Answer:
b
Explanation:
the different ways the molecules are arranged in the atom creates differ states of matter and different appearences.
In Eric's planning to take photos of the Plato Crater, Copernicus Crater and Rupes Cauchy Crater, he is trying to
figure out if the craters are always facing the earth. He knows that the moon spins on its axis. Doesn't that mean the
craters will be facing away from the earth at some point in the moon/lunar cycle as the moon orbits the earth?
Are the carters always facing the earth as the moon orbits the earth?
Please help!!!
Answer:
Yes, the carters are always facing the Earth as the moon orbits.
Explanation:
A 2 kg RC car is driving at a speed of 4 m/s. The brakes are hit from the controller and the car slows down to a speed of 2 m/s. What is the work done by friction? *
Answer:
the work done by friction is 12 J.
Explanation:
Given;
mass of the car, m = 2 kg
initial speed of the car, u = 4 m/s
final speed of the car, v = 2 m/s
The work done by friction is equal to change in kinetic energy of the car,
W = ΔK.E
W = ¹/₂m(v² - u²)
W = ¹/₂ x 2 (2² - 4²)
W = -12 J (the negative sign indicates that it is a wasted energy)
Therefore, the work done by friction is 12 J.
An unknown substance was observed to have the following properties: colorless liquid that feels slippery, pH of 8.5, turns red litmus to blue. Based on these properties, what is the best classification of this substance?
acid
base
element
salt
Answer:
It is a base
Explanation:
Because
Answer:it’s a base
Explanation: this is because the bases have a very bitter taste but a very slippery feel at the same time leading to a substance with a ph of 8.5 and the red turning to blue so this is a base
If a CFOC was launched and travels 65 meters and is in the air for 3 seconds, what is the launch velocity and angle?
Answer:
Lauch velocity (u) = 26.15 m/s
Lauch Angle (θ) = 35°
Explanation:
From the question given above, the following data were obtained:
Range (R) = 65 m
Time of flight (T) = 3 s
Acceleration due to gravity (g) = 10 m/s²
Lauch velocity (u) =?
Lauch Angle (θ) =?
R = u²Sin2θ /g
65 = u² × Sin2θ /10
Recall:
Sin2θ = 2SinθCosθ
65 = u² × 2SinθCosθ / 10
65 = u² × SinθCosθ / 5
Cross multiply
65 × 5 = u² × SinθCosθ
325 = u² × SinθCosθ .....(1)
T = 2uSinθ / g
3 = 2uSinθ / 10
3 = uSinθ / 5
Cross multiply
3 × 5 = uSinθ
15 = u × Sinθ
Divide both side by Sinθ
u = 15 / Sinθ....... (2)
Substitute the value of u in equation (2) into equation (1)
325 = u² × SinθCosθ
u = 15 / Sinθ
325 = (15 / Sinθ)² × SinθCosθ
325 = 225 / Sin²θ × SinθCosθ
325 = 225 × SinθCosθ / Sin²θ
325 = 225 × Cosθ / Sinθ
Cross multiply
325 × Sineθ = 225 × Cosθ
Divide both side by Cosθ
325 × Sineθ / Cosθ = 225
Divide both side by 325
Sineθ / Cosθ = 225 / 325
Sineθ / Cosθ = 0.6923
Recall:
Sineθ / Cosθ = Tanθ
Tanθ = 0.6923
Take the inverse of Tan
θ = Tan¯¹ 0.6923
θ = 35°
Substitute the value of θ into equation (2) to obtain the value of u.
u = 15 / Sinθ
θ = 35°
u = 15 / Sin 35
u = 15 / 0.5736
u = 26.15 m/s
Summary:
Lauch velocity (u) = 26.15 m/s
Lauch Angle (θ) = 35°
what does x repressent on a motion map?
Answer:
The x represents the reference point on a motion map
Explanation:
-Motion maps are another way to represent the motion of an object. (other representations are graphical and mathematical models)
Answer:
The x represents the reference point on a motion map. Explanation; -Motion maps are another way to represent the motion of an object. (other representations are graphical and mathematical models).
Explanation:
Which of the following units would need to be converted before being used for a calculation?
a. m
b. cm
c. 0 ks
d. kg/m3
Explanation:
The fundamental units are such types of units that are not dependent upon any other units. In this problem, we need to find the units that need to be convert before being used for a calculation.
