Answer:
an equation is balanced when the same number of each element is represented on the reactant and product sides. equations must be balanced to accurately reflect the law of conservation of matter.
Question 2 of 10
A football is kicked with a velocity of 18 m/s at an angle of 20". What is the
ball's acceleration in the horizontal direction as it flies through the air?
O A. 16.9 m/s2
O B. 0 m/s2
O C. 9.8 m/s2
O D. 6.1 m/s2
Answer:
B
Explanation:
The question does not specify any outside forces that could slow down the ball horizontally. There fore the ball does not accelerate or decelerate horizontally. Therefore, a = 0m/s2
by how many times will the kinetic energy of a body increaseif its speed is tripled? show by calculation.
Answer:
9 times
Explanation:
Mass of a body remains constant.
Let the mass of a body be 'm'
Let the speed of the body be 'v'
Initial Kinetic Energy (K.E.) = [tex] \frac{1}{2} m {v}^{2} [/tex]
When speed is tripled , new speed = 3v
Mass of body = m (Mass is always constant)
Final Kinetic Energy (K.E.") =
[tex] \frac{1}{2} \times m \times {(3v)}^{2} [/tex]
[tex] = > \frac{1}{2} \times m \times 9v[/tex]
[tex] = > 9( \frac{1}{2} m {v}^{2} )[/tex]
But we already know that [tex]k.e. = \frac{1}{2} m {v}^{2} [/tex]
Hence
[tex] = > final \: k.e. = 9(initial \: k.e.)[/tex]
A Nerf gun is shot straight up from the ground with an initial velocity of 14.0 m/s. What is the total time the projectile is in the air?
PLEASE SHOW WORK WILL MARK BRAINLIEST
The projectile has a height h at time t given by
h = (14.0 m/s) t - 1/2 g t ²
where g = 9.80 m/s² is the magnitude of the acceleration due to gravity. Solve for t when h = 0 :
0 = (14.0 m/s) t - 1/2 g t ²
0 = 1/2 t (28.0 m/s - g t )
1/2 t = 0 or 28.0 m/s - g t = 0
The first equation says t = 0, which refers to the moment the gun is first fired, so we ignore that solution. We're left with
28.0 m/s - g t = 0
t = (28.0 m/s) / g
t = (28.0 m/s) / (9.80 m/s²)
t ≈ 2.86 s
What’s the answer????
PLEASE HELP!!!!!
When current flows through this wire, what forms around the wire?
A. Electromagnetism
B. An electric field
C. An attraction between charged particles
D. A magnetic field
ONLY REPLY IF YOU KNOW THE ANSWER TO IT
Answer:The answer is A
Explanation:
Answer:
A. Electromagnetism
Explanation:
Whenever current travels through a conductor (the wire) a magnetic field is generated. Due to being a wire, the current formed is electric, so this making it an electromagnetic field.
Help my cat is constipated what do I do
Answer:
Increase Water Consumption
Try a New Diet
Help Your Cat Maintain a Healthy Weight
Increase Exercise and Enrichment
Minimize Stress and Anxiety
Add More Litter Boxes
Try Fiber or Probiotics
Ask Your Vet About Over-the-Counter Laxatives
Explanation:
Hope this helps ;)
The _____ leads from the pharynx towards the lungs
What is the velocity of an object moving 10 m in 5 seconds to the right?
Explanation:
The velocity of an object can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time taken
From the question we have
[tex] v = \frac{10}{5} \\ [/tex]
We have the final answer as
2 m/sHope this helps you
Integrated Science- Study Guide: Water
Please help me out here, report cards due dec.18, and once I'm done with this study guide I have an EXAM and its 21 question so please answer each question correctly so my score won't be low thanks! And, also I really appreciate ya'll helping me in this app
Each question is 3 points so, I'll make this question worth...15 points Please answer each question correctly thank you!
Answer:
Not all the pictures are popping up. So I can't answer them all. :(
Explanation:
The fist one is B. And the second is D. That's all I can see. I hope this helps a little bit :(
The average kinetic energy of the particles in an object is
A. Temperature
B. Heat
C. Atoms
Answer:
A. temperature
Explanation:
The average kinetic energy of the particles in an object is temperature.
Chris threw a basketball a distance of 27.5 m to score and win his
high school basketball game. If the shot was made at a 50.0° angle
above the horizontal, what was the initial speed of the ball?
Answer:
v₀ = 16.55 m/s
Explanation:
This motion of the ball can be modeled as a projectile motion with following data:
R = Range of Projectile = 27.5 m
θ = Launch Angle = 50°
g = acceleration due to gravity = 9.81 m/s²
v₀ = Initial Speed of Ball = ?
