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.
PLEASE HELP!!! WILL MARK BRAINLIEST!! Which example is not an electromagnetic wave?
ultraviolet light
infrared light
ultra high frequency sound
visible light
ultra high frequency sound
Explanation:
Ultraviolet light, infrared light, and visible light are all examples of electromagnetic waves.
Ultra high frequency sound, on the other hand, is a type of mechanical wave. Sound waves are mechanical waves that require a medium (such as air, water, or solid) to propagate, while electromagnetic waves do not require a medium and can travel through a vacuum (like in space). Ultra high frequency sound is not classified as an electromagnetic wave
Which value is equivalent to 7.2 kilograms?
A.
720 grams
B.
7,200 grams
C.
72,000 grams
D.
720 milligrams
E.
7,200 milligrams
Answer:
B 7200 grams
As
7.2 kg = 7.2 * 1000 gram = 7200 grams
A flagpole is a simple device on which a flag can be raised or lowered. Which simple machine is usually part of a flag pole?
A) lever
B) wedge
C) pulley
D) inclined plane
Answer:
C, a pulley! A pulley is made of a wheel and rope and in the case of the flagpole, it uses the pulley to raise the flag by pulling the rope.
A 12-kg bowling ball is rolled toward a stationary, 0.9-kg bowling pin at 2.4m/s to the right. After the collision, the bowling ball continues to move in the same direction at 1.3m/s.
Determine the final velocity of the bowling pin.
Answer:
14.6m/s
Explanation:
elastic collision formula
mv1+mv2=mv1'+mv2'
mv1= mass times velocity of the first object
mv2= mass times velocity of the second object
mv1'=mass times velocity of the first object after the collision
mv2= mass times velocity of the second object after the collision.
we know that the pin is not moving so we multiply 0 or its velocity by the mass 0.9kg this equals zero so we don't add this part to the equation.
mv1=mv1'+mv2'
plugin the values and solve using order of operations
12kg(2.4m/s)=12kg(1.3m/s)+0.9kg(v2')
28.8kg.m/s=15.6kg.m/s+0.9kg(v2')
at this point you need to move 15.6kg.m/s to the other side of the equation so subtract 15.6kg.m/s to 28.8kg.m/s
28.8kg.m/s=15.6kg.m/s+0.9kg(v2')
28.8kg.m/s - 15.6kg.m/s= 0.9kg(v2')
finally Divide by 0.9kg in order to leave v2' in one side.
13.2kg.m/s=0.9kg(v2')
13.2kg.m/s÷0.9kg=v2'
14.6kg.m/s=v2'
A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 703.55 g. From this information, calculate the density of carbon tetrachloride.
Answer:
Well, I think the best answer will be is 1.59 g/mL Good Luck!
The density of carbon tetrachloride in the flask is calculated by subtracting the weight of the empty flask from the total weight to get the weight of the carbon tetrachloride. Then, use the formula density = mass/volume, which results to 1.589 g/mL.
Explanation:To calculate the density of carbon tetrachloride in the flask, first determine the weight of the carbon tetrachloride by subtracting the weight of the empty flask from the total weight. So, 703.55 g (the total weight) - 345.8 g (the weight of the flask) = 357.75 g (weight of carbon tetrachloride).
Next, we use the formula for density which is: density = mass/volume. Our mass (weight of carbon tetrachloride) is 357.75 g and our volume is 225 ml. Therefore, the density of carbon tetrachloride is 357.75 g / 225 ml = 1.589 g/mL.
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A semi truck accelerates from rest to 36 m/s in just 12 seconds. What is its acceleration?
Answer:
3 m/sec(squared)
Explanation:
a=change in velocity/time
a=v-u/t
a=36-0=36/12
a=3m/s(squared)
The acceleration is 3 m/s².
To calculate the acceleration, the velocities given are:
Initial velocity u = 0 m/s,
Final velocity v = 36 m/s,
Time, t = 12 seconds.
What is acceleration and how it was calculated?Definition:
Acceleration can be defined as the total change in velocity, i.e., change in final velocity to the change in initial velocity to the total time taken.
Acceleration is a vector quantity as it has both magnitude and direction.
Formula for Acceleration, a = (( v - u) /t ) m/s².
[tex]\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}[/tex]
v = Final velocity
u = Initial velocity
t = Time taken
Substitute all the given values in the formula,
a = ( 36 - 0) / 12
= 36 / 12
a = 3 m/s².
Thus, the truck's acceleration is calculated as 3 m/s².
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please help me asap!!!!!!!
Answer:
you should have given the passage too bt i think option b is correct..
