Answer:
An atom that loses one or more valence electrons to become a positively charged ion is known as a cation, while an atom that gains electrons and becomes negatively charged is known as an anion.
Explanation:
Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus.
an electric car is being driven through a town at 22m/s the kinetic energy of the car is 222640 J calculate the mass of the car
The mass of the car at the given kinetic energy is 920 kg.
The given parameters;
initial velocity of the car, u = 22 m/skinetic energy of the car, K.E = 222,640 JKinetic energy if the energy acquired by a body during its motion. This kinetic energy is the product of average velocity squared and mass of the object.
The mass of the car at the given kinetic energy is calculated as follows;
[tex]K.E = \frac{1}{2} mv^2\\\\mv^2 = 2K.E \\\\m = \frac{2K.E}{v^2} \\\\m = \frac{2 \times 222,640}{(22)^2} \\\\m = 920 \ kg[/tex]
Thus, the mass of the car at the given kinetic energy is 920 kg.
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The velocity of a bus increases from 27km/h to 30m/s in . Calculate its acceleration.
Answer:
No time interval???
Explanation:
convert from km/h to m/s (speed)
27×1000/3600
27000/3600
=7.5m/s
a= v-u/t
v(final velocity) is 30m/s, u(initial velocity) is 7.5m/sa= 30-7.5/t
a= 22.5/t (m/s²)
SELECT ALL of the TRUE statements about voltage:
Voltage is like water pressure in a pipe.
Voltage is what "pushes" electrons through a circuit
Voltage is the potential difference between (+) and (-) charges
Assuming the resistance in a circuit stays the same, the greater the voltage, the more current can flow through a circuit.
Answer:
All of the above
Explanation:
I saw this on an EdPuzzle.
Explain why it is advisable to charge a car battery with small current over a long period of time than high current within a short time
Answer:
Minimize the heat
Explanation:
heat = square of current X R X t
so as I decreases heat decreases
A ball is thrown horizontally with an initial velocity of 5.0 meters per second.
The ball travels 15 meters horizontally before it lands. What vertical height
was it thrown from?
Hi there!
We can begin by calculating the total time of the ball's projectory:
t = d/v
t = 15/5 = 3 sec
We can use the simplified kinematic equation for time:
t = √2h/g
Rearrange to solve for h:
t² = 2h/g
gt² = 2h
gt²/2 = h
Plug in the values: (g = 9.8 m/s²)
9.8(3)² / 2 = 44.1 m
If a car's velocity increases to 30 m/s from rest in 6.0 seconds, what is the acceleration?
Hi there!
We can use the following equation to derive acceleration:
vf = vi + at, where:
vi = 0 m/s (starts from rest)
a = acceleration
time = time (sec)
Rewrite:
vf = at
Solve for acceleration:
vf/t = a
30/6 = 5 m/s²
3. A rescue plane drops a package to a stranded party of explorers. The plane is traveling horizontally at a velocity of
100.0 m/s at a height of 50.0 m above the ground.
a. How long will it take for the package to hit the ground?
Hi there!
For this part, we can disregard the horizontal velocity because horizontal and vertical motion are INDEPENDENT.
We can used the simplified equation to solve for time:
[tex]t = \sqrt{\frac{2h}{g}}[/tex]
Where:
h = height
g = acceleration due to gravity (assume g = 10 m/s²)
Plug in given values:
[tex]t = \sqrt{\frac{2(50)}{10}} = \sqrt{10}[/tex]
t ≈3.162 sec
.) Explain what an indepent variable is
Explain what an
dependent variable
Answer:
An independent variable is a variable that stands alone and isn't changed by the other variables you are trying to measure.
A dependent variable is something that depends on other factors.
the sound _____ of these vibrations passes along the string
Answer:
This results in a wave of vibrations travelling through the air to the ... such as the medium it travels through and the strength of the initial vibration
Explanation:
Answer:
The sound waves of these vibrations passes along the string.
what is nuclear energy and write down it's two applications of this type of energy?
Background: Nuclear energy can be used for various industrial applications, such as seawater desalination, hydrogen production, district heating or cooling, the extraction of tertiary oil resources and process heat applications such as cogeneration, coal to liquids conversion and assistance in the synthesis of chemical ...
what does it mean to say thay the forces acting on an object are balanced
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces. Hopefully this helps, have a nice day! :D
How does resistance affect the flow of current in a connecting wire?
Answer:
Resistance affect the flow of current in a connecting wire because there is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area.
Why is density such an important physical property?
Answer:
Density is important because it determines what substances floats and sinks.
