Answer:
See the explanation below.
Explanation:
This analysis can be easily deduced by means of Newton's second law which tells us that the sum of the forces or the total force on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = total force [N]
m = mass [kg]
a = acceleration [m/s²]
We must clear the acceleration value.
[tex]a=\frac{F}{m}[/tex]
We see that the term of the mass is in the denominator, so that if the value of the mass is increased the acceleration decreases, since they are inversely proportional.
Name three items to remember when completing a job application.
1. ) It's good to remember contact information such as phone number or email.
2.) Your address, so if they need to mail anything to you, they can. This is also a necessary point of information on most job applications anyway.
3.) Past job experiences and ways to contact them. This is probably one of the most important things as it shows you've worked before and are willing to talk to past employers.
May I have brainliest please? :)
Answer:
the other answer is correct
Explanation:
i do flvs and this was on the career final exam
Do not bounce as stretching because this can cause muscle fibers to shorten, not lengthen, causing injury to the muscles
True or False
Answer:
True
Explanation:
I searched it up :)
A 15.0-kg block is dragged over a rough, horizontal surface by a 70.0-N force acting at 20.0° above the horizontal. The block is displaced 5.00 m, and the coefficient of kinetic friction is 0.300. Find the work done on the block by a) The 70-N force, b) The normal force, and c) The gravitational force. D) What is the increase in internal energy of the block-surface system due to friction? E) Find the total change in the block's kinetic energy.
Answer:
Explanation:
from the question we are told that
Load [tex]L=15kg[/tex]
Force[tex]F=70N[/tex]
Angle of inclination [tex]=20.0 degres[/tex]
Displacement [tex]m=5 meters[/tex]
coefficient of kinetic friction [tex]\alpha =0.300[/tex]
Nuclear fusion is more reliable and sustainable source of energy than nuclear fission chain reaction justify this statement with plausible arguments
Answer:
1. Nuclear fusion does not generate radioactive nuclear wastes as nuclear fission does.
2. Nuclear fusion cannot lead to disastrous powerplant explosions as nuclear fission does.
3. More energy is generated during nuclear fusion than in nuclear fission.
Explanation:
Nuclear fusion involves the combination of lighter atoms such as hydrogen to form a heavier nucleus, in the process producing a tremendous amount of energy.
Nuclear fission on the other hand involves splitting a heavy nucleus into two lighter nuclei, releasing energy in the process.
Nuclear fusion can be more reliable than nuclear fission in energy generation due to the following reasons:There are no radioactive waste products obtained as a result of nuclear fusion, unlike nuclear fission. This is because the elements involved in Nuclear fusion are relatively radioactively stable elements.The risk of nuclear powerplant explosion due to out of control chain reactions is reduced in nuclear fusion because the reaction can only occur in perfect conditions under high pressure and temperatures (e.g the sun). When any of these conditions is removed due to a fault, the reaction automatically stops.More energy is generated during nuclear fusion than in nuclear fission.Nuclear fusion and fission release a tremendous amount of energy using radioactive material as a fuel.
What are Fusion and fission?Nuclear fusion is a reaction that occurs when two nuclei merge to form a larger nucleus and release a massive quantity of energy.
The breaking of two nuclei into smaller nuclei is known as nuclear fission. Nuclear fission also releases a significant amount of energy.
The key is how tightly the nucleons in a nucleus are bound together. The surplus energy will be released if a nuclear reaction produces nuclei that are more closely bonded than the originals. The most securely bound atomic nuclei are found to be around the size of iron-56. Thus,
When a nucleus significantly larger than iron is broken into tiny bits, energy is released since the smaller fragments have lower energy.
To know more about fusion and fission follow https://brainly.com/question/114533
Calculate the total energy transferred when 200 g of ice cubes at 0°C are changed to steam at 100°C.