Therefore, using formula for range of projectile, we have:
[tex]R = \frac{v_{0}^2\ Sin2\theta}{g}\\\\v_{0}^2 = \frac{Rg}{Sin2\theta}\\\\v_{0}^2 = \frac{(27.5\ m)(9.81\ m/s^2)}{Sin100^o}\\\\v_{0} = \sqrt{273.93\ m^2/s^2}[/tex]
v₀ = 16.55 m/s
The speed of sound in human tissue is about 1600 m/s. If an ultrasound pulse takes
1.5 x 10--s to travel through a tissue, what is the thickness of the tissue in mm?
Answer:
The thickness of the tissue is : 2.4 x 10⁷ mm
Explanation:
The general formula for speed is the distance travelled divided by the time taken.
In this case,
Speed = 1600 m/s ------speed of sound in human tissue
Time = 1.5 * 10 seconds -----time of taken for the ultrasound pulse to go through a certain thickness of a tissues
The thickness of the tissue here is the distance as per the speed formula, hence;
Tissue thickness = Speed of sound * time taken by ultrasound pulse
Tissue thickness= 1600 * 1.5*10 =24000 m
1 m= 1000 mm
24000m = 24000*1000 mm
= 2.4 x 10⁷ mm
An airplane is traveling at an altitude of 15,490 meters. A box of supplies is dropped from its cargo hold. What is the cargo's velocity when it hits the ground? (Show your work and do not forget units)
Answer :
556.59 m/s.
Explanation:
Given that,
An airplane is traveling at an altitude of 15,490 meters.
A box of supplies is dropped from its cargo hold. We need to find the velocity of cargo when it hits the ground.
The initial velocity of the box is 0 as it as at rest. Let v is the velocity of cargo when it hits the ground. We can find it using third equation of motion as follows :
[tex]v^2-u^2=2as[/tex]
Put u = 0 and a = g
[tex]v^2=2gs\\\\v=\sqrt{2gs} \\\\v=\sqrt{2\times 10\times 15490 } \\\\v=556.59\ m/s[/tex]
So, when it hits the ground its velocity is 556.59 m/s.
Levi decides to examine the effect of fertilizer on the growth of tomato plants. He chooses four plants for his experiment and applies varying amounts of fertilizer to three of them. He does not apply fertilizer to one plant.
Over a 15-day period, the plants receive fertilizer on Days 1, 4, 7, 10, and 13. Levi measures the height of all of his plants with a meter stick on days 3, 6, 9, 12, and 15. He also makes sure to hold all experimental factors constant except for the fertilizer.
Where should the independent and dependent variables of Levi's experiment be placed when graphed?
Select all that apply.
the amount of fertilizer; y-axis
plant height; y-axis
the amount of fertilizer; x-axis
plant height; x-axis
Explanation:
Over a 15-day period, the plants receive fertilizer on Days 1, 4, 7, 10, and 13.
Levi measures the height of all of his plants with a meter stick on days 3, 6, 9, 12, and 15.
Independent variable is the amount of fertilizers given to the plants. The height of the plant depends on the amount of the fertilizers. It is the dependent variable.
On x-axis : The amount of fertilizer
On y -axis : Plant height
Please help me out on this question pleasee:>>
Answer:
graph 1
Explanation:
When it comes to a graph showing "constant acceleration," the line should be straight and upward (positive acceleration) or straight and downward (negative acceleration). The variables for acceleration are time and velocity. The independent variable (time) should be placed on the x-axis while the dependent variable (velocity) should be placed on the y-axis. As time increases, the velocity increases the same way. It doesn't slow down or changes. This makes it constant. They are also directly proportional to each other. This is evident on the first graph.
Where on a roller coaster are there equal amounts of potential energy and kinetic energy?
Answer:
Picture?
Explanation:
The roller coaster will have equal kinetic and potential energy at any point starting from rest and reaching the minimum height.
The given problem is based on the concepts and fundamentals of kinetic energy and potential energy. The energy of an object by virtue of its position is known as kinetic energy. And the energy of object by virtue of its position is called potential energy.
In the given problem, the roller coaster will have highest potential energy at maximum height, but will have least kinetic energy there.Similarly, it will have maximum kinetic energy at the bottom of slide, but will have least potential energy there.So, at any point between starting from rest and reaching minimum height it will have both potential and kinetic energy in equal magnitude.Thus, we can conclude that the roller coaster will have equal kinetic and potential energy at any point starting from rest and reaching the minimum height.
Learn more about the kinetic and potential energy here:
https://brainly.com/question/17858145
Compare an Earth year to a cosmic year
Describe binary fission with amoeba.
What is the measure of the average kinetic energy of the particles in a material known as?
A. heat transfer B. radiation
C. temperature
D. thermal expansion
Answer:
The answer is temperature
Which of the following can happen to energy?
A. It can be converted to other forms, created, and destroyed.
B. It can be created.
C. It can be destroyed.
D. It can be converted to other forms.
PLEASE HURRY
Would you rather have no air conditioning or no heating? Explain your answer
You apply a 325 N force to a heavy crate with a rope that makes a 29.0° angle with the horizontal, if you pull the crate a distance of 5.37 m, how much work was done by you?