Option (1) m
m stands for meter. It is one of the fundamental unit. It should remains the same.
Option (2) cm
cm stands for centimeter. If a unit is in cm, then it must be converted to meter using the conversion i.e. [tex]1\ cm=100\ m[/tex].
Option (3) ks
ks stands for kilo second. If a unit is in ks, it must be converted to second (s) using the conversion i.e. [tex]1\ ks=1000\ s[/tex].
Option (4) kg/m³
The SIT unit of density is kg/m³. It is unit that is derived from the fundamental unit. It should remains the same.
Answer:
So, the options that need to be converted before being used for a calculation are (b) and (c).
Reference:
brainly.com/question/12750330
5. This break-dancer's speed is not changing as he spins on his head, but he is
accelerating. Explain how this could be.
The direction of the break dancer is always changing hence we can say that the break dancer is accelerating.
The term acceleration means change of velocity with time. It refers to the time taken for the velocity of a body to change in a specified direction. Recall that velocity takes direction into account.
The direction of the break dancer is always changing hence we can say that the break dancer is accelerating since his direction is changing even though the speed is constant.
Learn more about acceleration: https://brainly.com/question/2437624?
The speed of a moving bullet can be deter-
mined by allowing the bullet to pass through
two rotating paper disks mounted a distance
61 cm apart on the same axle. From the
angular displacement 14° of the two bullet
holes in the disks and the rotational speed
1436 rev/min of the disks, we can determine
the speed of the bullet.
Answer:
v = 381 m/s
Explanation:
Linear Speed
The linear speed of the bullet is calculated by the formula:
[tex]\displaystyle v=\frac{x}{t}[/tex]
Where:
x = Distance traveled
t = Time needed to travel x
We are given the distance the bullet travels x=61 cm = 0.61 m. We need to determine the time the bullet took to make the holes between the two disks.
The formula for the angular speed of a rotating object is:
[tex]\displaystyle \omega=\frac{\theta}{t}[/tex]
Where θ is the angular displacement and t is the time. Solving for t:
[tex]\displaystyle t=\frac{\theta}{\omega}[/tex]
The angular displacement is θ=14°. Converting to radians:
[tex]\theta=14*\pi/180=0.2443\ rad[/tex]
The angular speed is w=1436 rev/min. Converting to rad/s:
[tex]\omega = 1436*2\pi/60=150.3776\ rad/s[/tex]
Thus the time is:
[tex]\displaystyle t=\frac{0.2443\ rad}{150.3776\ rad/s}[/tex]
t = 0.0016 s
Thus the speed of the bullet is:
[tex]\displaystyle v=\frac{0.61}{0.0016}[/tex]
v = 381 m/s
Juan amd kym have four samples of matter. They are observing and describing the properties of these samples. Which property will beat provide evidence that the samples are solids rather than liquids?
Answer: The property that will best provide evidence that the samples are solid includes:
--> if the substance has a definite shape,
-->if the substance has a definite volume
--> if it's tightly packed.
Explanation:
According to the kinetic theory of matter, every substance consist of very large number of very small particles called molecules. These molecules, which are made up of atoms that are the smallest particles of a substance that can exist in a free state.
Matter can exist in the following states:
--> Solid state
--> liquid state or
--> Gaseous state.
The general property of a substance that is in gaseous state includes:
--> Definite shape: A substance can be grouped as a solid if it's shape is fixed that is, it doesn't depend on the shape of other materials.
--> Definite volume: A substance can be grouped as a solid if it occupies its own shape. This is due to the force of cohesion among its molecules.
--> Tightly packed: A substance can be grouped as solid if the molecular movements of the particles are negligible.
From the samples under observation by Juan and kym, if the sample that possesses the above described qualities, it is a solid rather than liquid or gas.
Label the parts of this transverse wave,
A
B
C
If you climb two sets of stairs each with a height of 4 meters how much work will you do compared to climbing just one set of stairs that is 4 meters
Answer:
You will do twice the work of climbing 1 stair.
