Answer:
in science and engineering , the weight of an object is the force acting on the object due to gravity.
An automobile manufacturer claims that its product will, starting from rest, travel
400 m in 9.0 s. What is the acceleration required to do this?
Answer:
Acceleration, a = 9.877m/s²
Explanation:
Given the following data;
Distance, d = 400m
Time, t = 9secs
Since it's starting from rest, initial velocity, u = 0
To solve for acceleration, we would use the second equation of motion;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Substituting into the values into the equation;
[tex] 400 = 0(9) + \frac {1}{2}a(9)^{2}[/tex]
[tex] 400 = \frac {1}{2}a81[/tex]
Cross multiplying, we have;
[tex] 800 = a81[/tex]
[tex] a = \frac {800}{81}[/tex]
a = 9.877m/s²
Therefore, the automobile would have to accelerate at a constant rate of 9.877m/s²
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
What are the benefits and drawbacks of using renewable energy sources to generate electricity?
Answer:
benefits
Diversifying energy supply and reducing dependence on imported fuels.
Creating economic development and jobs in manufacturing, installation, and more.
drawbacks
Large areas of landfill are required
Hydroelectric power is generated from flowing water, which turns turbines and generates electricity
Explanation:
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
A marble rolls horizontally off a table that is 0.8 m tall. If the marble lands 0.6 m from the base of the table,
what is the initial velocity of the marble?
Answer:
Explanation:
Time of fall be t
Considering downward fall
h = 1/2 g t²
.8 = .5 x 9.8 t²
t² = .16
t = .4 s
Marble lands at .6 m away from the base
If u be its horizontal initial velocity
u x .4 = .6
u = 1.5 m /s .
The initial velocity of the marble will be "1.5 m/s".
Speed and VelocityAccording to the question,
Height of table, h = 0.8 m
Marble lands = 0.6 m
Acceleration due to gravity, g = 9.8
Let,
The time of fall be "t".
We know the relation,
→ h = [tex]\frac{1}{2} gt^2[/tex]
By substituting the values, we get
0.8 = 0.5 × 9.8 t²
t² = 0.16
t = √0.16
= 0.4 s
hence,
The horizontal initial velocity will be:
→ u × 0.4 = 0.6
u = [tex]\frac{0.6}{0.4}[/tex]
= 1.5 m/s
Thus the answer above is appropriate.
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What causes scoliosis
Answer:
Scoliosis is a sideways curvature of the spine. Scoliosis is a sideways curvature of the spine that occurs most often during the growth spurt just before puberty. While scoliosis can be caused by conditions such as cerebral palsy and muscular dystrophy, the cause of most scoliosis is unknown.
A circuit consists of a wire, a lightbulb, a switch, and a battery. What would
happen if the battery were replaced with a section of wire?
Electricity needs a path to follow to get from one destination to another. And the journey is always the same: Power – Electricity always starts from a source, like a battery or an outlet.
What is a battery ?
"A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit."
What is circuit ?
"In electronics, a circuit is a complete circular path that electricity flows through. A simple circuit consists of a current source, conductors and a load. The term circuit can be used in a general sense to refer to any fixed path that electricity, data or a signal can travel through."
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The number of protons and neutrons in an atom is that atom’s _____________ number.
HELP PLEASE
Answer:
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
Explanation:
Please mark as brainliest
Answer:
Explanation:
atomic mass
!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
Be specific when answering both of the following question. When will a balloon powered car have potential energy?
Answer: Explanation:
Balloons are elastic and store potential energy when they are filled with air. When the air is released, the potential energy is converted into the energy of motion, which is also known as kinetic energy. This is the energy you see when the car is propelled forward.
The center of the Milky Way contains a_______
plz help fill in the blank
Answer:
Sagittarius A
At its center, surrounded by 200-400 billion stars and undetectable to the human eye and by direct measurements, lies a supermassive black hole called Sagittarius A*, or Sgr A* for short. The Milky Way has the shape of a spiral and rotates around its center, with long curling arms surrounding a slightly bulging disk.
Explanation:
Answer:
black hole is the answer
Explanation:
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 bowling ball rolls 33\,\text m33m33, start text, m, end text with an average speed of 2.5\,\dfrac{\text m}{\text s}2.5 s m 2, point, 5, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. How many seconds did the ball roll?
