Answer:
48 m/s
Explanation:
Given:
Δx = 250 m
v₀ = 19 m/s
a = 3.9 m/s²
Find: v
v² = v₀² + 2aΔx
v² = (19 m/s)² + 2 (3.9 m/s²) (250 m)
v ≈ 48 m/s
when the wind blows it creates a pressure on any force it blows against. A large pressure window has an area of 3.5m2. If the wind causes a pressure of 2000Pa on the window what force acts on it?
Answer:
The force acting on the window is 7000N.
Explanation:
Given that the formula for pressure of solid is P = Force/Area. Then, you have to substitute the values into the formula :
[tex]pressure = \frac{force}{area} [/tex]
[tex]let \: pressure = 2000,area = 3.5[/tex]
[tex]2000 = \frac{force}{3.5} [/tex]
[tex]2000 \times 3.5 = force[/tex]
[tex]force = 7000N[/tex]
Given:-
Area of the window = 3.5 m²Pressure generated = 2000 PaTo Find: Force exerted by the air to the window.
We know,
P = F/A
where,
P = Pressure,F = Force &A = Area.Similarly,
F = PA
→ F = (2000 Pa)(3.5 m²)
→ F = (2000 N/m²)(3.5 m²)
→ F = (200 N)(35)
→ F = 7000 N (Ans.)
Two students make a model of a tree House they want to build. the scale 1:42 in the scale model the treehouse door is 3 cm tall how tall should the real treehouse store be
A 36cm
B 126cm
C 14cm
D 45cm
Answer:
Option B. 126 cm.
Explanation:
From the question given above,
The scale = 1 : 42.
Height of the real door =...?
The scale for the tree house project is
1 : 42. This implies that for every 1 cm on paper, it represents 42 cm on land.
Now, if the height of the door on paper is 3 cm, then the height of the door on land = 3 × 42 = 126 cm on land.
Therefore, the real tree house door is 126 cm tall.
A car slows down from a velocity of 25 m/s to rest in 5.0 seconds. How far did the car travel during that time?
Answer:
[tex] \boxed{\sf Distance \ travelled = 62.5 \ m} [/tex]
Given:
Initial velocity (u) = 25 m/s
Final velocity (v) = 0 m/s (Rest)
Time taken (t) = 5 seconds
To Find:
Distance travelled by car (s)
Explanation:
From equation of motion of object moving with uniform acceleration in straight line we have:
[tex] \boxed{ \bold{s = (\frac{v + u}{2} )t}}[/tex]
By substituting value of v, u & t in the equation we get:
[tex] \sf \implies s = ( \frac{0 + 25}{2} ) \times 5 \\ \\ \sf \implies s = \frac{25}{2} \times 5 \\ \\ \sf \implies s = 12.5 \times 5 \\ \\ \sf \implies s = 62.5 \: m[/tex]
[tex] \therefore[/tex]
Distance travelled by car (s) = 62.5 m
The distance car travel during that time is 62.5 meter.
What is acceleration?
Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Initial velocity (u) = 25 m/s
As the car becomes rest, final velocity (v) = 0 m/s (Rest)
Time taken (t) = 5 seconds.
The deceleration of the car: a = (initial speed - final speed)/time interval
= ( 25 m/s - 0 m/s)/5 second
= 5 m/s²
The distance car travel during that time = ut - at²/2
= 25 × 5.0 meter - (5×5²/2) meter
= 62.5 meter.
Hence, the distance car travel during that time is 62.5 meter.
Learn more about acceleration here:
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QUICKLY PLS
What is the period of a pendulum that takes
one second to make a complete back-and-
forth vibration?
Answer:
what is the period of a pendulum that takes one second to make a complete back-and-forth vibration? Suppose that a pendulum has a period of 1.5 seconds. How long does it take to make a complete back-and-forth vibration? The period of the pendulum would be 1.5 seconds divided by 1 cycle = 1.5 seconds.
Explanation:
because it is
Calculating density help me illl give brainliest
Answer:
1. 0.2 g/cm³.
2. 1 g/cm³.
3. 0.72 g.