Specific heat capacity of water = 4200 J/kg °C
Specific latent heat of fusion = 340 kJ/kg
Specific latent heat of vaporisation = 2260 kJ/kg
Answer:
[tex]604000\ \text{J}[/tex]
Explanation:
m = Mass of ice = 200 g
[tex]\Delta T[/tex] = Temperature change of water = [tex](100-0)^{\circ}\text{C}[/tex]
c = Specific heat capacity of water = 4200 J/kg °C
[tex]L_f[/tex] = Specific latent heat of fusion = 340 kJ/kg
[tex]L_v[/tex] = Specific latent heat of vaporisation = 2260 kJ/kg
Heat required to convert ice to water = [tex]mL_f[/tex]
Heat required to raise the temperature of water to boiling point = [tex]mc\Delta T[/tex]
Heat required to convert water to steam = [tex]mL_v[/tex]
Total heat required
[tex]q=mL_f+mc\Delta T+mL_v\\\Rightarrow q=m(L_f+c\Delta T+L_v)\\\Rightarrow q=0.2(340\times 10^3+4200(100-0)+2260\times 10^3)\\\Rightarrow q=604000\ \text{J}[/tex]
Heat required to convert the given amount of ice to steam at the required temperature is [tex]604000\ \text{J}[/tex].
What type of fuze is energized after the projectile is fired and functions when the projectile nears the target
Answer:
Proximity or variable time fuze
Explanation:
A fuze are components that produces a projectile bursting charge, thereby causing a detonating or release when its activation conditions are met.
There are different types of fuzes classified based on their function. Types are:
Time fuzes: This is a type of fuze that start to work after a projectile has been firedProximity or variable time fuze: This type of fuze is energized after the projectile is fired and function when the projectile nears the target.Percussion fuze: This type of fuze function when the projectile strike or penetrate a target.Which object has the most potential energy...
ASAP
A box is placed on a 30o frictionless incline. What is the acceleration of the box as it slides down the incline
Answer:
2.78m/s²
Explanation:
Complete question:
A box is placed on a 30° frictionless incline. What is the acceleration of the box as it slides down the incline when the co-efficient of friction is 0.25?
According to Newton's second law of motion:
[tex]\sum F_x = ma_x\\F_m - F_f = ma_x\\mgsin\theta - \mu mg cos\theta = ma_x\\gsin\theta - \mu g cos\theta = a_x\\[/tex]
Where:
[tex]\mu[/tex] is the coefficient of friction
g is the acceleration due to gravity
Fm is the moving force acting on the body
Ff is the frictional force
m is the mass of the box
a is the acceleration'
Given
[tex]\theta = 30^0\\\mu = 0.25\\g = 9.8m/s^2[/tex]
Required
acceleration of the box
Substitute the given parameters into the resulting expression above:
Recall that:
[tex]gsin\theta - \mu g cos\theta = a_x\\[/tex]
9.8sin30 - 0.25(9.8)cos30 = ax
9.8(0.5) - 0.25(9.8)(0.866) = ax
4.9 - 2.1217 = ax
ax = 2.78m/s²
Hence the acceleration of the box as it slides down the incline is 2.78m/s²
HELP PLS ITS BEEN AN 3 HOURS
Answer:
0.433 s
Explanation:
Let's break the projectile motion into its horizontal and vertical components:
Horizontal component (x):
3.22 * cos(62.9)Vertical component (y):
3.22 * sin(62.9)We want to find the time required for the hurdler to travel a distance of 0.635 m. In order words, his displacement should be 0.635 m in the x-direction.
Since we don't have the final velocity, we can use this constant acceleration equation:
Δx = v₀t + 1/2at²We have three known variables and want to solve for t. Using this equation in the x-direction, we have:
Δx = 0.635 mv₀ = 3.22 * cos(62.9)a = 0 m/s² t = ?Substitute these values into the equation.
0.635 = [3.22 * cos(62.9)] t + 1/2(0) t²Simplify the equation.
0.635 = 3.22 * cos(62.9) tDivide both sides by the horizontal component of the initial velocity.
0.432899075 = tSince we start with 3 sig figs, we will round this value to 0.433. The time it takes to clear the hurdle is 0.433 seconds.
Which two terms describe salt (NaCl)?
A. Mixture
B. Compound
C. Element
D. Pure substance
Answer:
B. compound
Explanation:
Because Salt (NaCl), sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form halite, or rock salt, is sometimes called common salt to distinguish it from a class of chemical compounds called salts.
Answer:
B and either C or D
Explanation:
At which temperature does water have particles with a greater average kinetic energy than water with a temperature of 30°C?emperature of 30°C?
