3.53 cm
Explanation;Mechanical advantage = Input distance/output distance
Input distance = 3.0 cm
Mechanical advantage = 0.85
Output distance = Input distance/Mechanical advantage
= 3.0/0.85
= 3.53 cm
A sonic boom is caused by _____.
a sound-producing object moving toward an observer
a sound-producing object overtaking it’s own sound waves
a sound-producing object moving away from an observer
a sound-producing object traveling just slower than its own sound waves
the first one is the answer
Answer:
a
Explanation:
If you can’t open the lid of a jelly jar what should you do?
If I can't open the lid of a jelly jar, I'd keep trying and if I can't open the lid of a jelly jar after the MANY tries I took, I'd ask for help.
Hit in the center of the top, and it will let some air out, that will make it easier.
Human dignity and worth and social justice are
Human dignity and worth and social justice are TWO OF THE BASIC VALUES OF THE CODE OF ETHICS FOR SOCIAL WORK.
Social workers are those professionals, who promote social change by helping to relieve hardship and suffering. Social work is committed to five basic values, which are:
1. Human dignity and worth
2. Social justice
3. Service to humanity
4. Integrity
5. Competence.
The human dignity and self worth value holds that all human beings have intrinsic value, right to well being, right to self fulfillment and control over their own lives.
The social justice value states that there should be fair and equitable distribution of resources to meet basic human needs and all citizens should have access to public resources in order to achieve full potential.
Please help, I don’t get the question.
All you have to do is get the culmative effect of the forces by predicting the direction in which each object will move. Just write down what you know and put down questions for your teacher.
Adam applies an input force to the pulley as he pulls down to lift the object. As he does this, Adam wonders about how the pulley is helping him. How is the pulley helping Adam lift the object?
A. A fixed pulley lowers the amount of force needed to do the same amount of work.
B. A fixed pulley increases the distance over which the force is applied.
C. A fixed pulley helps Adam change the direction of the effort force.
D. All of these answers are correct.
A is the correct answer
One card is randomly selected from a deck of cards. Find the odds against drawing a spade greater than 2 and less than 7.
(Simplify your answer.)
The number of cards in a deck without jokers is 52. If you draw just one card then the probability is going to have 52 in the denominator
the cards between 2 and 7 in the spade suit are 3 4 5 6. Since you have written "between", 4 cards will be successful.
The answer is P(3,4,5,6) = 4/52 which reduces to 1/13
Answer 1/13.
The odds against drawing a spade greater than 2 and less than 7 from a deck of cards are 25 to 1.
Explanation:The odds against drawing a spade greater than 2 and less than 7 can be found by determining the probability of drawing a spade greater than 2 and less than 7, and then calculating the complement of that probability. Firstly, we need to determine the number of favorable outcomes, which is 2 (the 3 of spades and the 4 of spades). The number of possible outcomes is 52 (the total number of cards in the deck). Therefore, the probability of drawing a spade greater than 2 and less than 7 is 2/52, or 1/26. The complement of this probability, which represents the odds against drawing a spade greater than 2 and less than 7, is 1 - 1/26 = 25/26. So, the odds against drawing a spade greater than 2 and less than 7 are 25 to 1.
It takes a truck 3.56 seconds to slow down from 112 km/h to 87.4 km/h. What is its average acceleration?
1.92 m/s2
−1.92 m/s2
−6.81 m/s2
6.81 m/s2
Answer:
option B
−1.92 m/s2
Explanation:
Given in the question,
time took by truck to slow down = 3.56 sec
initial speed of truck = 112 km/h
final speed of truck = 87.4 km/h
1 km/h = 0.277778 m/s
112 = 31.1 m/s
87.4 = 24.28 m/s
Formula use to calculate the acceleration
v - u = at
where v is final speed
u is initial speed
a is acceleration
t is time
plug values in the equation
24.28 - 31.1 = a(3.56)
-6.8 = a(3.56)
a = -6.8 / 3.56
a = -1.9 m/s²
An object moving in a circle is represented by the motion map. Based on the map, at which point is the object accelerating toward the right?
Answer:
The answer is Z
Explanation:
According to the law of universal gravitation, as mass increases, gravity
As distance
increases, gravity
According to the Law of Universal Gravitation (applying to all things in the universe, hence "universal"), all objects attract each other through gravitational force. ... As mass increases, gravity increases (related linearly) because there is a stronger attraction between objects with more "stuff" (matter).