Explanation:
1. Determination of the density of the bread.
Volume (V) = 2270 cm³
Mass (m) = 454 g
Density (D) =?
The density of a substance is simply defined as the mass of the substance per unit volume of the substance. It is represented mathematically as:
Density (D) = mass (m) /volume (V)
D = m/V
With the above formula, we can calculate the density of the bread as follow:
Volume (V) = 2270 cm³
Mass (m) = 454 g
Density (D) =?
D = m/V
D = 454/2270
D = 0.2 g/cm³
Therefore, the density of the bread is 0.2 g/cm³.
2. Determination of the density of water.
Volume (V) = 1 L
Mass (m) = 1000 g
Density (D) =?
Next, we shall convert 1 L to cm³. This can be obtained as shown below:
1 L = 1000 mL
1 mL = 1 cm³
1000 mL = 1000 cm³
Therefore,
1 L = 1000 mL = 1000 cm³
Therefore, 1 L is equivalent to 1000 cm³.
Finally, we shall determine the density of water as follow:
Volume (V) = 1000 cm³
Mass (m) = 1000 g
Density (D) =?
D = m/V
D = 1000 / 1000
D = 1 g/cm³
Therefore, the density of water is 1 g/cm³.
3. Determination of the mass of the block of wood.
Density (D) = 0.6 g/cm³
Volume (V) = 1.2 cm³
Mass (m) =...?
D = m/V
0.6 = m/1.2
Cross multiply
m = 0.6 × 1.2
m = 0.72 g
Therefore, the mass of the block of wood is 0.72 g.
Given no air resistance, all objects near the Earth's surface – regardless of
size and weight – fall with the same acceleration because of gravity.
True or False ?
Answer:
True
Explanation:
How is a vector represented in symbol form?
The largest formal unit of geologic time is ______.
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{eon}}}}}[/tex]
Explanation:
The largest formal unit of geologic time is eon .
Hope I helped!
Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?
elliptical
irregular
barred spiral
normal spiral
The type of galaxy which has arms that contain sites of active star formation and start close to a bulge in the center is: D. normal spiral.
A star can be defined as a giant celestial (astronomical) object that is made up of a luminous sphere of plasma bounded together by its own gravitational force.
Generally, a star comprises two (2) main interstellar hot gases and these include:
I. Hydrogen (H).
II. Helium (He).
A galaxy refers to a collection of billions of stars, which are existing independently.
This ultimately implies that, the greatest number of stars are found in a galaxy.
According to astronomers, the galaxy is classified into four (4) main categories and these are:
Elliptical galaxy.Irregular galaxy.Peculiar galaxy.Spiral galaxy.Furthermore, spiral galaxies are divided into two (2) major groups such as:
I. Barred spiral.
II. Normal spiral.
A normal spiral is typically made up of arms containing sites of active star formation and it start close to a bulge in the center.
Find more information: https://brainly.com/question/17934476
Answer:
D) normal spiral
Explanation:
Whoever answered it practically wrote a life story. There's no need for an explanation; just get to the point and tell us the answer. But anways, the answer is D.
How can Climate Change impact the formation of Hurricanes?
A hurricane is just like any other low-pressure system.
But it gets bigger, and stronger, and picks up a lot of rain, by passing over warm, tropical ocean water.
If anything like climate change or hot fish were to come along and make that water warmer, then there would be more energy for the low pressure system to absorb from the warmer water. Then it would get even bigger and stronger, and it would pick up even more rain on its way over.
Also, normal-size low-pressure systems over the ocean that could never become tropical storms or hurricanes before, COULD do it now that the ocean is warmer. (Notice how this year, 2020, there have been so many hurricanes and tropical storms that NOAA ran out of names for them, and had to start using Greek letters. This has only happened once before.)
give two examples of vernier calliper
Answer:
Example 1, if a vernier caliper output a measurement reading of 2.13 cm, this means that: The main scale contributes the main number(s) and one decimal place to the reading
E.g. 2. 1 cm, whereby 2 is the main number and 0.1 is the one decimal place number
Explanation:
plz mark as brainliest and hope it helps you
Which of the following processes puts carbon from a forest
floor back into the atmosphere?