Describe an example where you want to solve for a balanced Fnet= 0N
An unopened door pushed by two people with same force is the example for balanced Fnet=0N
Explanation:
There are two types of forces that acts on an object.
Balanced force and unbalanced force
In balanced force the net force becomes zero as the name itself indicates that the forces acting on the object gets balanced and cancels out each other.
Example:- Consider a door, and if two people with equal forces are trying to push the door. Then the net force becomes zero as the door remains not opened.
In unbalanced force the net force will not be zero as the forces acting on them are not equal.
Example: Soccer game ball pushed by the player is the best example.
The net force describes the sum or all the forces acting in the different directions on an object. When the net force is 0, then the force is balanced, otherwise, it is unbalanced.
A scenario where we have a balanced force would be a situation whereby a box at rest is being pushed in opposite direction.
When the force which tends to propel the box forward is equal to the force which tends to push the ball backward. Then the ball would not move and remain in the same position.
Hence, the net force acting on the box is balanced.
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If you double the amount of mass in a shopping cart by adding food to it, what do you have to do to the force to maintain the same acceleration as you had before? NEED HELP PLZZZZZZ
Answer:
Reduce the force
Explanation:
By newtons third law
F=m×a
or
Force =Mass ×Acceleration
In other words
Acceleration=Force/Mass
If the mass drops, to maintain the same acceleration, you need to reduce the force too
Which property of the wave does the value of two per second describe?
Answer: Frequency
Explanation:
The value of two per second is a measure of the frequency of a wave. It indicates that the wave completes two cycles in one second.
What is the frequency and time period?In physics, frequency and period are two related concepts that are used to describe the properties of waves. Period, on the other hand, is a measure of the time it takes for one complete cycle of a wave.
Here,
Frequency is a fundamental property of waves, and it determines the pitch of sound waves and the color of light waves. Waves with a high frequency have a high pitch or a high color temperature, while waves with a low frequency have a low pitch or a low color temperature.
In general, the higher the frequency of a wave, the more energy it carries and the shorter its wavelength. The relationship between frequency and other properties of waves, such as wavelength and speed, is described by various wave equations and laws in physics.
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Of the eight most abundant elements in earths crust, what percentage does the six next most abundant elements of earths crust make up?
Answer:
the sixth most abundant element in the earth's crust is sodium and it occupies 2.8%
Final answer:
The six next most abundant elements after oxygen and silicon make up 23.7% of the Earth's crust.
Explanation:
The student asked about the percentage of the Earth's crust made up by the six next most abundant elements after oxygen and silicon. Given that Oxygen and Silicon together make up 74.3% of the Earth's crust (46.6% oxygen and 27.7% silicon), we know that the eight most abundant elements constitute 98% of the Earth's crust. To find the combined percentage of the six following most abundant elements, we subtract the percentage of oxygen and silicon from 98%, which is 98% - 74.3% = 23.7%. Hence, aluminium, iron, calcium, sodium, potassium, and magnesium together make up 23.7% of the Earth's crust.
Direct current is produced by
Answer:
A battery
Explanation:
Which energy sources can transfer thermal energy to a heat pump? Check all that apply.
air
the ground
water
gas fuel
wood fuel
Answer:1.Air, 2.the ground,3.water
Explanation:I just got it right:)
Answer:
A, B, C OR 1, 2, 3
Explanation: i got it right
A force of 120.0 N is applied to a 3.00 kg block. What is the average acceleration of the block?
Explanation:
F = ma
120.0 N = (3.00 kg) a
a = 40.0 m/s²
Why does the sun produce energy
Answer:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.
Which statements about light are true? Select all that apply. Select one or more: a. It can travel through empty space. b. It has no mass. c. It has moving electrons. d. It’s made of moving electric and magnetic fields.
Light can travel through empty space (a), has no mass (b) and is made up of moving electric and magnetic fields (d). It does not consist of moving electrons.
Explanation:In analyzing the statements about light, the following are true:
a. It can travel through empty space. This is evident in how sunlight reaches the Earth's atmosphere directly from the sun, traveling through the empty space in the universe. b. It has no mass. Light, whether as a particle or a wave, has no rest mass.d. It’s made of moving electric and magnetic fields. Physicist Maxwell speculated that light was a form of electromagnetic radiation, an electromagnetic disturbance moving at the speed of light. This conclusion has been confirmed in laboratory experiments.Statement c which says light has moving electrons is untrue. Instead, light is made up of particles called photons, which are massless and don't consist of electrons.
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Everything that you can see and touch is made of _______. The only things that are ___________ are ____________________ such as _________ and ____________.
