Answer:
1.11 s.
Explanation:
From the question given above, the following data were obtained:
Height (H) = 6 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =.?
The time taken for the branch to hit the ground can be obtained as follow:
H = ½gt²
6 = ½ × 9.8 × t²
6 = 4.9 × t²
Divide both side by 4.9
t² = 6/4.9
Take the square root of both side
t = √(6/4.9)
t = 1.11 s
Therefore, it will take 1.11 s for the branch to hit the ground.
Which pair of quantities represent scalar quantities, and how are they different from vector quantities?
A. energy and velocity
B. displacement and velocity
C. displacement and time
D. distance and time
D.
They don't have directions.
The quantities with only magnitude and no direction are called scalar quantities. Therefore, option D is the correct answer.
Scalar quantities have only magnitude but vector quantities have both magnitude and direction. Some examples of scalar quantities are,
• Mass
• Temperature
• Speed
• Density
Thus, we conclude that the quantities with only magnitude and no direction are scalar quantities. Hence option D is the correct pair.
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Which of these objects could be falling with constant acceleration?
Answer:
1 and 2
Explanation:
If an object has constant acceleration, it's displacement at time t is:
Δx = v₀ t + ½ at²
For object 1:
0.44 = (0) (0.3) + ½ a (0.3)²
a = 9.78
3.14 = (0) (0.8) + ½ a (0.8)²
a = 9.81
So object 1's acceleration is approximately constant.
For object 2:
0.06 = (0) (0.3) + ½ a (0.3)²
a = 1.33
3.09 = (0) (2.1) + ½ a (2.1)²
a = 1.40
So object 2's acceleration is approximately constant.
For object 3:
0.44 = (0) (0.3) + ½ a (0.3)²
a = 9.78
3.09 = (0) (2.1) + ½ a (2.1)²
a = 1.40
So object 3's acceleration is not constant.
In a science demonstration, a teacher mixed zinc (Zn) with hydrogen chloride (HCl) in a flask and quickly attached a balloon over the mouth of the flask. Bubbles formed in the solution and the balloon inflated.
What most likely occurred during this demonstration?
:The Zn and HCl both retained their identity.
:Either Zn or HCl, but not both, retained its identity.
:Evaporation of one of the substances occurred.
:One or more new substances formed.
Answer:
d
Explanation:
When a teacher mixed zinc (Zn) with hydrogen chloride (HCl), one or more new substances formed. Hence, option (d) is correct.
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.
Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).
The study of chemical processes involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.
When the teacher mixed zinc (Zn) with hydrogen chloride (HCl), chemical reaction happens and more than one new substances formed.
2Zn + 2HCl → 2ZnCl + H₂
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What's the answer to this question?
Answer:
The barometer is supporting 75 cm of Hg due to atmospheric pressure.
Since the manometer is open to air pressure, the gas pressure is supporting the air pressure plus the 30 cm of Hg.
So the "absolute" gas pressure is 75 + 30 = 105 cm of Hg.
What does the acronym B.E.E.F. stand for?
Question 5 options:
box-out, elbows out, energize, follow-through
balance, engage, eyes, field goal
block, engage, eyes, free-throw
balance, eyes, elbow in, follow-through
The defense is the team that has possession of the basketball, and is trying to score points.
Question 6 options:
True
False
Question 7 (5 points)
The bounciness of a basketball is most important for which action?
Question 7 options:
Shooting
Passing
Dribbling
Stealing
Question 8 (5 points)
What can you infer about why certain shots are worth three points, and others are only worth two?
Question 8 options:
Three-point shots are taken from longer distances, so they're harder to make
Three-point shots reward players for not committing fouls when they shoot
Three-point shots require shooters to battle through more defensive pressure than two-point shots
Three-point shots can only be taken by guards, while two-point shots can be taken by any player
Question 9 (5 points)
How are free throws different from ordinary shots?
Question 9 options:
They only occur late in games
They're taken by defensive players, not offensive players
They cannot be rebounded
They're each worth one point instead of two or three
Question 10 (5 points)
A player with the basketball has to dribble the ball to be able to move around.
Question 10 options:
True
False
Question 11 (5 points)
All shots in basketball are worth two points.
Question 11 options:
True
False
Question 12 (5 points)
Which skill is least useful on defense?
Question 12 options:
Speed
Strength
Passing Ability
Jumping Ability
Question 13 (5 points)
Who is the inventor of basketball?
