Answer:
a= 1 m/s^2
Explanation:
Average acceleration can be found by dividing the change in velocity by the time.
a= ΔV/t
The change in velocity is the difference of the final velocity and initial velocity.
ΔV= final velocity - initial velocity
The final velocity is 30 m/s and the initial velocity is 25 m/s
ΔV= 30 m/s- 25 m/s
ΔV= 5 m/s
The time is 5 seconds.
Now we know the two values.
ΔV= 5 m/s
t= 5 s
Substitute the values into the formula.
a= 5 m/s / 5 s
Divide.
a= 1 m/s/s
a= 1 m/s^2
The average acceleration of the car is 1 meter per second squared.
state three ways of conserving energy
energy drinks
sitting
watching TV
Answer:
use natural lights
turn off electrical appliances..if not in use
check your wires every next Month
why has adolescence been characterized as a time of "storm and stress"?
Answer:
Its A time when our bodies hormones go crazy therefore making us insecure, sometimes scared, and other feelings. That’s why
Explanation:
at what angle work done is equal to zero
Answer:
work done=0 when angel between 2 objects is 90 degree
The force on the projectile is constant throughout the flight *
True
False
can somone pls help me??!! i’m very stuck
Answer:
graph b
Explanation:
graph a isnt constant
graph c is slower (less steep slope)
graph d is slowing down (starts high ends low)
Anybody know the acceleration of the box
It looks like the diagram is telling you that there is a net force of 8 N + 4 N = 12 N pointed to the right. By Newton's second law, the magnitude of the net force F is equal to the mass m times the acceleration a :
F = m a
12 N = (4 kg) a
a = (12 N) / (4 kg)
a = 3 m/s²
How to calculate mass
Answer:
The mass can be calculated by dividing the net force acting on an object by the acceleration of the object. When talking about net force, we use the units kilogram meter per second squared. This is also known as a Newton. The units for acceleration is meters per seconds squared, and the units for mass are kilograms.
Answer:
[tex]vd=m[/tex] - volume times density
Explanation:
d = density
v = volume
m = mass
density = mass divided by volume.
multiply both sides by volume to find mass.
A cross- country skier moves from location A to location B to location C to location D. Each leg of the back and forth motion takes 1 minute to complete; the total time is 3 minutes . Wes =0 min t - 2min t = 3mim t = 1min 100 What is the distance travelled by the skier in the first 3 minutes? What is the net displacement of the skier in the first 3 minutes? - What is the displacement during the second minute? What is the displacement during the third minute?
Answer:
hello some parts of your question is missing attached below is the missing part
Answer :
a) 360 m
b) 120 m ( eastward )
c) -120 m ( westward )
d) 80 m ( eastward )
Explanation:
given data:
Each leg time = 1 minute
Total time = 3 minutes
t=0 t= 2 t = 3 t = 1
xo =0 x2 = 40 x3 = 120 x1 = 160
a) Distance travelled by skier in first 3 minutes
d = | x1 - xo | + | x2 - x1 | + | x3 - x2 |
= 160 + 120 + 80 = 360 m
b) net displacement in first 3 minutes
s = ( x1 -x0 ) + ( x2 - x1 ) + ( x3 -x2 )
= 120 m ( eastward )
c) displacement during the second minute
s1 = x2 - x1 = 40 - 160 = -120 m ( westward )
d) displacement during the third minute
s2 = x3 - x2 = 120 - 40 = 80 m ( eastward )
(a) The distance traveled by the skier in the first 3 minutes is 360.
(b) The displacement of the skier during the second minute is 120 west.
(c) The displacement of the skier during the third minute is 80 east.
