Answer:
solid
Explanation:
because the molecule of solid is farest than gas
a 15-kg block is on a frictionless ramp that is inclined at 20° above the horizontal. it is connected by a very light string over an ideal pulley at the top edge of the ramp to a hanging 19-kg block, as shown in the figure. the string pulls on the 15-kg block parallel to the surface of the ramp. find the magnitude of the acceleration of the 19-kg block after the system is gently released?
Hi there!
Since the string is light and there is no friction in the pulley, the acceleration of the system is equal to the acceleration of both blocks.
We can begin by summing the forces of each block:
Block on incline:
- Force of gravity (in the negative direction away from the acceleration)
- Force of Tension
∑F = -M₁gsinФ + T
Block hanging:
- Force of gravity (Positive, in direction of acceleration)
- Force of Tension (Negative, opposite from acceleration)
∑F = M₂g - T
Sum both of these net forces for each block:
∑Fт = -M₁gsinФ + T - T + M₂g
∑Fт = -M₁gsinФ + M₂g
Divide by the mass to solve for acceleration:
[tex]a = \frac{-M_1gsin\theta+M_2g}{M_1+M_2}[/tex]
Plug in the given values:
[tex]a = \frac{-(15)(9.81)(sin20)+19(9.81)}{15+19} = 4.002 m/s^2[/tex]
The magnitude of the acceleration of the 19-kg block is 4.0 m/[tex]s^{2}[/tex].
The 15-kg block is accelerating down the ramp, and the 19-kg block is accelerating up. The string connecting the two blocks is taut, so it must be applying a force to both blocks. The force of the string on the 15-kg block is equal to the force of the string on the 19-kg block.
Let's call the force of the string on the 15-kg block T. We can use Newton's second law to write two equations for the acceleration of the two blocks:
For the 15-kg block: T - mg sin(θ) = 15a
For the 19-kg block: T = 19a
where:
m is the mass of the block
g is the acceleration due to gravity
θ is the angle of the ramp
a is the acceleration of the block
Plugging the second equation into the first equation, we get:
19a - mg sin(θ) = 15a
Solving for a, we get:
a = (mg sin(θ)) / (4m)
= (15 kg * 9.8 m/[tex]s^{2}[/tex] * sin(20°)) / (4 * 15 kg)
= 4.0 m/[tex]s^{2}[/tex]
Therefore, the magnitude of the acceleration of the 19-kg block is 4.0 m/[tex]s^{2}[/tex].
To know more about acceleration here
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#SPJ3
40 meters divided by 5
Answer:
8 meters
Explanation:
40/ 5 = 8
What is the number of significant figures in 4.07 × 1016?
Hello!
4.07x10^16
The number of significant figures is [tex]3[/tex], because all the zeroes are not significant.
Hope this helps!
~Just a joyful teen
[tex]GraceRosalia[/tex]
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The required number is :
[tex]4.14 \times 10 {}^{3} [/tex]
The number of significant figures = 3
Refer to attachment for solution ~
Which of these is an example of weathering?
A
a landslide moving debris down the side of a mountain
B
a large rock cracking into many smaller pieces around a tree root
C
wind blowing sand from one side of a beach to the other
D
glaciers slowly carrying bits of rock along the ground
Answer: D
Explanation: The weather is making the Bits of rock and the glaciers are moving it so that is weathering.
Why is the magnetic force considered to be an action-at-a-distance force?
a
Magnets must be far apart in order to exert a force.
b
Magnets do not have to touch each other to experience a force.
c
Magnets push each other apart to increase the distance between them.
d
Magnets must be large in size in order to exert a force that is strong enough to notice.
CAN YOU BRAINLEST ME
An object initially traveling at 20 Meters per second west accelerates uniformly at 4.0 meters per second squared east for 2.0 seconds The displacement of the object during these 2.0 seconds is
The displacement of the object during these 2.0seconds is; 32 meters west
According to the question;
Initial velocity, u = 20m/sAcceleration, a = 4m/s²Time, t = 2sDisplacement, S = ?However, since the acceleration of the object is in the opposite direction; the equation of motion that can be used to find the Displacement is;
S = ut - at²/2By substituting values as given in the question; we have;
S = (20 × 2) - (4 × 2²)/2S = 40 - 8S = 32m west
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how long does it take for the moon to rotate around the earth
Answer:
27,32 dia
Explanation:
NEED HELP!!!! 10 POINTS!!!!
Oxygen helps all aspects of the body function better.
A.
True
B.
False
PLEASE NO LINKS
Answer: True
Explanation: Oxygen is important to every cell in your body. Without it, your cells can't make energy, and their metabolism is less effective.
