Explanation:
if question specifies g=10ms^-2 then use that or else use g =9.81
Mass of wooden box= 20/9.81 = 2.0387359.... kg
F=ma
a=F/m
a=8/2.0387
a=3.92 ms^-2 (3 s f)
Which of the following are examples of projectile motion?
check all that apply
A. a basketball being shot toward the basket
B. a bowling ball rolling down the lane
C. a dog running along a sidewalk
D. a baseball hit for a home run
Answer: A. a basketball being shot toward the basket
Explanation: The definition of projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. So, the basketball is the object being thrown and the person throwing the ball is aiming it to go into the basket making that the path of trajectory. Hope that makes sense and helps!
1. According to Newton's Third Law of motion, what are the two forces that interact called?
Answer:
action and reaction forces
Explanation:
These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.
The term for a geographic locations regit above sea level is
Answer:
level HAHAHAHAHAH chariss
A gun with a muzzle velocity of 65.2 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange in meters will the bullet be 2.7 seconds later
Answer:
s ≈ 35.8 m
Explanation:
Let's apply the uniform acceleration equation to find the vertical height travelled after 2.7 seconds.
[tex]s = ut + \frac{1}{2}at^2[/tex]
s = distance travelled
u = initial vertical velocity
t = time taken
a = gravitational acceleration
The gun is fired horizontally, hence there is no initial vertical velocity.
[tex]s = 0(2.7) + \frac{1}{2}(9.81)(2.7)^2[/tex]
[tex]s = 35.75745 m[/tex]
s ≈ 35.8 m
How many elements does glucose contain
Answer:
three
Explanation:
It just is
Answer:
6 i think
Explanation:
Enlarged brain ventricles are presumed to signify __________. A. An excess of dopamine activity B. Frontal lobe abnormalities C. Development of brain tissue D. A deterioration of brain tissue.
Answer:
Enlarged brain ventricles are presumed to signify
____a deterioration of brain tissue____.
Explanation:
got it right
Enlarged brain ventricles are presumed to signify a deterioration of brain tissue. The correct option is D.
What is the deterioration of brain tissue?One or more of the ventricles swell as CSF builds up when an injury or sickness disrupts CSF circulation. Because the adult skull is stiff and cannot expand, the pressure inside the brain may significantly rise.
A chronic illness known as hydrocephalus causes fluid to accumulate in the ventricles deep inside the brain. It normally cannot be cured, but it can be controlled.
As a neurodegenerative disease that causes cognitive impairment and behavioral abnormalities, Alzheimer's disease is a progressive illness that impairs memory and other critical mental functions.
Therefore, the correct option is D. A deterioration of brain tissue.
To learn more about the deterioration of the brain, refer to the link:
https://brainly.com/question/28163622
#SPJ2
In your own words explain how "Carrying Capacity" plays a vital role in today's world and our future as well
Answer:??????
Explanation:
A student throws a ball up straight up. What happens to the ball's energy as it rises?
Answer:
B. The kinetic energy of the ball change into potential energy as the ball rises.
Explanation:
This can seem a little bit confusing at first, but once you understand Kinetic Energy, you'll get it right away. Kinetic Energy is energy an object has when it is moving. So for example, you have kinetic energy when you run, a pen has kinetic energy when you drop it in class, and the ball has kinetic energy as it rises.
However, because of outside forces, objects with kinetic energy will eventually lose it. These forces can be anything from friction as an object slides across a surface, to the negative acceleration due to gravity.
In this question, the force working against the motion of the ball is gravity. As you know, when you throw something up, it has to come down, because of gravity. As the ball goes up, it has enough kinetic energy that it continues its upward motion, however it slowly looses that energy, causing it to slow to a stop before falling back to the ground.
On the way up, the energy of the ball changes from this kinetic (moving energy) to what we call potential energy. Potential energy is exactly what is sounds like, it is the potential for something to begin moving. So, as the ball goes higher, it has a lower chance of continuing to go up (meaning it's loosing it's kinetic energy) and higher chance of falling back down (meaning it's gaining potential energy).