Explanation:
An object is pulled up an incline plane at a constant velocity as the picture above shows. Calculate the tension on the rope.
A. 377 N
B. 502 N
C. 305 N
D. 545 N
Hi there!
[tex]\large\boxed{545N}[/tex]
Since the object is being pulled at a constant velocity, the forces must be balanced.
Since there is no movement vertically, we must take into account the horizontal forces. We can also assume a positive acceleration to be in the direction of motion.
The acceleration and force due to gravity on an incline is:
a = gsinФ
F = MgsinФ
∑F = -MgsinФ + T
Since it is getting pulled at a constant velocity, ∑F = 0. So:
0 = -MgsinФ + T
MgsinФ = T
Solve for T by plugging in values. Let g = 10 m/s²
T = (120)(10)sin(27) ≈ 545 N
A boy is watching his grandfather fire an old cannon. He notices that whenever the
cannonball is fired, it moves with a very high velocity to the right. He also notices
that when the cannonball is fired, the cannon moves very slowly to the left. How
does conservation of momentum explain these observations?
v cannon
V cannonball
Since the motions of the cannon and cannon ball were caused by the same
event, they must have equal and opposite momentum. Since the cannon has
much more mass, it will have a larger velocity.
The total momentum of the system was zero before the cannon was fired, so
the cannonball and cannon must have equal and opposite momentum. Since
the cannon has much more mass, it will have a smaller velocity.
The cannon gave momentum to the cannon ball, so they both begin to move.
Since the cannon has much more mass, it will have a smaller momentum.
The cannon gave momentum to the cannon ball, so they both begin to move.
Since the cannonball has much less mass, it will have a smaller momentum.
Answer:
since the cannon ball has much less mass it will have a smaller momentum.
The system's total momentum was zero before the cannon was fired, the momentum of the cannonball and the cannon must be equal and opposing. Since the cannon has much more mass, it will have a smaller velocity.
What is momentum?The combination of a particle's mass and velocity produces momentum. Momentum has both a direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.
Since there is no external force acting on the system, momentum ought to be conserved in accordance with the law of conservation of momentum.
Since we are aware that momentum is determined by a formula
M = [tex]mass * velocity[/tex]
Here M is the momentum.
Since the system's total momentum was zero before the cannon was fired, the momentum of the cannonball and the cannon must be equal and opposing. The cannon will have a lower velocity because it has a lot greater mass.
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what happens to particles when p waves and s waves pass through them?
Answer:
Particles are squeezed together and pushed apart by P waves. Particles slide past each other in a crosswise direction as S waves pass through them.
during low-intensity activity, your body obtains most of its energy from
how long does it take for the moon to rotate around the earth
Answer:
27,32 dia
Explanation:
answer asap!!
---------------
Answer:
conduction
Explanation:
............................
make a list of different types of energy sources found in our surroundings and categorize them into different form of energy.
Answer:
Energy types are sound, thermal, kinetic, electric, potential energy etc.
Explanation:
A block is dragged along the following surfaces. Which would result in the greatest kinetic friction force?
highly polished table
rough table
sandpaper
The kinetic force would be equal for all surfaces.
Answer:b
Explanation:
The greatest kinetic friction force occurs when the block is dragged along Sand paper
Kinetic friction is defined as the force of friction that exists between two surfaces in contact as one surface moves over the other.
Many factors affects the magnitude of frictional force and prominent among those factors is the nature of a surface. Rough surface cause a greater frictional force than smooth and highly polished surfaces or smooth surfaces.
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Fun fact
An apple, potato, and onion all taste the same if you eat them with your nose plugged
thats epic my guy jsjsjdjdjd
Answer:
false I think
Explanation:
WILL MARK BRAINLIEST
A boy sledding down a hill accelerates at
1.29 m/s2
If he started from rest, in what distance
would he reach a speed of 6.87 m/s?
Answer in units of m.
Answer:
Explanation:
Explanation: In order for us to know how long it takes for the speed to be reached, we use the equation V= Vo + at, with V=6.87m/s, Vo= 0m/s since you start from rest and a=1.29m/s². T is the time in seconds that we want to find out.
6.87 = 0 + 1.29t
6.87 = 1.29t
t= 5.33s
Now, we want to know the distance this boy reaches in 5.33 seconds, in a 7m/s speed and accelarating in 1.29m/s². For finding this out, we use another equation, S = So + Vot + (at²)/2, S being the final distance, So = 0m because he started from rest, and the other variables used before.
