Answer:
Florence is often named as the birthplace of the Renaissance. The early writers and artists of the period sprung from this city in the northern hills of Italy. As a center for the European wool trade, the political power of the city rested primarily in the hands of the wealthy merchants who dominated the industry
Explanation:
Answer:
Florence is often named as the birthplace of the Renaissance. The early writers and artists of the period sprung from this city in the northern hills of Italy. As a center for the European wool trade, the political power of the city rested primarily in the hands of the wealthy merchants who dominated the industry
Explanation:
Aluminium is a non magnetic metal. However, it can become magnetised under special conditions. Explain how. (4 marks)
Answer:
Exposing it to a very strong magnetic field
Explanation:
Aluminium is a non magnetic metal thus it is not magnetic under normal conditions. This is because it interacts with other magnets. The only condition that magnetism can be induced in aluminium is exposing it to a very strong magnetic field.
a 87 kg block is pulled across the table by the horizontal force of 43N with a fictional force of 7.3 opposing the motion calculate the acceleration of the object
Answer:
a = 0.41 [m/s²]
Explanation:
To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = force [N]
m = mass = 87 [kg]
a = acceleration [m/s²]
The frictional force will be taken as negative, since it opposes the movement of the block.
[tex]43-7.3 = 87*a\\35.7 = 87*a\\a=0.41[m/s^{2} ][/tex]
HELP ME PLS i need this rn i love u guys <<3 if u dont know dont answer
Answer:
1.78m/s
Explanation:
Given parameters:
Velocity of the arrow = 22.8m/s
Height of the wall = 15.5m
Unknown:
Time taken for the arrow to reach the ground = ?
Solution:
To solve this problem we employ the appropriate motion equation:
H = ut + [tex]\frac{1}{2}[/tex] g t²
H is the height
u is the initial velocity = 0
g is the acceleration due to gravity = 9.8m/s²
t is the unknown time
15.5 = [tex]\frac{1}{2}[/tex] x 9.8 x t²
15.5 = 4.9t²
t² = 3.16
t = 1.78m/s
To what extent do covalent compounds conduct electricity?
O always
O usually
O rarely
O never
Answer:
never....(D)
Explanation:
hope this helps, the person above me is also correct
Covalent compounds never conduct electricity as we know that these compounds are formed by the sharing of electrons where free electrons are unavailable for the flow of the electric current.
Therefore the correct answer is option D.
What is a covalent bond?Covalent bonds are formed between two atoms, whether they are similar or different when they share an extra electron.
The transport of electrons produces the ionic bond.
Intermolecular compounds are known to never carry electricity because they are created by shared electrons, which prevents free electrons from being available for the transmission of an electric current.
Option D is the right response as a result.
Learn more about covalent bonds from here,refer to the link;
brainly.com/question/19382448
#SPJ6
Complete the following sentences.
mento
When you drop a ball, it falls to the ground,
This happens because the
pulls the ball
towards it with a force called
I
Forces are measured in units called
(Total 3 marks)
What is the weight of a 225 kg space probe on the moon? The gravitational field on the moon is 1.62 N/kg. Show work.
a. 139 N
b. 364 N
c. 1.35 x 10^3 N
d. 2.21 x 10^3 N
Answer:
b. 364 [N]
Explanation:
We must remember that the gravitational force can be calculated by means of the product of mass by acceleration. In this case, the acceleration corresponds to the gravitational acceleration of the moon.
[tex]F=m*g\\[/tex]
where:
F = force [N]
m = mass = 225 [kg]
g = moon gravity acceleration = 1.62 [m/s²]
[tex]F = 225*1.62\\F = 364.5[N][/tex]
The weight is 364 N
The calculation can be done as follows
mass= 225 kg
gravitational field= 1.62 N/Kg
Formula is
F= mg
= 225 ˣ 1.62
= 364
= 364 N
Hence the weight of the probe on the moon is 364N
Please see the ink below for more information
https://brainly.com/question/2900867?referrer=searchResults
10. Does the Earth's magnetic field protect us from the Sun's particles? What are the auroras?
An engine has 180,000 W of power and can accelerate from rest to a top speed in 9 s. How much work did the engine do?
Answer:
1620000J
Explanation:
Given parameters:
Power = 180000W
Time = 9s
Unknown:
Work done by the engine = ?
