Answer:
hi someone already awnsered this so dont be mad at me awnser is below
awnser: One form has a definite shape, and the other form is soft and flows easily.
Ur ans will be marked as brainliest for sure
U'll get pts too
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PLEASE HEEELLLPPPP What is the difference between a hypothesis and a theory? A hypothesis is a testable statement, and a theory is well-supported explanation. A hypothesis is a theory that has been proven. A hypothesis is a law of nature, and a theory is always true. A hypothesis is an observation that can turn into a theory.
Answer:
A hypothesis is a testable statement, and a theory is well-supported explanation.
To win the game, a place kicker must kick a
football from a point 52 m (56.8672 yd) from
the goal, and the ball must clear the crossbar,
which is 3.05 m high. When kicked, the ball
leaves the ground with a speed of 26 m/s at
an angle of 31.5◦ from the horizontal. The acceleration of gravity is 9.8 m/s2.
By how much vertical distance does the ball clear the crossbar?
Answer in units of m.
Answer:
1.86 m
Explanation:
First, find the time it takes to travel the horizontal distance. Given:
Δx = 52 m
v₀ = 26 m/s cos 31.5° ≈ 22.2 m/s
a = 0 m/s²
Find: t
Δx = v₀ t + ½ at²
52 m = (22.2 m/s) t + ½ (0 m/s²) t²
t = 2.35 s
Next, find the vertical displacement. Given:
v₀ = 26 m/s sin 31.5° ≈ 13.6 m/s
a = -9.8 m/s²
t = 2.35 s
Find: Δy
Δy = v₀ t + ½ at²
Δy = (13.6 m/s) (2.35 s) + ½ (-9.8 m/s²) (2.35 s)²
Δy = 4.91 m
The distance between the ball and the crossbar is:
4.91 m − 3.05 m = 1.86 m
which of the filling is a result of the transfer of energy?
answer: sound
why is it sound???
Explanation:
the speed of sound depends on the particles of the medium of the sound wave is moving through because the particles in the solid and tightly packed together South Wales weekly transfers energy from particle to particle in a solid
LUZUJ ML)
Monique's family is moving to a town where surfing is a popular sport. She has never surfed but is excited to learn. Monique's father suggested
she practice her balance before attempting to surf. Which activity would best help Monique?
Answer:
b. Rollerblading.
Explanation:
Rollerblading involves balances.
Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projectile motion?
A). The paper airplane’s motion is due to horizontal inertia and the vertical pull of gravity.
B). A force other than gravity is acting on the paper airplane.
C). The paper airplane’s motion can be described using only one dimension.
D). A push and a pull are the primary forces acting on the paper airplane.
Explanation:
yes it is the force that is subjected by the force of gravity onlyAnswer:
A. The paper airplane’s motion is due to horizontal inertia and the vertical pull of gravity.
Explanation:
Got it right on edge.
Janon walked 6m to the right, and 3m to the left, and then 4m to the right. What is
displacement? rs
(1 Point)
13 m
3 m
7 m
7 m right
Answer:
7 m
Explanation:
They began walking 6 meters to the right, so +6.
Then 3 meters left so -3,
And then 4 meters to the right again so +4.
4+6-3=7 meters
An airplane flies 250.0 km at 300 m/s. How long does this take?
A soccer ball is kicked horizontally. What is the average speed if its distance is 21.0 m after 4.00 s?
A plane's average speed between two cities is 625 km/hr. If the trip takes 2.5 hours, how far does the plane fly?
Answer: 1,562.5 Km
Explanation: If it takes one hour to travel 625 kilometers, then, in two and a half hours, you should travel 1,562.5 Kilometers because of 625x2.5=1562.5 kilometers
25 POINTS! ANSWER CORRECTLY FOR BRAINLIEST!
Which of these is a type of climate?
A. Foggy
B. Overcast
C. Thunderous
D. Tropical
(I honestly think its foggy but I want other peoples opinions)
Answer:
d. tropical
Explanation:
Tropical climates are characterized by constant high temperatures
Please solve this no.1 for me
I do not want any weird or wrong answer or else I’ll report
If u can’t do this don’t write weird stuffs on the answer side
Answer:
metallic movement when u heat up metal it get bigger
Explanation:
let's say u had metal ball with a metal ring u heat the metal ball up it won't fit in the ring
Which SI units would you use for the following measurements?.
