Answer:
c. 0.71 [s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f} =v_{o} -g*t[/tex]
where:
Vf = final velocity = 0 (because when the ball reaches the top, there is no movement)
Vo = initial velocity = 7 [m/s]
g = gravity acceleration = 9.81 [m/s²]
t = time [s]
Note: The negative sign of the equation means that the movement is againts the direction of the gravity acceleration.
[tex]0 = 7 - (9.81*t)\\t = 0.713 [s][/tex]
What is a free electron? Can someone help?
Which of the following statements best describes the corn plants below?
Answer:
The Bt gene is inserted into one plant cell by using a bacterial plasmid.
Explanation:
A car traveling at 60 km/h (16.7 m/s) strikes a tree. The
front end of the car compresses a distance of 0.30 m
before coming to a complete stop. The driver's airbag
deploys allowing the driver to come to a stop in 1.5 m.
What was the average acceleration of the driver during
the collision?
Answer:
2.5 m/s
Explanation:
A car travels west for 200000 m in 12600 s what’s its velocity
Answer:
Velocity = 15.87m/s
Explanation:
Given the following data;
Distance, d = 200000m
Time, t = 12600secs
*To find the velocity*
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;
[tex]Velocity = \frac{distance}{time}[/tex]
Substituting into the equation, we have;
[tex]V = \frac{200000}{12600}[/tex]
Velocity = 15.87m/s
Therefore, the velocity of the car is 15.87 meters per seconds due west.
Nikolas had an idea that he could use the compressed carbon dioxide in a fire extinguisher to propel him on his skateboard.
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.2 m/s2? Round your answer to the nearest whole newton.
60 N
Which of Newton’s laws did Nikolas have to use to calculate this force?
Answer:
I'm terrible at explaining so here's a screenshot, please do not listen to the other answer, it is wrong.
- Ripper
Explanation:
Answer:
C is the correct answer !!!
Explanation:
hi everyone im learning about zodiac signs can u plz share urs and somethings u like to for ex im an aquarius and i sing and like to play vollyball im an independent person·ω· tysm!!
Answer: Aquarius!!!!
Explanation:
Answer:
Lucky for you, I am a expert on zodiac signs! Not bragging bc I don't know capricorns. Sooooo, your a aquarius. Very nice, a air sign who like to make friends. The least popular of the air signs. I am a libra, the 2nd most popular of the air signs. Gemini is the most. Ask me what you want to know about on zodiac signs. i will answer.
Wait why can't I comment
Explanation:
compare and contrast the strength of the forces between two objects with a mass of 1kg each, a charge if 1 C, and at a distance of 1m from each other.
Answer:
force and mass sorry i dont clear
Explanation:
If the amount of work done was 6 joules on an object and the object was moved 30m,
IN
how much force was required?
Answer:
180
Explanation:
Work done= Force x distance
So rearrange the formula to find the force
Force= Work done/distance
Force= 6/30
Force= 1/5 N or 0.2 N
Pls I need help ASAP
Answer:
i dont undertsnad what do u ned hep wit?
Explanation:
Math Practice: Cart A loaded with blocks (600g) moving left at 0.7m/s hits stationary cart B (200g).
After the collision, both carts move left, Cart A at speed 0.27m/s.
What is the velocity of cart B after the collision? Show your work.
Answer:
The velocity of cart B after the collision is 1.29 m/s.
Explanation:
We can find the velocity of cart B by conservation of linear momentum:
[tex] p_{i} = p_{f} [/tex]
[tex] m_{A}v_{A_{i}} + m_{B}v_{B_{i}} = m_{A}v_{A_{f}} + m_{B}v_{B_{f}} [/tex]
Where:
[tex]m_{A}[/tex] is the mass of cart A = 600 g = 0.6 kg
[tex]m_{B}[/tex] is the mass of cart B = 200 g = 0.2 kg
[tex]v_{A_{i}}[/tex] is the inital velocity of cart A = 0.7 m/s
[tex]v_{A_{f}}[/tex] is the final velocity of cart A = 0.27 m/s
[tex]v_{B_{i}}[/tex] is the initial velocity of cart B = 0
[tex]v_{B_{f}}[/tex] is the final velocity of cart B =?
