peak frequency of its siren to be 320 Hz when it's behind you and 300 Hz after it's passed you, how fast is the ambulance driving? Assume the speed of sound in air to be 340 m/s
Answer:
39.45 m/s
Explanation:
This phenomenon is known as Doppler Effect, and it occurs when there is a source of a wave in motion with respect to an observer. In such situation, the frequency of the wave as perceived by the observer is shifted with respect to the real frequency.
In particular:
- The observed frequency is higher if the source is moving towards the observer
- The observed frequency is lower if the source is moving away from the observer
The formula to calculate the apparent frequency in the Doppler Effect is:
[tex]f'=\frac{v \pm v_o}{v\pm v_s}f[/tex]
where
f is the real frequency
f' is the observed frequency
v is the speed of the wave
[tex]v_s[/tex] is the velocity of the source, which is positive if the source is moving away, negative if it is moving towards the observer
[tex]v_o[/tex] is the velocity of the observer, which is negative if the observer is moving away, positive if it is moving towards the source
In this problem:
v = 340 m/s is the speed of sound
- When the ambulance is approaching you from behind,
f' = 320 Hz
[tex]v_o=-30 m/s[/tex] (car is moving away from ambulance)
So
[tex]320 = \frac{340-30}{340 -v_s}f[/tex] (1)
- When the ambulance overcomes you and moves away from you,
f' = 300 Hz
[tex]v_o=+30 m/s[/tex] (car is moving towards ambulance)
So
[tex]300 = \frac{340+30}{340 +v_s}f[/tex] (2)
Re-arranging both equations (1) and (2),
1)
[tex]320 = \frac{310}{340 -v_s}f\\320(340-v_s)=310f\\108,800-320v_s = 310 f[/tex]
2)
[tex]300 = \frac{370}{340 +v_s}f\\300(340+v_s)=370f\\102,000+300v_s = 370f[/tex]
Both equations can be rewritten as
[tex]f=\frac{108,000-320v_s}{310}\\f=\frac{102,000+300v_s}{370}[/tex]
And by equating them we find:
[tex]\frac{108,000-320v_s}{310}=\frac{102,000+300v_s}{370}\\37(10,800-32v_s)=31(10,200+30v_s)\\399,600-1184v_s=316,200+930v_s\\83,400=2114v_s\\v_s=\frac{83400}{2114}=39.45 m/s[/tex]
(PLEASE HELP) Which of the following describes an element?
A. Matter made up of only one type of atom
B. A substance made of two or more types of atoms
C. Two or more types of atoms chemically bonded together
D. Two or more types of atoms that are not chemically bonded
Answer:
A
Explanation:
A short ramp and a long ramp each reach a height of 1 m. Which
ramp has a greater mechanical advantage?
Answer:
he longer ramp has more mechanical advantage for it requires less force to push up a mass while being over a longer period of time. Its called Mechanical Advantage because say you had to lift a car up 1-meter. you cannot simply pick it up, but over a long enough slope you would be able to because you can apply a small force over a longer distance
Explanation:
There is a short ramp and a long ramp both have a height of 1 meter. So, the greater mechanical advantage is with the long ramp.
What is Momentum?Momentum is created by multiplying a particle's mass by its speed. It is a vector quantity. The temporal rate of change in momentum is equal to the force applied to the particle, according to Isaac Newton's second law of motion.
The impulse, which is the product of the force and the time interval (the impulse), is equal to the change in momentum, according to Newton's second law, if a constant force operates on a particle for a specified amount of time. The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.
The longer ramp provides a greater mechanical advantage since it can lift a mass over a greater distance with less effort. Say you had to raise a car up a meter, that's why it's termed the "Mechanical Advantage." Although you cannot just pick it up, if the slope were long enough, you might be able to do it since a tiny force could be applied over a greater distance.
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The gravitational force between which two objects would be the most difficult to notice?
A.
a water particle and an air particle
B. the Moon and a water particle
C. the Moon and the Earth
D. the Earth and the Sun
Reset
Submit
Help on this physics question please! Much appreciated! It is on frequency of a pendulum
Answer:
Time period = 2*0.79 s = 1.58 s
Frequency = 1/TimePeriod = 0.63 Hz
Explanation:
Time period of the pendulum is the time taken to come back to the exact same position. so if you start from top left, the time period is the time taken when the pendulum comes back up to top left.
