Answer:
- أكثر أنواع التربة خصوبة التربة
- الحمراء .
.
ج- السوداء
A compressed spring stores 720 J of energy. A 1 kg block rests on the end of the spring. The spring is released and comes back to its uncompressed length pushing the block away. What is kinetic energy of the block as it leaves the spring? What is the speed of the block at this instant?
Answer:
the kinetic energy of block will be equal to energy stored in spring ie 720 J
the speed of block will be 37.9 m/s
Explanation:
E = m v^2 / 2
v = sqrt (2 * E / m)
v = sqrt (2 * 720 J / 1 kg) = 37.9 m/s
When thermal energy is added to an object, what happens to the motion of the particles?
A.
increases
B.
decreases
C.
remains unchanged
D.
decreases, then increases
The answer is A
Explanation:
Ronald observes a large island off the coast of Indonesia on a map. A few months later, he observes that there are many smaller islands in place of the large one he had seen earlier. Which of these could have caused this change?
Answer:
idgaf
Explanation:
lol
NEED HELP NOW 75 POINTSSSS
In Harry Bahrick’s study, he found participants to be really good at recognizing the __________ of old high school classmates.
A.
homes
B.
ages
C.
faces
D.
names
Answer:
faces
Explanation:
Answer:
C.FACESExplanation:
E20 GOT A HUNDRED PERCENTWhat happens during heat transfer within Earth?
Group of answer choices
Warmer, less dense material rises.
Explanation:
This happens when heat transfers.
Which best illustrates projectile motion
A pictorial diagram of a person hopping sideways at 5 different positions. The start and end positions are on the ground. The correct option is D.
What is projectile motion?Projectile motion is the motion of an artifact thrown or projected into the air that is only affected by gravity's acceleration. The object is known as a projectile, and its path is known as its trajectory.
Any object that is cast, fired, flung, heaved, hurled, pitched, tossed, or thrown is considered a projectile.
Throwing a ball straight up, kicking a ball at an angle to the horizontal, or simply dropping things and letting them fall are all examples of projectile motion.
The pictorial diagram of a person hopping sideways in five different positions best illustrates projectile motion. The starting and ending points are on the ground.
Thus, the correct option is D.
For more details regarding projectile motion, visit:
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Your question seems incomplete, the missing options are:
A pictorial diagram showing a hot air balloon in four different positions, each the same height from the ground and equally spaced.A pictorial diagram with a rocket launched straight upward. The first three positions of the rocket are shown with equal spacing between them.A pictorial diagram with a person swimming and position shown in equal time intervals and equally spaced.A pictorial diagram of a person hopping sideways at 5 different positions. The start and end positions are on the ground.The flow of electricity through the wires is called________?
Answer:
Electric Current
Explanation:
The nucleus of a cell is like the ____ of a large animal.
Why do temperatures differ between air, land, and water?
Answer:the ocean water isn't moving into or through the atmosphere as a result of the sun's heating of the water, convection isn't the process influencing air and water temperature difference. The heat of the ocean is being given off radiated into the air, making the air substantially warmer
Explanation:
A 0.56 kg model rocket produces 53 newtons of upward thrust as it shoots upward off the launch pad. With what acceleration meters per second-squared does the rocket launch?
resultant force = thrust – weight
acceleration = resultant force (newtons, N) divided by mass (kilograms, kg).
Acceleration = resultant force divided by mass
53N/0.56
=94.64 approximately 95
= 95m/s^2
This means that, every second, the speed of the rocket increases by 95m/s2
the S.I unit of Acceleration is meter per second square.
The acceleration in meters per second squared that the rocket launch is 94.64m/s²
According to Newton's second law, the formula for calculating the force acting on a body is expressed as;
F = ma
F is the applied force
m is the mass of the rocket
a is the acceleration of the rocket
Given the following parameters
Mass = 0.56kg
Force = 53N
Substitute the given parameters into the formula as shown:
F = ma
a = F/m
a = 53/0.56
a = 94.64m/s²
Hence the acceleration in meters per second-squared that the rocket launch is 94.64m/s²
Learn more here: https://brainly.com/question/23660292
Question 2 of 25
What is the voltage drop across the 20 resistor?
10.00
120.0 V
20.0 2.
www
30.02
The voltage drop across the 20 Ohm resistor is 40V.
To determine the answer, we need to know about the current flowing through the resistor.
What is the total resistance of the circuit?As the three resistors are connected in series, so the resultant resistance is
10 Ohmv+ 20 Ohm + 30 Ohm = 60 Ohm
What is the current flowing through the resistors?As these resistors are connected in series, so the amount of current flowing through each resistor is equal.According to Ohm's law, current = voltage/resistanceCurrent= 120/60 = 2 A
What is the voltage across the 20 Ohm resistor?According to Ohm's law, voltage across the 20 Ohm resistor
= current×resistance
= 2×20
= 40volt
Thus, we can conclude that the voltage across the 20 Ohm resistor is 40V.
Learn more about Ohm's law here:
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page:
+ At what height from surface of earth accelaration
due to gravity is half of the surface
Answer:
(R=6. 4×106m)
Explanation:
The height above the surface of earth at which acceleration due to gravity is half the acceleration due to gravity at surface of earth
Explanation:
acceleration due to gravity at surface of earth is (R=6. 4×106m)
hope this answer helps you
How far does the gravitational field of Earth extend?
The force of air particles over an area is ________
temperature.
pressure.
volume.
kelvins.
An object free falls for 3.5 seconds . How far does it fall?