Explanation:
true. your red blood cells need energy to process through your blood and body. your lungs need oxygen to breathe. the oxygen travels through your lungs into your blood to the organs and tissues which all help the body function
Add vectors 7.5 m/s and the vector -2.9 m/s
How To:
How do you add two vectors?
To add or subtract two vectors, add or subtract the corresponding components. Let →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is called the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .
during low-intensity activity, your body obtains most of its energy from
For which type(s) of signals does noise alter the original information?
A) analog only
B) digital only
C) both analog and digital
D) neither analog nor digital
a car travels east with a velocity of 80 km/h for 90 minutes how far did the car travel (show your work)
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Given terms :
velocity (v) = 80 km/htime (t) = 90 minutes = 1.5 hourAs we know, Distance covered is equal to :
[tex]velocity \times time[/tex][tex]80 \times 1.5[/tex][tex]120 \: \: km[/tex]Drag each tile to the correct location.
Based on the following statements, determine whether the relative age or absolute age for the events are known:
• Harrison was born 7 years ago, but his sister Meredith was born long before then.
The tree in Jasmine's yard has been there longer than her house has, and her house was built 85 years ago.
The triceratops went extinct 65 million years ago, long after the stegosaurus went extinct.
Relative Age
Absolute Age
Harrison's
birth
Meredith's
. birth
the planting of
Jasmine's tree
the building of
Jasmine's
the extinction of the
triceratops
the extinction of the
stegosaurus
house
Answer:
Relative: meredith's birth, the planting of jasmine's tree, and the extinction of the stegosaurus
Absolute: harrison's birth, the building of jasmine house, and the extinction of the triceratops
Explanation: plato
Measurements of the height of various plants in an experiment are called
Answer:
ExplaMeasurements of the height of various plants in an experiment are called (Data).nation:
.) Explain what an indepent variable is
Explain what an
dependent variable
Answer:
An independent variable is a variable that stands alone and isn't changed by the other variables you are trying to measure.
A dependent variable is something that depends on other factors.
Imagine that you design running shoes for a living. Which biometric would be most useful?
A.
the average weight of a runner
B.
the number of runners in a popular urban area
C.
the points of impact when the foot hits the ground
D.
the distance that beginning runners attempt to finish
When designing running shoes, the most useful bio metric is the average weight of a runner.
Usually, running shoes are designed with the particular concerns of the user in mind. A very useful biometric when designing running shoes is the average weight of the runner.
This is important because a heavier runner, for instance, will hit the ground with a greater force leading to greater impact. It is necessary that these runner have shoes that help to cushion this higher impact.
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Mr lyall was expecting to hear a (1)______ with a (2)_____sound and instead, the student was playing a (3)_______ and a (4)_______.
Choice 1:
lower frequency
higher frequency
Choice 2:
Lower amplitude
higher amplitude
Choice 3:
Lower frequency
higher frequency
Choice 4:
lower amplitude
higher amplitude
Answer:
(1)lower frequency
(2)lower amplitude
(3)higher frequency
(4)higher amplitude
Mr. lyall wanter to hear a music (lower frequency and lower amplitude) but, the student was playing a noise (higher frequency and higher amplitude)
Explanation:
brainliest plz
Identifying What are five things
that must be true in order for
a substance to be considered a
mineral?
Answer:
1. Naturally occuring
2. Solid
3. Inorganic
4. Crystalline
5. Specific Chemical Compostion
Explanation:
Minerals are inorganic, crystalline solids that occur during biogeochemical processes in nature like in cooled lava or evaporated sea water. Minerals are not rocks, but are actually the components that make up rocks. Though they vary in color and shape, each mineral has a distinct chemical composition.
1. Minerals are formed by natural geological processes. Most minerals form from molten lava, sea evaporation or hot liquids in caves or cracks. Laboratory-generated minerals like synthetic gems made for commercial purposes are not considered actual minerals.
2. Though minerals vary in shape, color, luster (the way a mineral reflects light) and hardness, all minerals are a solid at a given temperature. If a substance is not in its solid state, it is not currently a mineral. For example, ice is a mineral, but liquid water is not. The Mohr scale, rates a minerals hardness from one to 10, 10 being the hardest. Diamond is the hardest mineral. Talc is a very soft mineral with a Mohr rating of one.
3. Minerals are wholly inanimate, inorganic compounds. But there are exceptions to this qualifier. There are rare organic substances with definitive chemical compositions that are labeled as “organic minerals." The most famous of this oxymoronic exception is whewellite. Whewellite is a component of kidney stones and coal deposits.