Question 13 options:
James Naismith
John Bradshaw
Jerry West
Joe Namath
Question 14 (5 points)
What conclusion can be drawn from the fact that many of the best international players want to play in the NBA?
Question 14 options:
It's easier to join NBA teams than teams in other countries
Many of these players have never been to the United States
Basketball isn't very popular outside the United States
The NBA is the most competitive league in the world
Question 15 (5 points)
Which action is taken only by teams on offense?
Question 15 options:
Rebounding
Blocking
Stealing
Shooting
Question 16 (5 points)
A free-throw is a one point shot from the foul line.
Question 16 options:
True
False
Question 17 (5 points)
Finger-pads, waist level, and eyes up are cues for what skill?
Question 17 options:
Shooting
Stealing
Dribbling
Passing
Question 18 (5 points)
A person should step toward their target when passing the basketball.
Question 18 options:
True
False
Question 19 (5 points)
Any illegal physical contact to a basketball player is a foul.
Question 19 options:
True
False
Question 20 (5 points)
It is important to keep the _________ in when shooting the basketball.
Question 20 options:
Ankle
Foot
Knee
Elbow
Answer:
balance, eyes, elbow in, follow-through
Explanation:
6.P.2.1 Matter: Properties and Changes Notes
The Theory ______
of Conservation
of
states:______
cannot be
or!____________
height
is anything that has
(weight) and height
(takes up space).
A
is the
in an object.
is the
an object takes
to add speaker notes
Answer:
The __law__ conservation
of state that either energy may produced nor destroyed
The idea that people behave in odd ways on a full moon is an example of a limitation of science. a characteristic of science. pseudoscience. scientific knowledge.
Answer:
Pseudoscience
Explanation:
Because its is based on beliefs with a explanation
Answer:
The answer to your question is B.pseudoscience
Explanation:
Pseudoscience means a collection of beliefs or practices mistakenly regarded as being based on scientific method.
I also did the test and got a 100 % on it.
PLZ MARK BRAINLIEST
Multiple Choice
Which of the following was not required by the Massachusetts Education Law of 1642?
O
Children were to be educated in basic religious principles and the laws of the commonwealth.
O Children were to be able to read and write.
O Children of servants were included in the law as recipients of said education.
Children were to be sent to designated schoolmasters for their learning.
Answer:
What was not required by the Massachusetts Education law of 1642 is;
Children were to be sent to designated schoolmaster for their learning
Explanation:
The Law of 1642 required that parents and master see to it that their children knew the principles of religion and the capital laws of the commonwealth.
The important aspects of the 1642 Law includes;
1) The responsibility for the basic education and literacy of a child are those of the parents and masters of child apprentices
2) Reading and writing competency of all children and servants are a requirement
3) It is the duty of the government, where a parent or master are unable to meet their tutoring responsibility, to see that a child is placed where the basic educational requirement will be met.
The role of a schoolmaster or the setting of a formal school were yet to be formed as at that time.
Answer:
The correct answer is Children were to be sent to designated schoolmasters for their learning
The responsibility of educating children was on parents and apprenticeship masters, not on designated teachers or schoolmasters. However, the law did allow the government to step in if the supervising adults failed in their responsibilities.
Explanation:
differences between a pair of scissors and nailcutter
Answer:
Different classes of levers
Explanation:
The main difference between a pair of scissors and nailcutters is that they are different classes of levers. Scissors are made from two class 1 levers, meaning that the effort is exerted at one end and the load at the other with the fulcrum in the middle. This is because we press one end together (the handles) so we are applying the effort, and the other side closes from the fulcrum in the middle.
Nailcutters on the other hand, consist of two class 2 levers. This means that the fulcrum is on the opposite end to the effort with the load in the middle. This is because we press down on one side and the two parts move closer together.
Hope this helped!
What indicates that an atom
has no overall charge?
convert 288cm to Meters
Give explanation + formula
Answer:
288 cm is 2.88 meters. This is because each centimeter is 1/100th of a meter, or in other words, each meter is 100 cm. To find out cm-m, divide the amount of cm by 100 and change the unit to m.
Explanation:
formula is cm/100=m
288/100= 2.88m
describe how changing the particles changed the atom
Answer: During chemical changes particles do change with atoms or ions regrouping . Bonds (links) between atoms break and new ones form and energy is either given out or taken in.