Courtney wants to test an unknown chemical solution. What test should courtney perform to determine wheather the chemical is an acid or base
Courtney should carry out an acid-base titration, adding a known concentration of an acid or base to the unknown solution until neutrality is achieved, indicated by a colour change in an indicator or a pH measurement. Acids produce H3O+ or H+ ions, while bases produce OH- ions. The volume of known solution added to reach neutrality can help determine the nature and strength of the unknown solution.
Explanation:For Courtney to determine whether an unknown chemical solution is an acid or a base, she should perform an acid-base titration. In this process, a solution of an acid or base with a known concentration, often referred to as the titrant, is slowly added to the solution with an unknown concentration, the analyte, until neutrality has been achieved. Indicator substances such as phenolphthalein, which changes colour based on pH, or a pH meter can be used to determine when this point of neutrality, called the equivalence point, has been reached.
For instance, if Courtney had a known concentration of sodium hydroxide (NaOH), a base, she would add this to the unknown solution until her phenolphthalein indicator changes colour, indicating all the acid in the solution had been neutralised. The amount of NaOH added helps determine whether the unknown solution was acidic, and to what degree.
It's important to remember that acids produce H3O+ or H+ ions in a solution, while bases produce OH- ions. This knowledge can also aid in further understanding of the titration results.
Learn more about Acid-Base Titration here:https://brainly.com/question/40172894
#SPJ12
In 2012, astronomers reported the discovery of a planet that revolved around two Sun-like stars. Kepler-34b, a gaseous planet, revolves around the stars every 289 days, and the stars revolve around each other every 28 days. This information was presented in the January 11, 2012, issue of the journal Nature. Based on the information in the article, which title would be most appropriate? New Planet Found in Open Cluster System New Planet Discovered in Binary Star System Discovery: New Globular Cluster and Planet Discovery: Star System Orbiting New Planet
The most appropriate title would be " New Planet Discovered in Binary Star System ".
This title doesn't have enough glitz and glamour to be the headline of the same information in a newspaper ... as they say, it wouldn't "sell papers". So a headline writer would have to make up a gripping, understandable, grabbing, popular, slightly misleading headline for it.
But the kind of people who read Nature don't need to be baited or tricked into reading something. They're already interested in the subject, and they may be people who work in researching it. They read that journal to keep up with what's happening with things they're already interested in.
Remember ... part of the modern Scientific Method is to let other scientists know all about what you're doing and what you're finding. Nature is one of the places where real scientists do that.
Answer:
New Planet Discovered in Binary Star System
Explanation:
if i contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 k, what is the pressure inside the container?
Answer:
[tex]1.66\cdot 10^5 Pa[/tex]
Explanation:
The ideal gas equation states that:
[tex]pV=nRT[/tex]
where
p is the gas pressure
V is the gas volume
n is the number of moles of the gas
R is the gas constant
T is the absolute temperature of the gas
For the gas in this problem, we have:
[tex]n = 3 mol[/tex] (number of moles)
[tex]V=60 L=60\cdot 10^{-3} m^3[/tex] (gas volume)
[tex]T=400 K[/tex]
So we can solve the formula for p, the pressure of the gas:
[tex]p=\frac{nRT}{V}=\frac{(3 mol)(8.314 J/mol K)(400 K)}{60\cdot 10^{-3} m^3}=1.66\cdot 10^5 Pa[/tex]
The efficiency of a machine increases as the temperature inside _____ relative to the temperature outside.
The efficiency of a machine increases as the temperature inside increases relative to the temperature outside.
Answer:
The correct answer is increases.
Explanation:
According to the second principle of thermodynamics, when two objects at different temperatures come into thermal contact with each other, thermal energy always flows from the hottest object to the coldest.
Therefore we deduce that if the inside temperature of the machine is higher than the outside temperature, the machine will have a higher efficiency.
Have a nice day!
Need help on the first and second one
One
d = 400 m
t = 20 s
speed = ?
speed = 400 / 20
speed = 20 meters/second
Two
d = 50 meters
t = 10 seconds
speed = 50 meters / 10 seconds
speed = 5 meters / second
If the input force on a simple machine is 2 N and the output force is 4 N, what is it’s mechanical advantage?
Explanation:
Given that,
Input force on a simple machine, F = 2 N
The output force on a simple machines, F' = 4 N
The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Mathematically, it is given by :
[tex]m=\dfrac{F'}{F}[/tex]
Putting the value of F and F' in above equation. We get :
[tex]m=\dfrac{4}{2}[/tex]
m = 2
So, the mechanical advantage of the simple machines is 2. Hence, this is the required solution.