The first blank is matter I'm not sure about the rest
Answer:
Matter
invisible
Things
nothing
nothing
Explanation:
I sounds like it goes there. :D
Read the sentence form the section "Heavy Weights Can Be Trouble for Teens." Other schools that use the program are leery of the weight lifting. Which of the following words, if it replaced the word "leery" would CHANGE the meaning of the sentence? *
1 point
a. wary
b. cautious
c. unaware
d. skeptical
The nervous system is one system among several in the human body. In order to function, does the nervous
system depend on other systems such as the circulatory system or the digestive system? Conversely, do these
systems depend on the nervous system? Explain your reasoning for each answer.
Answer:
The nervous system does depend on other systems visa versa.
Explanation:
They depend on each other because the brain needs nutrients given from the system and also the systems need the sensors from the nervous system.
How does this person use energy to
ride the river's rapids?
Explanation:
Image? there is not image in there so I wouldn't be able to answer it properly...
Riding river rapids uses the kinetic energy of water to propel a kayak, while hydroelectric systems control and convert this energy into electricity.
How Energy is Used to Ride the River's Rapids:
When riding the river's rapids, a person uses kinetic energy inherent in the flowing water. The experience can be thrilling, as one navigates through the rushing white water in a kayak or other vessel. The power of a river's flow is a result of its ability to convert mechanical (potential) energy into thermal energy and hydroelectric power. In the case of rapids, the conversion of potential energy into kinetic energy creates the movement and force that propel the kayak downhill, offering the energy needed for the ride.
Similarly, hydroelectric systems like run-of-the-river projects harness the energy of a river in a more controlled manner. By directing water through a turbine—similar to how rapids propel a kayak—these systems convert the river's kinetic energy into mechanical energy, and subsequently into electricity with minimal energy lost as heat.
12. A substance through which a wave can travel is a?
Answer - A substance through which a wave can travel is a medium
Explanation:
A medium is the middle point between the crest and trough and it helps to Carry the wave or you can call it the disturbance of the wave . .
A substance through which a wave can travel is called a medium.
A medium acts as a conduit for the transfer of energy from one point to another by allowing the wave to propagate. Waves require a physical medium to transmit their energy because they rely on the interaction and displacement of particles within the medium.
When a wave passes through a medium, it causes the particles of the medium to vibrate or oscillate in a specific pattern. These vibrations transfer energy from one particle to the next, enabling the wave to travel. The type of medium determines the properties of the wave, such as its speed, direction, and behavior.
Electromagnetic waves, such as light and radio waves, can propagate through a vacuum because they consist of oscillating electric and magnetic fields rather than relying on particles for transmission. These waves can travel through space, allowing us to observe distant stars and communicate wirelessly.
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if the pH of a solution decrease's, is the solution getting more acidic or lees acidic
Answer:
The solution becomes more acidic.
Explanation:
As the pH of a solution decreases, the concentration of hydrogen ions [H+] increases. Acidic solutions have a higher concentration of hydrogen ions and a lower pH.
I hope this helped. :)
The sprinter ran 110 m in 11 seconds. What was her average speed in m/s?
Answer:
10 m/s
Explanation:
110/11=10
Answer:
10 m/s
Explanation:
110/11= 10 m/s
Explain why no work has been done after Ethan pushes against a brick wall for 5 minutes that did not move.
A. The wall does not contain inertia.
B. Three or more people are needed in order for work to be done.
C. Two or more people are needed in order for work to be done.
D. In order for work to be done, the wall needs to move.
Answer:
D
Explanation:
I believe the answer is D, but I am not an expert.
Final answer:
No work has been done when Ethan pushes against a stationary wall because, in physics, work requires displacement (transfer of energy), which does not occur here. Therefore option D. In order for work to be done, the wall needs to move is the correct answer.
Explanation:
When Ethan pushes against a brick wall for 5 minutes and the wall does not move, no work has been done despite the feeling of effort. This is because, in physics, the concept of work requires that there be displacement of the object in the direction of the applied force. Since no displacement occurs in this scenario, there is no transfer of energy to the wall, and therefore, no work is performed according to the formula W = Fd (where W is work, F is the force applied, and d is the displacement). The correct answer to why no work has been done is D. In order for work to be done, the wall needs to move. It is crucial to note that this technical definition of work may differ from the everyday usage of the term, which often includes any exertion of effort.
Which best describes the wavelength of a simple wave?
A.The distance from the crest of a wave to the crest of the
next wave
B.The distance from the crest of a wave to the trough of the
next wave
C.The number of waves that pass a certain point in a minute
D.The speed at which the wave travels in m/s
Answer:
I think it is A
Explanation: Wavelength is the distance from one crest to another, or from one trough to another, of a wave (which may be an electromagnetic wave, a sound wave, or any other wave). Crest is the highest point of the wave whereas the trough is the lowest.