S = 0 + 0*5 + [1.29*(5.33²)]/2
S = 0 + 0 + (1.29*28.40)/2
S = 36.64/2
S = 18.32m
**WRITE SHORT ANSWER**
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Ans =
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES
Ans =
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID
Ans =
Answer:
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Advantage: Alcohol has a high expansivity.
Disadvantage: Alcohol is not opaque, this may give wrong temperature readings.
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES :
Answer: Solids have stronger intetmolecular forces of attraction than gases.
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID :
Answer: Decreasing the volume of the container containing the liquid. This will increase vapour pressure as well the rate of evaporation .
[tex].[/tex]
WRITE ONE ADVANTAGE AND ONE DISADVANTAGE OF ALCOHOL AS A LIQUID USED IN THERMOMETERS
Advantage: Alcohol has a high expansivity.
Disadvantage: Alcohol is not opaque, this may give wrong temperature readings.
DIFFERENCE IN FORCES BETWEEN SOLID AND GAS PARTICLES :
Answer: Solids have stronger intetmolecular forces of attraction than gases.
TWO FACTORS TO INCREASE RATE OF EVAPORATION IN LIQUID :
Answer: Decreasing the volume of the container containing the liquid. This will increase vapour pressure as well the rate of evaporation .
I need some help
a golfer can hit a golf ball 300 m horizontally. what maximum height would a 301.5 meter drive reach if it was launched at a 25 degree angle above the ground
This question involves the concepts of projectile motion, horizontal range, and height.
The maximum height reached by the ball is "35.15 m".
First, we will find out the launch velocity of the projectile motion of the ball, by using the formula of the horizontal range:
[tex]R= \frac{u^2Sin\ 2\theta}{g}\\\\[/tex]
where,
R = horizontal range = 301.5 m
u = launch speed = ?
θ = launch angle = 25°
g = acceleration due to gravity = 9.81 m/s²
Therefore,
[tex]301.5\ m = \frac{u^2Sin\ 50^o}{9.81\ m/s^2}\\\\u = \sqrt{\frac{(301.5\ m)(9.81\ m/s^2)}{Sin\ 50^o}}[/tex]
u = 62.14 m/s
Now, we will find out the maximum height (H) of the projectile motion, using the following formula:
[tex]H = \frac{u^2Sin^2\theta}{2g}\\\\H =\frac{(62.14\ m/s)^2Sin^2(25^o)}{2(9.81\ m/s^2)}[/tex]
H = 35.15 m
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The attached picture shows the projectile motion.
1. How does the mass of Jupiter compare to Earth?
2. How quickly does it rotate on its axis?
3. What makes the different bands on the planet?
Answer:
1.
Jupiter is the largest planet in the solar system. (Image credit: NASA)
The largest planet in the solar system, the gas giant Jupiter is approximately 318 times as massive as Earth. If the mass of all of the other planets in the solar system were combined into one "super planet," Jupiter would still be two and a half times as large.
2.Rotation of Jupiter
[/caption]
Jupiter has the fastest rotation of all the planets in the Solar System, completing one rotation on its axis every 9.9 hours.
3.Jupiter, the King of the Planets, is a gas giant, which means that it's made mostly of gases like hydrogen and helium, and that it doesn't have a solid surface in the way that rocky planets like Earth do. With a temperature of 130 K (-140 C, -230 F), it's so cold that it gives off most of its energy in the infrared. In fact, Jupiter gives off almost twice as much heat as it receives from the Sun. It's able to do this because it has its own internal heat source, powered by the slow gravitational collapse that started when the planet first formed. Astronomers estimate that Jupiter is currently shrinking by almost 2 cm per year
an orthodontic spring, connected between the upper and lower jaws, is adjusted to provide no force with the mouth open. when the patient closes her mouth, however, the spring compresses by 6.0 mm.
Answer:
0.96 N
Explanation:
A girl runs at an average speed of 6 m/s for 12 s. How far does she go in 12 s?
Explanation:
Distance= speed × time
= 6 × 12 m
= 72 m
the energy for building a proton gradient is provided by
Answer:
The electrons from from NADH and FADH2 flow through the electron transport chain in the inner mitochondrial membrane generating a H+ buildup in the inner membrane space. This proton gradient (gradient of H+) flowing through the membrane enzyme complex ATP synthetase is the direct energy source for producing ATP.
Explanation:
answer asap asap!
-----------------
Answer:
Neutral
Explanation:
A neutral atom has an equal number of protons and electrons so that the positive and negative charges exactly balance. Since it is the electrons that determine how one atom interacts with another, in the end it is the number of protons in the nucleus that determines the chemical properties of an atom.