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 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].
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Help pleaase
I'll brainliest the correct answer
Answer:
1) writing homework
2) Helping homeless people
3) Teaching
Explanation:
1)You can finish your homework by your skill.
2)You can help homeless people buy your working skill.
3) You can teach people by your educative skill.
Please give Brainliest
Voyager 1 and Voyager 2. (Note that Plagiarism will result in an automatic Zero. Do not cut and paste. Put things in your own words. please.)
Your job is to research the following two famous satellites and report on the following information about both. Make sure to be specific about what information goes with with one.
1. When were they launched?
2. What were there purposes?
3. Which nation/s were involved in building them?
4. What information have they sent back to earth?
5. What did scientists put on them for extra terrestrial life to find? Make sure to list them and describe what they are and do.
6. Are they still working?
7. Where are they located and where are they going?
8. How fast are they traveling?
9. At least on interesting fact about each.
NEXT - Research at least 5 more satellites and find the following information about them.
1. When were they launched?
2. What were their purposes?
3. Which nation/s were involved in building them?
4. What information have they sent back to earth?
5. How much did they cost to build?
6. Are they still working?
7. Where are they located and where are they going?
8. How fast are they traveling?
9. At least on interesting fact about each.
10. Copy and past a picture of each onto your page.
The voyager program was a space exploration program created to be the first to travel and explore the outer reaches of our solar system and beyond.
The voyager space probes were launched in 1977 and are still functional to this day, making them the longest running space exploration mission. The purpose of the voyager space probes is to relay information back to earth on the various planets and interplanetary objects they fly by.
Through these missions, NASA has received information regarding:
Jupiter's cloud formations and storm systems Volcanic activity on the Jupiter moon of IoInteresting discoveries about the rings of Saturn Voyager 2 discovered a huge magnetic field surrounding Uranus 10 additional moons seen to orbit Uranusand much more, making it already an extremely successful mission.
The voyager spacecrafts were designed and built by the United States of America with government funding and contributions from other renowned space agencies.
As of 2021, voyager 1 is moving with a velocity of 61 thousand km per hour , with voyager 2 moving at roughly 55 thousand km per hour putting them beyond the outer reaches of the inner solar system. This along with the many important finds they are responsible for make them worth the 890 million dollars they cost to build.
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40 meters divided by 5
Answer:
8 meters
Explanation:
40/ 5 = 8
what is a contact time
Answer:
Contact time—or “wet time”—is how long a disinfectant needs to stay wet on a surface in order to be effective
Explanation:
Contact times can range from as little as 15 seconds for common hand sanitizer, to as long as 30 minutes for chlorine oxides used in laboratories.
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 ~
Compared to permanent magnets, why are electromagnets more useful in
many modern technologies?
O A. In permanent magnets, the strength of the magnetic field is more
consistent.
O B. To use an electromagnet, a power supply is not necessary.
O C. Strong permanent magnets are too large to use.
O D. By controlling the current, electromagnets can be turned on and
off.
We want to see why electromagnets are more useful in modern technologies.
We will see that the correct option is D:
"By controlling the current, electromagnets can be turned on and off."
An electromagnet is, as the name implies, a magnet that works with a power supply.
Why these are more useful than normal magnets?
Because you have more control over them. By controlling the current, you not only can turn it on and off, but you also could regulate the strength of the magnetic field.
This extra control is what makes the electromagnet a better option than a permanent magnet.
So the correct option is D: "By controlling the current, electromagnets can be turned on and off"
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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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PLS HELP WITH STEPS I'LL MARK U BRAINLISTT
Answer:
The total distance covered by the student is 35 meters because -15+ 0 + 20 = 35.
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
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.
insert two arithmetic means between 13 and 18.5
Answer:
Describe the process of boiling
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:
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:
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
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:
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
A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?(1 point)
on the downswing as the person is dropping into the ramp
on the downswing as the person is dropping into the ramp
at the top of the ramp before dropping in
at the top of the ramp before dropping in
in the middle of the ramp at the lowest point
in the middle of the ramp at the lowest point
on the upswing as the person is coming up the other side of the ramp
Answer:
at the top of the ramp before dropping in
Explanation:
Potential energy is basically the build up of energy before it's released.
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
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
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 water bottle contains 15.0 ounces of water. A person drinks 0.5 ounces per minute. How many hours will it take to drink all of the water?
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.
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
Which event can be excluded from a list of interactions among Earth's spheres?
A solar flares
B volcanic eruption
C fracking for natural gas
D hurricane
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
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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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]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 .