Pls Help i’ll give u a brainlest
What part of the electromagnetic spectrum can humans see?
A. visible light
B. radio waves
C. gamma rays
D. x-rays
Answer: A.visible light
Explanation:
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to 740 nanometers.
Final answer:
Humans can see the part of the electromagnetic spectrum known as visible light, which ranges from 380 nm to 740 nm in wavelength. (option A)
Explanation:
The part of the electromagnetic spectrum that humans can see is known as visible light. This is a small portion of the larger electromagnetic spectrum which also includes other types of waves such as radio waves, gamma rays, x-rays, ultraviolet light, infrared light, and microwaves.
The visible light spectrum for humans ranges from wavelengths of approximately 380 nanometers (nm) to 740 nanometers. Beyond the scope of human vision, other species can detect different parts of the spectrum; for example, bees can see ultraviolet light and some snakes can detect infrared radiation.
How do newton's laws relate to speed, velocity and acceleration?
Answer:
Explanation:
first law- an object at rest will stay ay rest, an object in motion will stay in motion
second law- acceleration is directly proportional to the net force A=F/M
third law-for every action force there is a reaction force equal in strength and opposite direction
hope this helps
What is the difference between a mechanical wave and an electromagnetic wave?
O
A mechanical wave travels through empty space, while an electromagnetic wave travels through matter.
O A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.
O A mechanical wave has a high frequency, while all electromagnetic waves have low frequencies.
O Amechanical wave travels through matter, while an electromagnetic wave travels through empty space.
Answer:
D
Explanation:
Mechanical waves need a mater interference to be able to travel. Electromagnetic waves are able to travel through empty space or in a vacuum.
The main difference between mechanical waves and electromagnetic waves is that mechanical waves require a medium to travel, while electromagnetic waves can travel through a vacuum.
The fundamental difference between a mechanical wave and an electromagnetic wave lies in how they travel. Mechanical waves require a medium (solid, liquid, or gas) to propagate, meaning they cannot travel through a vacuum. Examples include sound waves and water waves.
In contrast, electromagnetic waves, such as light and radio waves, can travel through both matter and empty space; they do not need a medium to propagate. This ability to travel through a vacuum is due to the fact that electromagnetic waves are generated by the vibration of electric and magnetic fields, which are perpendicular to each other and to the direction of wave travel.
Which of the Materials are conductors?(select all apply)
Answer:
mechanical pencil lead
iron
silver
brass
copper
yarn
An athlete throws a ball straight upward with an initial speed of 12 meters per second. The ball
reaches a maximum height and then falls back down toward the athlete. What are the
magnitudes of the velocity and acceleration of the ball at its maximum height?
O A. velocity = 0 m/s; acceleration = 0 m/s
B. velocity = 0 m/s, acceleration = 9.8 m/s
O C. velocity = 12 m/s; acceleration = 0 m/s
OD. velocity = 12 m/s; acceleration = 9.8 m/s
Answer:
B. velocity = 0 m/s, acceleration = 9.8 m/s
Explanation:
When the ball reaches the maximum height all energy is potential energy. Because of that, the kinetic energy of the ball is zero and the velocity is also zero. The acceleration of the ball is in all trajectory the gravitational constant, because the gravitational force always acts over the ball.
Hence, the velocity is 0m/s and the acceleration is 9.8m/s^2
B. velocity = 0 m/s, acceleration = 9.8 m/s
The ball's velocity is zero at its maximum height and its acceleration is still 9.8 m/s² due to gravity.
Explanation:The magnitudes of the velocity and acceleration of the ball at its maximum height are velocity = 0 m/s and acceleration = 9.8 m/s² respectively.
When the ball reaches its maximum height, its velocity is zero because it momentarily stops moving before reversing its direction and falling back down. However, the acceleration due to gravity is still acting on the ball, pulling it downward with a constant acceleration of 9.8 m/s².
So, the correct answer is option B. velocity = 0 m/s; acceleration = 9.8 m/s².
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PLEASE HELP IM DUMB!!!
According to the diagram, which statement is true?
A wavelength is consistent and does not vary.
A wave with a shorter wavelength has higher frequency.
A change in frequency will not be reflected in the wavelength.
A wave with a longer wavelength has higher frequency.
Answer:
I believe its: A wave with a shorter wavelength has higher frequency
According to the diagram, the wavelength with a shorter wavelength has higher frequency. Thus, the correct option is B.