Explanation:
Chemical reactions make particles to change and resulting to change atoms or ions via regrouping .
What is chemical reaction?The chemical reaction is the reaction between two reactants that led to the formation of products.
The products are substances that forms after reaction. The reactants are the substances which are original materials.
Bonds between atoms break and make new ones. In this process, energy is either rejected or taken in.
The particle are the electrons which are shared between the atoms of same or different elements.
The electrons in the valence get donated or accepted by the atoms and form bond. When the electrons are donated, the bonds break and when electrons are accepted, bonds are formed. So, the new element or compound is formed.
Thus, the chemical reaction are responsible for change in atoms due to change in particles.
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explain at least two differences between justice system laws and scientific laws.
Starting from rest, a truck accelerated at a rate of 2 m/s to the right for 25 seconds. How far will the truck travel during this time period
Answer:
S= ?
V=2m/sec
t=25s
S=V*t
S=2*25
S=50m
The acceleration due to gravity on the Moon is gM. Suppose an astronaut on the Moon drops an object from a height of H. The time it would take the object to reach the Moon’s surface would be TM. The same object is dropped from the same height on Earth, where the acceleration due to gravity is gE. The time it takes the object to reach the Earth’s surface is TE. Which of the following is a correct mathematical relationship for the two times?
TE=gEgM−−−√TM
TE=gEgMTM
A
TE=gMgE−−−√TM
TE=gMgETM
B
TE=gEgMTM
TE=gEgMTM
C
TE=gMgETM
TE=gMgETM
D
TE=TM
The relationship between the two times is [tex]TE = TM\sqrt{\frac{gM}{gE} }[/tex]
The given parameters:
the acceleration due to gravity on the Moon = gM
height from which the object was dropped on moon, = H
time taken for the object to reach the moon surface, = TM
height from which the object was dropped on Earth, = H
the acceleration due to gravity on the Earth = gE
time taken for the object to reach the Earth's surface = TE
To find:
The relationship between the two times:Apply the following kinematic equation:
[tex]H = ut + \frac{1}{2} gt^2\\\\we \ know \ nothing \ about \ the \ initial \ velocity \ u , let \ u = 0\\\\H = \frac{1}{2} gt^2\\\\[/tex]
Height equation for the object on the moon:
[tex]H = \frac{(gM) TM^2}{2}[/tex]
Height equation for the object on the Earth:
[tex]H = \frac{(gE) TE^2}{2}[/tex]
Since the two heights are equal, set the two equation to be equal to each other to determine the relationship between the two times:
[tex]\frac{(gE)TE^2}{2} = \frac{(gM)TM^2}{2} \\\\(gE)TE^2 = (gM)TM^2\\\\make \ TE \ the \ subject \ of \ the \ formula;\\\\ TE^2 = \frac{(gM)TM^2}{gE} \\\\TE= \sqrt{\frac{(gM)TM^2}{gE} } \\\\TE = TM\sqrt{\frac{gM}{gE} }[/tex]
Thus, the relationship between the two times is [tex]TE = TM\sqrt{\frac{gM}{gE} }[/tex]
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An airplane is seller rates down a runway at 3.10 M/S squared 441.5 seconds from rest until finally left off the ground ,what is the displacement before takeoff
Answer:
302129m
Explanation:
Using s= ut + 1/2at²
But u= 0
So
S= 1/2(3.1)(441.5)²
=302129m
What is the average speed of a motorcycle that goes 90 meters in 5 seconds?
Answer:18 m/s
Explanation:
Take=speed=distance /time
Why does a green leaf look green in our eyes
Answer:
because the leaf absorbs all the other colors except for green. So the leaf reflects the green color which is what we see. that is why a leaf spears to be green.
Explanation:
floor gang aooh sub to pewdiepie
Please Help! Im dumb.
Two completely different compounds may contain identical elements.
True or False
When velocity is positive and acceleration is negative, what happens to the object’s motion?
a The object speeds up.
b The object remains at rest.
c Nothing happens to the object.
d The object slows down.
Answer:
Option (D) : The object slows down.
whats the average velocity
Answer:
A velocity is a vector unit, and average velocity can be described as the displacement divided by the time. The units for velocity can be understood from the definition to be meters/second or in common any distance unit over any time unit. The average speed of a body is described as the distance covered divided by the time elapsed.