Answer:
Where are the measurements?
Explanation:
We can measure the length of the swimming pool by using the SI unit meter, as the length of the swimming pool comes under the fundamental measurement of the dimension which is measured by the standardized international unit of length.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
There are three additional units and 7 SI basic units in this system of SI units, the base SI units are meter, kilogram, second, kelvin, ampere, candela, and mole.
As given in the problem we have to find how can we measure the length of the swimming pool,
Due to the fact that the length of the swimming pool falls under the category of a dimension that is fundamentally measured using a standardized international unit of length.
Thus, we can measure the length of the swimming pool by using the SI unit meter,
Learn more about the unit of measurement from here,
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Your question seems incomplete the complete question is,
Which SI units would you use for the following measurements?
the length of a swimming pool
If you needed to measure the length of a room, you should use the unit
Answer:
meters, yards or feet
Explanation:
A car travels 90 meters due North in 15 seconds. The car turns around and travels 40 meters due south in 5 seconds. What is the magnitude of the average velocity of the car during this 20-second interval?
Answer:
5m/s
Explanation:
If you do 90-40 (the two distances the problem gave) which will give you 50 meters, and then 15-5 (the two times given) which will give you 10. All you do after that is divide your new found distance with your new time 50/10 and boom chicken soup you got your final answer of 5 m/s :)
We have that The cars displacement is
d=50m
The magnitude of the average velocity is
Avg V=2.5m/s
From the question we are told
A car travels 90 meters due North in 15 seconds. The car turns around and travels 40 meters due south in 5 seconds. What is the magnitude of the average velocity of the car during this 20-second interval
Generally the equation for the Total displacement is mathematically given as
d=initial displacement -final displacement
Therefore
d=90-40
d=50m
Generally the equation for the average velocity is mathematically given as
[tex]Avg V=\frac{m}{s}\\\\Avg V=\frac{50}{20}[/tex]
Avg V=2.5m/s
Therefore
The cars displacement is
d=50m
The magnitude of the average velocity
Avg V=2.5m/s
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A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground
-the acceleration increases
-the acceleration decreases
-the acceleration remains constant *
Answer:
The correct option is;
The acceleration remains constant
Explanation:
The acceleration is due to the force of gravitational attraction between the text book and the Earth
According to Newton's law of gravitation, there is an attractive force between all objects given by the following relation;
F = G×M₁×m₂/r²
Where;
G, M₁, m₂, and r are constant such that we have;
G×M₁/r² = Constant = The acceleraton due to gravity, g
F = g×m₂
So the acceleration of the textbook as it is being attracted by the force of gravity towards the ground (Earth) is remains constant.
Which two options are forms of potential energy
A nuclear energy
B chemical energy
C sound energy
D thermal energy
E electrical energy
Answer:
e and b
Explanation:
Answer:
D,E
Explanation:
thats what I would say because PE is the energy stored in an object
234 cm …. ________________ meters
Answer:
the answer is 234 cm is 2.34 meters
the acceleration due to gravity on earth is 9.8 m/s^2. The force acting on an object on earth is 22 newtons. What is the mass of this object on earth?
Explanation:
solution ,
[tex]a = 9.8m \div {s}^{2} [/tex]
[tex]f = 22 \: newton[/tex]
[tex] M= \: ?[/tex]
Now,
f=Ma
or,
f/a=M
or,
22/9.8=M
or,
2•24=M
or,
M=2.24kg
Is sound potential or kinetic energy
Answer:
Sound energy (that is, mechanical vibrational waves passing through an elastic medium) is a combination of kinetic and potential energies. As the wave compresses the medium (storing elastic potential energy) the medium comes to rest (no motion so no kinetic energy).
Explanation:
Hope this helps :D
An electric car is being driven through a town at 22 m/s. The kinetic energy of the car is 222640 J. Calculate the mass of the car
Answer:
920 kg
Explanation:
[tex]kinetic \: energy = 222640j \\ \frac{1}{2} mv {}^{2} = 222640 \\ \frac{1}{2} m(22) {}^{2} = 222640 \\ m = 920kg[/tex]
Sal sprinted 40 m to the right in 5.5s what is his average velocity
Answer: 7.27 m/s
Explanation:
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!