Answer:
W = 1526.43 J
Explanation:
Given that,
Force acting on a heavy crate, F = 325 N
The rope will make 29.0° angle with the horizontal
The distance covered by the crate, d = 5.37 m
We need to find the work done by the crate. The work done by an object is given by :
[tex]W=Fd\cos\theta\\\\=325 \times 5.37\times \cos29\\\\=1526.43\ J[/tex]
So, the required work done is 1526.43 J.
Select the correct answer.
These waves are traveling at the same speed. Which wave has the highest frequency?
A
B
C
D
Answer:
a is the correct choice
Explanation:
The wave has the highest frequency in option A.
What is frequency?The frequency of a wave is the number of cycles completed by the wave in a given period of time. Frequency is measured in Hertz (Hz).
How to calculate frequencyThe frequency of a wave is calculated as follows;
[tex]v = f \lambda\\\\f = \frac{v}{\lambda}[/tex]
where;
f is the frequencyv is the speed of the waveλ is the wavelengthFrom the given chart, in option A the wave completed more cycles in the given period of time.
Thus, the wave has the highest frequency in option A.
Learn more about frequency of waves here: https://brainly.com/question/19638389
During which phase of the moon does a lunar eclipse occur
Answer:
Full moon
Explanation:
WHo is Rick...from adult swim
Answer:
rick, also known by his fans as they benevolently call him as "Uncle Rick"
Explanation:
he is the one and only author of his trademark mythology
known best for his PJO, HBO and TOA series, uncle rick is one of the best things to ever happen to this planet
Billy is pulling his sister Joslyn in the sled. Based on your knowledge of F=ma, describe what would
happen to the motion of the sled if Joslyn's friend Lisa also wanted to ride.
Answer:
the motion of the sled decrease
Explanation:
the mass increase
The acceleration of the sled will is inversely proportional to the mass on it. Therefore, the motion of the sled would slow if Joslyn's friend Lisa also wanted to ride.
What is acceleration?Acceleration in mechanics can be described as the rate of change of velocity of an object with respect to time. The acceleration of an object is a vector quantities with magnitude and direction.
The S.I. unit for acceleration can be represented as m/s² the net balance of all external forces acting is equal to the magnitude of the net resulting force.
The force (F) acting on an object is equal to the product of the mass (m) of the object and acceleration (a) of an object.
F = ma
And, a = F/m
As shown in the above equation, the mass of the object is inversely proportional to the acceleration of the object, therefore, the acceleration of the sled decrease as the mass on it increases.
Learn more about acceleration, here:
brainly.com/question/3046924
#SPJ2
An airplane's speed increased from 100m/s to 160m/s, at the average rate of 15m/s^2. How long did it take for the plane to complete this increase in speed?
Answer:
4s
Explanation:
Using the formula of motion as follows:
V = u + at
Where;
V = final velocity (m/s)
U = initial velocity (m/s)
a = acceleration (m/s)
t = time (s)
Based on the provided information, v = 160m/s, u = 100m/s, a = 15m/s², t = ?
V = u + at
160 = 100 + 15t
160 - 100 = 15t
60 = 15t
t = 60/15
t = 4seconds.
Therefore, the time it takes for the plane to complete this increase in speed is 4s.
The pupil of your eye
increases and -decreases in síze -Allows light to enter the eye
-both are true
Answer:
What is the question?
Explanation:
If you tell me the question I can help.
Two 100 ohm resistors are connected in series and they are connected to seven 1.5V DC. What is the total current flowing in the circuit?
I = V/Rt = 1.5/(100+100) = 1.5/200 = 0.0075 A ....or 0.0075*1000 = 7.50 mA
I = V/Rt
= 1.5/(100+100) = 1.5/200
= 0.0075 A ....or 0.0075*1000 = 7.50 mA
What is Current?In a full electrical circuit, current is the rate at which electrons move past a certain point. Current = flow, at its most fundamental level.
The international unit for measuring current is an ampere (AM-pir), sometimes known as an amp. It describes how many electrons (sometimes referred to as "electrical charge") travel past a certain point in a circuit over a specified period of time.
In a circuit, a current of 1 ampere corresponds to the movement of 1 coulomb of electrons, or 6.24 billion (6.24 x 1018) electrons, through a single location in a second.
Therefore, I = 0.0075 A ....or 0.0075*1000 = 7.50 mA
To learn more about current, refer to the link:
https://brainly.com/question/2264542
#SPJ2
An object has a mass of 4kg and experiences a gravitational force of 40N. If the object experiences no other forces, what will its acceleration be?
What do you need to FIND?
Force Mass Or Acceleration
What do you KNOW? (For the KNOW step you will need to identify which variable is being described by each value in the problem.)
What is the ANSWER?
Answer:
Acceleration,10
Explanation:
First 4kg is your mass,
Second 40N is your force
,so you need your acceleration
The answer is 10 because
F=40N
M=4kg
A=10
You divide 40 out of 4 and you get 10
HOPE THIS HELPS:)
Pls mark brainly
