A 2.5 –g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree’s trunk. What force was exerted on the bullet in bringing it to rest?
Answer:
A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What is the initial kinetic energy of the bullet? 153.125 J Correct: Your answer is correct.Jan 8, 2020
Explanation:
Describe how sound at a concert is different from the front row and the back.
When a government pays ranchers to reduce the number of milk cows they have, it is known as a what ?
O Subsidy
O Tax Break
O Productivity Schedule
O Resource Cost
I say a subsidy because the government is controlling how many cows they have.
Answer:
Subsidy
Explanation:
When a government pays ranchers to reduce the number of milk cows they have, it is known as a subsidy.
Subsidy is an incentive given by a government in form of cash or raw materials in order to achieve a common goal.
It might be to increase production of certain commodities or phase out a particular product in the market.
The subsidy helps in paying part of the production costs
what are the rocky planets? theres more in the attachment
HELP ME PLS
Answer:
Explanation:
The rocky planets include Mercury, Venus, Earth, and Mars. they are made up of rocks and metals and have solid surfaces.They are the closest four planets to the Sun. The gas giants are Neptune, Uranus, Saturn, and Jupiter. they are further from the sun and are in the outer part of the solar system. I hope this helps!
Which is characteristic of uneven growth during late childhood?
a. fast growth of hands and feet
b. increase in hip width
c. widening of the shoulders
d. lengthening of the torso
Answer:
B
Explanation:
The others are natural growth developments
2. A sled with no initial velocity accelerates at a rate of 1.1 m/s down a hill. How
long does it take the sled to go 13 m to the bottom?
Answer:
Time, t = 4.862 seconds
Explanation:
Given the following data;
Initial velocity = 0
Acceleration = 1.1m/s²
Distance = 13m
To find the time, we would use the second equation of motion;
S = ut + ½at²
Substituting into the equation, we have;
13 = 0*t + ½*1.1*t²
13 = 0.55t²
t² = 13/0.55
t² = 23.64
Taking the square root of both sides, we have;
Time, t = 4.862 seconds
someone help me! you get 27 points if you get it right
Answer:
1. D
2. D
3. A
The reason why your body goes right and the car car goes left is because your body tries to stay where it was, which is on the right. Your upper body doesn't feel a force and because of that continues in the same direction. Your lower half is pulled out from under you by seat friction to the left, leaving you leaning to the right.
During the previous year, Zach's weather station measured 0.8 yards of rain. Express this amount in cm.
Answer:
73.152cm
Explanation:
We have been given:
0.8yards of rain
Problem, convert to cm = ?
Solution:
The problem deals with the conversion from one length dimension to another.
So:
1 yard = 91.44 cm
So 0.8 yards = 0.8 x 9.44 = 73.152cm
The solution to this problem is 73.152cm
what is the velocity at 11 seconds
Answer:
should be A
Explanation:
there isn't a 3, so it must be his deceleration, which would be 5-3=2
Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. This is evidence that A. someone gives the plants food every day. B. plants can use heat in the ground to make food. C. plants store food for later use. D. photosynthesis also takes place in plant roots.
Answer:
The answer is not B or D because they need light co2 and water to make their food so B and D are out. and unless someone is walking during winter to feed it. It will not be A so the answer is C.
Explanation:
Plants can use heat in the ground to make food in winters. Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die. Thus, the correct option is B.
What is Photosynthesis?Photosynthesis is the process through which plants use the sunlight, which is trapped in the chlorophyll pigment present in the chloroplast of cells to convert water, and carbon dioxide to produce oxygen gas and energy in the form of sugar (carbohydrate).
Photosynthesis is the process in which energy transformation takes place. In this process, light energy from the sun is converted into chemical energy that is in the form of carbohydrate in the leaves of the plant.
Therefore, the correct option is B.
Learn more about Photosynthesis here:
https://brainly.com/question/29764662
#SPJ2
the gravitational force produced between any two
objects kept at 2.5*10^km apart is 580N. at what distance
should they be kept so that the gravitational force becomes
half?
Answer:
The two objects should be kept at a distance of [tex]3.535\times 10^{4}[/tex] kilometers.
Explanation:
From Newton's Law of Gravitation, gravitational force ([tex]F[/tex]), measured in newtons, between two objects is inversely proportional to the square of distance ([tex]r[/tex]), measured in meters. That is:
[tex]F \propto \frac{1}{r^{2}}[/tex] (1)
[tex]F = \frac{k}{r^{2}}[/tex] (2)
Where [tex]k[/tex] is the proportionality ratio, measured in newtons-square meter.