Taking the left direction as the positive horizontal direction:
[tex] 0.6 kg*0.7 m/s + 0 = 0.6 kg*0.27 m/s + 0.2 kg*v_{B_{f}} [/tex]
[tex] v_{B_{f}} = 1.29 m/s [/tex]
Therefore, the velocity of cart B after the collision is 1.29 m/s.
I hope it helps you!
Emily rides on a horizontal rotating platform of radius r at an amusement park
and moves at a linear velocity, vt = 1 m/s, one third the way from the center to the
outer edge, and a rotational velocity of 2 RPM. How much would her linear and
rotational velocities be if she moves to the outer edge?
Answer:
Her linear velocity on the outer edge is 3 m/s
Her rotational velocity, is constant at 2 RPM
Explanation:
The given parameters are;
The radius of the rotating platform = r
The linear velocity v(t) = 1 m/s
The position Emily is riding = 1/3 the distance from the center
The rotational velocity = 2 RPM = 2 Revolutions per minute
The formula for angular velocity, ω is given as follows;
ω = θ/t
Where;
θ = The angle rotated
t = The time taken for the rotation
Given that the rotational velocity = 2 RPM
1 revolution = 2·π radians
The angular velocity, ω = 2×π×(2 RPM) = 4·π rad/min = 4·π/60 rad/seconds
ω = 4·π/60 rad/seconds
The linear velocity, v = r₁×θ/t = r₁×ω
Where;
r₁ = 1/3 × r
v = 1 m/s = 1/3 × r × 4·π/60 rad/seconds
∴ r = 1/(1/3 × 4·π/60) = 45/π meters
r = 45/π meters
Therefore her linear velocity, v₂ and her rotational velocity if she moves to the outer edge will be given as follows;
v₂ = r × ω = 45/π × 4·π/60 = 3 m/s
Her linear velocity on the outer edge, v₂ = 3 m/s
Her rotational velocity, remains at 2 RPM.
1.
A student pushes against a wall with 20 N of force and the wall does not move. In this situation, the
wall exerts -
A.
A.20 N of force in the same direction as the push.
B.20 N of force in the opposite direction of the push.
C.less than 20 N of force.
D.more than 20 N of force.
Answer:
B
Explanation:
This is a balanced force. In a balanced force, nothing happens.
In the human circulatory system, arteries carry blood away from the heart to different parts of the body. Veins carry blood from different parts of the body back to the heart. A scientist claims that the greater the amount of exercise a person performs, the greater the amount of oxygen (O2) the body uses. He records the oxygen concentration in the blood of people while they are riding an exercise bike. The graphs show the results of this investigation.
a. Identify at least two systems within the human body that work together during exercise.
b. Explain how the evidence from the data in the graphs supports or does not support the scientist’s claim.
Answer:
There are many different systems involved in when we exercise, the three main ones are the Respiratory system which is involved in breathing the circulatory system which is about circulation of blood around the body and finally the muscular system and finally the Muscular system which is about how we move.
Explanation:
If the data consistently do not support the hypothesis, then CLEARLY, the hypothesis is NOT a reasonable explanation of what you are investigating. The hypothesis is rejected, and we search for a new interpretation, an new hypothesis that supports the experimental data
Respiratory and circulatory systems are the two systems within the human body that work together during exercise.
How does the respiratory and circulatory systems work together during exercise?The respiratory system:
allows the exchange of gases intake of oxygen and exhalation of carbon-dioxide.oxygenation of blood at the lungs.The circulatory system:
transports deoxygenated blood to the lungs for oxygenation.delivers oxygenated blood to the appropriate tissue.Hence, during exercise more oxygen is used by the body.The claim by scientist is true?During exercise:
breathing rate increases from about 15 times per minute to roughly 40–60 times per minute.heart rate also rises, providing more oxygen to reach your muscles and allowing them to continue moving.To learn more about respiratory system, circulatory system, blood, exercise, and oxygen here,
https://brainly.com/question/13128077
#SPJ2
A car accelerates from 0 m/s to 20 m/s in 5 seconds,
what is the acceleration of the car in m/s2?
