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 student wants to use a simple machine to remove a bottle cap.
What is the best simple machine for this task?
a. inclined plane
b. pulley
c. lever
d. screw
Answer:
inclined plane
is the answer::::::)))
Answer:
d.
Explanation:
screw
An inclined plane wrapped around a cylinder or cone. a conmon use of the screw is to hold objects together, examples include a jar lid and wood screw. A compound machine is s combination of two or more simple machines
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 ...
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 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.
Learn more: https://brainly.com/question/19676397
**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 .
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
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
Identifying What are five things
that must be true in order for
a substance to be considered a
mineral?
Answer:
1. Naturally occuring
2. Solid
3. Inorganic
4. Crystalline
5. Specific Chemical Compostion
Explanation:
Minerals are inorganic, crystalline solids that occur during biogeochemical processes in nature like in cooled lava or evaporated sea water. Minerals are not rocks, but are actually the components that make up rocks. Though they vary in color and shape, each mineral has a distinct chemical composition.
1. Minerals are formed by natural geological processes. Most minerals form from molten lava, sea evaporation or hot liquids in caves or cracks. Laboratory-generated minerals like synthetic gems made for commercial purposes are not considered actual minerals.
2. Though minerals vary in shape, color, luster (the way a mineral reflects light) and hardness, all minerals are a solid at a given temperature. If a substance is not in its solid state, it is not currently a mineral. For example, ice is a mineral, but liquid water is not. The Mohr scale, rates a minerals hardness from one to 10, 10 being the hardest. Diamond is the hardest mineral. Talc is a very soft mineral with a Mohr rating of one.
3. Minerals are wholly inanimate, inorganic compounds. But there are exceptions to this qualifier. There are rare organic substances with definitive chemical compositions that are labeled as “organic minerals." The most famous of this oxymoronic exception is whewellite. Whewellite is a component of kidney stones and coal deposits.
4. Most minerals will grow into a crystal shape, space permitting. Mineral deposits are often small because there is usually a variety of minerals in the same vicinity competing for the same room to grow. A mineral’s crystalline structure determines its hardness, cleavage (how it breaks) and color. There are six different crystal shapes: cubic, tetragonal, orthohombic, hexagonal, monoclinic and triclinic.
5. A mineral is defined by its chemical composition. A rock, on the other hand, does not have a specific chemical composition because it is a composite of a variety of minerals. Minerals are classified based on their anionic group. The major mineral groups are native elements, sulfides, sulfosalts, oxides and hydroxides, halides, carbonates, nitrates, borates, sulfates, phosphates and silicates. Silica is abundant in the Earth’s crust, so silicates are the most common group of mineral.
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:
how long does it take for the moon to rotate around the earth
Answer:
27,32 dia
Explanation:
For your muscles to get stronger, or your body to get fit, you must work harder when exercising than when you are at rest.
Question 2 options:
Overload
Specificity
Progression
Regularity
Answer:
Overload
Explanation:
during low-intensity activity, your body obtains most of its energy from
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.
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
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 gyroscope is a wheel or disk that spins rapidly around two or more axes. Question options: True False
the answer is false
Answer: false
Explanation:
.) 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.
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:
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.
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
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
Why is the magnetic force considered to be an action-at-a-distance force?
a
Magnets must be far apart in order to exert a force.
b
Magnets do not have to touch each other to experience a force.
c
Magnets push each other apart to increase the distance between them.
d
Magnets must be large in size in order to exert a force that is strong enough to notice.
CAN YOU BRAINLEST ME
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:
Damage to the thalamus would be least likely to affect our
This can cause sensory problems, but it can also lead to behavioral and cognitive changes.
(hope this helps you) :)
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.
Drag each tile to the correct location.
Based on the following statements, determine whether the relative age or absolute age for the events are known:
• Harrison was born 7 years ago, but his sister Meredith was born long before then.
The tree in Jasmine's yard has been there longer than her house has, and her house was built 85 years ago.
The triceratops went extinct 65 million years ago, long after the stegosaurus went extinct.
Relative Age
Absolute Age
Harrison's
birth
Meredith's
. birth
the planting of
Jasmine's tree
the building of
Jasmine's
the extinction of the
triceratops
the extinction of the
stegosaurus
house
Answer:
Relative: meredith's birth, the planting of jasmine's tree, and the extinction of the stegosaurus
Absolute: harrison's birth, the building of jasmine house, and the extinction of the triceratops
Explanation: plato
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
True or false? Electrons can move, but positive charges can't.True or false? Electrons can move, but positive charges can't.
Answer:
true
Explanatio
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