Now we eliminate the proportionality by constructing the following relationship:
[tex]\frac{F_{2}}{F_{1}} = \left(\frac{r_{1}}{r_{2}}\right)^{2}[/tex] (3)
If we know that [tex]\frac{F_{2}}{F_{1}} = \frac{1}{2}[/tex] and [tex]r_{1} = 2.5\times 10^{7}\,m[/tex], then the distance between the two objects so that gravitational force becomes half is:
[tex]\frac{1}{2} = \frac{(2.5\times 10^{7}\,m)^{2}}{r_{2}^{2}}[/tex]
[tex]r_{2}^{2} = 1.25\times 10^{15}\,m^{2}[/tex]
[tex]r_{2} = 3.535\times 10^{7}\,m[/tex]
[tex]r_{2} = 3.535\times 10^{4}\,km[/tex]
The two objects should be kept at a distance of [tex]3.535\times 10^{4}[/tex] kilometers.
What are two main types of exercise???
Answer:
Endurance exercise and Strength exercise
Explanation:
Answer:
Aerob exercise and strength exercise
Explanation:
Explain how are position time, velocity, and acceleration related to each
other?
Plz help 200 pts
In the movie Black Panther, Wakanda's economy focuses on the production and use of a fictional metal known as vibranium, which has amazing chemical and physical properties. If this metal actually existed, where do you think the metal would be placed in the periodic table? What would be the elemental symbol?
Answer:
We just know that the metal is called Vibranium.
to place something is the table we need to know its atomic number and its mass. so if we can get that we can ans it.
Explanation:
A monkey increases its gravitational potential energy by climbing to the top of a tree. What happens to that potential energy if he climbs back down halfway?
Group of answer choices
It would decrease by three fourths.
It would double.
It would remain the same.
It would decrease by half.
Answer:
it would decrease by half.
Explanation:
Your attitude has no influence on how regularly you exercise.
Answer:
False
Explanation:
Answer: False
Explanation:
correct on edge✅
HELP PLEASE I NEED AN A FOR THIS TO PASS
Answer:
D: The velocity increases during the time periods labeled A and C
Explanation:
Since gravity pulls us down to Earth, it will pull down the ball faster when the ball is falling.
Billy is driving a bumper car for 5 minutes. In this time, Billy crashes into three other cars.
The first car is carrying another small child, the second is carrying a large adult, and the third is empty. Each car is sitting still when Billy hits it at full speed. Place the crashes in order of how much force Billy feels, from smallest to largest.
empty car
large adult
small child
<
Answer:Its empty car, small child, and then adult.
Explanation:
i took it
Answer:
Its empty car, small child, and then adult.
2. If a spring has a spring constant of 400 N/m, how much elastic potential
energy is stored when the spring is stretched by 0.25 m?
Answer:
The kinetic energy of a spring is equal to its elastic potential energy.
The elastic potential energy is 12.5N-m or 12.5 Joules.
Explanation:
[tex] = \frac{1}{2} k {x}^{2} \\ = \frac{1}{2} (400)( {.25)}^{2} \\ = 12.5[/tex]
what is an amplitude??
Answer:
maximum extent of a vibration or oscillation measured from the position of equilibrium.
Answer:
the maximum displacement or distance moved by a point on a vibratng body or wave measured from its equilibrium position. it is equal to one-half lenght of the vibration path.
Explanation:
hope it helps
What are the factors of works?
Answer:
Explanation:
The seven factors are work load, family life, transportation, compensation policy and benefits, colleagues and supervisor, working environment and working condition and career growth.
PLEASE SOMEONE HELP!!! ANSWER IF YOU KNOW PLEASE!!! LOTS OF POINTS!!!
Answer:
i think that magnet can cause kinetic because
it is made of iron or steel that attract other magnetic things
#CarryOnLearning
A 4 kg object is moving at a speed of 5 m/sec. How much kinetic energy does the object have? A. 10 joules B. 20 joules C. 50 joules D. 100 joules
Answer:
A. 10 joules
Explanation:
Given parameters:
Mass of object = 4kg
Speed = 5m/s
Unknown:
Kinetic energy of the the object = ?
Solution:
Kinetic energy is the energy due to a moving body.
So;
mathematically;
K.E = [tex]\frac{1}{2}[/tex] x m v²
m is the mass
v is the velocity
K.E = [tex]\frac{1}{2}[/tex] x 4 x 5 = 10J
The kinetic energy of the given moving object is 50 J. The Kinetic energy of an object is the energy due to its motion.
What is Kinetic energy?The Kinetic energy of an object is the energy due to its motion. It can be given as
[tex]KE = \dfrac 12 mv^2[/tex]
Where,
[tex]m[/tex] - mass = 4 kg
[tex]v[/tex] - velocity = 5 m/sec.
