Answer:
1.8 secondsExplanation:
Initial velocity (u) = 0 m/s[Since, it is at rest. ]
Acceleration (a) = 0.0075 m/s²Final velocity (v) = 0.0135 m/s²We are asked to calculate time taken to reach a speed of 0.0135m/s.
By using the first equation of motion,
→ v = u + atv denotes final velocityu denotes initial velocitya denotes accelerationt denotes time takenSubstituting values,
→ 0.0135 = 0 + 0.0075t
→ 0.0135 = 0.0075t
→ 0.0135 ÷ 0.0075 = t
→ 1350000 ÷ 750000 = t
→ 135 ÷ 75 = t
→ 1.8 = t
→ Time taken = 1.8 secondsTherefore, it takes 1.8 seconds to reach a speed of 0.0135m/s.
ASAP will do brainiest 22 points PLSS HELP
Sports such as football, baseball, soccer, horseback riding, tennis, volleyball, skateboarding, and surfing (to name a few) are full of examples of Newton’s Three Laws of Motion. To answer this question: 1. Choose any sport. Write down the name of the sport. 2. In your own words, state each of Newton’s 3 Laws of Motion and give a clear, specific example of how each law applies to the sport you have chosen.
Answer:
tenis
Tenis applies to each of Newton's 3 Laws of Motion because with the first law if a tenis ball is at rest it will stay at rest unless acted on by an unbalanced force which would be playing tenis in which it would stay in motion. The second law applies since the acceleration at which it is hit times the mass equals the force it has. The third law applies since when hitting a tenis ball back and forth with racquets the reaction may be equal or opposite
A motor is used to pump water from a depth of 5m to fill a volume of 10cubic meter in 5 min . If 50 percent of the power is wasted , What is the power of the motor?
6.) What is the missing element?
a. Hydrogen
b. Helium
c. Carbon
d. Nitrogen
Answer:
It's nitrogen. Specifically, this is the alpha emission of an N-15 isotope.
What is the major function of Eustachain tube of ear?
Answer:
Explanation:
Eustachian tube is located in between the middle ear and the nasopharynx.It's function is to control the pressure within the middle making it equal to the air pressure outside the body.
Is it important to constantly stay connected for you?
Answer:
no
Explanation:
A rock is thrown down from the top of a cliff with a velocity of 3.61 m/s (down). The cliff is 28.4 m above the ground. Determine the velocity of the rock just before it hits the ground.
The velocity of the rock just before it hits the ground is approximately 23.87m/s.
What is the velocity of the rock just before it hits the ground?From the third equation of motion;
v² = u² + 2gs
Where u is initial velocity, v is final velocity, g is acceleration due to gravity ( g = 9.8m/s² ) and s is distance covered.
Given the data in the question;
Initial velocity u = 3.61m/sHeight of cliff s = 28.4mFinal velocity v = ?To determine the final velocity, plug the given values into the equation of motion above.
v² = u² + 2gs
v² = ( 3.61m/s )² + ( 2 × 9.8m/s² × 28.4m )
v² = 13.0321m²/s² + 556.64m²/s²
v² = 569.6721m²/s²
v = √( 569.6721m²/s²)
v = 23.87m/s
Therefore, the final velocity of the object is 23.87m/s.
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Ohm's law states which relationship between electrical quantities? a. Volts = current x resistance b. Volts = current divided by amps c. Volts = coulombs divided by charge d. Volts = resistance times charge
Answer:
a. Volts = current x resistance
Explanation:
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
Hence, Ohm's law gives the relationship between voltage, current and resistance of an electric circuit.
Calculate the mass number of an atom with 8 protons, 12 neutrons and 10 electrons
Answer: 20
Explanation: Mass number is the number of neutrons plus the number of protons. 8 + 12 gives 20.
Mass number
No of protons+No of neutrons12+820Mass number is 20
For the mirror configuration below, the angle of incidence for the going towards the mirror on the right is 15 degrees. What is the angle of reflection for the light ray leaving the mirror on the bottom
Answer:
Thus, the angle of reflection is 15 degrees.
Explanation:
Angle of incidence, i = 15 degrees
The angle of incidence is the angle between the normal to the mirror and the incident ray, the angle of reflection is the angle between the reflected ray and the normal to the mirror.
According to the laws of reflection, the angle of incidence is equal to the angle of reflection.
Thus, the angle of reflection = angle of incidence = 15 degrees
0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t 0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck ( magnitude and direction) after a force of 25.0 N directed to the right has been applied for 0.050 s. (b) If, instead, a force of 12.0 N directed to the left is applied from 0 tot 0.050s, what is the final velocity of the puck
Answer: [tex](a)10.812\ m/s\ (b)\ 0.75\ m/s\ \text{left}[/tex]
Explanation:
Given
Mass of hockey puck [tex]m=0.160\ kg[/tex]
Initial velocity of hockey puck is [tex]u=3\ m/s[/tex]
First a horizontal force of [tex]25\ N[/tex] is applied to the right for [tex]0.05\ s[/tex]
acceleration associated with it is
[tex]\Rightarrow a=\dfrac{25}{0.160}\\\\\Rightarrow a=156.5\ m/s^2[/tex]
Using equation of motion i.e.