What is a Wave?A wave is a disturbance in a medium which carries energy without a net movement of particles in the medium. A wave may take the form of elastic deformation, a variation of the pressure, electric or magnetic intensity, electric potential, or the temperature of the medium or surrounding atmosphere.
Wavelength can be defined as the distance between identical points such as troughs and crusts in the adjacent cycles of a waveform signal which propagated in space or along a wire. Wavelength is inversely proportional to the frequency of wave.
Therefore, the correct option is B.
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Why is having a scientific model of the atom important? (2 points)
Models are used to prove which scientist is correct in a debate.
It is impossible to predict how atoms behave in nature.
The atom is the smallest known particle in the universe.
The model allows us to predict how atoms will behave in certain situations.
model are used to predict how the atom behave
Answer:
The model allows us to predict how atoms will behave in certain situations.
Explanation:
A child picks up a tennis ball tied to the end of a rope. He swings the rope around, over his head, in a circle. Once the ball is spinning, he lets go of the string and the ball goes flying. Explain which of the following images correctly shows which way the ball will fly and why.
Answer:
Plan A
Explanation:
Acceleration in a circle is toward the center of the circle, while velocity is always a straight line that's tangent to the circle. When the boy let's go of the rope the Acceleration toward the center of the circle disappears. The v ball then follows the straight path, tangent to the circle.
Carrie has the following assets and liabilities. What is her net worth?
Assets
car - $3,500
savings - $1,000
cash - $80
earnings - $120
Liabilities
car loan - $3,000
credit card - $500
$12,000
$1,200
$500
$8,200
Answer:
Carrie’s net worth is -20700
Explanation:
Net Worth = Total Assets - Total Liabilities
Total Assets = $3500 + $1000 + $80 + $120 = $4700
Total Liabilities = $3000 + $500 + $12000 + $1200 + $500 + $8200 = $25400
$4700 - $25400 = -20700
So, her Net worth is -20700, in other words, her liabilities are greater than her assets
Carrie's net worth is calculated by subtracting her total liabilities ($22,200) from her total assets ($4,700). This results in a net worth of -$17,500.
Explanation:To determine Carrie's net worth, we first add up all her assets. This includes her car ($3,500), savings ($1,000), cash ($80), and earnings ($120), which adds up to a total of $4,700. We then add up her liabilities, which include her car loan ($3,000), credit card debt ($500), and the additional liabilities listed which total $22,200. Subtracting the total liabilities from the total assets ($4,700-$22,200), we find that Carrie's net worth is -$17,500.
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Which best summarizes the results of Mendel’s pea plant experiments?
Gregor Mendel's experiments with pea plants led to the discovery of heredity's basic principles, the consistent 3:1 ratio in second-generation offspring, and the independent assortment of genes.
Summary of Mendel's Pea Plant Experiments
Gregor Mendel's groundbreaking experiments with pea plants established the basic principles of heredity and genetics. Mendel meticulously recorded the inheritance patterns of seven distinct pea plant traits, including flower color, and discovered that traits are passed on to offspring in a predictable manner. The key findings were:
True-breeding plants, when self-fertilized, consistently produce offspring with identical traits.
Offspring resulting from crosses between different true-breeding plants showed a dominant phenotype in the first generation (F₁).
In the second generation (F₂), a 3:1 ratio of the dominant to recessive phenotypes was observed, revealing the discrete and independent assortment of genes.
These results led to the formulation of Mendel's laws of segregation and independent assortment, which explain how traits are inherited separately from each other.
7. All electromagnetic waves travel at the same speed in empty space, the
speed of light
Answers:
•True
•False
Answer:
TRUE
Explanation:
Answer:
True
Explanation:
All electromagnetic waves travel at the same speed through empty space. That speed, called the speed of light, is 300 million meters per second (3.0 × 108 m/s).
What are the two requirements for glue to work (form a bond between two materials.)
Final answer:
Glue requires particles to collide with sufficient energy and proper orientation to break old bonds and form new ones, relying on adhesive and cohesive forces.
Explanation:
For glue to effectively form a bond between two materials, there are two fundamental requirements. First, the particles must collide with each other. Without this collision, the atoms from the different materials cannot come into close enough contact to form a bond. Second, these colliding particles must come together with sufficient energy to break existing bonds and form new ones. Additionally, the particles must have the proper orientation during the collision to allow the right atoms to come into contact and form the new bond.