Explanation:
the force of speed
Answer:
10 m/s
Explanation:
The average velocity is the slope of the graph.
m = (10 - 0)/(1 - 0)
m = 10/1
m = 10 m/s
- The school zone in front of your school has a posted speed limit of 25 mi/h, which is about 11 m/s. Let's
examine the stopping of a car in several different situations.
a. The crossing guard holds up her stop sign, and the driver is paying attention well. The car moves at a
constant velocity of 11 m/s for 2.3 seconds while the driver reacts, then slows down at a constant rate
of -4.5 m/s2. What is the stopping distance for the car in this situation?
Answer:
s = 38.7 m
Explanation:
First we calculate the distance covered during uniform motion of reaction time.
s₁ = vt
where,
s₁ = distance covered during uniform motion = ?
v = uniform speed = 11 m/s
t = time = 2.3 s
Therefore,
s₁ = (11 m/s)(2.3 s)
s₁ = 25.3 m
Now, we calculate the distance covered during decelerated motion:
2as₂ = Vf² - Vi²
where,
a = deceleration = -4.5 m/s²
s₂ = distance covered during decelerated motion = ?
Vf = Final Velocity = 0 m/s
Vi = Initial Velocity = 11 m/s
Therefore,
2(-4.5 m/s²)s₂ = (0 m/s)² - (11 m/s)²
s₂ = (-121 m²/s²)/(-9 m/s²)
s₂ = 13.4 m
the total distance will be:
s = s₁ + s₂
s = 25.3 m + 13.4 m
s = 38.7 m
How can the force of friction between two surfaces be reduced?
a. By changing rolling friction to sliding friction.
b. By making smooth surfaces rougher.
c. By separating surfaces with a lubricant.
d By increasing the force between the surfaces.
If size of an image is 10 cm and the magnification produced by a mirror is +1, what will be the size of object?
Answer:
h = 10 cm
Explanation:
The magnification produced by a mirror is given by :
[tex]m=\dfrac{h'}{h}[/tex]
h' is the image size and h is the object size
We have, h = 10 cm, m = +1
So,
[tex]m=\dfrac{h'}{h}\\\\h=\dfrac{10}{1}\\\\h=10\ cm[/tex]
So, the size off the object is same as that of the size of the image i.e. 10 cm.
A Force of 20N displaces a body about 45m how much work is done?
Answer:
159 ofc
Explanation:
Position vs Time
20
15
10
B
5
C
position (m)
0
D
-5
-10
-15
E
20
0 1 2 3
8
9
10
11
12
4 5 6 7
time (sec)
401320
Answer:
20
15
10
B
5
C
position (m)
0
D
-5
-10
-15
E
20
0 1 2 3
8
9
10
11
12
4 5 6 7
time (sec)
Explanation:
okk
PLEASE HELP ASAP!!!!
T1 = 2×W / squrt (3) +1
T2 = squrt(6) ×W/ squrt (3) +1
Here, T1 is along A.
T2 is along B
W = 250N.
Yo can directly use above formula to find solution.
a 50-kg object moving at 12 m / s has a momentum of 600 kg m / s what is the mass of an object moving at 4 m/s has the same momentum
Explanation:
p=mv
600kgms-1=m × 4ms-1
m=600kgms-1/4ms-1
m=150kg
The mass of the object which has momentum of 600kgm/s with the velocity of 4m/s is 150kg.
What is Momentum?Momentum is the product of the mass and velocity of the object. Momentum is the quantity of motion which is made up of the amount of matter moved and the velocity at which it moves. Momentum is a vector quantity because it has both the magnitude and direction. The SI unit of momentum is kg.m/s (kilogram meter per second).
p = m × v
p = momentum of the object,
m = mass of the object,
v = velocity of the object
600kgm/s = m × 4m/s
m = 600/ 4
m = 150kg
Therefore, the mass of the object will be 150kg.
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A train travelled 500 meters in 25 seconds
[tex]\huge\mathfrak\red {Answer:}[/tex]
Speed = Distance/TimeIf a train travelled 500 meters in 25 seconds then,
Speed = 500m/25sec
→ 20 m/sec[tex]\mathfrak\purple {Hope\: this\: helps\: you...}[/tex]
speed=500m/25sec
20m/sec
A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.
A - what is the zero error of the micrometer?
B - what is the correct diameter wire?
A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.
What is micrometer?The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.
In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.
Therefore, A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.
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