Answer:
convection
Explanation:
How much work is done when a girl applies a force of 80 N to move an object 4 m, and then moves the object 1 m back?
Answer:
[tex]w = \underline{{ \boxed{400 \: J }}} [/tex]
Explanation:
[tex]work \: done = \boxed{force \times distance} \\ w = 80 \times (4 + 1) = 80 \times 5 \\ w = \underline{{ \boxed{400 \: J }}} [/tex]
IF a car trip 400 km in four hours what is the rate of speed that a car is traveling?
pls help i will give u brianliest!
Answer:
Explanation:
neautrons and protons
Si se hace avanzar un carro de 200 kg de masa desde el reposo aplicando una fuerza de 800 N. Calcular a) Su aceleración. b) La velocidad final del carro.
Explicación:
a) Según la segunda ley de movimiento de Newton;
Fuerza = Masa * aceleración
Dado
Masa del coche = 200 kg
Fuerza aplicada = 800N
aceleración = Fuerza / Masa
aceleración = 800/200
aceleración = 4m / s²
b) Para que obtengamos la velocidad final del automóvil, necesitaremos el tiempo.
Suponiendo que el tiempo necesario es de 2 segundos
Sabemos que aceleración = velocidad / tiempo
velocidad = aceleración * tiempo
velocidad = 4 * 2
velocidad = 8 m / s
Por lo tanto, la velocidad final será de 8 m / s si el tiempo es de 2 s.
5 points
At 55 minutes how fast is the object moving?*
velocity
B01
B
60
40
А
20
me
min
D
20
40
10
20
30
50
55 m/s
60 m/s
20 m/s
0 m/s
Answer:
9 answer hai brown
HELP!! Explain why a more streamlined car generally will have a better fuel economy than a bulkier car with the same mass.
Answer: A streamlined car will be more aerodynamic causing it be more fuel efficient.
Explanation: Aerodynamic-of or having a shape which reduces the drag from air moving past. A bulkier car will be less aerodynamic meaning that the air that hits it won't go around but push it back causing it to use more power which causes it to use more fuel. A streamlined car will allow air to flow around and over the car, a streamlined car will usually be less like a box and have more curves.
An elevator weighs 8,000 N of force. What is the mass of the elevator
Answer:
Mass, m = 816.33kg
Explanation:
Weight can be defined as the force acting on a body or an object as a result of gravity.
Mathematically, [tex] Weight, W = mg[/tex]
Where;
m is the mass of an object. g is acceleration due to gravity.Making mass, m the subject of formula, we have;
[tex] Mass, m = \frac {W}{g} [/tex]
Given the following data;
Weight = 8000N
We know acceleration due to gravity is equal to 9.8 m/s²
Substituting into the equation, we have;
[tex] Mass, m = \frac {8000}{9.8} [/tex]
Mass, m = 816.33kg
Therefore, the mass of the elevator is 816.33kg.
How does acceleration measure. A.change in speed over time
B. Change in displacement overtime
C. Change in distance over time
D. Change in velocity over time
Answer:
D
Explanation:
Acceleration is the rate of change in velocity experienced by an object, measured in meter per second.
Answer:
Change in velocity
Explanation:
a-pe-x
The density of an object has the equation d = m/v. if an object has a mass of
2.5 g and a volume of 1.3 cm3, what is its density?
Answer:
The answer is 1.92 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{2.5}{1.3} \\ = 1.923...[/tex]
We have the final answer as
1.92 g/cm³Hope this helps you
__________ ___________ are movements you do to loosen up your joints.
A .Dynamic Stretches
B. Static Stretches
Answer:
Dynamic stretches
Explanation:
Dynamic stretches are active movements where joints and muscles go through a full range of motion. When you do dynamic stretches you do not hold the stretch, instead you stretch with movement.
A go-kart and rider have a mass of 14 kg. If the cart accelerates at 6 m/s² during a 40 m sprint in 100 seconds, how much power did the cart do?
Answer:
P=33.6 \ W
Explanation:
Mechanical Work and Power
Work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.
Being [tex]\vec F[/tex] the force vector and [tex]\vec s[/tex] the displacement vector, the work is calculated as:
[tex]W=\vec F\cdot \vec s[/tex]
If both the force and displacement are parallel, then we can use the equivalent scalar formula:
[tex]W=F.s[/tex]
Mechanical Power is the amount of energy transferred or converted per unit of time. The SI unit of power is the watt, equal to one joule per second.
The power can be calculated as:
[tex]\displaystyle P=\frac {W}{t}[/tex]
Where W is the work and t is the time.