Calculate the distance the gecko covers when sprinting from rest to 2 m/s in a time of 1.5 s.
Answer:
1.5 m
Explanation:
a = v/t
a = 2/1,5 = 4/3
x = 1/2 a t² + vt + x
x = 1/2 × 4/3 × 9/4 = 3/2 = 1.5 m
A car slows from 90mi/he to 55mi/hr when it sees the police what's the cars acceleration
A group of students prepare for a robotic competition and build a robot that can launch large spheres of mass M in the horizontal direction with variable speed and from a variable vertical position and a fixed horizontal position x=0.
The robot is calibrated by adjusting the speed at which the sphere is launched and the height of the robot’s sphere launcher. Depending on where the spheres land on the ground, students earn points based on the accuracy of the robot. The robot is calibrated so that when the spheres are launched from a vertical position y=H and speed v0, they consistently land on the ground on a target that is at a position x=D. Positive directions for vector quantities are indicated in the figure.
When the students arrive at the competition, it is determined that the height of the sphere launcher can no longer be adjusted due to a mechanical malfunction. Therefore, the spheres must be launched at a vertical position of y=H2. However, the spheres may be launched at speed v0 or 2v0.
Question: In a clear response that may also contain diagrams and/or equations, describe which speed, v0 or 2v0, the students should launch the sphere at so that they earn the maximum number of points in the competition.
Answer:
[tex]V_0[/tex]
Explanation:
Given that, the range covered by the sphere, [tex]M[/tex], when released by the robot from the height, [tex]H[/tex], with the horizontal speed [tex]V_0[/tex] is [tex]D[/tex] as shown in the figure.
The initial velocity in the vertical direction is [tex]0[/tex].
Let [tex]g[/tex] be the acceleration due to gravity, which always acts vertically downwards, so, it will not change the horizontal direction of the speed, i.e. [tex]V_0[/tex] will remain constant throughout the projectile motion.
So, if the time of flight is [tex]t[/tex], then
[tex]D=V_0t\; \cdots (i)[/tex]
Now, from the equation of motion
[tex]s=ut+\frac 1 2 at^2\;\cdots (ii)[/tex]
Where [tex]s[/tex] is the displacement is the direction of force, [tex]u[/tex] is the initial velocity, [tex]a[/tex] is the constant acceleration and [tex]t[/tex] is time.
Here, [tex]s= -H, u=0,[/tex] and [tex]a=-g[/tex] (negative sign is for taking the sigh convention positive in [tex]+y[/tex] direction as shown in the figure.)
So, from equation (ii),
[tex]-H=0\times t +\frac 1 2 (-g)t^2[/tex]
[tex]\Rightarrow H=\frac 1 2 gt^2[/tex]
[tex]\Rightarrow t=\sqrt {\frac {2H}{g}}\;\cdots (iii)[/tex]
Similarly, for the launched height [tex]2H[/tex], the new time of flight, [tex]t'[/tex], is
[tex]t'=\sqrt {\frac {4H}{g}}[/tex]
From equation (iii), we have
[tex]\Rightarrow t'=\sqrt 2 t\;\cdots (iv)[/tex]
Now, the spheres may be launched at speed [tex]V_0[/tex] or [tex]2V_0[/tex].
Let, the distance covered in the [tex]x-[/tex]direction be [tex]D_1[/tex] for [tex]V_0[/tex] and [tex]D_2[/tex] for [tex]2V_0[/tex], we have
[tex]D_1=V_0t'[/tex]
[tex]D_1=V_0\times \sqrt 2 t[/tex] [from equation (iv)]
[tex]\Rightarrow D_1=\sqrt 2 D[/tex] [from equation (i)]
[tex]\Rightarrow D_1=1.41 D[/tex] (approximately)
This is in the [tex]3[/tex] points range as given in the figure.