Answer:
Mechanical advantage, m = 2
Explanation:
Given that,
The input force on a simple machine, [tex]F_i=2\ N[/tex]
The output force on a simple machine, [tex]F_o=4\ N[/tex]
To find,
The mechanical advantage of the simple machine.
Solution,
The ratio of the output force to the input force of any simple machines is called its mechanical advantage. Its expression is given by the below formula :
[tex]m=\dfrac{F_o}{F_i}[/tex]
[tex]m=\dfrac{4}{2}[/tex]
m = 2
Therefore, the mechanical advantage of the simple machines is 2.
an electrical generator is an important component in a power plant. which best shows the energy transfer diagram for a generator
Answer:The answer is B
Explanation:
A generator produces electricity. Energy enters the system (generator) as kinetic energy. It is converted into electrical energy, which can run electrical appliances. Some energy is always wasted as heat and sound. Therefore, Choice B is the best answer.
Answer:
B
Explanation:
it shows the best answer
A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?
Answer:
0.45 J/gC
Explanation:
The heat absorbed by the sample of iron is given by:
[tex]Q=mC_s (T_f-T_i)[/tex]
where:
Q = 1004 J is the heat absorbed
m = 111.6 g is the mass of the sample
Cs is the specific heat capacity of iron
T_f = 20 C is the final temperature of the sample
T_i = 0 C is the initial temperature
Solving the equation for Cs, we find
[tex]C_s = \frac{Q}{m(T_f-T_i)}=\frac{1004 J}{(111.6 g)(20 C-0 C)}=0.45 J/gC[/tex]
The meteorological reports that today will reach a high of 45 F. Your friend from Sweden asks what the temperature will be in degrees Celsius. What value would you report to your friend
It would be 7.22 degrees Celsius.
Steps: (45°F − 32) × 5/9 = 7.222°C
Which of the following best describes the behavior of silica rich magma
A. Highly viscous and associated with violent eruptions
B. Highly viscous and associated with quiet volcanic eruptions
C. Stays deep within earth because of low viscosity
D. Cannot flow but is limited to fixed areas of hotspot volcanism
Answer:
A. Highly viscous and associated with violent eruptions
Explanation:
Most silica rich magma have high viscosity and huge amount of trapped gases within them. As they continue to upwell and expand, the gases causes violent eruptions near Volcanoes. Most granitic/rhyolitic magma are silica rich.
Answer: Option (A)
Explanation: Silica rich magma are those in which the magma has more than 65 % of silica content. The higher the silica content, the higher is its viscosity i.e viscosity of a magma is directly proportional to the silica content of magma.
This highly viscous magma inside the volcanoes moves sluggishly and mostly gets concentrated in the vents and seals them. With time, when the pressure exerted by the magma is too high, it creates violent eruptions through the vents.
Thus, the correct answer is option (A).
QUESTION IN THE ANSWER!!!!! HELP HELP PLEASE
Check the combination of the horses, review them, you'll get the answer.
How does the thermal energy of a large container of water compare to a small container of water at the same temperature
The large container warms slower than the smaller container because of the amount of space . Both can warm to the same temperature tho just one takes longer than the other . Can I please be marked as brainliest! Have a great day !
The larger container warms up slower than the small one
Kinetic friction is affected by the weight of the object. TrueFalse
Answer;
The above statement is True
Kinetic friction is affected by the weight of the object.
Explanation;Kinetic friction is a force that acts between moving surfaces. An object that is in motion over a surface experiences a force in the opposite direction to the direction of movement.The equation for kinetic friction is given by the formula;F= coefficient of friction * Normal force.
Normal force is the force of the table pushing back on the block and can be calculated by formula;F = mass* acceleration due to gravity.
Therefore, the weight of an object determines its kinetic friction.Answer:
The answer is True. Friction is indeed affected by weight.
Explanation:
Which of the following objects is NOT in a state of equilibrium?
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it.
Two teams pulling a rope in opposite directions, both with a force of 3670 N
An 80-N rope holding up a 920-N weight with a tension of 1000 N.
A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N
Answer:
A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it
Explanation:
An object is said to be in equilibrium when the net force acting on it is zero.
Let's analyze each option:
- A glass table able to withstand a normal force of 450 N when a 500 N object is placed on it. --> NON-EQUILIBRIUM. In fact, the downward force (the weight of the object, 500 N) is more than the maximum upward normal force (450 N), so the net force is non-zero.
- Two teams pulling a rope in opposite directions, both with a force of 3670 N --> EQUILIBRIUM. Both forces are equal in magnitude and opposite in direction, so the net force is zero.
