Answer:
x = 625 m
Explanation:
To solve this exercise we use the kinematics relations
v² = v₀² - 2 a x
indicate that the train stops therefore its final speed is zero (v = 0)
0 = v₀² - 2a x
x = [tex]\frac{v_o^2}{2a}[/tex]
let's slow down to the SI system
v₀ = 90 km / h (1000 m / 1km) (1h / 3600 s) = 25 m / s
let's calculate
x = [tex]\frac{25^2}{2 \ 0.5}[/tex]
x = 625 m
what is fundamental interval
The difference between the values recorded in the thermometer at two fixed points known as Fundamental interval.
Ice is made of water so why does it float?
Answer:Its a Soild
Explanation:
A trombone acts as if it were an
open pipe of length 2.96 m. What
is the frequency of its fourth
harmonic?
(Speed of sound
343 m/s)
(Unit = Hz)
Answer:231.756757
Explanation:
(4)(343/2.96(2)= 231.756757
Answer:
The answer is 231.757 trust
Explanation:
star
Explain why you can see a phone underneath a glass bell jar, but you cannot hear
it when it is ringing?
Answer: Any sound cannot be heard through a glass bell jar because a vacuum is created in the jar and sound cannot travel without a medium like gases, solids or liquids
Answer:
the glass hids it and the vibration of the phone is the way you hear it
What is the dominant season in the low latitude belts? Question 6 options: Fall Spring Summer Winter
Answer:
dominant season is SUMMER
Explanation:
Latitude on the planet is the angle measurement from the so-called equator or midpoint of the Earth's sphere, therefore latitude values can range from 0º to 90º.
Low latitude values, values close to zero degrees, are very close to the central part of the planet, so when you plan to tilt in or orbit the Sun, this part is almost fixed, therefore the solar irradiation is very constant. throughout the year, consequently the dominant season is SUMMER
some sports or activities you can do to improve your overall health and how physical activity can improve your
physical and emotional health.
Answer:
some sports activities you can yo to improve your over all heath is running and how it can improve your emotional and physical heath is that it will get you heart beat up which will help you lose weight and make you feel better and how it can help your emotional health is that it can help you feel less stress mad angry and a bunch of other things
Explanation:
( the part were it says it will help lose weight is optional
2. A flywheel speeds up uniformly from rest to 900 rpm in 2 minutes. A) Find the angular
acceleration. B) Find the tangential acceleration of the rim if the flywheel has a 0.5 m radius.
Answer:
A) 450 B)3.5
Explanation:
10. Bites of some animals can cause
sprain
tetanus
rables
Answer:
an infection, including bacterial and rabies infections.
broken animal teeth embedded in your wound.
foreign objects embedded in your wound.
possible nerve and blood vessel damage.
Your car battery is a 12 V DC source. Typically you might find a fuse that can handle a 5 amp surge. What resistance is that fuse protecting?
Answer:
2.4 ohms
Explanation:
From the question,
Applying ohm's law,
V = IR.................... Equation 1
Where V = Voltage of the car battery, I = current, R = resistance
Make R the subject of the equation
R = V/I.................. Equation 2
Given: V = 12 V, I = 5 amp.
Substitute these values into equation 2
R = 12/5
R = 2.4 ohms
Calcular la aceleración que produce una fuerza de 40 N sobre un cuerpo con 88 Kg de masa. Expresar el resultado en m⁄s^2 *
Answer:
a = 0.45 m/s²
Explanation:
The given question is ''Calculate the acceleration that produces a force of 40 N on a body with 88 kg of mass".
Given that,
Force, F = 40 N
Mass of the body, m = 88 kg
The net force acting on the body is given by :
F = ma
Where
a is the acceleration of the body
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{40\ N}{88\ kg}\\\\a=0.45\ m/s^2[/tex]
So, the required acceleration is 0.45 m/s².
A person runs 2 laps around a 400 meter track and stops where they initially
began running. It took this person 3 minutes and 18 seconds to complete this
run. What is this persons average velocity?
A:4.04 m/s
B:2.02 m/s
c:0 m/s
The runner's total distance covered was 800 meters. Her displacement (straight-line distance between start-point and end-point) was zero.
Her average speed = (distance)/(time) = 4.04 m/s
Her average velocity = (displacement) / (time) = zero (choice - c)
What type of friction must
these boaters overcome to
move their boat through the
water?
A. Static
B. Fluid
C. Sliding
10) Which would be the most appropriate description of how energy is distributed when a torch is turned on?
A 70% light energy, 30% thermal energy
B 70% thermal energy, 30% electrical energy
C 65% light energy, 30% thermal energy
D 40% thermal energy, 55% light energy
On his way to school, a student starts out walking quickly and then slows down as he gets closer to the school. Which graph best
represents his motion?
A
B
C
D
' A ' is the graph that shows it.
120 J of work was done to lift an object 6 m above
the ground. How much force was applied to this
object and what was its mass?