If an object of mass m has an acceleration a, the net force is:
F=m.a
The go-kart and rider have a mass of m=14 kg and accelerate at [tex]6 m/s^2[/tex], thus the net force applied is:
[tex]F=14\cdot 6 = 84\ N[/tex]
The work done by the cart when traveling d= 40 m is:
[tex]W=84\cdot 40[/tex]
[tex]W=3,360\ J[/tex]
Finally, the power for t= 100 seconds is:
[tex]\displaystyle P=\frac {3,360}{100}[/tex]
P=33.6 \ W
A 7.0 kg cannonball flying rightward at 12 hits a stationary rock. The cannonball keeps moving in the same
S
m
m
direction at 2.0 after the collision but sends the rock flying at 14 towards right
S
S
What is the mass of the rock?
Answer:
5.0 kg
Explanation:
use the equation; (m1v1i) + (m2v2i) = (m1v1f) + (m2v2f)
I need the answer ASAP!
How does the Newton’s Law relate to the force of gravity
Answer:
Newton's second law of motion states that the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. If the only force acting on an object is due to gravity, the object is in free fall.
Explanation:
Hope this helps :)
the value of g is greater at the poles than at the equator why
Answer:
because the gravitational pull is maximum at the poles and decreases as it comes down toward the equator.
16.
The parents in Jana's neighborhood rely on her to baby-sit for them. Jana loves little children
and is very good with them. She enjoys her babysitting business on some week nights and
many weekends. She has dance class 4 times a week. Therefore, Jana has difficulty finding
time to do her homework What area is she weak in?
Answer:
doing her homework/finding time to do important things
One of the largest pipe organs is in the aŭditorium organ in the Fox Theatre. The pipe is 32
ft. long and produces a sound with a wavelength of about 8.8m. If the speed of sound in air is 346
m/s what is the frequency of this sound? What is the period? Show all work and explain your
answer. (12 pts.)
Answer:
Explanation:
Wave Period and Frequency In this video Paul Andersen explains how the period is the time between wave and the frequency is the number of ... Your browser does not currently recognize any of the video formats available. ... Show less Show more ... Waves: Light, Sound, and the nature of Reality.
The diagram below shows the velocity vectors for two cars that are moving relative to each other.
From the frame of reference of car 1, what is the velocity of car 2?
Answer:
The answer is "[tex]5 \ \frac{m}{s} \ west[/tex]"
Explanation:
[tex]\to \vec{V_1} = (25 \frac{m}{s}) (\hat{-i})\\\\\to \vec{V_2} = (20 \frac{m}{s}) (\hat{-i})\\\\[/tex]
velocity of car | respect to car :
[tex]\to \vec{V_{12}} = \vec{V_1} - \vec{V_2}\\\\[/tex]
[tex]=\vec{-25} \hat{i}+ \vec{20} \hat{i}\\\\= 5 \ \frac{m}{s} \ west[/tex]
Answer:
70 m/s east
Explanation:
What best describes the volcanic process of magma with dissolved water vapor and other gases as it nears the Earth surface?
Pressure on the molten rock lessens and the gases quickly dissipate into the atmosphere.
Explosive gases such as methane and ethane combine with oxygen and ignite violently in the atmosphere.
Pressure on the molten rock lessens the rock rapidly expands to the point that it explodes and ejects into the atmosphere.
Pressure on the molten rock lessens and the gases dissolved in rock can bubble and expand rapidly causing violent eruptions.
Answer:
Pressure on the molten rock lessens and the gases dissolved in rock can bubble and expand rapidly causing violent eruptions.
Explanation:
that's just how it works lol. hope this helps :]
Answer:D
Explanation: got it right on mine
NEED HELP TODAY
Which of the following is true about the speed of light?
A. It depends on the wavelength
B. In a vaccum, it is a constant value that does not depend on the observer
C. It is the slowest in a vacuum unless the observer is moving towards the source
D. In a vacuum, it varies depending on the color of the light
Answer:
I am pretty sure it is B My friend hope you are well
Explanation:
Answer:
B- It is a constant when the light is traveling in a vacuum.
Explanation:
"Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles)
an airplane flies 1,592 miles east from arizona to georgia in 3.68 hours. what is the average velocity of the airplane
Answer: Around 433 miles
Explanation:
engineers are using computer models to study train collisions design safer train cars. They start by modeling an elastic collision between two train cars traveling toward each other. Car one is traveling south at 18 M/S and has a full load, giving it a total mass of 14,650 kg. Kartoo is traveling north at 11 m/s and has a mass of 3825 kg. After the collision car one has a final velocity of 6 M/S south what is the final velocity of car 2?