[tex]\Rightarrow v=u+at\\\Rightarrow v=3+156.25\times 0.05\\\Rightarrow v=3+7.812\\\Rightarrow v=10.812\ m/s[/tex]
(b) When a force of [tex]12\ N[/tex] is applied for 0.05s
Using equation of motion i.e.
[tex]\Rightarrow v=3-\dfrac{12}{0.160}\times 0.05\\\\\Rightarrow v=3-75\times 0.05\\\Rightarrow v=3-3.75\\\Rightarrow v=-0.75\ m/s\\\Rightarrow v=0.75\ \text{towards left}[/tex]
A 15kg dog jumps out of a 40 kg canoe. If the dog's velocity is 1.2 m/s, what is the velocity of the canoe
Answer:
the velocity is 0.45 m/s and it is moving in the opposite direction
or
-0.45 m/s
Explanation:
The law of conservation of momentum says that initial momentum = final momentum
( mass x velocity of the dog ) = - (mass x velocity of the canoe)
(15 x 1.2) =- (40 x velocity of the canoe)
Velocity of the canoe = -(15 x 1.2) / 40 = -0.45 m/s
Do metals that react vigorously with hydrochloride acid also react vigorously with sulfuric acid?
Answer:
yes
Explanation:
Reactions of acids with metals
Acids react with most metals and, when they do, a salt is produced. But unlike the reaction between acids and bases, we do not get water. Instead we get hydrogen gas.
This is the general word equation for the reaction:
metal + acid → salt + hydrogen
For example, magnesium reacts with hydrochloric acid to produce magnesium chloride:
magnesium + hydrochloric acid → magnesium chloride + hydrogen
Mg + 2HCl → MgCl2 + H2
It doesn't matter which metal or which acid is used, if there is a reaction we always get hydrogen gas as well as the salt. However, how quickly the reaction goes depends on the metal used and how high up in the reactivity series it is.
The diagram shows the electric field near conducting sphere a which of the following statements is correct
What is total internal reflection?
Answer:
When a ray of light, passes from a denser to a rarer medium with the angle of incidence greater than the critical angle, the ray is reflected back into the same medium. This phenomenon is call total internal reflection.
Sound travels through air at 343 m/s at 20 °C. A bat emits an ultrasonic squeak and hears the echo 0.05 second later . How far away was the object that reflected it?
Answer:
8.575 m
Explanation:
speed = distance/time
distance -- 2d
343 = 2d/0.05
2d = 17.15
d = 17.15/2
d = 8.575
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A __________ is a push or pull.
Answer:
force
Explanation:
Force is a push or a pull of an object that causes the object to speed up, slow down, or stay in one place. In other words, a force is what causes an object to move. Friction and gravity are two types of forces that influence how an object moves.
John and Henry push a piano with 800N, and the piano refuses to move. According to the definition of work in physics, there is NO work done on the piano.
Answer:
Explanation:
This is true because the definition of work is the parallel force required to move an object times the distance it moves. If it doesn't move, no work has been done. That is not to say that no energy has been expended, because it most certainly has! But that is not the same thing.
Rex decides to launch a priceless vase into the air at a 90-degree angle. The initial velocity vase is +7.0 m/s. Dylan claims that the vase would achieve a higher height if it were launched at a 45-degree a Dylan correct? A. Dylan is correct because a 45-degree launch angle results in the largest vertical range B. Dylan is correct because larger launch angles result in a smaller vertical range. C. Dylan is incorrect because a 90-degree and 45-degree launch angle result in the same range. D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Answer:
D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Explanation:
Projectile is the motion of an object thrown into space. When an object is thrown into space, the only force which acts on it is the acceleration due to gravity.
An object thrown into space would reach maximum height (vertical range) if it is launched at an angle of 90 degrees. For maximum horizontal range, the object needs to be launched at an angle of 45 degrees.
Therefore Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
The correct statement is
D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Information regarding projectile:It is the object motion that should be thrown into space. At the time when the object is thrown into space, the only force that should act on it represent the acceleration because of gravity.
Since object thrown into space should have to reach maximum height in the case when it is launched the 90 degrees angle. Due to the above reasons, option D is considered.
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The speed of light in a piece of plastic is 1.87 × 10^8 meters per second. What is the absolute index of refraction of this plastic?
Question 11 options:
1.00
1.6
0.67
1.33
[tex]\tt\red{See \; Your \: Answer!}[/tex]
Your answer was 0.67m...