Hope this helps.
Can someone please explain quantum physics to me?
Answer:
Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.
Answer:
qorks with atomic booms and nuclearbombs on how atoms react when charged
differentiate gravitational force and acceleration due to gravity
Answer:
I hope this answer is correct
Explanation:
Difference Between Gravitation and Gravity
Gravitation is referred to the force acting between two bodies which can be represented as the F=(GM1M2)/R2 which means gravitation force is proportional to the product of the masses of the object 1 and object 2 and is inversely proportional to the square of the distance between them. The gravitational force between earth and any object is known as gravity.
Difference Between Gravitation and Gravity
Gravitation Gravity
It is a universal force It is not a universal force
It is a weak force It is a strong force
The force is F=(GM1M2)/R2 (G= gravitational constant) The force is F=mg (g=acceleration due to gravity)
The direction of gravitational force lies in the radial direction from the masses The direction of the force of gravity is along the line joining the earth’s center and the center of the body. Its direction is towards the center of the earth.
The force can be 0 when the separation between bodies is infinity The force of gravity can be 0 at the center of the earth
It requires two masses It requires only one mass
These were some difference between Gravitation and Gravity. If you wish to find out more, download BYJU’S The Learning App.
RELATED ARTICLES:
Gravity Acceleration Due to Gravity
Need the correct answer ASAP
Will give the brainliest !!
#1
Voltage remains constant whole way in circuit so it's voltage#2
Same 9V at all three resistors.
#3
Let's take a look at ohms law
[tex]\\ \rm\Rrightarrow \dfrac{V}{I}=R[/tex]
I is current[tex]\\ \rm\Rrightarrow I\propto \dfrac{1}{R}[/tex]
So if one resistor is taken out resistance becomes less so flow of current becomes moreQuestion 2
Volcanic activity during Earth’s formation is responsible for contributing a significant portion of CO2 and H2O to the atmosphere. Explain how volcanoes can change the temperature and composition of the Earth’s atmosphere over time. Refer to your experimental data or graph as evidence.
Answer:
can make for colder winters by keeping the sun out more
Explanation:
1.Most of the particles spewed from volcanoes cool the planet by shading incoming solar radiation
2.lower temperatures in the troposphere & change atmospheric circulation patterns
scieducaredu earthdatanasagov
The process of transfer of charges from a charged object to the earth is called
(a) earthing
(b) lightning
(c) oscillation motion
(d) electron movement
Answer:
Earthing
Explanation:
Could use a lil help still due by 11:00pm!!
A series and a parallel circuit each have two resistors of 2 Ohms each. A third resistor of 2 Ohms is added to each of these circuits. The overall resistance of the ____________ circuit ____________.
A.
Parallel, increases
B.
Parallel, decreases
C.
Series, increases
D.
B and C only
Answer:
D, parallel decreases and series increases.
Explanation:
what is a multiple motion ? give example
Answer:when a body possesses more than one simple motion, it is called a multiple motion.
Explanation:you are traveling by a train. Your wrist watch is also sharing the linear motion of the train. But the hands of the watch are also undergoing rotational motion. Thus they have 2 kinds of motion, I, e, Multiple motion.so also the blades of the fan in the train have multiple motion (a linear motion of the train and the rotation).
PLASE HELP, DUE IN 10 min
7. The ___ is the basic unit of structure of
all living things.
cells are the basic unit of all living things
Answer:
Cell
Explanation:
Because I took this class last year and also learned it in biology
A Plane crashes into the side of a mountain. If the crash took place over 9
minutes and the planes velocity before the crash was 2000 yards per
second, what is the acceleration of the plane? *
Given parameters:
Duration of crash = 9min
Velocity before crash = 2000 yards per second
Unknown:
Acceleration of the plane = ?