77°F
95°F
280K
300K
Answer:
95 degree Fahrenheit
Explanation:
Explanation:
First we convert these temperatures into °C:
77°F = 25°C
95°F = 35°C
280K = 6.85°C
300K = 26.85°C
When temperature increases, water molecules have a greater average kinetic energy ans are more likely to collide with each other.
Out of the 4 temperatures, only 95°F (35°C) is of a higher temperature than 30°C. Hence 95°F is the answer.
A football kicked in front of a goal post at an angle of 45 degree to the ground just clear the top by of the post 3m high. Calculate the velocity of projection and the time taken to hit the ground again from the instant it was kicked.
Answer:
A. 10.84 m/s
B. 1.56 s
Explanation:
From the question given above, the following data were obtained:
Angle of projection (θ) = 45°
Maximum height (H) = 3 m
Acceleration due to gravity (g) = 9.8 m/s²
Velocity of projection (u) =?
Time (T) taken to hit the ground again =?
A. Determination of the velocity of projection.
Angle of projection (θ) = 45°
Maximum height (H) = 3 m
Acceleration due to gravity (g) = 9.8 m/s²
Velocity of projection (u) =?
H = u²Sine²θ / 2g
3 = u²(Sine 45)² / 2 × 9.8
3 = u²(0.7071)² / 19.6
Cross multiply
3 × 19.6 = u²(0.7071)²
58.8 = u²(0.7071)²
Divide both side by (0.7071)²
u² = 58.8 / (0.7071)²
u² = 117.60
Take the square root of both side
u = √117.60
u = 10.84 m/s
Therefore, the velocity of projection is 10.84 m/s.
B. Determination of the time taken to hit the ground again.
Angle of projection (θ) = 45°
Velocity of projection (u) = 10.84 m/s
Time (T) taken to hit the ground again =?
T = 2uSine θ /g
T = 2 × 10.84 × Sine 45 / 9.8
T = 21.68 × 0.7071 / 9.8
T = 1.56 s
Therefore, the time taken to hit the ground again is 1.56 s.
What is Physics? How is Physics used in your everyday life? Give at least two examples and explain your answer. You need at least 3 examples
Answer:
Physics is a brand of science that deals with nature, matter, and energy. Physics is used in the everyday world because we have simple objects such as levers that use physics. we also have Newton's law of transportation that manipulate everyday objects making them move, so without physics many objects wouldn't move.
In a convection current, why does cool air take the place of warmer air?
1.Cool air is denser than warm air, so it sinks to take the place of rising warm air.
2.Cool air is less dense than warm air, so it sinks to take the place of rising warm air.
3.Cool air is denser than warm air, so it rises to take the place of sinking warm air.
Answer:
1. Cool air is more dense than warm air so it sinks to take the place of the warm rising/buoyant air.
Explanation:
This is why heating a room with cold outside walls or glass windows (if budget can afford), we use warm radiant heaters at the floor level to break up the convection current/cold draft.
As opposed to just diffusing air at the ceiling level, which is good in summer as cool air falls (air conditioning is in range of 55 to 65 degf out of the diffuser), mixing with warmer room air.
differentiate between basic quantities and physical quantities
Answer:
Base quantities are the minimum numbers of the physical quantities. Base quantities are defined as the physical quantities which can not be defined in terms of other physical quanities. There are seven base quantities. Physical Quantitie Units Derived Quantities are defined as those physical quantities which are derived from the base quantities.
Explanation:
A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit. A physical quantity possesses at least two characteristics in common, one is numerical magnitude and other is the unit in which it is measured.
Distinguish between a basic physical quantity and a derived physical quantity giving an example of each. Answers. Basic physical quantities are quantities which can be obtained without derivation. e.g Temperature. While derived physical quantities are quantities which can only be obtained from other physical quantities.
A driver slows down her car from 32.7 km/hr at a constant rate of 0.63 m/s2 just by taking her foot of the accelerator (the gas pedal). Calculate the distance the car travels during the sixth second (between t=5 and t=6 seconds)that she is coasting.
Answer: She moves 5.616 meters in that second.
Explanation:
If we define t = 0s as the moment when she starts decelerating we can write the function of acceleration as:
a(t) = -(0.63 m/s^2)
where the negative sign is because she is slowing down.