It is also important to understand the types of forces at play: cohesive forces, which bind molecules of the same type together, and adhesive forces, which bind a substance to a surface. In chemical bonds, electrostatic forces are crucial as they involve the attraction of positively charged nuclei to negatively charged electrons, leading to a bonding interaction when the system's energy is lowered.
Can you please answer this question?
The pressure graph that matches the simulation shown above is Graph C
What is the graph?The simulation shows a longitudinal wave traveling from left to right. The pressure graph of a longitudinal wave shows regions of high pressure (compression) and low pressure (rarefaction).
So, Graph C shows a region of high pressure followed by a region of low pressure, which matches the simulation. Graph A shows a region of low pressure followed by a region of high pressure, which is the opposite of what is shown in the simulation. Graph B shows two regions of high pressure separated by a region of low pressure. This does not match the simulation , which shows only one region of high pressure.
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Describe three risks or disadvantages of nuclear
power.
Answer:
Fuel for nuclear power plants is a radiation hazard to miners and other nuclear power workers. Nuclear waste requires long-term storage. Mining nuclear fuels can damage the environment. Human error at plants can lead to meltdowns, which endanger the environment and human health. Natural disasters can lead to radiation leaks. Though currently abundant, nuclear fuels are nonrenewable resources.
Explanation:
this is the sample answer :)
Three Risks or disadvantages of nuclear power
Accidents: The rate of accidents occuring when handling nuclear power. the right equipment to contain this is are not available in large amountsGeneration of nuclear wastes that are very toxic to manIt leaves a long lasting negative impact on the environment.Meaning of Nuclear PowerNuclear power is a form of power derived from nuclear subtances and elements. it can also be called nuclear energy.
This type of power is quite expensive to maintain and most time the power is really high and unable to control.
In conclusion, nuclear power has high risk and disadvantages that must be consider, a few has bee described above
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The force that slows or prevents movement of objects in contact with each other is called ____
A. Gravity
B. Momentum
C. Inertia
D. friction
Answer:
D. friction is the correct choice.
Explanation:
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism.
Answer:
friction
Explanation:
hope it helps :)
Bumper car A (281 kg) moving
+2.82 m/s makes an elastic
collision with bumper car B
(209 kg) moving -1.72 m/s. What
is the velocity of car B after the
collision?
(Unit = m/s)
Remember: right is +, left is -
The velocity of car B after the collision is -0.21 m/s.
Explanation:When the two bumper cars collide elastically, their momentum is conserved. We can use the principle of conservation of momentum to solve this problem.
The formula for calculating the final velocity of car B is:
VB,f = ((mA - mB) * VA,i + 2 * mB * VB,i) / (mA + mB)
Substituting the given values:
VB,f = ((281 kg - 209 kg) * 2.82 m/s + 2 * 209 kg * (-1.72 m/s)) / (281 kg + 209 kg) = -0.21 m/s.
Therefore, the velocity of car B after the collision is -0.21 m/s.
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The correct answer is that the velocity of car B after the collision is approximately +1.00 m/s.
To solve this problem, we use the principle of conservation of momentum in an elastic collision. The total momentum before the collision must equal the total momentum after the collision. Additionally, in an elastic collision, kinetic energy is also conserved.
Let's denote the initial velocities of car A and car B as [tex]\( v_{A1} \) and \( v_{B1} \)[/tex], and the final velocities as [tex]\( v_{A2} \) and \( v_{B2} \)[/tex]. The masses of car A and car B are [tex]\( m_A \) and \( m_B \)[/tex], respectively.
Given:
[tex]- \( m_A = 281 \) kg[/tex]
[tex]- \( m_B = 209 \) kg[/tex]
[tex]- \( v_{A1} = +2.82 \) m/s (moving to the right)[/tex]
[tex]- \( v_{B1} = -1.72 \) m/s (moving to the left)[/tex]
We need to find [tex]\( v_{B2} \)[/tex], the final velocity of car B.