The ball rolled for 13.2 s
Further explanationSpeed is scalar and no direction
[tex]\tt avg~speed=\dfrac{total~distance}{elapsed~time}=\dfrac{\Delta x}{\Delta t}[/tex]
A bowling ball rolls 33 m, with average speed = 2.5 m/s
So elapsed time :
[tex]\tt t=\dfrac{33~m}{2.5`m/s}=13.2~s[/tex]
Answer:
13.2
Explanation:
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).
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
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.
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True or False: The definition of flexibility is the ability of a joint or a series of joints to move through an unrestricted, pain-free range of motion.
Answer:
true
Explanation:
hope I helped a bit
Watch theses videos first:
1. Will put the link in the chat
Then go to this link when you go there you will see request access sent me request saying brainly in the box the I will accept it then you watch the video up there then you then you will complete the slide that you will request for I will be posting the link to that in the chat.
Here is the directions for the slide you guys are going to be doing:
Step 1: Draw a model to show how sound is created and how you think it makes the windows move.
Step 2: Label your model with explanations. Include all of these science vocabulary/concepts: vibrations/oscillations, force, energy, and transfer.
By the way this the Brainly committee we will be testing how smart you guys are so guys prove it. If you do this right the Brainly will sent 500 brainly points into the account that answers it right. If you have any questions please ask.
Answer:
Not 500 points I got 18 but thx
Explanation:
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
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.
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 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).
For years, the tallest tower in the United States was the Phoenix Shot Tower in Baltimore, Maryland. The shot tower was used from 1828 to1892 to make lead shot for pistols and rifles and molded shot for cannons and other instruments of warfare. Molten lead was dropped from the top of the 82.15 m tall tower into a vat of water. During its free fall, the lead would form a perfectly spherical droplet and solidify. Determine the velocity of the droplet right before it hits the ground.
Answer:
The velocity of the droplet right before it hits the ground is 40.08 m/s.
Explanation:
To determine the velocity of the droplet right before it hits the ground,
From one of the equations of kinematic for free fall motions,
v = u + gt
Where v is the final velocity
u is the initial velocity
g is acceleration due to gravity (take g = 9.8 m/s²)
and t is time
For the question, v is the velocity of the droplet right before it hits the ground.
u = 0 m/s (Since the molten lead was dropped from rest)
Therefore,
v = gt
First, we will determine the time t
Also, from one of the equations of kinematic for free fall motions,
h = ut + 1/2(gt²)
u = 0 m/s
From the question, the molten lead was dropped from the top of the 82.15 m tall tower, therefore
h = 82.15
Hence,
82.15 = 0×t + 1/2 (9.8 × t²)
82.15 = 1/2 (9.8 × t²)
82.15 = 4.9 t²
t² = 82.15/4.9
∴ t = 4.09 secs
Now, for the velocity v, of the droplet right before it hits the ground,
Recall
v = gt
Then,
v = 9.8 × 4.09
v = 40.08 m/s
Hence, the velocity of the droplet right before it hits the ground is 40.08 m/s.
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:
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.
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
Which other subatomic particle has the same mass as a neutron
Answer:
.................... protons :)
Answer:
protons
The two subatomic particles that have the same mass are protons and neutrons.
Why is the velocity of a wave in shallow water proportional to depth of water
This diagram shows two different forces acting on a skateboarder. The combined mass of the skateboard and the person is 81.5 kg. Based on this information, what is the acceleration of the skateboarder?
A. 0.51 m/s² to the left
B. 1.95 m/s² to the left
C. 0.51 m/s² to the right
D 1.94 m/s² to the right
Answer:
Option C. 0.51 m/s² to the right.
Explanation:
We'll begin by calculating the net force acting on the skateboarder. This is illustrated below:
Force applied (Fₐ) = 52.8 N
Force resistance (Fᵣ) = 11.4 N
Net force (Fₙ) =.?
Net force (Fₙ) = Force applied (Fₐ) – Force resistance (Fᵣ)
Fₙ = Fₐ – Fᵣ
Fₙ = 52.8 – 11.4
Fₙ = 41.4 N to the right
Thus, the net force acting on the skateboarder is 41.4 N to the right.
Finally, we shall determine the acceleration of the skateboarder as shown below:
Mass (m) = 81.5 kg.
Net force (Fₙ) = 41.4 N to the right
Acceleration (a) =..?
Net force (Fₙ) = mass (m) × acceleration (a)
Fₙ = ma
41.4 = 81.5 × a
Divide both side by 81.5
a = 41.4 / 81.5
a = 0.51 m/s² to the right.
Therefore, the acceleration of the skateboarder is 0.51 m/s² to the right.
Answer: .5 m/s to right
Explanation:
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