Which of the following characteristics were not included in John Dalton's description of the atom? A. In any element, all the atoms are the same. B. Atoms are smaller than quarks. C. All matter is made up of atoms. D. Atoms exist only on Earth. E. Elements in a compound are always in a constant ratio. NO LINKS OR VIRUSES PLS
Answer:
d
Explanation:
atoms exits everywhere
Answer: The correct choices to this question are, "B. Atoms are smaller than quarks," and "D. Atoms only exist on earth." Hope this helped.
How much kinetic energy is required to break through?
Explanation:
The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth
All objects on earth experience a force of gravity that pulls objects "downward" towards the center of the earth. The force of gravity acting on a person is 1000 N down and the force of air resistance is 215 N up. Find the net force.
Answer:
The net force is 785 N
Explanation:
The net force = Force in one direction - force in the opposite direction
Here the Downward force due to gravity = 1000N
and the Upward force of air = 215 N
The net force = Downward force due to gravity -Upward force of air
Substituting the given values, we get -
The net force = 1000 -215 = 785 N
Hence, the net force is 785 N
Answer:
I am in 8th grade, and I am learning this, and it is kinda hard, but I appreciate all these people helping people answer thee hard science problems
Who knows the answers to this’s problems
Answer:1. High Intensity Interval Training
HIIT stands for High Intensity Interval Training. HIIT is essentially a type of exercise, be it cardio or resistance training. HIIT. alternates between periods of high intensity, and low intensity (or recovery
2. flexibility and muscular strength
3. true
4. d
5. c
Explanation:
After hearing about an accident on his normal route, Mr. Gujral checks for alternate routes to get to work. What type of circuit does this traffic situation model?
Answer:
C
Explanation:
a parallel circuit because there is more than one path
Answer:
C) a parallel circuit because there is more than one path
Explanation:
EDGE 2022
Which calculates the intensity of an electric field at a point where a 0.50 C charge experiences a force of 20. N?
Answer: [tex]40\ N/C[/tex]
Explanation:
Given
Magnitude of charge is [tex]q=0.5\ C[/tex]
Force experienced is [tex]F=20\ N[/tex]
Electric field intensity is the electrostatic force per unit charge
[tex]\therefore E=\dfrac{F}{q}\\\\\Rightarrow E=\dfrac{20}{0.50}\\\\\Rightarrow E=40\ N/C[/tex]
Thus, the electric field intensity is [tex]40\ N/C[/tex]
what energy is required to remove the electron from a hydrogen atom in the n=11 state? Let the constant hcR=13.6
A) 0.11 eV
B) 0.080 eV
C) 0.094 eV
D) 0.14 eV
E) 0.17 eV
Answer:
the answer is letter A im not sure
5. Which energy transformation would friction
cause on a moving train?
A. kinetic energy into thermal energy
B. potential energy into sound energy
C. kinetic energy into potential energy
D. thermal energy into potential energy
Answer:
Fossil fuels store energy from the sun as
Explanation:
laser with wavelength 633 nm illuminates a single slit of width 0.185 mm. The diffraction pattern is seen on a screen. The distance between the first and second dark fringes is 8.25 mm. How far is the screen from the slit
A student pulled a 100 kg cart up a ramp using a force of 150 N. By the time the cart reached the top of the ramp, it had gained 980 joules of potential energy. What happened to the work the student did by pulling the cart?
Answer:
Some of the work done on the cart became the cart’s potential energy, and some of the work was converted into heat by friction.
Explanation:
Here, some fraction of the work done by the student on the cart is converted to the potential energy of the cart it gained at the height.
What is work done ?Work done is the measure of the effectiveness of the force on making some displacement. It is the dot product of force and displacement. Work done like force is a vector quantity and have magnitude and direction.
When a force applied on a body results in a displacement, then it is said to be work is done on the body. The work done is numerically equal to the energy needed to displace the object.
Here, the force applied on the cart of 100 Kg results in a work done on the cart by pulling it to height. Where the energy equivalent to the work done is stored in the form its potential energy. The potential energy
p = mgh
Some fraction of work done is stored as this energy while the remaining probably lost into the surroundings.
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I will give the brainiest for the one who answers it first and CORRECTLY! (pls don't just randomly put any answer just to get points!) Select the correct answers. Which TWO statements are true about generators?
. They covert motion energy to electric energy
. They have a pair of magnets and a rotating metal coil
. They're powered by fossil fuels
.They convert electric energy to motion energy
.They use the relative motion of magnet and coil of wire
Answer:The true statements about generators would be :
They convert motion energy to electric energy
They use the relative motion of a magnet and a coil of wire.
Explanation:
Generators use the energy of the rotating coil in relative motion with magnets to induce a current within the wire. Generators are devices that convert energy into a voltage by the relative motion of the magnet and a coil that changes flux.