Answer:
malesef herşey ingilizce yazıyor hiçbirşey anlayamadım
Explanation:
heeeeeem ben bunlardan anlamam giiiit başkasına sooooor bu arada en iyi seç benü bikere bari seçte bi en iyi cvp olsun
A pitcher throws a 150g baseball so that it crosses home plate with a speed of 40 m/s. The ball hit straight back towards the pitcher at 45 m/s. If the contact time between the ball and the bat is 2x10^-3 seconds, what is the magnitude of the force on the ball?
Momentum = (mass) x (velocity)
On the way to the plate, the momentum of the ball was
(0.15 kg) x (40 m/s this way <==) = 6 kg-m/s this way <==
After the hit, the momentum of the ball was
(0.15 kg) x (45 m/s that way ==>) = 6.75 kg-m/s that way ==>
The CHANGE in momentum was 12.75 kg-m/s that way ==>
That's the momentum that the bat gave it.
Change in momentum = Impulse
Impulse = (force) x (length of time the force lasts)
12.75 kg-m/s = (force) x (0.002 second)
Force = (12.75 kg-m/s) / (0.002 second)
Force = 6,375 Newtons, that way ==>
Explain how a chain reaction is sustained.
Answer:
The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes. Thus, the cycle repeats to give a reaction that is self-sustaining.
Explain why the student should open the switch after each
reading.
Answer:
Maybe to get different readings
A reaction that results in the combining of smaller atomic nuclei is ____.
a.
chemical
c.
fusion
b.
fission
d.
ionization
The correct Answer:
B. Fission
4. What is the consequence of atoms being a singular closed system?
Atoms of a certain element contain a fixed amount of energy.
Atoms of a certain element can't be altered by outside forces.
Atoms don't interact with each other in any way.
Atoms decompose slowly over time as they lose energy.
Answer:
*Atomos of a certain element contain a fixed amount of energy.
Explanation:
The atoms are said to be closed systems because the number of protons, neutrons and electrons is fixed, so these elements each have an energy given by the electrical interaction with the other elements.
Consequently, the correct answer is: Atomos of a certain element contain a fixed amount of energy.
Answer:
Atoms of a certain element contain a fixed amount of energy.
Explanation:
Why is it very dangerous
for the driver and
passengers if any bubbles of gas get into
the brake fluid? Even worse what would go wrong if the break fluid leaked out of its pipes?
Answer:
If it leaks....
If there is a brake fluid leak and air gets mixed with the fluid in the brake lines, then the fluid will not be able to flow correctly. As a result, when you press your foot down on the brake pedal, it will feel squishy or spongy. In other words, the brake pedal will feel very soft.
If air bubbles get into....
Air is the enemy in a hydraulic system because it reduces pressure and essentially makes the process less effective. When air gets into the brake lines, your brake system suffers. Symptoms that can indicate you have air in your brake lines include the following: Brake pedal feels spongy when you press down
Hope it helps!!!!
If a wave has a length of 1.2 m and a speed of 2000 m/s, what is the frequency?
Answer:
2400 Hz
Explanation:
frequency = speed × lenght of the wave
chose the one with more potential energy: a 25kg bear or a 30kg bear in a tree?
Answer:
a 30kg
Explanation:
a 30kg
Describe and explain the observations when a small piece lithium is placed on the surface of a big container of water. A few drops of universal indicator have been added to the water.
Explanation:
All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. This shows that the reactivity of the alkali metals increases as you go down Group 1.
Lithium
When lithium is added to water, lithium floats. It fizzes steadily and becomes smaller, until it eventually disappears.
lithium + water → lithium hydroxide + hydrogen
2Li(s) + 2H2O(l) → 2LiOH(aq) + H2(g)
Sodium
When sodium is added to water, the sodium melts to form a ball that moves around on the surface. It fizzes rapidly, and the hydrogen produced may burn with an orange flame before the sodium disappears.
sodium + water → sodium hydroxide + hydrogen
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
Potassium
When potassium is added to water, the metal melts and floats. It moves around very quickly on the surface of the water. The hydrogen ignites instantly. The metal is also set on fire, with sparks and a lilac flame. There is sometimes a small explosion at the end of the reaction.
potassium + water → potassium hydroxide + hydrogen
2K(s) + 2H2O(l) → 2KOH(aq) + H2(g)
Strong alkalis
The hydroxides formed in all of these reactions dissolve in water to form alkaline solutions. These solutions turn universal indicator purple, showing they are strongly alkaline. Strong alkalis are corrosive. Care must be taken when they are used - goggles and gloves should be worn.
Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will
____.
doubles
decreases by half of half
quadruples
decreases by half
Answer:
It will double.
Explanation:
Newton's Law of Gravity states that [tex]F_G=\frac{Gm_1m_2}{r^{2}}[/tex], where G is the gravitational constant, r is the distance between the objects' centers, and [tex]m_1[/tex] and [tex]m_2[/tex] are the objects' masses. We just have simple math here: by doubling [tex]m_1[/tex], we double the entire fraction. By doubling the entire fraction, we double the gravitational pull. Therefore, Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will double.
I hope this helps you understand it! Have a great day, 'kay?
Answer:
It doubles.
If the mass of one of the objects is doubled, then the force of gravity between them is doubled. Since the gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.
What causes light to bend when it moves from one transparent medium to another?
A.
a change in amplitude
B.
a change in color
C.
a change in frequency
D.
a change in speed
Answer:
The answer would be D.) a change in speed
Explanation:
answer for PLATO :)
hope this helps ;)
A car accelerates from rest to 90km/hr in 10 seconds. what is its acceleration in m/s2
Answer:
[tex]2.5m/s^2[/tex]
Explanation:
v = 90km/h = 90000m/h = 1500m/min = 25m/s
a = v/t
a = 25m/s / 10s = [tex]2.5m/s^2[/tex]
The apple is on the tree and it is not moving. What are the two types of forces acting
on the apple?
Answer:
An apple hanging on a tree is acted upon by two basic forces: 1) the downward force exerted by the gravity force and, 2) the upward force exerted by the tree limb. The downward gravity force is also know as "weight".
The two types of forces acting on the apple on the tree are gravitational force and pressure by the wind. The gravitational force acting on it experiences as its own weight.
What is force?Force is an external agent acting on a body to change its motion or to deform it. There are various kinds of force such as gravitational force, magnetic force, nuclear force etc.
Gravitational force is the force by which an object attracts other object into its center of mass. Earth gravitationally pull all objects in its surface to the ground.
The apple on the tree will experience a force of gravitation by the earth as well as the force exerted by the air currents passing through the region.
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Which devices, used together, can measure acceleration
Answer:
A stop watch
A speedometer
Explanation:
Acceleration is the rate of change of velocity of an object with respect to time.
The speedometer can indicate the different speeds, the starting and the final velocity. Then with the stop watch can be used to capture the change in time.
However, acceleration can be measured directly using an accelerometer.
Answer:
Meterstick, stopwatch, and compass
Explanation:
How long did it take our planet to produce the fossil fuels we're using today?
A
hundreds of years
B
thousands of years
с
hundreds of thousands of years
D
hundreds of millions of years
Answer:
i think hundreds of millions of year
Sort the balloons based on the kinds of charges they carry.
first one is negative
second is none
third is posotive
last one is negative
left to right order
Answer:
Explanation:
thats the answer
There's more to motion than simply changing position. True Or False
Answer: I think that it is False, if its wrong I am sorry.
Explanation:
_____ are both ways of preserving current energy resources.
1.Increasing efficiency and energy conservation
2.Removing insulation and using incandescent bulbs
3.Energy conservation and removing insulation
4.Using incandescent bulbs and increasing efficiency
Answer:
4
Explanation:
I think if not. I am sorry
Answer: 1
Explanation: sorry im late
If 2,575J of heat is added to a 250g piece of silver, the change in temperature of the silver will be 43.6 °C? What is the specific heat of of silver
Answer:
58.56°C
Explanation:
Brrrrrrrrrrrrrr
Answer:
0.236 C
Explanation:
PART ONE In a 52 s interval, 381 hailstones strike a glass window of area 1.124 m^2at an angle 43◦to the window surface. Each hailstone has a mass of 5 g and speed of 6 m/s. If the collisions are elastic, find the average force on the window.
Answer in units of N.
PART TWO Find the pressure on the window. Answer in units of N/m^2.
Answer:
Each hailstone has a mass of 7 g and a speed of 4.5 m /s. If the collisions are elastic, what is the average force on the window? ... strike a glass window of an area of 0.954 m2 at an angle of 25◦ to the window surface.
Explanation:
Thats all i hope this helps lol
When forces of 5 N and 7 N respectively act on an object. When will the resultant of the two vectors be at a maxium
Answer:
F = 12 N
Explanation:
Given that,
Force of 5 N and 7 N respectively act on an object.