The given parameters;
distance traveled in 1 min = 160 distance traveled in 2 min = 20distance traveled in 3 min = 120The distance traveled by the skier in the first 3 minutes is calculated as follows;
[tex]x = (120 - 40) + 120 + 160\\\\x = 360[/tex]
The displacement of the skier during the second minute is calculated as follows;
[tex]x= (x_2 - x_1)\\\\x = 40 - 160\\\\x = -120 \ \\\\x = 120 \ west[/tex]
The displacement of the skier during the third minute is calculated as follows;
[tex]x = (x_3 - x_2)\\\\x = 120 - 40\\\\x = 80 \ east[/tex]
"Your question is not complete, it seems to be missing the following information"
Learn more about distance and displacement here: https://brainly.com/question/17345815
why black coats are preferable in winter than others
Answer:
the color black draws in heat as lighter colors reflect heat
Explanation:
Why is the astronomical unit used to measure distances in the solar system?
Answer:Astronomers often use the astronomical unit to describe distances within solar systems because it is convenient and easier to understand. The astronomical unit (au or AU) is defined as exactly 149,597,870,700 meters (about 93 million mi), which is roughly equal to the average distance between the Sun and Earth.
Explanation: google
can somone pls help me??!! i’m very stuck
Answer:
R
Explanation:
Her distance from home and Time increase
the stops when she gets to the library
then her distance from home decreases while her time increases
Help me plzzzz
Which product forms from a reaction between magnesium (Mg) and nitrogen
(N)?
A. MgN2
O B. Mg2N3
C. Mg3N2
O D. MgN
Answer:
C. Mg3N2
Explanation:
Magnesium has a positive 2 charge and nitrogen has a negative 3 charge. To completely balance it out, you need three magnesium’s and two nitrogen’s. The final charge for magnesium would be positive 6 and the final charge for nitrogen would be negative 6, this will make it neutral.
Answer:
C. Mg3N2
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COME HELP NOW!!!
Which of these statements about heating up water on Earth's surface is true?
Water heats up faster than land.
Water heats up by convection from Earth.
Water heats up by conduction from the sun.
Water heats up to a lower temperature than land.
Answer:
number 2
Explanation:
the 2 one is right
Question 4 (point)
What is the charge of the nucleus for the atom below?
O a
varies
Positive
Oc
Od
Neutral
Negative
Answer:
Positive
Explanation:
Tbh I dont have an explanation I just wanted to give the answer but its for sure correct!
I will mark a brainluest, And good ponits, Please help me out
Answer:
gas, liquid and the last one is opaque solid
Explanation:
Answer:
gas, liquid and the last one is opaque solid
Explanation:
If the astronaut from question #9 collides with a satellite and comes to a complete stop, where did his momentum go? Explain this in terms of conservation of momentum.
Answer:
m v ´- MV = (m + M) v ’
Explanation:
If the astronaut initially has a speed v the satellite has a speed V, we can define a system that is formed by the two bodies, therefore the forces during the collision are internal, so the momentum is conserved
initial instant. Before the crash
p₀ = m v - MV
final instatne. After the crash, we have two cases
1) inelastic shock
m_f = (m + M) v '
p₀ = p_f
m v ´- MV = (m + M) v ’
2) elastic collision with the astronaut's velocity, zero in this case the moment remains
m v - MV = mv ’+ Mv’
also the kinetic energy is conserved
mv'2 + M V2 = mv'2 + m v'2
with these two equations we can find the speed of the cars
Please answer these three multiple choices!
Would appreciate a loooottttt today!!
Answer:
Q2 [ C ]
Q4 [ C]
Q5 [ C]
if u want the steps write a comment
whoever hears this I want u to know that I am here for I will always be be and so will God. Things well get better I promise!! YOU have to go through the storm to get to the rainbow. TURN TO GOD he will always help u and he loves you and I do to and so does Jesus u got this. DONT GIVE UP and keep on pushing at the end it will all be worth it I promise AND GIVE YOUR LIFE TO JESUS he will help you
Answer:
Awe you too. God is gonna bless you more than anyone. You bring so much courage to the world and some people need to hear this because they are going through it but people like you are amazing and a blessing. Im thankful for this message and i hope you have the best life the Lord could ever give love. You keep on pushing and you will suceed.Explanation:
Answer:
You too :)
Explanation:
Ahmad is riding his bicycle. He finds that he can accelerate from rest at 0.44 m/s^2 for 5 s to reach a speed of 2.2 m/s. The total mass of Christian and his bicycle is 54 kg. Later, he straps some cargo onto the back of his bicycle. The mass of the cargo is 12 kg.• Calculate the force that Christian can exert on his bicycle before picking up the cargo and exerts the same force on his bicycle.