Explanation:
To obtain the answer to the question, we shall determine the work done on each case. This is illustrated below:
Case 1 ( climbing 2 stairs):
Mass (m) = m
One stair = 4 m
Height (h) = 2 × 4 = 8 m
Acceleration due to gravity (g) = 10 m/s²
Workdone 1 (Wd₁) =?
Wd₁ = mgh
Wd₁ = m × 10 × 8
Wd₁ = 80 × m
Case 2 (Climbing 1 stair)
Mass (m) = m
Height (h) = 4 m
Acceleration due to gravity (g) = 10 m/s²
Workdone 2 (Wd₂) =?
Wd₂ = mgh
Wd₂ = m × 10 × 4
Wd₂ = 40 × m
Now comparing the Workdone in both case:
Workdone 1 (Wd₁) = 80 × m
Workdone 2 (Wd₂) = 40 × m
Wd₁ / Wd₂ = 80 × m / 40 × m
Wd₁ / Wd₂ = 2
Cross multiply
Wd₁ = 2 × Wd₂
Thus, we can see that the Workdone in climbing 2 stairs is twice the Workdone in climbing 1 stair.
Therefore, you will do twice the work of climbing 1 stair.
an electrical circuit in which the value of resistance is equal to (6 ohms) and the intensity of the current passing through it is (3 amps) the voltage difference between its two is equal to?
Answer:
Voltage difference V = 18 volt
Explanation:
Given:
Resistance R = 6 ohms
Current charge I = 3 amps
Find:
Voltage difference V
Computation:
Voltage difference V = [Current charge][Resistance]
Voltage difference V = 6 x 3
Voltage difference V = 18 volt
PLEASE HELP WITH GIVE BRAINLIEST!!! ❤️
Think about a book resting on a table. The weight of the book pushes down on the table with a force of 2 N. How much force does the table put on the book?
Karen bought 99100 kids and fuced 4 of them how many of them have white stuffin there
body know
Answer:
all
Explanation:
i was in a question kinda like this and I think it's all
What is the change in gravitational potential energy of the apple if it falls the amount shown? Estimate g to 9.81m/s2 and keep 3 significant figures.
Answer: 1.72J
Just figured this out a while ago
What is the acceleration of a car going 50 mph that slows down to rest over 10 seconds?
Answer:
If the velocity is constant, then there is no acceleration. That is, the value of the acceleration is 0.
Explanation:
Define What is
Newton's third law of
motion?
Answer:
I had that on 6th grade here u go
His third law states that for every action in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.
Someone please help!!
Answer:
Infared light
Explanation:
What is the mechanical advantage of the following pulley? The pulley has six supporting
ropes but the force end is down.
Answer:
In a pulley, the ideal mechanical advantage is equal to the number of rope segments pulling up on the object. The more rope segments that are helping to do the lifting work, the less force that is needed for the job.
A charged acrylic rod is brought close to a pith ball. The pith ball attracted to the rod, makes contact, and is then repelled by the red. This an example of
A) grounding
B) static discharge
C) induction
D) conduction
E) none of the above
Answer:
It is induction
How do molecules at warm temperatures differ from molecules at cool temperatures? Question 1 options: At warm temperatures, molecules move around more. At warm temperatures, molecules grow in size. At warm temperatures, molecules exchange electrons more easily. At warm temperatures, moleucles combine with each other more easily.
Answer:
A. At warm tempetures, molecules move around more.
Explanation:
I'm at k12 and I just took the test got it right. Physical Science: Unit 2 Test
Answer:
At warm temperatures, molecules move around more.
plz mark me as brainliest.
108kmh-1 = _____ ms-1
Answer:
30 ms⁻¹
Explanation:
Given:
108kmh⁻¹
Find:
Change into ms⁻¹
Computation:
⇒ 1 km = 1,000 m
⇒ 1 hour = 60 x 60 = 3,600 sec
So,
⇒ 108[1,000/3,600]
30 ms⁻¹
Please help
What is the magnitude of the normal force on the bag?
Answer in units of N.
Answer:
41.576 N
Explanation:
Resolving force in the inclined plane in the x and y directions gives us;
F_x = mg sin θ
F_y = mg cos θ
Thus;
F_x = 4.8 × 9.81 × sin 28
F_x = 22.106 N
F_y = 4.8 × 9.81 × cos 28
F_y = 41.576 N
We can use Newton's second law to find the normal force.. Thus;
N - F_y = 0.