The velocity equation can be found if we integrate over time:
v(t) = -(0.63m/s^2)*t + v0
Where v0 is the constant of integration, that represents the initial velocity, in this case is:
v0 = 32.7 km/h
Now, because the acceleration is in m/s^2, we should write this velocity in m/s.
in one km we have 1000 meters, and in one hour we have 3600 seconds, then we have that:
32.7 km/h = 32.7 *(1000/3600) m/s = 9.08 m/s
Then the velocity equation becomes:
v(t) = -(0.63m/s^2)*t + 9.08 m/s
And for the position equation, we should integrate again to get:
p(t) = -(1/2)*(0.63m/s^2)*t^2 + (9.08m/s)*t + p0
Where p0 is the initial position.
For this problem, we want to find the distance that she moved between t = 5s and t = 6s, and that can be calculated as:
D = p(6s) - p(5s)
D = -(1/2)*(0.63m/s^2)*(6s)^2 + (9.08m/s)*6s + p0 +(1/2)*(0.63m/s^2)*(5s)^2 - (9.08m/s)*(5s) - p0
D = -(1/2)*(0.63m/s^2)*((6s)^2 - (5s)^2) + (9.08m/s)*(6s - 5s)
D = 5.615 m
She moves 5.616 meters in that second.
no work is said to be done by standing man carrying 500kg load.why?
Answer:
no work is said to be done by standing man carrying 500kg load because
Explanation:
for the work to be done there should be two conditions i.e force should be applied and displacement must be covered.So for a man carring a 500 kg load force is there but he covers no distance by standing so displacement will be zero and since
work =force\displacement
displacement is zero so we can say that no work is done
lol gn sleep well:))
Answer:
you to
Explanation:
sleep well and long and thank you for the points
C. A rock falls for 4 seconds. How far did it fall
Answer:
Calculates the free fall distance and velocity without air resistance from the ... for 24 seconds so i asumed that he fell for twelve seconds and this did the rest of it.
Explanation:
If a rock falls for 4 seconds assuming its initial velocity is zero and its falls only under the influence of gravity it would fall 122.625 m
What are the three equations of motion?Newton provided three equations of motion.
The first equation is given as follows
v = u + at
the second equation is given as follows
S = ut + 1/2×a×t²
the third equation is given as follows
v² - u² = 2×a×s
As given in the problem If a rock falls for 4 seconds assuming its initial velocity is zero and its falls only under the influence of gravity it would fall
S = ut + 1/2at²
u= 0 m/s , a=9.81 m/s² and t =4seconds
S = 0+ 0.5*9.81*5²
S= 122.625 m
Thus, the rock would fall 122.625 m if it falls for 4 seconds
Learn more about equations of motion from here
brainly.com/question/5955789
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A gymnast performs an amazing flip! He lands on the floor and his feet put a force downwards on the floor. Newton’s Third Law reaction force is:
(A)The weight of gravity on the gymnast
(B)The weight of gravity on the floor
(C)The force of the floor upwards on his feet
(D)The force of the floor downwards on his feet
Answer:
Solution in photo
Explanation:
A marble, rolling with speed of 20m/sec rolls off the edge of the table that is 180m high (g=10m/sec2), find time taken to drop to the ground.
a. 10sec
b. 8sec
c. 6sec
d. 12sec
Answer:
Choice: c. 6sec
Explanation:
Horizontal Launch
When an object is thrown horizontally with a speed (v) from a height (h), it describes a curved path ruled by gravity until it finally hits the ground.
The horizontal component of the velocity is always constant because no acceleration exists in that direction, thus:
[tex]v_x=v[/tex]
The vertical component of the velocity changes in time because gravity makes the object fall at increasing speed given by:
[tex]v_y=g.t[/tex]
Where [tex]g=10 m/s^2[/tex]
To calculate the time the object takes to hit the ground, we use the same formula as for free-fall, since the time does not depend on the initial speed:
[tex]\displaystyle t=\sqrt{\frac{2h}{g}}[/tex]
The marble rolls the edge of the table at a height of h=180 m, thus:
[tex]\displaystyle t=\sqrt{\frac{2*180}{10}}[/tex]
[tex]\displaystyle t=\sqrt{36}[/tex]
t = 6 sec
Choice: c. 6sec
Answer:
The answer is:
C) 6sec
Hope it helps:D
Kate is riding on a train and notices that the wildflowers by the side of the tracks seem to be moving by much faster than the mountains in the distance. This is an example of
Answer: motion parallax
Explanation:
Motion parallax refers to a form of depth perception whereby objects that are closer to an individual appears to move at a faster speed than the objects that are far.