Answer:
1) The force Christian can exert on his bicycle before picking up the the cargo is 529.74 N
2) The force Christian can exert on his bicycle after picking up the the cargo is 647.46 N
Therefore, Christian has to exert more force on his bike after picking up the cargo
Explanation:
The given parameters are;
The mass of Christian and his bicycle = 54 kg
The mass of the cargo = 12 kg
1) The force Christian can exert on his bicycle before picking up the the cargo = Mass of Christian and his bicycle × Acceleration due to gravity
∴ The force Christian can exert on his bicycle before picking up the the cargo = 54 kg × 9.81 m/s² = 529.74 N
2) The force Christian can exert on his bicycle after picking up the the cargo = (54 + 12) kg × 9.81 m/s² = 647.46 N
Therefore, Christian has to exert more force on his bike after picking up the cargo.
(4.81•10^3)+(7.913•10^5)
in scientific notation
Answer:
796110
Explanation:
(4.81)(1000)+7.913(105)
=4810+7.913(105)
=4810+(7.913)(100000)
=4810+791300
=796110
help!
Jerome solves a problem using the law of conservation of momentum. What should
Jerome always keep constant for each object after the objects collide and bounce apart?
velocity
mass
momentum
direction
Answer:
What shouldJerome always keep constant for each object after the objects collide and bounce apart? That would be Mass.
Answer:
B: Mass
Explanation:
A hot air balloon is acted on by two forces. One force is its weight, equal to
2448 newtons. The second force is a buoyant force acting straight up,
equal to 2448 newtons. What change in the motion of the balloon will
result from the action of these two forces?
no change
rising
falling
Answer:
no change
Explanation:
The Newton's Second Law of motion states that when an unbalanced force is applied to an object, it causes an accelerated motion in the object, in the direction of the unbalanced force. So, if there is no unbalanced force, then there is no motion. In this case both the forces have same magnitude and opposite direction. Therefore, the unbalanced force will be zero:
Unbalanced Force = Upthrust - Weight
Unbalanced Force = 2448 N - 2448 N
Unbalanced Force = 0 N
hence, there will be no motion in the vertical direction. Therefore, the correct option is:
no change
PLEASE HELP !
What is the acceleration of a ball that starts at rest and increases in speed
to 20 m/s in 45 seconds? *
Which of the following describes exercise science?
O A. Examining how your diet influences the effects of exercise
OB.
Discovering the influence of exercise on your mood
OC. Evaluating how much muscle you gain after exercising
OD
All of the above
Answer:
C
Explanation:
An educated guess and also i think because it has the word muscle in it
I think the answer is D. All of the above.
but if not then it would be A. Examining how much diet influences the effects of exercise.
Which situation provides the best evidence that a chemical reaction is taking place?
Help please !!!!