Where N is normal force;
N = 41.576 N
How can being near a large body of water affect the climate of a region? PLZ help me!!!
There would be more hurricanes because hurricanes from by water.
More rain because you would get more precipitation.
Higher flooding if a storm comes through.
can anyone tell me what's the base quantities for Force, Pressure and Charge?
Force, pressure, and charge are all what are called derived units. They come from algebraic combinations of base units, measures of things like length, time, temperature, mass, and current. Speed, for instance, is a derived unit, since it's a combination of length and time in the form [speed] = [length] / [time] (miles per hour, meters per second, etc.)
Force is defined with Newton's equation F = ma, where m is an object's mass and a is its acceleration. It's unit is kg·m/s², which scientists have called a Newton. (Example: They used 9 Newtons of force)
Pressure is force applied over an area, defined by the equation P = F/A. We can derive its from Newtons to get a unit of N/m², a unit scientists call the Pascal. (Example: Applying 100 Pascals of pressure)
Finally, charge is given by the equation Q = It, where I is the current flowing through an object and t is how long that current flows through. It has a unit of A·s (ampere-seconds), but scientist call this unit a Coulomb. (Example: 20 Coulombs of charge)
A force of 20 N is applied from left to right on a block with a mass of 5.0 kilograms. What is the acceleration of the block? Select one: 25 m/s2 to the right. 20 m/s2 to the right. 100 m/s2 to the right. 4 m/s2 to the right.
On April 15 1912 the luxury cruise liner titanic sank after running into an iceberg. What was the cruise liners speed when it collided with the iceberg if it has a mass of 4.23 x 10 squared 8 kg ship and a moment of 4.9 x 10 squared 9 kg.m/s
Difference between hydraulic brake and hydraulic lift
Answer:
The hydraulic lift and the hydraulic brake are virtually the same machine. Both of them use some means of applying pressure to a hydraulic fluid that forces a piston or pistons elsewhere to move outward with greater force. There are only two differences between the hydraulic lift and the hydraulic brake. One is that all the push is delivered by one cylinder in a lift and by either two or four cylinders in a brake system. The other difference is that in a hydraulic lift the pump moves the lift piston out in a series of movements while in a brake system the brake pedal moves the brake pistons out in one short movement.
As fluid is forced into the lift cylinder it forces the lift piston upward. The lift cylinder is a lot wider than the pump cylinder. This means that the area of the lift piston is a lot greater than the area of the pump piston. Because Pascal's Principle guarantees that the pressure in a fluid is the same everywhere and the area that pressure is applied over is greater at the lift cylinder, the force applied by the lift cylinder must be greater. The hydraulic lift takes the long low-force motions of the pump piston and converts then into short high-force motions of the lift cylinder.
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Hydraulic brake and Hydraulic lift uses fluid to transmit power from one end to another.
hydraulic brake stops motion and hydraulic lift create motion
The major difference is hydraulic brake used fluid to stop motion, while the hydraulic lift used fluid to create/cause motion that is transport items/persons from one end to another.
Learn more about hydraulic brake and hydraulic lift:
https://brainly.com/question/1747883
2. An object is moving in the positive x-direction while a net force directed along the x-axis is exerted on
the object. The figure shows the force as a function of position. What is the net work done on the object
over the distance shown?
F
FO
o
2d
3d
-Fof
A) Fid
B) Ford
C) 2Fd
D) 4F,
Answer:
A. F₀d
Explanation:
The formula for work done on an object is given by:
w= f*d
Work done towards the positive direction is given by ;
Work done under the trapezoid shaped area:
1/2 {a+b} h = 1/2 { 2d + d } F₀
W=3/2dF₀
Work done on the triangle shaped part
W= 1/2 * b * h
W= 1/2 * d * -F₀ = -1/2dF₀
The net work done :
3/2dF₀ -1/2dF₀ = 1dF₀
difference between MKS system and CGS system
Answer:
MKS stands for Meter, Kilogram and second. In this system of unit mass is given in Kilogram, length in meter and time in second. ... CGS system stands for Centimeter- Gram- Second system. In CGS system, length is measured in centimeters mass is measured in grams and time is in seconds.