Answer:
4
Explanation:
20-0=20 m/s
20/5=4 m/s2
6. What is the potential energy of your 3 kg puppy that is sitting in the grass in your backyard?
Answer:
The answer is 0 J
Explanation:
Mass=3
Acceleration= 9.8
Height=0
The eqation is [tex]3(9.8)(0)[/tex] or [tex]3*9.8*0[/tex]
and if you do the math it adds up to 0 J
The potential energy of your 3 kg puppy that is sitting in the grass in your backyard would be 0 Joules .
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy .
ME = PE + KE
As for the given problem, we have to find out what the potential energy of your 3 kg puppy that is sitting in the grass in your backyard,
The potential energy of the puppy = m × g × h
= 3 × 9.8 × 0
= 0
Thus , the potential energy of your 3 kg puppy that is sitting in the grass in your backyard would be 0 Joules .
To learn more about mechanical energy here, refer to the link given below :
brainly.com/question/12319302
#SPJ2
what do you mean by 1 watt
Velocity is nothing more than speed
with direction.
True
false
Answer:
False
Explanation:
velocity is more important than speed
Velocity is defined as the speed with direction.
This statement is true.
Velocity is different from speed look below at the differences.
Differences between speed and velocity:Speed is defined as the ratio between distance over time while velocity is given as the ratio of displacement i.e. speed with direction over time.
Example: Velocity is the rate of motion, speed, or action. An example of velocity is a car driving at 75 miles per hour in the north direction.
Thus, the given statement is true.
Find more information about Velocity here:
brainly.com/question/4931057
4. How many neutrons are there in an atom of protium? Deuterium? Tritium?
P
A black stone was discovered to have magnetic properties.
a) What was this stone first called?
b) What is its modern mineral name?
Answer:
a) this stone was first called Schorl stone
b)the first modern name for this mineral was Black tourmaline
Explanation:
hope this helps you!
:)
Please help ASAP !!!!
A high-speed train in Japan travels a distance of 300. kilometers in 3.60 x 103 seconds. What is the average speed of this train? (Turn the time into hours by using a unit conversion)
Answer:
The average speed is 83.3 m/s
Explanation:
CUAL DE LAS SIGUIENTES LEYES NO PERTENECEN A LOS 3 PRINCIPIOS DE NEWTON? 1.LEY DE LA ATRACCION 2.LEY FUNDAMENTAL DE LA DINAMICA 3.LEY DE ACCION Y REACCION 4.LEY DE LA INERCIA
Answer:
La Ley de atracción no pertenece a los tres principios de Newton.
Explanation:
Las leyes de Newton son tres principios que sirven para describir el movimiento de los cuerpos, basados en un sistema de referencias inerciales (es aquél que está en reposo o se mueve con velocidad constante, es decir, no tiene aceleración).
Las 3 leyes de Newton son:
Primera Ley o Ley de Inercia : Esta ley enuncia que todo cuerpo permanece en su estado de reposo o de movimiento rectilíneo uniforme a menos que otros cuerpos actúen sobre él. Explica que para modificar el estado de movimiento de un cuerpo es necesario actuar sobre él. Segunda ley o Principio Fundamental de la Dinámica : Esta ley dice que la fuerza que actúa sobre un cuerpo es directamente proporcional a su aceleración. Es decir, si sobre un cuerpo actúa una fuerza, dicho cuerpo modificará su velocidad, es decir, adquirirá una aceleración. Dicha fuerza y su aceleración generada son proporcionales y están relacionadas mediante: F=m*a donde F es la fuerza aplicada, m es la masa del cuerpo sobre el que se aplica la fuerza y a es la aceleración adquirida por dicho cuerpo.Tercera ley o Principio de acción-reacción : Esta ley expresa que cuando un cuerpo ejerce una fuerza sobre otro, éste ejerce sobre el primero una fuerza igual y de sentido opuesto.Entonces, la Ley de atracción no pertenece a los tres principios de Newton.
A B-52 bomber jet flies at a horizontal velocity of 286.2 m/s and at an altitude of 7500 m above the ground. How far away horizontally should a payload be dropped to land on a target?