- An 80-N rope holding up a 920-N weight with a tension of 1000 N. --> EQUILIBRIUM. The total force pulling on one side is 80 N + 920 N = 1000 N, which is equal to the force on the other side.
- A 500-newton sign hanging from two chains of insignificant weight, each with a tension of 250 N --> EQUILIBRIUM. The total force pushing on one side is 250 N*2 = 500 N, which is equal to the force on the other side.
A child sits 6 m away from the center of the merry go round. The centripetal acceleration acting on the child’ is 3.6 m/s^2. What is the tangential velocity of the child?
A 4.65 m/s
B 21.6
C 0.6 m/s
D 1.67 m/s
The centripetal acceleration is related to the tangential velocity according to the equation below.
a=v²/r where v is the tangential velocity and r the radius of the circular path.
thus v²=a×r
From the question provided, r=6m acceleration= 3.6m/s²
Therefore using these values in the formula v²=a×r
v=√(3.6×6)
v=√21.6
v=4.65
The answer is A. 4.65 m/s
Kiley, Jermaine, and Gunther are playing tug-of-war. Kiley and Jermaine are on the same side of the rope, and Gunther is on the other side. Kiley is exerting a force of 20 N, and Jermaine is exerting a force of 25 N.
Which force would result in a balanced force for the game?
-45N because you add the side together and make it equal 0
Kiley and Germaine pull together, resulting in a force of 45N which pulls the rope that way ===> .
In order to balance the forces on the rope, Gunther must pull the rope with a force of 45N this way <===, all by himself.
The net force on the rope will then be zero, and the rope will not accelerate. (Although the tension inside the rope will be 90N.)
By the way . . . I'd love to see how the kids manage to all get on the "sides" of the rope. I would have expected them to just do it the easy way and stand at the "ends" of the rope.
HELP ME !!!! A.S.A.P!!!!! WILL BE MARKED AS BRAINLEST!!! 15 POINTS!!!!
Magnets A and B are of equal magnetic strength. In which position will magnets A and B have the greatest attractive force toward each other?
A
B
C
D
C is the correct answer. Opposites attract!
In choice C, the two magnets are closer together so it wouldn't have much attractive force. Whereas, in choice D, the two magnets are further apart so it might have the greatest attractive force.
If I were you, I would choose D, but I suck at school so it probably isn't D.
An electron with a charge value of 1.6x10^-19 C is in the presence of an electric field of 300 N/C when located between a pair of oscilloscope deflecting plates. What force does the electron experience?
(1.6 x 10⁻¹⁹ C) x (300 N/C) = 4.8 x 10⁻¹⁷ Newton
The force experienced by the electron is 4.8×10⁻¹⁷ N.
Electric Field: An electric field is a region or space, where an electric force can be experienced or felt.
The formula of electric force is
F = E×Q............... Equation 1
Where F = Electric force, E = Electric field, Q = Charge.
From the question,
Given: Q = 1.6×10⁻¹⁹ C, E = 300 N/C
Substitute these values into equation 1
F = (1.6×10⁻¹⁹)(300)
F = 4.8×10⁻¹⁷ N.
Hence, The force experienced by the electron is 4.8×10⁻¹⁷ N.
Learn more about electric Field here: https://brainly.com/question/22735564
Which of the following statements is true? -The sun will eventually die, but it will not affect Earth.
- The sun uses its own matter to create light and heat.
-The sun is a rare G2 star, which means it is extremely bright.
-The photosphere is only visible during a total solar eclipse.
I think the true option is "The sun uses its own matter to create light and heat."
Answer:
- The sun uses its own matter to create light and heat.
Explanation:
Sun is composed of gases majorly Hydrogen and Helium. In the core, the hydrogen atoms fuse to form helium atoms. This nuclear fusion reaction in the core produces huge amount of energy in the form of heat and light.
Thus, the statement that sun uses its own matter to create light and heat is true.
Sun is a G2 star. It is not a rare star. It is appears extremely bright because it is closer to earth. Else, it has a average brightness.
When we look at the sun, we actually view the photosphere. chromosphere is only visible during a total solar eclipse.
The sun would eventually die and in this process, it would become red giant expand and engulf the earth. Finally its core would form a white dwarf.
as a box slides down a slope the presence of friction would
the friction would cause the box to move slower
Which of the following is a unit used to express volume? A. gram B. kilogram C. centimeter D. cubic centimeter
D because any answer to volume has to be cubed.