Solution:
Power is the rate at which work is being done.
Now,
Power = [tex]\frac{Work done }{time}[/tex]
Work done = Power x time taken
Work done = 180000 x 9 = 1620000J
if you know how to SHiFT in sleep how do you do it
please help asap!!!!
Answer:
B
Explanation:
Does sound travel faster through steel or oxygen?
Answer:
Steel
Explanation:
Sound waves travel over 17 times faster through steel than through air.
Answer:
Steel
Explanation:
This is because solid objects molecules are more packed together, therefore it travels faster, in which time oxygen by 17 times faster
energy released in a chemical reaction comes from ?
Drag each tile to the correct location.
An aspect of climate change involving cloud cover is one example of a negative feedback loop. Complete the steps of this negative feedback
loop.
increased formation
of clouds
decreased temperatures
increased evaporation
from oceans
increased carbon dioxide in
atmosphere
increased greenhouse effect
and warmer temperatures
1
+
increased precipitation
Edmentum. All rights reserved.
Answer:
Look at the image please
Explanation:
(5) A 4 kg. object rests on a flat, horizontal surface with a static
coefficient of friction of 0.25. What minimum force will be necessary to
start the object in motion? If the coefficient was smaller, what effect would
that have? If it was larger?
Answer:
F = 9.81 [N]
Explanation:
To solve this problem we must use Newton's third le which tells us that the sum of forces on a body that remains static must be equal to one resulting from these forces in the opposite direction.
Let's perform a summation of forces on the vertical axis-y to determine the normal force N.
∑F = 0 (axis-y)
[tex]N - m*g = 0[/tex]
where:
m = mass = 4 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N - (4*9.81)=0\\N = 39.24 [N][/tex]
Now we know that the frictional force can be calculated using the following equation.
f = μ*N
where:
f = friction force [N]
μ = friction coefficient = 0.25
N = normal force = 39.24 [N]
Now replacing:
[tex]f = 0.25*39.24\\f = 9.81[N][/tex]
Then we perform a sum of forces on the X-axis equal to zero. This sum of forces allows us to determine the minimum force to be able to move the object in a horizontal direction.
∑F = 0 (axis-x)
[tex]F-f=0\\F-9.81=0\\F= 9.81[N][/tex]
If the coefficient was smaller, a smaller force (F) would be needed to start the movement, this can be easily seen by replacing the value of 0.25, by smaller values, such as 0.1 or 0.05.
If the coefficient were larger, a larger force would be needed.
Can you please answer qeastion
Answer:
the mantel
Explanation:
yeeeeaaaaaaa
A car, with an initial velocity of 22 m/s west, travels for 345 seconds. If it has a final velocity of 44 m/s west what is its’ acceleration?
Answer: 0.064 m/s²
Explanation:
Initial velocity = 22m/s
Final velocity = 44m/s
Time taken = 345 seconds
Acceleration = (Final velocity - Initial velocity) / Time taken
= (44 - 22) / 345
= 22/345
= 0.0637681
= 0.064 m/s²
Therefore, the acceleration is 0.064 m/s².
Present Your Findings
In the essay box, compose a scientific report which includes your observations, data, and conclusions. The following questions should be answered in your conclusion.
Why does the first method for determining volume work only for a regularly shaped object?
Will the second method for determining volume work for any object or just an irregularly shaped one? Why?
Is one method of measurement more accurate than the other? Why or why not?
Would the displacement method of measurement work for a cube of sugar? What about a cork? Why or why not?
What did you find out from this investigation? Be thoughtful in your answer.
This question would be a piece o' cake, except that we don't know your observations, your data, or your conclusions.
We also don't know the first method, the second method, the accuracy of either method, the displacement method, or what you found out from this investigation.
Otherwise, like I said, this is really no problem.
A duck flies 60 m in 6 seconds what is the ducks speed? Show your work plz
Answer:
Wouldn’t his or hers speed be 10m?
Explanation:
because 60 divided by 6 = 10
so 10m per second?
The alpha decay of radon-198
Planet A has a gravitational field strength of 8.0 N/kg near its surface.
Planet B has three times the mass of Planet A and is half of its size.
What would be the gravitational field strength of planet B near its surface?