A circuit has a voltage drop of 27 Vacross a 30 2 resistor that carries a
current of 1.8 A. How much power is used by the resistor? Use P = V.
O A. 48.6 W
O B. 16.7 W
O C. 1.8 W
O D. 810 W
Please help quickly
Answer:
A. 48.6 W
Explanation:
CAN SOMEONE HELP ME WITH THIS QUESTION!!
Answer:
The one you have selected
Explanation:
That is right
What would be the formula if you
wanted to solve for the
acceleration?
Answer:
acceleration = final velocity - initial velocity / time
V-U/T
Explanation:
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt.
Which of these is an example of mechanical energy being converted to sound energy?
baking cookies in the oven
playing a guitar
alarm clock
Answer:
Playing Guitar
Explanation:
When yout pluck or strum that mechanical energy then the action of plucked and strumming will be converted to sound energy hence will produce the soothing music heard when a guitar is played
i hope its still not a black screen help please
What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant figures.
2,790 J
5,580 J
25,100 J
50,200 J
Answer:
c, 25,100 J
Explanation:
edge2o2o
A power plant to represent the need for and use for energy; label it energy production.
Which of the following terms describes the straightening of a joint, rather than the bending?
A.
flexion
B.
hyperextension
C.
extension
D.
none of the above
Please select the best answer from the choices provided.
A
B
C
D
Answer:
C. extension is the answer
Answer:C
Explanation: I took the test and it was right
plz do it all i will give brainlest and thanks to best answer.
Reply quick pls
a snooker bal travels 4 meters, diagonally across the table it travels at a speed of 5m/s. calculate how long the ball is travelling for
A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much current is passing through the circuit?
Answer:
We applicate formula:
I = V/R
Replacing acording data:
I = 12 V / 10 Ω
Resolving:I = 1,2 A
Result:
The current is of 1,2 Amperes.
Answer:
1.2 amps
Explanation:
I = V/R
V = 12
R = 10
12/10 = 1.2 amperes (amps)
Which element accumulates in the environment due to the use of
fertilizers?
A. oxygen
B. hydrogen
C. nitrogen
D. carbon
To Find :
Which element accumulates in the environment due to the use of fertilizers.
Solution :
Most of the fertilizers used in daily practice are nitrogen fertilizers .
When soil became waterlogged, soil organisms take the oxygen they need from nitrates, leaving the nitrogen in a gaseous form which escapes into the air.
Also, nitrogen is very stable and did not participate in most of the reactions.
So, nitrogen is accumulates in the environment .
Therefore, option C. is correct.
You are one of the forensic anthropologist working on the Romanov Family investigation. You and your team are trying to determine the height of each of victim. Which bone will you analyze to create a profile of the victims?
Answer:
Femur
Explanation:
The bone to forensically analyze in order to create a height profile of the victims would the femur.
The approximate height of a human can best be estimated by measuring the length of the bone that runs from the hip to the knee, otherwise known as the femur.
For the males, the length of the femur in centimeters is multiplied by 2.32 followed by the addition of 65.53 in order to arrive at the approximate height of the individual. For the females, on the other hand, the length of the femur in centimeters is multiplied by 2.47 followed by the addition of 54.1.
Find our the total distance between those 2 womens after 100 seconds. Refer the image for the full question ASAP. Give me a complete brief solution of this above question!
[tex]\small\bf\red{First\: Women}\begin{cases}\sf{Initial\: Velocity\: =\: 15m/s}\\\sf{Time\: Taken\: = 100\: seconds}\end{cases}[/tex]
[tex]\small\bf\green{Second\: Women}\begin{cases}\sf{Initial\: Velocity\: =\: 20m/s}\\\sf{Time\: Taken\: = 100\: seconds}\end{cases}[/tex]
To Find[tex]\:\:\:\:\bullet\:\:\sf{Distance \: between \:them \:after \:{\sf{\blue{100 \:seconds}}}} \\ [/tex]
Solution[tex]\\→\:\:\:\sf Distance\: travelled \:by \:1st \:women\: = \: Velocity \times Time\:taken[/tex]
[tex]→\:\:\:\sf 15 \times 100[/tex]
[tex]→\:\;\:\sf 1500m[/tex]
[tex]→\:\:\:\sf s_{1} = {\sf{\red{1500m}}} \\ \\ [/tex]
[tex]\Rightarrow\:\:\:\sf Distance \:travelled \:by\: 2nd \:women\: = \: Velocity \times Time\:taken[/tex]
[tex]\Rightarrow\:\:\:\sf 20 \times 100[/tex]
[tex]\Rightarrow\:\:\:\sf 2000m[/tex]
[tex]\Rightarrow\:\:\:\sf s_{2} = {\sf{\purple{2000m}}} \\ \\ [/tex]
[tex]\small{\underline{\bf{Now, \:Distance \:between \:them\: =\: s_{2} - s_{1}}}_{}}[/tex]
[tex]\hookrightarrow\:\:\:\sf 2000 - 1500[/tex]
[tex]\hookrightarrow\:\:\:\bf \pink{500m} \\ \\ [/tex]
[tex]{\underline{\bf{Hence, }}}[/tex]
Total Distance between them after [tex]\bf{100 \:seconds}[/tex] is [tex]\bf\orange{500m}[/tex]
Green plants convert light energy from the sun into During photosynthesis
Answer:
Green light is not absorbed but reflected, making the plant appear green. Chlorophyll is found in the chloroplasts of plants. There are various types of chlorophyll structures, but plants contain chlorophyll a and b. These two types of chlorophyll differ only slightly, in the composition of a single side chain.
Explanation:
Hope that helps.