Select one:
120 N, 5 kg
O
20 N, 3.04 kg
O
720 N, 12.3 kg
O 20 N, 2.04 kg
Answer:
The last option, 20 N and 2.04 kg
Explanation:
work = (force)(distance)
work = 120 joules
distance: 6 m
rearrange to find force:
120=(6)F
F= 120/6 = 20 Newtons.
Assuming its lifted from Earth's surface, the force of gravity will be 9.81 m/s^2. Let's find mass:
F=mg
m=F/g
m=(20)/(9.81)= 2.038 kg
The atmospheric pressure is 1 ATM.What does it mean?
Answer: the atmospheric pressure is generally expressed in terms of the height of the mercury column.at normal temperature and pressure, the barometric height is 760mm at sea level which is taken as one atmosphere. thus atmospheric pressure is also expressed in a unit atmosphere where 1 atm= 0.76m of hg. 9
Which represents an endothermic reaction? wood burning in a fire splitting a gas molecule using a heat pack on an injury TNT exploding
Answer:
b
Explanation:
The statement which represents an endothermic reaction is using a heat pack on an injury.
What is an endothermic reaction?An endothermic reaction is a type of chemical reaction that absorbs heat energy from the surroundings. In other words, in an endothermic reaction, energy is taken in from the environment as the reaction proceeds, resulting in a decrease in the temperature of the surroundings.
Endothermic reactions require an input of energy to occur, usually in the form of heat, light, or electricity. This energy is used to break the bonds between atoms or molecules in the reactants, and the products formed have higher potential energy than the reactants. The excess energy is absorbed from the surroundings to compensate for this increase in potential energy.
Examples of endothermic reactions include melting ice, evaporating water, and baking soda reacting with vinegar to produce carbon dioxide gas. These reactions require an input of energy to occur and absorb heat from the surroundings, resulting in a decrease in the temperature of the surrounding environment.
Here in this question,
Endothermic reactions absorb heat energy from the surroundings, meaning that they require energy input to proceed. In the case of using a heat pack on an injury, energy is required to activate the reaction that produces heat and provides warmth to the injured area. This process absorbs heat from the environment, making it an endothermic reaction.
In contrast, wood burning in a fire and TNT exploding are exothermic reactions because they release heat energy into the surroundings, which means that they produce heat as a byproduct. The splitting of a gas molecule is not an endothermic or exothermic reaction, but rather a chemical reaction that can be either endothermic or exothermic depending on the specific reaction and conditions involved.
Therefore, The correct answer is using a heat pack on an injury.
To find more on Exo and Endo thermic reaction click :
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What does mosquito larvae breathe out of
Answer:
Mosquito Larve commonly called wigglers live in water from 4 to 14 days depending on water temperature
help help help help help
Answer:
It is cold at saturn and far away
Explanation:
What is the best definition of solar radiation?(giving brainliest)
-Storing of energy in Earth's oceans
-Energy from the Sun that reaches Earth
-Moisture and heat energy in the atmosphere
-Increased evaporation due to warm water
4. Un móvil lleva una velocidad de 75 m/s, en dicho momento aplica los frenos durante tiempo de 15 segundos hasta detenerse. ¿cuál será la aceleración del frenado? ¿cuál es la distancia que recorre hasta detenerse?
Answer:
a = 5 m / s² and x = 562.5 m
Explanation:
Let's apply the kinematics relations
v = v₀ + at
v² = v₀² + 2a x
In this case, as the car stops, its final speed is zero (v = 0) and the acceleration must be opposite to the speed, that is, negative
0 = v₀ - a t
a = v₀ / t
let's calculate
a = 75/15
a = 5 m / s²
let's look for the distance
0 = v₀² - 2a x
x = v₀² / 2a
let's calculate
x = [tex]\frac{75^2}{2 \ 5 }[/tex]
x = 562.5 m
Valerie and Greg want to bake a cake. They mix the cake batter and preheat the oven. Once the oven reaches the right temperature, they pour the batter in a cake pan, put it in the oven, and close the door. They know that while the cake is in the oven, a chemical change that involves energy occurs. Which of these statements describes the amount of energy in the oven while the cake is baking?
Answer: They know that while the cake is in the oven, a chemical change that involves energy occurs.
Explanation:
The total amount of energy stays the same, but it changes from one form to another. The correct option is D.
What is law of conservation of energy?According to the rule of conservation of energy, energy can only be transformed from one form of energy to another and cannot be created or destroyed.
This indicates that unless energy is added from the outside, a system always has the same quantity of energy.
The law of conservation of energy, which is found in physics and chemistry, stipulates that the total energy of an isolated system stays constant over time.
Greg and Valerie want to make a cake. They prepare the oven and mix the cake mixture. They are aware that a chemical shift involving energy takes place while the cake is baking.
Energy shifts from one form to another, yet its overall amount remains constant.
Thus, the correct option is D.
For more details regarding law of conservation of energy, visit:
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A. The total amount of energy will either increase or decrease, depending on how much cake batter there is.