4. Most minerals will grow into a crystal shape, space permitting. Mineral deposits are often small because there is usually a variety of minerals in the same vicinity competing for the same room to grow. A mineral’s crystalline structure determines its hardness, cleavage (how it breaks) and color. There are six different crystal shapes: cubic, tetragonal, orthohombic, hexagonal, monoclinic and triclinic.
5. A mineral is defined by its chemical composition. A rock, on the other hand, does not have a specific chemical composition because it is a composite of a variety of minerals. Minerals are classified based on their anionic group. The major mineral groups are native elements, sulfides, sulfosalts, oxides and hydroxides, halides, carbonates, nitrates, borates, sulfates, phosphates and silicates. Silica is abundant in the Earth’s crust, so silicates are the most common group of mineral.
**WRITE SHORT ANSWER**
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Ans =
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES
Ans =
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID
Ans =
Answer:
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Advantage: Alcohol has a high expansivity.
Disadvantage: Alcohol is not opaque, this may give wrong temperature readings.
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES :
Answer: Solids have stronger intetmolecular forces of attraction than gases.
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID :
Answer: Decreasing the volume of the container containing the liquid. This will increase vapour pressure as well the rate of evaporation .
[tex].[/tex]
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Advantage: Alcohol has a high expansivity.
Disadvantage: Alcohol is not opaque, this may give wrong temperature readings.
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES :
Answer: Solids have stronger intetmolecular forces of attraction than gases.
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID :
Answer: Decreasing the volume of the container containing the liquid. This will increase vapour pressure as well the rate of evaporation .
Explain why it is advisable to charge a car battery with small current over a long period of time than high current within a short time
Answer:
Minimize the heat
Explanation:
heat = square of current X R X t
so as I decreases heat decreases
For your muscles to get stronger, or your body to get fit, you must work harder when exercising than when you are at rest.
Question 2 options:
Overload
Specificity
Progression
Regularity
Answer:
Overload
Explanation:
2. Keith took a cube and measured the mass and volume of a
cube. He discovered the mass to be 36g and the volume to be
6 cm3. What is the density of the cube?
Answer:
6 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 36 g
volume = 6 cm³
We have
[tex]density = \frac{36}{6} = 6 \\ [/tex]
We have the final answer as
6 g/cm³Hope this helps you
A gyroscope is a wheel or disk that spins rapidly around two or more axes. Question options: True False
the answer is false
Answer: false
Explanation:
True or false? Electrons can move, but positive charges can't.True or false? Electrons can move, but positive charges can't.
Answer:
true
Explanatio
Damage to the thalamus would be least likely to affect our
This can cause sensory problems, but it can also lead to behavioral and cognitive changes.
(hope this helps you) :)
3. A rescue plane drops a package to a stranded party of explorers. The plane is traveling horizontally at a velocity of
100.0 m/s at a height of 50.0 m above the ground.
a. How long will it take for the package to hit the ground?
Hi there!
For this part, we can disregard the horizontal velocity because horizontal and vertical motion are INDEPENDENT.
We can used the simplified equation to solve for time:
[tex]t = \sqrt{\frac{2h}{g}}[/tex]
Where:
h = height
g = acceleration due to gravity (assume g = 10 m/s²)
Plug in given values:
[tex]t = \sqrt{\frac{2(50)}{10}} = \sqrt{10}[/tex]
t ≈3.162 sec
A student wants to use a simple machine to remove a bottle cap.
What is the best simple machine for this task?
a. inclined plane
b. pulley
c. lever
d. screw
Answer:
inclined plane
is the answer::::::)))
Answer:
d.
Explanation:
screw
An inclined plane wrapped around a cylinder or cone. a conmon use of the screw is to hold objects together, examples include a jar lid and wood screw. A compound machine is s combination of two or more simple machines
3 a There is a thin layer of water between the blade and the ice. Suggest how this affects friction .
Answer:
The water acts like a lubricant therefore has a smooth motion over the ice.
A ball is thrown horizontally with an initial velocity of 5.0 meters per second.
The ball travels 15 meters horizontally before it lands. What vertical height
was it thrown from?
Hi there!
We can begin by calculating the total time of the ball's projectory:
t = d/v
t = 15/5 = 3 sec
We can use the simplified kinematic equation for time:
t = √2h/g
Rearrange to solve for h:
t² = 2h/g
gt² = 2h
gt²/2 = h
Plug in the values: (g = 9.8 m/s²)
9.8(3)² / 2 = 44.1 m
what activities areaways to overcome barriers to physical fitness
Answer:
No Time
Schedule activities into your day and use an exercise log so you can see how little time it takes.
Build activities into everyday tasks no matter where you are: Bike to work. Use the stairs. Take walk breaks at work. Garden. ...
Find an activity you enjoy that works for your schedule