Answer: 96 N/kg
Explanation:
In this circuit, energy is transferred from a battery to a circuit wire and then to a light bulb, where some of it leaves the system. Starting from the battery, which series shows the correct order of energy transformations taking place in this circuit?
Answer: The correct order of energy transformation is from CHEMICAL ENERGY to ELECTRICAL ENERGY to LIGHT ENERGY
Explanation:
Energy which is simply defined as the ability to perform work is made up of different forms, these include:
- Mechanical energy: Associated with machines at work.
- LIGHT ENERGY: produced by light bulbs
- ELECTRICAL ENERGY: taking in by television set and other electrical appliances.
- CHEMICAL ENERGY: stores in food and other fuels
- Sound energy: Produced by vibrating objects example piano, drums.
According to the law of conservation of energy, energy can neither be created nor destroyed in a closed system, but can be transformed from one form to another, thereby keeping the energy in the closed system constant. From the question, the circuit is an example of a closed system and the order of energy transformation taking place is from the battery (CHEMICAL ENERGY) to ELECTRICAL ENERGY(power source) to LIGHT ENERGY(bulb). I hope this helps, thanks.
A car is going through a dip in the road whose curvature approximates a circle of radius 200 m. At what velocity will the occupants of the car appear to weigh 20% more than their normal weight (or their normal weight times 1.2)?
Answer:
Explanation:
The solution along with the diagram can be found in the attachment. Feel free to raise doubts.
Centripetal force is defined as the force that allows the object to follow a curvature path.
The velocity will be 19.80 m/s.
Given:
Normal Force = 1.2 x weight
Normal Force = 1.2 Mg
Mass = Mass of car + occupants
Centripetal Acceleration = [tex]\text a_c[/tex]
Now, applying the equilibrium equation:
[tex]\begin{aligned} \sum \text F&= \text m \times \text a_c\\\\\text F_n - \text{mg} &= m \times \text a_c\\\\1.2 \text{Mg} - \text{Mg} &= m \times \text a_c\\\\\text a_c &=0.2 \;\text g\\\end[/tex]
Now, substituting the value in the formula:
[tex]\begin {aligned} \text a_c &=\dfrac{\text v^2}{\text r}\\\\0.2 \text g &= \dfrac {\text v ^2}{\text r}\\\\\text v &= \sqrt{0.2 \times 9.8 \times 200}\\\\\text v &= 19.80 \;\text {m/s}\end[/tex]
Thus, the velocity will be 19.80 m/s.
To know more about centripetal acceleration, refer to the following link:
https://brainly.com/question/17689540
Which is an example of kinetic energy?
a. an archer's bow with the string drawn back
b.river water at the top of a waterfall
c. a Ferris wheel before it starts turning
d.a crumb falling from a table.
Answer:
it's a
Explanation:
Answer:
I believe its D!
Explanation:
Kenetic energy is motion
The first five questions refer to the following problem:
A model rocket lifts off with an upward thrust of 35 Newtons. It has a mass of 2.5 kilograms and a weight of 25 Newtons. How quickly does the rocket accelerate?
What is the first equation you would use to answer this question?
Question 3 options:
Fnet=F↑−F↓
Δt=Δdv
Δd=d2−d1
F12=−F21
Answer:
Δd=d2−d1Explanation:
good morningWhich unit abbreviation is a measurement of force?
A.
m/s
B.
m/s2
C.
N
D.
N/s
Answer:
N
Explanation:
Plato
Please find the average of the following numbers
9,10,100,50,20
Answer:
Average: 22.142857142857
Average =
Sum
Count
=
155
7
= 22.142857142857
Sum 155
Count 7
Median 23
Geometric Mean 16.412764443111
Largest 38
Smallest 2
Range 36
Answer:
15.4
Explanation:
Describe a light wave and explain how light wave travel through solids liquids and gasses
What is the weight of a person who has a mass of 60 kg
Answer:
Depends on the grativy of the planet. On Earth is 600 Newtons
Explanation:
W = M . G
W = 60 . 10
W = 600
1. Which is one characteristic of a SMART fitness goal?
A. Endurance
B. Intensity
C. Attainable
D. Believable
Answer:
I would say D. Believable. Sorry if its wrong.
Explanation:
what is gravity ?short ans
Answer:
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.