Answer:
earth process meaning subduction
h e l p a h o m i e o u t t h a n k s
If a car travels 400m in 20 seconds how fast is it going? 20 m/s
Answer:
20m/s
Explanation:
Speed = distance / time
Speed = 400/20
Speed = 20
what is the center of gravity
Answer:
The center of gravity is the average location of the weight of an object
Explanation:
How much force is generated when a 200 kg block is accelerated at a rate of 25 m/s?
Answer:
F= 5000 N
Explanation:
This problem is related to force on a body, and to tackle it we need to apply newtons first law of motion which states that "a body will continue to be at rest or uniform motion except acted upon by an external force greater than the force keeping the body at rest or uniform motion"
given
mass m= 200kg
acceleration a= 25 m/s
we know that
F= ma
F= 200*25
F= 5000 N
Running, swimming, and biking are what type of exercise aerobic or anaerobic
Answer:
aerobic is the correct answer
What is the main unit of measurement used in football?
Answer: It would be yards
Explanation:
Answer:
I suppose you are talking about American football, so the answer would be yards.
Explanation:
The field is measured using yards.
A soccer ball is kicked straight up in the air with an initial velocity of 17 m/s and rises to a height
of 14.7 m before beginning to fall back down. How long (in total) is the soccer ball in the air?
Answer:
3.4 s
Explanation:
Given:
Δy = 0 m
v₀ = 17 m/s
a = -10 m/s²
Find: t
Δy = v₀ t + ½ at²
0 m = (17 m/s) t + ½ (-10 m/s²) t²
0 = 17 m/s − (5 m/s²) t
t = 3.4 s
The US Environmental Protection Agency issues a daily report for pollution levels called the __________.
A.
Pollution Advisory Warning
B.
Air Rating Level
C.
Particulates and Pollution Index
D.
Air Quality Index
Please select the best answer from the choices provided.
A
B
C
D
Answer:
D, Air Quality Index :)
Hope this helped!
P.S. : Can I get brainliest please?
WILL GIVE BRAINLIEST! QUICK PLEASE HELP!!!
In addition to how much force Earth exerts on the object, which features of an object affect its weight?
mass and location of the object shape and location of the object location of the object and how much energy the object has mass of the object and how much energy the object has
Answer:
I am pretty sure the answer is A
Explanation:
I know its not C
I hope this helps and I'm sorry if it does not.
The features of an object which affect its weight are the mass and location which is denoted as option A.
What is Weight?This is defined as the force acting on the object due to gravity and the formula is W = mg where m is mass and g is acceleration due to gravity.
This is why the weight features of an object is affected by its mass and then location.
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what is a synonym for motion
Answer:
there are a lot so imma just say a few movement,moving,shifting,to and from
Explanation:
Hope this helps
A line is represented by one point true or false
Write 3,800 seconds in hours, minutes, and seconds
Explanation:
3,800 seconds in hours is 1.055556
3,800 seconds in minutes is 63.33333
3,000 seconds in seconds is the same.
What is 645 g to kg?
Answer:
0.645 kg
Explanation:
because 1 kg = 1000 g
so 1 g = 1/1000 kg = 0.001 kg
645 g = (645 x 0.001) kg = 0.645 kg
synonym of an applied force
Answer:
Coerce, compel, constrain
Explanation:
If you increase the amount of energy in an
ice cube, what would happen to the ice
cube?
A. It would change color.
B. It would become a liquid.
C. It would decrease in volume.
D. It would get harder.
According to Newton's first law of motion, which force is expected to cause a body to accelerate?
•unbalanced force
•Balanced force
•Weak force
•Strong force
Answer:
Unbalanced force -
Explanation:
Unbalanced force is expected to cause a body to accelerate.
Answer:
Unbalanced force
Explanation:
Unbalanced force is expected to cause acceleration in any body as it's net value is not zero in every direction .
I hope it's helpful
Something that bases conclusions on established authority is Question 1 options: A.pseudoscience B. non-science C.science
Answer:
is the first one right
Explanation:
Answer:
yes
Explanation:
Need help with number 1