Solution:
Acceleration is the change of velocity with time.
Acceleration = [tex]\frac{V - U}{t}[/tex]
where v is the final velocity
u is the initial velocity
t is the time taken
We need to convert the time into seconds from min;
60s = 1 min
So, 9min = 60 x 9 = 540s
So input the parameters and solve;
Acceleration = [tex]\frac{2000 - 0 }{540}[/tex] = 3.7yards/s²
The acceleration of the plane is 3.7yards/s²
how can an electrical current produce a magnetic field?
Answer:
by charging the coil
Explanation:
do you know how a magnet grabs another magnetic material and move it closer, an electric current passes through the coil making it act like a magnet by charging the coil called electromagnetism
Relative density has no unit .why ?
Answer:
Relative density is a ratio of the density of a certain material to the density of a reference material. Relative density has no unit, because the units of the material in question cancel out with the units of the reference material. For example, say a cooking oil’s density is 0.9 g/cm^3.
Explanation:
Which of the following accounting principles prescribes that a company record its expenses incurred to generate the revenue reported?.
Answer:
Matching principle
Explanation:
Matching principle is an accounting principle for recording revenues and expenses. It requires that a business records expenses alongside revenues earned.
Which expression represents this?List the number of atoms for each element in CO2:
Carbon:
Oxygen:
Answer:Carbon
Explanation:
Carbon is CO2
What circumstances must be in place for there to be a lunar eclipse?.
Answer:
When the Sun, the Earth, and the Moon are all aligned in space, a lunar eclipse occurs. The Moon reflects the Sun's light onto the Earth. The Earth gets in the way of the Sun in this case, keeping sunlight from reaching the moon. A lunar eclipse happens if this alignment is ideal.
Explanation:
Rephrased it so u dont have to<3 Hope this helped!
I will give brainliest
Answer:
75n
Explanation:
i hope this helps
How did saturn gets its name?
Answer:
Like all of the planets, Saturn is named after a character in Roman mythology. Saturn is named after the god Saturnus, the god of agriculture and harvest. Saturn is equivalent to the ancient Greek god Kronos.
How long does it take for mercury to revolve around the sun.
Answer:
88 days
Explanation:
Mercury take 88 days to revolve around the sun.
A weight force of 10 N force acts on an object while the object moves 20m along horizontal ground. How much work is done by the weight force on the object? a) 0.5 J b) 2 J c) 10 J d) zero e) 200 J I already know it's not 200 J because I got the question wrong. Please show work!
Answer:
e) 200 J
Explanation:
Work done by a force on an object is the energy required for a force to move that object over a distance. It can be calculated using the formula:
W = F × d
Where; W = work done
F = force applied
d = distance
According to this question, F = 10N, d = 20m
W = 10 × 20
W = 200 J or N/m
Net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9. 8m/s^2 comes out to be:(a) 980N(b) 580N(c) 1380N(d) zero
Answer:
(d) zero
Explanation:
Net acceleration = (a - g)
a is downward so it is positive
F(net) = ma(net)
F = 100 x (9.8 - 9.8)
F = 0
The correct option is (d).
Question 7
1 pts
According to the modern model of an atom,
-the number of protons in the atoms of one type of element will vary.
-moving electrons form an electron cloud in an atom.
-electrons are located in the nucleus of an atom.
-neutrons have a positive charge.
Answer:
I Believe The Answer Is B
Explanation:
(PLEASE HELP ASAP)
In what ways can you determine the number of valence electrons in an atom
using the periodic table? (select all that apply)
The number of valence electrons equals the number in the ones place for groups 3-12
The number of valence electrons equals the number in the ones place for groups 1,2 and 13-18
The number of valence electrons equals the number in the tens place for groups 1,2and 13-18
The number of valence electrons equals the number in front of the "A" for groups 1A-80
Answer:
The valency of atoms can be determined by looking at the groups of the periodic table. Hope this helps!
Explanation: