Answer:
35 m/s
Explanation:
Given that an automobile was moving at 15m/s and accelerated at 2m/s^2 for 10s. what is the final speed ?
The parameters given are :
initial velocity U = 15 m/s
Acceleration a = 2 m/s^2
Time taken = 10s
Using first equation of motion;
V = U + at
V = 15 + 2 * 10
V = 15 + 20
V = 35 m/s
Therefore, The final speed is 35 m/s
The final speed of automobile moving at the given initial speed and acceleration is 35m/s.
Given the data in the question;
Initial velocity of the automobile; [tex]u = 15m/s[/tex]Acceleration of the automobile; [tex]a = 2m/s^2[/tex]Time taken; [tex]t = 10s[/tex]Final velocity of the automobile; [tex]v = ?[/tex]
To determine the final velocity of the automobile, we use the First Equation of Motion:
[tex]v = u + at[/tex]
Where v is final velocity, u is initial velocity, a is acceleration and t is time taken.
We substitute our given values into the equation
[tex]v = 15m/s + [ 2m/s^2 * 10s ]\\\\v = 15m/s + 20m/s\\\\v = 35m/s[/tex]
Therefore, the final speed of automobile moving at the given initial speed and acceleration is 35m/s.
Learn more on Equations of Motion here: https://brainly.com/question/20638167
What is the wavelength of a wave with a frequency of 330 Hz and a speed of
343 m/s?
A. 1.04 m
B. 1.13 x 105 m
O C. 8.8 x 10-6 m
D. 0.96 m
Answer:
A
Explanation:
wavelength can be obtained by speed of the wave divided by its frequency
[tex] \frac{343}{330} [/tex]
1.04m
Answer:
Correct answer - A) 1.04 m
Explanation: just did the quiz
A van slows down uniformly from 17 m/s to 0 m/s in 5 s. How far does it travel before stopping?
Procedure is required.
Answer:
Before stopping, the van travels 42.5 m
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
[tex]v_f=v_o+at\qquad\qquad [1][/tex]
The distance traveled by the object is given by:
[tex]\displaystyle x=v_o.t+\frac{a.t^2}{2}\qquad\qquad [2][/tex]
The van slows down uniformly from v0=17 m/s to vf=0 m/s in t=5 s. The acceleration can be calculated by solving [1] for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
[tex]\displaystyle a=\frac{0-17}{5}=-3.4\ m/s^2[/tex]
The distance covered is:
[tex]\displaystyle x=17\cdot 5+\frac{(-3.4)\cdot 5^2}{2}[/tex]
[tex]\displaystyle x=85-42.5=42.5[/tex]
Before stopping, the van travels 42.5 m
Imagine you are rolling a marble down a wooden ramp for an experiment. What are some variables you can experiment with to increase the velocity of the marble? *
Answer:
Explanation:
In free fall, gravity constantly accelerates an object (increases its velocity)—until it hits terminal velocity. Specifically, gravity increases a falling object's velocity by 9.8 meters per second (m/s) with every passing second. (Whereas velocity is measured in m/s, acceleration is measured in meters per second squared, or m/s2.) How does this constant acceleration affect the distance that an object travels over time? In this experiment you will roll a marble down a ramp to find out.
By adjusting the ramp's height, width, or inclination, you can increase the velocity at which the marble travels down it.
What is ramp?As a tool for lifting or lowering a load, an inclined plane, sometimes referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other.
One of the six traditional simple devices that Renaissance scientists defined is the inclined plane. Heavy weights are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending an incline.
Less force is needed to push an object up an inclined plane than to lift it straight up, but the distance travelled is greater.
Learn more about ramp here:
https://brainly.com/question/13492520
#SPJ2
If a car travels 40 mph for a distance of 1680 miles, how much time did it take?
Answer:
42 hour
Explanation:
It is given that,
Speed of a car, v = 40 mph
Distance covered by the car, d = 1680 miles
We need to find the time taken by the car to cover this distance. We can find it using the formula of speed which is equal to the distance covered divided by the time taken. Let the time is t.
speed = distance/time taken
[tex]t=\dfrac{d}{s}\\\\t=\dfrac{1680\ \text{miles}}{40\ \text{mph}}\\\\t=42\ \text{hour}[/tex]
Hence, the car will take 42 hours to cover 1680 miles with a speed of 40 mph.
What are the causes of season change in the earth
Answer:
the causes of season change on the earth is due to the tilted axis
When candle wax is heated enough, it becomes a liquid and flows. However, if it isn't heated, candle wax is a solid. Which of the following explains why liquid candle wax flows but solid wax does not?
○ the molecules of the Liquid wax are softer than the molecules of the solid matte wax.
○ The molecules of the liquid wax have less mass than the molecules of the solid wax.
○ The molecules of the liquid wax can easily move past one another but the molecules of the solid wax cannot.
Answer:
C
Explanation:
Mass
An object accelerated at a rate of 50 m/s/s. A force of
100 N was used to make this happen. What is the mass
of the object?
kg
HELP ME PLS
Answer:
2kg
Explanation:
100N = Force 50m/s²= Acceleration
Mass=?
the equation is;
Mass(kg)= Force(N) ÷ Acceleration (m/s²)
100÷50=2
3 The diagram shows a model of an atom. The model has four different symbols on it. Each
symbol represents a different role for one of the particles within the atom.
Model Atom
(W
Particle
w
Charge
Negative
Positive
х
Y
Neutra!
Negative
z
w
In this model, which particle determines the identity of this atom?
A Particle w
C Particle Y
B Particle X
D Particle z
The Answer is particle Z
Answer:
answer is D
Explanation:
!PLEASE HELP PLEASE!Why is wax the same suspense when it melts from a candle?
(Even though wax melts from a candle, it is still the same substance. Why is that?)
Answer:
it is the same substance because it didn't change the process of that it was it just changed its state for would to liquid
what does a worm and wheel mechanism do to torque and speed
Answer:Explanation:
Image result for what does a worm and wheel mechanism do to torque and speed
Like other gear arrangements, a worm drive can reduce rotational speed or transmit higher torque. ... Each full 360 degree turn of a single start worm advances the gear by one tooth. For a multi start worm the gear reduction equals the number of teeth on the gear divided by the number of starts on the worm.
A delivery truck travels 2.8 km North, 1.0 km East, and 1.6 km South. The final displacement from the origin is ___km to the ___.(round to the nearest tenth) (write the resultant vector as NE, SE, NW, or SW)
Answer:
The final displacement from the origin is 1.6 km to the NE
Explanation:
The directions in which the delivery truck travels are;
1) 2.8 km North = 2.8·[tex]\hat j[/tex], in vector form
2) 1.0 km East = 1.0·[tex]\hat i[/tex], in vector form
3) 1.6 km South = -1.6·[tex]\hat j[/tex], in vector form
Therefore, to find the final displacement, Δx, of the delivery truck, we add the individual displacements as follows;
Final displacement, Δd = 2.8·[tex]\hat j[/tex] + 1.0·[tex]\hat i[/tex] +(-1.6·[tex]\hat j[/tex]) = 1.2·[tex]\hat j[/tex] + 1.0·[tex]\hat i[/tex]
Final displacement, = 1.0·[tex]\hat i[/tex] + 1.2·[tex]\hat j[/tex]
Where;
Δx = The displacement in the x-direction = 1.0·[tex]\hat i[/tex]
Δy = The displacement in the y-direction = 1.2·[tex]\hat j[/tex]
The magnitude of the resultant displacement vector is given as follows
[tex]\left | d \right |[/tex] = √((Δx)² + (Δy)²) = √(1² + 1.2²) ≈ 1.6 (To the nearest tenth)
The magnitude of the resultant displacement vector ≈ 1.6 km
The direction of the resultant vector is positive for both the east and north direction, therefore, the direction of the resultant vector = NE
Therefore, the resultant displacement of the delivery truck is approximately 1.6 km, NE from the origin.
Which of the following is true? *
Electronics and neutrons have the same mass.
Protons and electrons have the same mass.
All subatomic particles have the same mass.
Protons and neutrons have the same mass.
Answer: D. Protons and neutrons
Explanation: PLEASE GIVE BRAINLIEST IT HELPS ALOT
A go cart engine applies a force of 888N and moves the cart forward 22m.
a) How much work is done?
b) We put on a bigger engine (1111N) but the cart still moves forward 22m. How much work is done now?
c) Why would you put on a bigger engine if you are still moving 22m?