Answer:
A new product is formed
Explanation:
Physical reactions generally result in a change of state (solid, liquid, gas). Chemical reactions generally result in the production of a new product/ substance (structure/ properties are different than the intial reactants'... example= burning wood)
A projectile was launched horizontally with a velocity of 388 m/s, 2.89 m above the ground. How long did it take the projectile to hit the ground? Select one: 1.34 s 0.308 s 0.768 s 0.0744 s
Answer:
Explanation:
Given
Velocity = 388m/s
Height S = 2.89m
Required
Time
Using the equation of motion
S =ut+1/2gt²
2.89 = 388t+1/2(9.8)t²
2.89 = 388t+4.9t²
Rearrange
4.9t²+388t-2.89 =0
Factorize
t = -388±√388²-4(4.9)(2.89)/2(4.9)
t= -388±√(388²-56.644)/9.8
t = -388±387.93/9.8
t =0.073/9.8
t = 0.00744 seconds
Suppose a 125 N force is applied to a lawnmower handle at an angle of 35° with the ground and the lawnmower moves along the surface of the ground. If the lawnmower moves 56 m, how much work was done? (hint: use cos to find the x of force vector)
Answer:
Workdone is 5734.06Nm.
Explanation:
Given the following data;
Force applied = 125N
Angle = 35°
Distance = 56m
To find the workdone by the lawnmower, we would first of all find the horizontal component of the force applied.
[tex] Horizontal force, Fx = mgCosd[/tex]
Where;
Fx represents the horizontal force. m is the mass of an object. g is the acceleration due to gravity. d is the angle of inclination (theta).mg = weight = 125N
Substituting into the equation, we have;
[tex] Fx = 125 * Cos35[/tex]
[tex] Fx = 125 * 0.8192[/tex]
Fx = 102.39N
Workdone is given by the formula;
[tex] Workdone = force * distance[/tex]
[tex] Workdone = 102.39 * 56[/tex]
Workdone = 5734.06Nm
Therefore, the work done by the lawnmower is 5734.06Nm.
Why is it difficult to climb on a mountain through vertical path than a curved path
Answer:
a curved path generally goes around all hills and higherpoints in a trail, unlike a straight path which would take you through every single terrain there is on the mountain.
For a less steep slope, less power is needed by the vehicle. The concept is that it will be easier for one to exert less control and that too for a more extended period. So the roads of the mountains are always made curvy and not straight.
Building a road on or around mountains is no simple task. Roads built on mountainsides take weeks, even months of planning and surveying just to determine where to put them. From there, the task becomes even more dangerous and hands-on, but with the help of some heavy machinery and months of work, roads are paved and finished for commuters.Roads are built on mountains by carefully surveying the region, then methodically cutting or blasting into the mountain's side. From there, roads are mapped and paved before being finished and ready for commuters to use.In this article, we'll look at the process of roads being built on mountains and all of the careful steps that go into planning a mountain road. Additionally, we'll answer some commonly asked questions about building roads on mountains.Learn more about mountain roads
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Which line represents a stationary object?
A. Line A
B. Line B
C. Line C
D. Line D
PLZ HELP
Line D represents a stationary object.
When an object is stationary, the line on the graph is horizontal.
When the object is stationary the gradient is?We know, that an object is stationary means the slope of its position-time graph is zero or its pt graph is a straight line parallel to the x-axis.
What is an example of a stationary object?The nest, or the resting place, is a stationary object, and one cannot put one's foot in front of it. A string is then tied from the head assembly to another stationary object.
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Consider again the objects you ranked by distance. Suppose each object emitted a burst of light right now. Rank the objects from left to right based on the amount of time it would take this light to reach Earth, from longest time to shortest time.a. star on far side of Andromeda Galaxyb. star on near side of Andromeda Galaxyc. star on far side of Milky Way Galaxyd. star near center of Milky Way Galaxy1. Orion Nebula2. Alpha Centauri3. Pluto4. The Sun
Answer:
Following are the solution to this question:
Explanation:
That light takes a very long time to hit the planet, and the object is far off the earth. The light of such an item near to the planet takes less time to enter it. The star is 2,5 million light-years from the Planet on the far side of the Andromeda Galaxy. But on the other hand, the moon is 15 crore miles from the earth, so sunlight is quickly reached on the ground as the other thing.
That milky way away from the earth is 66,500 light-years far, that distance between Earth and Orion nebula is 1,344 light-years, with such a distance of 4,367 light-years. The earth is 5.2261 trillion km apart from Pluto.