Similarly, [tex]D_2=2V_0t'[/tex]
[tex]D_2=2V_0\times \sqrt 2 t[/tex] [from equation (iv)]
[tex]\Rightarrow D_2=2\sqrt 2 D[/tex] [from equation (i)]
[tex]\Rightarrow D_2=2.82 D[/tex] (approximately)
This is out of range, so there is no point for [tex]2V_0[/tex].
Hence, students must choose the speed [tex]V_0[/tex] to launch the sphere to get the maximum number of points.
Free fall motion is motion in which the only force acting on the body is gravity
The student should launch the sphere at 2·v₀, for the sphere will land at approximately 1.41·D, which is in the 3 point zone
The given parameter are;
The distance covered by the sphere when launched at height, H = D
The velocity with which the ball reaches D = v₀
The current available height of launcher= H/2
The available velocities = v₀, and 2·v₀
Solution:
From H = u·t + (1/2)·g·t², where, initial velocity of the vertical motion of the ball, u = 0 we have;
H = (1/2)·g·t²
∴ The time it takes the ball to drop from H, t = √(2·H/g)
The distance, D = v₀ × √(2·H/g)
When the height is H/2, we get;
t = √(2·H/(2·g)) = √(H/g)
The distance covered, D₁ = v₀ × √(H/g)
Therefore, D = (√2) × v₀ × √(H/g) = (√(2))·D₁
D₁ = D/(√2) ≈ 0.71·D
D₁ ≈ 0.71·D
At speed 2·v₀, we have;
D₂ = 2·v₀ × √(H/g) = √2 × v2 × v₀ × √(H/g) = √2 × v₀ × √(2·H/g) = √2·D₁ ≈ 1.41·D
D₂ ≈ 1.41·D
The 2 point zone = D/2 < x < D = 0.5·D < x < D (Position D₁ ≈ 0.71·D is located here)
The 3 Point Zone = D < x < 3·D/2 = D < x < 1.5·D (Position D₂ ≈ 1.41·D is located here)
Given that at D₂, the ball lands in the 3 Point Zone, the student should launch the sphere at the speed, 2·v₀, so that the ball will land at D₂ ≈ 1.41·D, which is in the 3 Point Zone
Learn more about free fall motion here:
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PLEASE ANSWER THESE I NEED HELP!!!
Which properties are characteristic of metalliods?
1. high electrical conductivity and a high melting point
2. low electrical conductivity and a low melting point
3. intermediate conductivity and a high melting point
4. intermediate conductivity and a low melting point
Answer:
1 high electrical conductivity and high melting point
What Happens to Energy during Phase Changes?
Energy transfer, and transformation.
It is when energy changes from one form to another.
Hope This Helps, Good Luck!
HEY CAN ANYONE PLS PLS PLS HELP ME OUT IN DIS I AM STRUGGLING TOO MUCH
=======================================================
Work Shown:
r = radius = 1.045 cm
h = height = 30.48 cm
pi = 3.141 approximately
V = volume of cylinder
V = pi*r^2*h
V = 3.141*(1.045)^2*30.48
V = 104.547940002
V = 104.5 cubic cm
Name and describe the physical and compositional layers into which earth is divided
Answer:
Explanation:
There are three compositional layers into which the earth is divided into, these are
The core.
The mantle.
The crust.
There are five physical layers into which the earth is divided, these are
The Lithosphere, 40 - 140 km into the earth
The Mesosphere, 50 - 100 km above the earth.
The Asthenosphere, below the lithosphere, 80 - 200 km into the earth.
The Inner Core.
The Outer Core, 2890 km below the earth
PLEASE HELP ME I APPRECIATE IT WILL GIVE BRAINLIEST
(Write a paragraph) What are the similarities and differences between these volcanoes:
Composite Volcano, Lava Dome, Shield Volcano, and Cinder Cone.
Answer:
Explanation:
Composite volcanoes, also called stratovolcanoes, are cone-shaped volcanoes built from many layers of lava, pumice, ash, and tephra. A lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. A shield volcano is a type of volcano usually composed almost entirely of fluid lava flows. It is named for its low profile, resembling a warrior's shield lying on the ground. A cinder cone is a steep conical hill of loose pyroclastic fragments, such as either volcanic clinkers, volcanic ash, or cinder that has been built around a volcanic vent.