Answer:
The final velocity of the second car is 57 m/s south.
Explanation:
This is an elastic collision between two train cars. In this case, the total kinetic energy between the two bodies will remain the same.
The formula to apply is :
[tex]m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f[/tex]
where ;
[tex]m_1=mass of object 1\\v_1i=initial velocity object1\\m_2=mass of object2\\v_2i=initial velocity object 2\\v_1f=final velocity object 1\\v_2f=final velocity object 2[/tex]
Given in the question that;
[tex]m_1=14650kg\\v_1i=18m/s\\m_2=3825kg\\v_2i=11m/s\\v_1f=6m/s\\v_2f=?[/tex]
Apply the formula as;
[tex]m_1v_1i +m_2v_2i=m_1v_1f+m_2v_2f[/tex]
{14650*18}+{3825*11} = {14650 *6} + {3825 * v₂f}
263700+42075=87900 + 3825v₂f
305775 =87900 + 3825v₂f
305775-87900 = 3825v₂f
217875=3825v₂f
217875/3825 =v₂f
56.96 = v₂f
57 m/s = v₂f { nearest whole number}
Answer:
35 m/s south
Explanation:
took the test
A ball is thrown vertically upwards with a velocity of 9.8 m/s. Its velocity after 1 second will be
[ Take g = 9.8 ms¯²]
9.8 m/s
19.6 m/s
Zero
2.45 m/s
[tex] \LARGE{ \underline{\underline{ \purple{ \bf{Required \: answer:}}}}}[/tex]
GiveN:
Initial velocity = 9.8 m/s²Accleration due to gravity = -9.8 m/s²Time taken = 1 sTo FinD:
Final velocity of the ball?Step-by-step Explanation:
Using the first Equation of motion,
⇒ v = u + gt
⇒ v = 9.8 + -9.8(1)
⇒ v = 0 m/s
The final velocity is hence 0 m/s.
Note:While solving questions of under gravity motions using equations of motion, remember the sign convection to avoid mistakes.You can consider positive above the ground and negative for towards it.A crane lifts a 75kg mass a height of 8 m. Calculate the gravitational potential energy gained by the mass (g = 9.8 N/kg.
What are some signals of autism?
Answer:
The range and severity of symptoms can vary widely. Common symptoms include difficulty with communication, difficulty with social interactions, obsessive interests, and repetitive behaviors.
At any age
1. Loss of previously acquired speech, babbling or social skills.
2. Avoidance of eye contact.
3. Persistent preference for solitude.
4. Difficulty understanding other people's feelings.
5. Delayed language development.
6. Persistent repetition of words or phrases (echolalia)
7. Resistance to minor changes in routine or surroundings.
Have a nice day ✨Gamma rays are given out from the
of radioactive atoms. What one word completes the sentence??
Gamma rays are given out by the nucleus of certain radioactive materials. Radioactive material ray causes harm to the human beings and environment.
What is gamma-decay?Gamma decay is the production of extremely high-frequency electromagnetic radiation in order to stabilize the unstable nucleus. You must be well-versed in the various energy levels found in an atom.
The Nucleus has its own amount of energy. Gamma decay is the nucleus' method of transitioning from a higher energy level to a lower energy level by emitting high energy photons.
Gamma rays are given out by the nucleus of certain radioactive materials.
Hence, nucleus is the right answer for the blank.
To learn more about the gamma decay, refer to the link;
https://brainly.com/question/25455333
#SPJ2
what is a car's acceleration between 25 s and 30 s?
Why are black holes so deeply part of the collective imagination (books, movies, songs, video games, comics, paintings, etc)?
Answer:
Black holes are some of the strangest and most fascinating objects in outer space. They're extremely dense, with such strong gravitational attraction that even light cannot escape their grasp if it comes near enough. so when in books, movies, songs, video games, comics, paintings, etc you can imagine the impossible. as in escaping a black hole
Explanation:
Particles in a substance move __ when more thermal energy is transferred to that object.
that object.
A faster
B slower
why is friction possible to slip on the wet floor
Answer:
why is friction possible to slip on the wet floor
Explanation:
This is because the coefficient of friction μ and the therefore resultant force of limiting friction Fs is significantly reduced when a lubricant is introduced between the the two kinetic or static surfaces.
Answer:
Pls mark me brainliest. the ans
Explanation:
Wet floors have less friction so there is a lesser chance of slipping. This is because the coefficient of friction μ and the therefore resultant force of limiting friction Fs is significantly reduced when a lubricant is introduced between the the two kinetic or static surfaces.
Why might measuring changes in speed or direction be important?