Answer:
11196.14 m
Explanation:
From the question given above, the following data were obtained:
Horizontal velocity (u) = 286.2 m/s
Height (h) = 7500 m
Horizontal distance (s) =?
Next, we shall determine the time taken for the payload to get to the target. This can be obtained as follow:
Height (h) = 7500 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
7500 = ½ × 9.8 × t²
7500 = 4.9 × t²
Divide both side by 4.9
t² = 7500 / 4.9
Take the square root of both side
t = √(7500 / 4.9)
t = 39.12 s
Finally, we shall determine the horizontal distance as follow:
Horizontal velocity (u) = 286.2 m/s
Time (t) = 39.12 s
Horizontal distance (s) =.?
s = ut
s = 286.2 × 39.12
s = 11196.14 m
Thus the payload will travel 11196.14 m horizontally in order to hit the target
Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 3.04 m away from a waterfall 0.585 m in height, at what minimum speed must a salmon jumping at an angle of 41.7 ◦ leave the water to continue upstream? The acceleration due to gravity is 9.81 m/s 2 . Answer in units of m/s.
Answer:
V₀ = 5.47 m/s
Explanation:
The jumping motion of the Salmon can be modelled as the projectile motion. So, we use the formula for the range of projectile motion here:
R = V₀² Sin 2θ/g
where,
R = Range of Projectile = 3.04 m
θ = Launch Angle = 41.7°
V₀ = Minimum Launch Speed = ?
g = 9.81 m/s²
Therefore,
3.04 m = V₀² [Sin2(41.7°)]/(9.81 m/s²)
V₀² = 3.04 m/(0.10126 s²/m)
V₀ = √30.02 m²/s²
V₀ = 5.47 m/s
3N 8N net force???
PLEASE HELP !!!
Answer:
First tell what are the directions and what we've to do?? add subtract or multiply??
20. Show that an acceleration of 0.67 m/s/s is the result if a force of 1000N is exerted on a 1500 kg
car.
Explanation:
Given parameters:
Mass of the car = 1500kg
Force applied = 1000N
Acceleration = 0.67m/s²
Unknown:
Proof that the acceleration will result from the applied force on the car
Solution:
According to newton's second law of motion,
Force = mass x acceleration
So;
Acceleration = [tex]\frac{Force }{mass}[/tex]
Now insert the parameters and solve;
Acceleration = [tex]\frac{1000}{1500}[/tex] = 0.67m/s²
We have shown that the acceleration is 0.67m/s²
PLSSSSSSS HELP!!!!!! ASAP!!!! WILL MARK BRAINLIEST!!!!!!!!
Answer: 3 V of alternating current
Explanation:got that right
How much time will it take for a truck to travel 20 meters if it is traveling at 4 m/s?
Answer:
The answer is 5 sExplanation:
The time taken can be found by using the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{20}{4} \\ [/tex]
We have the final answer as
5 sHope this helps you
Explain how bar graphs can show comparisons between 2 topics.
Answer:
A bar chart is typically used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.
Explanation:
A bar chart also known as a bar graph can be defined as the graphical representation of data (informations) by using vertical columns or rectangular bars. When a data set is observed, a bar chart can be used to graphically represent or record the total or overall amount of information contained therein. Generally, bar charts are used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.
The bar graph has a x-axis and a y-axis used to represent the various categories of data collected.
In this scenario, the x-axis is used to denote the points earned by the teams while the y-axis is used to denote the seasons as seen in the image attached.
Hence, point scores by team (Team A, B and C) per seasons (2002, 2003, 2004 and 2005) can best be compared through the use of a bar chart (graph).
Answer:
Answer above is correct i only put this:
Explanation:
A bar chart is typically used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.
Sharon pours salt into a glass of water. The salt dissolves. The substance in the glass is a_________
study island
Answer:
Issa Mixture.
A salt is a compound. ... Na exists in sodium compounds and Cl as Cl2 or chlorinated compounds. A common example would be table salt where both exist( Sodium Chloride). Sodium Chloride solution consisting of NaCl and water is a mixture. An example would be sea water which consists of several salts. Ur welcome.
Explanation: and
The salt is the solute; water is the solvent. Mixed together they become a solution.