Put the values in the formula,
[tex]KE = \dfrac 12 4 \times 5^2\\\\KE = 50 \rm \ J[/tex]
Therefore, the kinetic energy of the given moving object is 50 J.
Learn more about kinetic energy:
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The total amount of carbon dioxide in the atmosphere is estimated to have decreased by 10 to 15 percent since 1900.
True False
Answer: False
Explanation:
What happens to objects in space when they no longer have force accelerating them?
Answer:An object thrown in space will move according to the forces on it in space. For instance, if you threw it in space near the Earth, it would accelerate due to the Earth's gravity. ... If there are no forces on the object, then it will move at a constant speed and direction.
Explanation:
Accounts for about 70% of the mass-energy content of the universe. It acts in opposition to gravity.
a
pressure eventually become, causing nuclear fusion
b
objects shift toward red on the spectrum & objects are moving away
c
Spiral galaxies appear to be a rotating disk of stars and dust
a dog running across the field at a speed of 1.2 m/s with a mass 3.2 kg
Explanation:
=0.5×3.2×1.44
=2.304J
I hope it's helpful!
Which electromagnetic waves have the shortest wavelength and the highest frequency?
waves
Answer: Gamma rays (violet) have the shortest wavelengths and the highest frequencies.
Explanation: The wavelength of the gamma rays is less than 0.01 nanometers. The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.
The electromagnetic waves have the shortest wavelength and the highest frequency is Gamma rays (violet).
What are gamma rays?Gamma radiation, from gamma rays (γ), is a type of electromagnetic radiation usually produced by radioactive elements. Gamma rays, due to their high energy, are able to penetrate matter more deeply than alpha or beta radiation.
Gamma ray is a type of high frequency electromagnetic radiation usually produced by radioactive elements.
See more about Gamma rays at brainly.com/question/23281551
Why are force fields necessary to describe electric force? 0 A. Electric force acts at a distance. O B. Electric force can only attract objects. C. Electric force is a form of gravity. D. Electric force attracts two poles.
Answer:
A. Electric force acts at a distance.
Explanation:
"Electric force," just like gravitational force is a "non-contact force." This means that even at a distance, two objects with no physical contact will create movement with the help of electric force. This leads to the concept of "force fields or field force" that explains why a charge object alters the region surrounding it. Once an object enters the region, it immediately experiences its force. An example of this is holding out one's hand near a "Van de Graaff generator." The electric force compels the hair strands to stand up.
please help!!! 50 POINTS
1) The diagram below models the energy involved in a reaction that changes methane gas and oxygen into carbon dioxide and water.
The graph shows a certain level of energy of reactants C H2 + 2 O2, which increases on the breaking of bonds as the atoms are separated. The energy is then consumed when the making of bonds decreases the energy of products, C O2 + 2 H2 O, to a level much lower than the energy of reactants. The energy change of negative delta H depicts the exothermic reaction.
Which observations about the energy released in making the bonds are correct?
a) It is greater than the energy absorbed in breaking the bonds. The excess is converted to chemical energy.
b) It is greater than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
c) It is less than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
d) It is less than the energy absorbed in breaking the bonds. The excess is converted to chemical energy.
2) Carbon dioxide is an example of a molecule where the component atoms of carbon and oxygen are held together by chemical bonds. Which statement correctly describes the reason for these chemical bonds?
a) The nuclei and electrons of the atoms are attracted to each other.
b) The strong nuclear energy bonds the atoms together.
c) The combination of chemical energy stored in each atom makes the bonds strong.
d) The structure of atoms increases their atomic energy, which creates the bonds.
3) When burning fuel for cooking, the pan and the food absorb energy and heat up. In this process, which form of energy is chemical energy converted into?(1 point)
a) thermal energy
b) atomic energy
c) mechanical energy
d) radiant energy
4) Which of the following statement/s about the energy involved in a chemical reaction is/are correct?
I. The energy stored in chemical bonds is kinetic energy.
II. The total energy is conserved during a chemical reaction.
III. Chemical energy can be converted to other forms of energy.
IV. Energy is needed to both break bonds and form new bonds.
a) III and IV only
b) II and III only
c) II, III, and IV only
d) I only
5) Burning coal results in several energy transformations to generate electricity. Which statement is correct about the chemical energy stored in chemical bonds between atoms when coal is burned?
a) It allows the bonds to form and then break.
b) It helps transform kinetic energy to potential energy.
c) It increases the number of atoms.
d) It converts to thermal energy.
thank you!!
Answer:
Explanation:
1. It is greater than the energy absorbed in breaking the bonds. The excess is converted to thermal energy.
2. The nuclei and electrons of the atoms are attracted to each other
3. thermal energy
4. II and III only
5. It converts to thermal energy.