A series circuit has a current of 5 A. The circuit contains 10ohms resistor. What is the voltage of the circuit
Answer:
50 Volts
Explanation:
Using Ohm's Law
V= I x R
V= 5 x 10
V = 50 V
What areas in the United States are most like the grasslands of Kenya?
In United states, the grasslands are seen in the great plains, prairies, and in the intermountain west regions. They are mostly seen in Oklahoma, Kansas, Nebraska, South Dakota etc.
What are the main area of grass lands in united states ?The grasslands of Kenya are part of the East African savanna, which is characterized by warm temperatures, seasonal rainfall, and a mix of grasses and scattered trees. In the United States, similar grasslands are found in several regions, including:
The Great Plains: This region covers much of the central and western United States, and includes states such as Texas, Oklahoma, Kansas, Nebraska, South Dakota, and North Dakota. The Great Plains are characterized by a mix of grasses and scattered trees, and experience seasonal variations in rainfall.
The prairies: These are grasslands found in the central and western parts of the United States, including states such as Iowa, Illinois, Minnesota, Missouri, and Wisconsin. Like the Great Plains, the prairies are characterized by a mix of grasses and scattered trees.
The Intermountain West: This region covers parts of the western United States, including states such as Colorado, Wyoming, Montana, and Idaho. The Intermountain West is characterized by high-elevation grasslands and scrublands, which are adapted to the region's arid climate and rocky soils.
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The Great Plains in the United States are most similar to the grasslands of Kenya, as both are characterized as temperate grasslands dominated by grasses.
The areas in the United States that are most like the grasslands of Kenya, particularly the savannas of the Taita Hills Wildlife Sanctuary, are the Great Plains. The Great Plains region stretches across the central part of the US and is characterized by vast grasslands. This similarity is due to both regions being temperate grasslands, where the dominant vegetation is grasses and rainfall is moderate, creating an environment that does not support dense forests but does support a rich variety of grasses and herbaceous plants. The climate and ecology of the Great Plains share similarities with the Kenyan savannas, though there are also distinct differences in terms of specific flora and fauna due to geographical separation and varying climate conditions.
Mark needs to lower the pitch of the guitar to play his songs. How can Mark lower the pitch of the guitar?
A
Mark can make the strings tighter so they vibrate faster.
B
Mark can make the strings looser so they vibrate faster.
C
Mark can make the strings tighter so they vibrate slower.
D
Mark can make the strings looser so they vibrate slower.
Suppose that you are riding a bicycle. You exert an effort force of 697 N downward as you push on the pedals. The resulting load force that causes the bicycle to move forward is 93 N. What is the mechanical advantage of the bicycle? (Round to the tenths place)
The mechanical advantage of the bicycle is 0.1.
Explanation:
A simple machine is a machine that produces the output if we give the required input, and so the output always depends on the input force. Sometimes machines can also reduce the input force to get the required output and the ratio of output to input force is called as the mechanical advantage.
MA = [tex]$\frac{F_{o} }{F_{i} }[/tex]
Now we have the input force = 697 N
Output force = 93 N
So Mechanical advantage can be calculated by inserting those values as, MA = [tex]$\frac{93}{697}\\[/tex]
= 0.1
So the mechanical advantage of the bicycle is 0.1.
The mechanical advantage (MA) of the bicycle is calculated by dividing the load force by the effort force, resulting in an MA of 0.1 when rounded to the tenths place.
Explanation:To calculate the bicycle's mechanical advantage (MA), we use the ratio of the load force to the effort force. The formula for mechanical advantage is:
MA = Load Force / Effort Force
Given that the effort force exerted is 697 N, and the load force is 93 N, we plug these values into the formula:
MA = 93 N / 697 N
Calculating this gives us the mechanical advantage of the bicycle, which is:
MA = 0.1334
Rounded to the tenths place:
MA = 0.1
The green bars are called "error bars." They indicate the range of uncertainty that scientists have about the data on the graph. (Note: Not all error bars are shown.)
Why do you think these error bars are smaller near the year 2000 than in the 1890s?
This graph shows data up to about 2010. So it couldn't have been drawn before 2010. OF COURSE the data from only 10 years earlier was more reliable than the data that was 120 years old ! It wasn't even measured the same way back then as it is now.
Error bars are used to show the error in a reported measurement. The reason why the error bars are smaller near the year 2000 than in the 1890s because the ways of measuring have changed majorly over the past 100 years. The ways of measuring 100 years ago were probably not as accurate as the ways of measuring today.
Best of Luck!