Answer:
Explanation:
a) work=Force times distance. given force is 888N and distance travelled is 22M
work= 888 x 22 = 19536J or 1.954x10^5J
b) work = 1111 x 22= 24442J or 2.444x10^5J
c) putting on a larger engine means that there are gonna be more force applied to the go cart. therefore the cart will travel the same distance faster
a. The amount of work done by the go cart engine is 19,536 Nm.
b. The amount of work done when a bigger engine is used is 24,442 Nm.
c. The reason why a bigger engine is used is, so that the engine can easily do more work in the same amount of distance.
Given the following data:
Force A = 888 NewtonDistance = 22 meterForce B = 1111 Newtona. To determine the amount of work done by the go cart engine:
Mathematically, the work done by an object is given by the formula;
[tex]Work\;done = Force \times distance[/tex]
Substituting the given parameters into the formula, we have;
[tex]Work\;done = 888 \times 22[/tex]
Work done = 19,536 Nm.
b. To determine the amount of work done when a bigger engine is used:
[tex]Work\;done = Force \times distance[/tex]
[tex]Work\;done = 1111 \times 22[/tex]
Work done = 24,442 Nm.
c. The reason why a bigger engine is used is, so that the engine can easily do more work in the same amount of distance.
Read more: https://brainly.com/question/22599382
If a rock falls for 5 seconds near the surface of the earth and with no air friction, it will reach a velocity of
Answer: -49m/s.
Explanation:
As the rock only falls, we will assume that the initial vertical velocity is zero.
We neglect the air friction, so the only force acting on the rock is the gravitational force, this means that the acceleration is -g = -9.8m/s^2.
Then we can write:
a(t) = -9.8m/s^2
To write the velocity of the rock, we must ingrate over time and get:
v(t) = (-9.8m/s^2)*t + v0
where v0 is the initial vertical velocity, and as we said above, v0 = 0m/s
Then the vertical velocity as a function of time is:
v(t) = (-9.8m/s^2)*t
Now, the question is:
"...If a rock falls for 5 seconds near the surface of the earth and with no air friction, it will reach a velocity of..."
Then we need to evaluate the velocity equation in t = 5 seconds.
v(5s) = (-9.8m/s^2)*5s = -49m/s.
Two hockey players are about to collide on the ice, One player has a mass of
65 kg and is traveling at 1.8 m/s east. The other has a mass of 70 kg and is
traveling at 1.4 m/s west. The system consists of the two hockey players,
According to the law of conservation of momentum, what is the total
momentum of the system after they collide? Assume the collision is an
elastic collision
A. 19 kg'm/s east
B. 215 kgm/s east
C. 19 kgm/s west
D. 215 kgm/s west
Answer: 19kg•m/s east
Explanation:
The total momentum of the system after they collide will be equal to 19 kg m/s east. Hence, option A is correct.
What is momentum?The momentum is the result of a particle's velocity and its mass. Force and motion, meaning it has both magnitude and the direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of increase of momentum.
The impulse, which is the product of the force and the intervals (the impulse), is equal to the difference in momentum, according to Newton's 2nd law, if a steady force operates on a particle for a specific amount of time. On the other hand, a particle's momentum is the amount of time needed for a consistent action to fight it to rest.
As per the given information in the question,
Mass, m₁ = 65 kg
Mass, m₂ = 70 kg
Velocity, v₁ = 1.8 m/s
Velocity, v₂ = 1.4 m/s
Use the law of conservation of momentum,
P = m₁v₁ = m₂v₂
Here, P is the total momentum.
⇒ 65 × 1.8 = 78 × 1.4
= 117 east = 98 west
P = 117 - 98
P = 19 kg m/s east.
To know more about Momentum:
https://brainly.com/question/24030570
#SPJ2
Which best explains why a scientific idea would lack scientific consensus?
Answer: I hope you have a great day. And I hope this helps.
Explanation: Scientific ideas don't need to be resourced in a book: For example, they need to be published in a peer-reviewed journal.
Furthermore, public favoring is not material: global warming is accepted in the scientific community despite a lack of popular favoring.