B. The total amount of energy increases because the oven gets very hot.
C. The total amount of energy decreases because it changes into matter.
D. The total amount of energy stays the same, but it changes from one form to another.
Calculate the charge that flows through the cell in 1 minute. Each filament lamp has a power of 3 W and a resistance of 12 Ω
Answer:
24 Coulumbs
Explanation:
Given data
time= 1 minute= 6 seconds
P=2 W
R= 12 ohm
We know that
P= I^2R
P/R= I^2
2/12= I^2
I^2= 0.166
I= √0.166
I= 0.4 amps
We know also that
Q= It
substitute
Q= 0.4*60
Q= 24 Columbs
Hence the charge is 24 Coulumbs
Answer:
30C
Explanation:
its basically how the other guy did it but he worked it out with 2W instead of 3W so he got it wrong so its 30C and not 24C
How is Venus similar to Earth?
Both have the same day length.
Both rotate in the same direction.
Both have ample water on their surfaces.
Both have a solid inner core and a liquid outer core.
Answer: D
Explanation: I have my answers VS. Go0gle answers (go0gle answers are pics)
(A) Both have the same day length. Well, Venus doesn't havve the same amount of days. (I already know off the top of my head, but I still searched it up)
(B) Both rotate in the same direction. In school (before Virus) they would always show diagrams of the planets on the projector and Venus doesn't rotate
(C) Both have ample water. No. Venus doesn't have much water >_>
(D) Both have a solid inner core and a liquid outer core. Yesh. In my lessons (before), Venus has a solid inner core and liquid outer core.
Un cuerpo de 480 g de masa es atraído con una fuerza de 3.9 E-6 N por otro cuerpo de 196 g de masa. Calcula la distancia a la que se encuentran.
Answer:
La distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.
Explanation:
Asumamos que ambos cuerpos son partículas, la fuerza de atracción ([tex]F[/tex]), en newtons, entre ambos cuerpos se define mediante la Ley de Newton de la Gravitación Universal, cuya ecuación es:
[tex]F = G \cdot \frac{m_{1}\cdot m_{2}}{r^{2}}[/tex] (1)
Donde:
[tex]G[/tex] - Constante de la gravitación universal, en metros cúbicos por kilogramo-segundo cuadrado.
[tex]m_{1}, m_{2}[/tex] - Masas de los cuerpos, en kilogramos.
[tex]r[/tex] - Distancia entre los cuerpos, en metros.
Si sabemos que [tex]G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}[/tex], [tex]m_{1} = 0.48\,kg[/tex], [tex]m_{2} = 0.196\,kg[/tex] y [tex]F = 3.9\times 10^{-6}\,N[/tex], entonces la distancia entre los dos cuerpos es:
[tex]r = \sqrt{\frac{G\cdot m_{1}\cdot m_{2}}{F} }[/tex]
[tex]r \approx 1.269\times 10^{-3}\,m[/tex]
Es decir, la distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.
What causes a snowflake to melt on your tongue?
Answer:
thermal energy
Explanation:
heat transfers into it causing it to physically change
Answer:
A pesar de las diferencias entre cada copo de nieve y las grandes familias de copos que existen, estos todavía tienen una base hexagonal. Esta estructura hexagonal se explica por la forma en que las moléculas de agua se unen para formar un cristal
Despite the differences between each snowflake and the large families of flakes that exist, they still have a hexagonal base. This hexagonal structure is explained by the way in which water molecules come together to form a crystal.
Explanation:
mn
Identify the process shown in the given picture A and B and differentiate between the two processes.
please give answer fast
a sound effect balloon is
Answer:
Hey mate...
Explanation:
This is ur answer...
A balloon sound effect is pop or bang....
hope it helps you,
Follow me
Answer:
Popping sound
Explanation:
It gives a pop sound when it blows off
A 86g ball is dropped vertically to the floor from a height of 2.87m and bounces to a height of 1.28. What is the magnitude of the impulse received by the ball from the floor during the bounce
Answer:
The impulse received by the ball from the floor during the bounce is approximately 1.11329438 m·kg/s
Explanation:
The given mass of the ball, m = 86 g = 0.089 kg
The height from which the ball is dropped, H = 2.87 m
The height to which the ball bounces, h = 1.28 m
Mathematically, we have;
Δp = F·Δt
Where;
Δp = The change in momentum = m·Δv
F = The applied force
Δt = The time of contact with the force
The velocity of the ball just before it touches the ground, v₁ = -√(2·g·H)
The velocity with which the ball leaves, v₂ = √(2·g·h)
The change in momentum, Δp = m·(v₂ - v₁)
∴ Δp = m·(√(2·g·h) - (-√(2·g·H))) = m·(√(2·g·h) +√(2·g·H) )
The impulse, Δp, received by the ball from the floor during the bounce is given as follows;
Δp = 0.089 kg × (√(2 × 9.8 m/s² × 1.28 m) + √(2 × 9.8 m/s² × 2.87 m)) ≈ 1.11329438 m·kg/s
The impulse received by the ball from the floor during the bounce, Δp ≈ 1.11329438 m·kg/s
Explain you could use a battery, wire and compass to
determine whether or not the right hand rule works.
ASSAP PLEASE
Answer:
oh I'm so sorry I can't answer your question it has been a long time since I learned that. so I totally forgot how to do this. sorry!