Therefore, Kate is riding on a train and notices that the wildflowers by the side of the tracks seem to be moving by much faster than the mountains in the distance is an example of motion parallax.
How can you distinguish
between a reliable and
non-reliable source of
information?
Answer:
The answer to this question is given below in this explanation sections.
Explanation:
Reliable sources:
When researching you always need to be sure that you are getting your information from reliable sources.Some sources are considered to be" reliable" because they have been written by people who are experts in the field.These are the sources you canun reliable sources:
on the other hand some sources are not reliable because may not have a through knowledge or full understanding a topic.anyone you can post information on the internet we need to be critical reader to order determined.IIIIIII-PLEASE HELP-IIIIII THERE ARE TWO QUESTIONS (ILL GIVE BRAINLIST)
Answer:
the answers should be B and D
Answer:
Q. 1 is transform
Q. 2 is plates move past each other sideways
Explanation:
Two masses, m1 & m2 are separated by a distance of 12 m between their centers. The gravitational force attraction between the two masses is measured to be 6.0 x 10-6 N. The masses are then moved closer to one another, to a distance of 4 m between centers, and the resulting gravitational force is measured again. According to the Universal Law of Gravitation, the second measurement is
The universal law of gravitation says that the gravitational force between the two masses is
F₁ = G m₁ m₂ / r ² = 6.0 × 10⁻⁶ N
where r = 12 m. When the distance between the two masses is reduced to R = 4 m, i.e. 1/3 of the original distance r, we have
F₂ = G m₁ m₂ / R ² = G m₁ m₂ / (r/3)² = 1/9 G m₁ m₂ / r ² = 1/9 F₁
so that the resulting gravitational force has 1/9 the first magnitude, or
F₂ = 1/9 (6.0 × 10⁻⁶ N) ≈ 6.7 × 10⁻⁷ N
(physical science) could someone please help me out with this lab? if i’m being honest i did the lab but i lost all of my work :( if anyone could help at all that would be great . i am in a bind right now
Explanation:
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It has been known for many years that ceramics can conduct electricity. In 2008, scientists found a ceramic material that can conduct electricity with no resistance at 133 K. What is the most important significance of this 2008 finding?
This is a lower temperature than Onnes’s experiment, and it will allow for a broader use of superconductors.
This is a higher temperature than Onnes’s experiment, and it will allow for a broader use of superconductors.
Materials that can conduct electricity with no resistance are new and can allow for new materials to be made.
Ceramic materials have been known to be able to conduct electricity prior to year 2008.
Answer:
mercury
Explanation:
edge 2020
PLEASE HELP: A planet has an average distance to the sun of 3.36AU. In two or more complete sentances, explain how to calculate the orbital peroid of the planet and calculate it.
Answer:
Use the AU formula
Explanation:
1 astronomical unit = 149597871 kilometer
PLEASE ANSWER ASAP! It would be EXTREMELY appreciated if you could answer both. These are free responses, so try to make your answer somewhat original. Thanks in advance! And I will mark brainliest!
The body starts from rest and moves evenly accelerated. At the end of the eighth second of movement, its speed is 16 m / s. Calculate the acceleration of the body and how fast it was at the end of the fourth second.
Answer:
a = 2 m/s²
v₄ = 8 m/s
Explanation:
We can find the final speed at the end of eight second by using first equation of motion:
[tex]v_{f} = v_{i} + at\\[/tex]
where,
vf = final velocity at 8th second = 16 m/s
vi = initial velocity = 0 m/s
a = acceleration = ?
t = time = 8 s
Therefore, using the values in the equation we get:
[tex]16\ m/s = 0\ m/s + a(8\ s)\\\\a = \frac{(16\ m/s)}{8\ s}[/tex]
a = 2 m/s²
Now, we can apply same equation of motion for 4 seconds of motion to find the velocity at the end of 4th second (v₄):
[tex]v_{4} = 0\ m/s + (2\ m/s^2)(4\ s)\\[/tex]
v₄ = 8 m/s