Using the conservation of momentum:
[tex]\[ m_A \cdot v_{A1} + m_B \cdot v_{B1} = m_A \cdot v_{A2} + m_B \cdot v_{B2} \][/tex]
[tex]\[ (281 \text{ kg} \cdot 2.82 \text{ m/s}) + (209 \text{ kg} \cdot -1.72 \text{ m/s}) = (281 \text{ kg} \cdot v_{A2}) + (209 \text{ kg} \cdot v_{B2}) \][/tex]
Using the conservation of kinetic energy:
[tex]\[ \frac{1}{2} m_A \cdot v_{A1}^2 + \frac{1}{2} m_B \cdot v_{B1}^2 = \frac{1}{2} m_A \cdot v_{A2}^2 + \frac{1}{2} m_B \cdot v_{B2}^2 \][/tex]
[tex]\[ (281 \text{ kg} \cdot (2.82 \text{ m/s})^2) + (209 \text{ kg} \cdot (-1.72 \text{ m/s})^2) = (281 \text{ kg} \cdot v_{A2}^2) + (209 \text{ kg} \cdot v_{B2}^2) \][/tex]
We now have two equations with two unknowns [tex](\( v_{A2} \) and \( v_{B2} \))[/tex]. We can solve these equations simultaneously to find the velocities after the collision.
Solving these equations, we find that the final velocity of car B, [tex]\( v_{B2} \)[/tex], is approximately +1.00 m/s. This means that after the collision, car B is moving to the right with a speed of 1.00 m/s.
The exact calculations would involve algebraic manipulation and possibly the use of a quadratic formula, but the final result is that car B moves to the right with a velocity of +1.00 m/s after the collision.
If the frequency of an electromagnetic wave is increased, what happens to the
energy?
Answer:
Electromagnetic waves can bring energy into a system by virtue of their electric and magnetic fields. ... If the frequency of the electromagnetic wave is the same as the natural frequencies of the system (such as microwaves at the resonant frequency of water molecules), the transfer of energy is much more efficient.
Answer:As a wave's wavelength increases, the frequency decreases, and as wave's wavelength decreases, the frequency increases. When electromagnetic energy is released as the energy level increases, the wavelength decreases and frequency decreases.
Explanation:
google lol
Work and energy have the same units because
A. the words "work" and "energy" are interchangeable.
OB. work is a measurement of the transfer of energy.
C. work opposes energy.
D. whenever work is lost, energy is gained.
Answer:
A. the words "work" and "energy" are interchangeable.
Explanation:
Work and kinetic energy are interchangeable, so they are the same, ie. they have the same units. Your work can give kinetic energy to a body and a body with kinetic energy can produce work
A circuit has a current of 2 A. If the resistance in the circuit decreases to one-fourth of its original amount while the voltage
emains constant, what will be the resulting current?
0.5 A
2A
4A
BA
Answer:
two ampheres
Explanation:
the formula for calculating voltage is V=IR so if the current which is I is 2 and the resistance which is R is decreased to one forth then we will say
R=x multiplied by 1/4=x/4
V=2x/4 cross multiply then we have
since the voltage is constant then it is=1
so 4=2x divide both sides by 2 we then get 2 as our answer
Answer:8a
Explanation:
An 3-kg object is dropped from a height of 5 m. The rock has an impact speed
of
Final answer:
The impact speed of a 3-kg object dropped from a height of 5 meters, assuming no air resistance and complete conversion of potential to kinetic energy, will be 9.9 m/s. The calculation is based on the Principle of Conservation of Energy using the formulas for potential and kinetic energy.
Explanation:
The question refers to calculating the impact speed of an object that has been dropped from a certain height, considering the transformation of potential energy into kinetic energy. This is a subject matter ofPhysics,specifically, it relates to the Principle of Conservation of Energy and kinematics which are typically taught in High School level physics classes.
When an object is dropped from a height and is acted upon only by gravity, the potential energy that the object has due to its height is converted to kinetic energy as it falls. Assuming no air resistance, this transformation is complete, and the kinetic energy at impact can be given by:
KE = ½mv²
Where KE is kinetic energy, m is mass, and v is velocity. The potential energy (PE) the object has before it falls is given by:
PE = mgh
Where g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height from which the object falls. At the moment of impact, the potential energy will have been converted into kinetic energy (if we're ignoring air resistance), so we can set these equal to each other to solve for v:
½mv² = mgh
By canceling out the mass and solving for v, we find:
v = √(2gh)
Using the given height of 5 m, we can compute the velocity:
v = √(2 * 9.8 m/s² * 5 m) = √(98 m²/s²) = 9.9 m/s
The velocity of the rock as it hits the ground would therefore be 9.9 m/s if dropped from a height of 5 meters with no air resistance. This differs from the incorrect value of 5.0 m/s that was mentioned in the prompt.