The correct answer is: They are new ideas. (and once they're accepted they can become laws).
What is the point on the globe to the right that receives 24 hours of daylight on the December solstice?
Answer:
north of 66.5 degrees latitude;90 degrees minus and filt of earth axis receive 24 hrs of sunlight
how many tennis balls are in 8 bags if each bag holds 25 tennis balls.
The answer is 200, 200 tennis balls would be in 8 bags if they each held 25.
Answer:
200 balls
Explanation:
When an object gains thermal energy, the molecules inside the object move faster.
True or False?
Answer:
true
Explanation:
when the heat rises the molecules inside vibrate much faster than when ever they cool down because they are slower, think of it as if you were frozen but could still move, you'd be slow but if you weren't and were warmer your system can work more and you can run faster than when you were frozen.
Which has more inertia?
A human or an elephant and explain why?
Answer:
A human
Explanation:
An elephant weighs more, therefore it's gravitational pull by Earth impacts it more than a human.
Hope this helps!
Have a nice day!
If you find my answer helpful
Pls consider marking my answer as Brainliest! It would mean a lot!
Answer:
Explanation:
Think of it this way: An elephant has more inertia than a human. It is much harder to push an elephant across a floor than it is a human, and much harder to stop the elephant once it is moving. Therefore, by definition, an elephant has more mass than a human.
13. How much dimmer than the sun is Eridani B2
Answer: Eridani B2 appears only [tex]6.73[/tex]×[tex]10^{-13}[/tex] as bright as the sun.
A 1200 kg car accelerates from rest for 45 meters in 6.0 seconds. What is the net force on the car?
Answer:
Explanation:
At first, you have to get the acceleration value from the given data.
[tex]s=ut+\frac{1}{2}at^{2}[/tex]
s= 45m
u= 0 m/s
t = 6s
a = ?
45 = 0+ 0.5 × a × 6²
45 = 0.5 × 36 × a
45 = 18a
a = 2.5 m/s²
Now, you can use F=ma equation
F = ?
m = 1200kg
a = 2.5 m/s²
F = 1200 × 2.5
F = 3000 N
Which refers to the distance between two crests or two troughs on a transverse wave? wavelength amplitude frequency hertz
Answer:
Wavelength
Explanation:
The distance between two crests or two troughs on a transverse wave is known as the wavelength.
What is a wavelength?The wavelength of a periodic wave is its spatial period or the distance over which the wave's structure repeats. It's the distance between two adjacent corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero-crossings, and it's a feature of both travelling and standing waves, as well as other spatial wave patterns.
As discussed above the wavelength, therefore, the distance between two crests or two troughs on a transverse wave is known as the wavelength.
Learn more about Wavelength:
https://brainly.com/question/13533093
HURRY PLEASE!!
The particles of solids are packed together tightly, so sound waves travel faster through solids than through liquids or gases. How do light waves differ from sound waves?
A. Light waves require a medium and travel fastest through liquids
B. Light waves require a medium, but travel fastest through a vacuum
C. Light waves do not require a medium, but travel fastest through solids
D.
Light waves do not require a medium and travel fastest when in a vacuum
Answer:
Hope it help you
Stayhomestaysafe
Plz mark my answer brainliest✍️✍️
Explanation:
Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
Option b
REAL NAME - SHRESTH DUBEY
Embarking on a road trip, you hope to average a speed of 90.0 km/hr. Driving through bad weather, you finally reach the midpoint (half the distance) of your trip, but realize that you have only been averaging 5.0 X 10^1 km/hr. How fast would you have to drive the second half of the trip to keep your desired arrival time? *
Answer:
Explanation:
average speed = 90 km / hr
Let the total distance be 2 d .
time required to cover the time = 2 d / 90
time taken to cover distance d at 50 km /h = d / 50
time required to cover the nd half = 2 d / 90 - d / 50
.02222 d - .02 d = .002222 d
speed required = d/2 / .002222d
1 / 2 x .002222
= 225 km /h .