We need to find the resultant of the two vectors be at a maximum.
Force will be maximum when two forces acts in same direction. It means we can simply add them i.e.
F = 5 N + 7 N
F = 12 N
Hence, the resultant force is 12N.
Which element on the periodic table fights dandruff, directs drivers, and makes copies of your homework?
Answer:
Talc is the known mineral
The 4.0 -kg head of an ax is moving at 3 m/s when it strikes a log and penetrates 0.01m into the log. What is the average force the blade exerts on the log?
Answer:
the average force the blade exerts on the log is 1791.05 N.
Explanation:
Given;
mass of the ax head, m = 4 kg
speed of the ax, v = 3 m/s
depth traveled into the log, d = 0.01 m
The time to traveled through the depth;
[tex]s = (\frac{u+v}{2} )t\\\\0.01 = (\frac{0+3}{2} )t\\\\0.01 = 1.5t\\\\t = \frac{0.01}{1.5} \\\\t = 0.0067 \ s[/tex]
The average force the blade exerts on the log;
[tex]F = ma=\frac{mv}{t} = \frac{4 \times 3}{0.0067} = 1791.05 \ N \\\\[/tex]
Therefore, the average force the blade exerts on the log is 1791.05 N.
which one is a transparent object
a. stone
b. reading glass
c. wax paper
d. dense fog
Answer:
B. reading glass
Explanation:
A large magnifying lens that is usually attached to a handle and that is used to facilitate reading as of fine print also as on map details
What are the primary colors? What are the secondary colors?
Color Basics
Three Primary Colors (Ps): Red, Yellow, Blue.
Three Secondary Colors (S'): Orange, Green, Violet
Answer:
Color Basics
Three Primary Colors (Ps): Red, Yellow, Blue.
Three Secondary Colors (S'): Orange, Green, Violet.
Six Tertiary Colors (Ts): Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet, which are formed by mixing a primary with a secondary.
Explanation:
i added the tertiary colors just in case you need it hoped this helped
A small cockroach of mass 0.00030 kg is caught in the spiders web. The web vibrates at a frequency of 10.0 Hz.?
What is the spring constant for the web? Unit= N/m
Answer: 1.18
Explanation: The formula I used is:
f=1/(2pi) times the square root of k/m
F is the frequency, in this problem, 10 Hz.
K is the spring constant.
M is the mass.
So plugging everything in we would have:
10=1/(2pi)•sqrt x/0.00030
The answer I got was 1.18
11. (II) What is the linear speed, due to the Earth's rotation,
of a point (a) on the equator, (b) on the Arctic Circle
(latitude 66.5° N), and (c) at a latitude of 42.0°N?
Answer:
A) 464m/s
B)185m/s
C)345m/s
Which part of the drum vibrates when it produces sound?
Explanation:
For example, when a drum is struck, the flexible skin (sometimes called a membrane) of the drum vibrates. The compression and expansion of the air on either side of the vibrating membrane produces differences in air pressure. The pressure differences generate a sound wave that propagates outward from the drum surface.
Which landform is most likely formed from the destructive and constructive processes from wind forces?
A. Canyon
B.dunes
C. Mountain
D. Valley
Answer:
B.dunes
Explanation:
sand dunes are created by wind
The landform which is formed from the destructive and constructive processes of wind forces is dunes. Hence, option B is correct.
What is a landform?An anthropogenic or natural land feature on the solid surface of the Earth or another planetary body is referred to as a landform. A given terrain is made up of several landforms, and topography refers to how these landforms are arranged in the surrounding area. In addition to shoreline characteristics like bays, peninsulas, and seas, landforms also include hills, mountains, canyons, and valleys. Submerged structures like volcanoes, mid-ocean ridges, and major ocean basins are also considered to be landforms.
Physical characteristics of landforms, such as height, slope, orientation, stratification, rock exposure, and soil type, are used to classify them. Intuitive elements like berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and many more structural and size-scale elements, including different types of inland and marine waterbodies and sub-surface features, are all examples of gross physical features or landforms.
The landform made of wind are :
The erosional landform madeup of wind is Mushroom rock, zeugen, demoselles, yardang etc.
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true or false When hydrogen joins with oxygen, a hydrogen bond has been formed.
Answer:
hydorgen bond
Explanation: pls give me branliest