Someone, please help me with this
1. Distance traveled during the first minute (A-B) *
40 m
100 m
140 m
180 m
2. Displacement after the first minute (A-B) *
180 m west
180 m east
100 m west
100 m east
3. Distance traveled during the first 2 minutes (A-B-C)
40 m
140 m
320 m
420 m
4. Displacement after the first 2 minutes of travel (A-B-C) *
40 m east
40 m west
140 m east
140 m west
5. Distance traveled during the total time of 3 minutes (A-B-C-D) *
140 m
240 m
360 m
420 m
6. Displacement after the total 3 minutes of travel (A-B-C-D) *
40 m east
40 m west
140 m east
140 m west
Answer:
Explanation:
1). Distance traveled during the first minute (A-B)
= Distance from A to C + Distance from C to D + Distance from D to B
= 40 + 100 + 40
= 180 m
Option (4) will be the answer.
2). Displacement after first minute (A-B)
= Distance from A to B
= 180 m East
Option (2) is the answer.
3). Distance traveled during the first 2 minutes (A - B - C)
= Distance from A to B + Distance from B to C
= 180 + 140
= 320 m
Option (3) will be the answer.
4). Displacement after first 2 minutes (A-B-C)
= Distance between A and C
= 40 m towards east
Option (1) is the answer.
5). Distance traveled during 3 minutes (A-B-C-D)
= Distance between A to B + Distance between B to C + Distance between C to D
= 180 + 140 + 100
= 420 m
Option (4) is the answer.
6). Displacement after total 3 minutes (A-B-C-D)
= Distance between A and D
= Distance between A to C + distance between C to D
= 40 + 100
= 140 m
And the direction is towards East.
Option (3) is the answer.
A volcano erupts, and a chunk of hot magma is launched horizontally with a speed of 208\,\dfrac{\text m}{\text s}208 s m 208, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction from a height of 94\,\text m94m94, start text, m, end text. We can ignore air resistance.
Answer:
a. 42.92 m/s b 4.4 s c. 915.2 m
Explanation:
Here is the complete question
A volcano erupts, and a chunk of hot magma is launched horizontally with a speed of 208 m/s, from a height of 94 m. We can ignore air resistance.
What is the vertical velocity of the magma when it hits the ground?
Solution
a. Using v² = u² - 2gy since it is motion under gravity, where u = initial vertical velocity = 0 m/s, g = acceleration due to gravity = -9.8 m/s² and y = height = 94 m.
Substituting these values into the equation, we have
v² = u² - 2gy
v² = 0² - 2 × (-9.8 m/s²) × 94 m
v² = 1842.4 m²/s²
v = √1842.4 m²/s²
v = 42.92 m/s
b. We also find the time it takes to drop from the height of 94 m from
y = ut - 1/2gt² , u = 0
So, t = √(2y/g)
= √(2 × 94 m ÷ 9.8 m/s²)
= √19.184 s²
= 4.4 s
c. The horizontal distance the chunk of hot magma covers is thus x = Vt where v = horizontal velocity = 208 m/s
x = 208 m/s × 4.4 s = 915.2 m
Answer:
that's wrong its 911
Explanation:
trust me
A van moves 100 km in 2 1/2 hours.
What is its average speed in kilometers
per hour?
Answer:
0.40km/h
I think.. Hope this helps <3
what are the 2 forces acting on a projectile
Answer:
horizontal and vertical motion
Explanation:
By definition, a projectile has a single force that acts upon it - the force of gravity. If there were any other force acting upon an object, then that object would not be a projectile. Thus, the free-body diagram of a projectile would show a single force acting downwards and labeled force of gravity (or simply F^grav).
Explain why a book placed on a table does not move?
The book does not contain inertia.
There is no force exerting on the book in order for it to move.
The table contains more inertia than the book.
The force that the book exerts down on the table is equal to the force the table exerts upward.
Answer:
The force that the book exerts down on the table is equal to the force the table exerts upward.
Explanation:
I am 100% positive. That results in balanced forces which is why it does not move. If you did want it to move, you would apply unbalanced forces.
Answer:
4th: "The force that the book exerts down on the table is equal to the force the table exerts upward"
Explanation:
Basically, a book on a table is balanced in terms of forces. Gravity is opposed by the table and there are no forces acting to move the book in any direction. If there was a breeze that was not strong enough to move the book, it is because the force of friction is equal to that provided by the breeze.
