Answer:
A: Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that’s above the ball. Slip an end of the string through the hole, and tie a knot. This is your pendulum. Hold the loose end of the string still with one hand. With the other hand, raise the ball in an arc so that it’s almost level with the hand holding the string. With the string taut, let the ball go. What do you observe?
Mine was swaying perfectly fine. after a little bit it gradually started swinging slower until stopped.
B: Why did the pendulum stop swinging? Where did the energy go?
gravity was pulling it towards the ground, however the weight and momentum of the ball helped it keep swinging for a good while.
C: Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic [THE ENERGY OF MOTION IN A BODY] energy is the energy of motion, and potential energy [THE STORED ENERGY IN AN OBJECT] is stored energy. At the top of its swing, does the pendulum have kinetic or potential energy?
when its at the very top of the swing it does have a very small amount of time until it starts going back down again but during that time it is potential energy
D: At the bottom of its swing, does the pendulum have kinetic or potential energy?
the pendulum still has kinetic energy when it is the closest to the ground since it is still swinging
E: Think about the process of raising the pendulum to one side and letting it go. For this event, create a list of each form of energy associated with the pendulum as it cycles.
when its in my hand: potential energy
when it starts swinging: kinetic energy
when its going upwards: kinetic energy
when it stops swinging: potential energy
F: How could you give the pendulum more energy?
one way you could possibly make it have more energy is if you make the string longer
G: Now raise the pendulum and let it hit a metal lid or pan. When the ball strikes the lid, what forms of energy can you identify?
I could hear sound energy when the two made contact but for the most part it was kinetic energy
Answer:
I could hear sound energy when the two made contact but for the most part it was kinetic energy
Explanation:
Here is a picture showing how two magnets will stick to one another when opposite poles align. When these magnets are pulled
slightly apart, does the attractive force between them still exist?
A)
Yes, but the new attractive force is due to gravity.
B)
No, since they are not touching, no force is at work.
Yes, even though they are not touching, they are pulling on one another.
D)
No, when the magnets are apart, they exert a repulsive force on one
another
Answer:
A
Explanation:
The others are only when the poles are the same as in south pole and south pole however north pole and south pole do connect cause they are oppisites
The input work on a pulleysystem is75 j. The pulley system is 84% efficient, then what is the output work from the pulley
Answer:
63 J
Explanation:
Efficiency = work out / work in
0.84 = W / 75 J
W = 63 J
What is the momentum of a vehicle that has a mass of 800 kg and is moving at a velocity of 5 m/s
Answer:
4000 kg.m/s
Explanation:
p=mv
m=800 kg
v=5 m/s
p=(800)(5)= 4000 kg.m/s
Corey exerts a force of 35 N and moves a crate 3 m. How much work has he done on the crate?
15 J
105 J
(True/False) According to Newton’s third law of motion, it is true that an object moving at a constant speed in a straight path will continue to do so until a net force acts upon it.
The statement itself is true. But to be completely and compulsively correct, that's Newton's FIRST law of motion, not the third.
SOMEONE HELP ME!!!!!!!
calculate the kinetic energy of car of mass 150kg moving with velocity of 30km/h. what will be the kinetic energy when it's velocity is doubled and then tripled?
Answer:
The correct answer is -
1. 67500 J
Explanation:
The formula for KE is
K. E. = 1/ 2 *m v ^2
So input the values we know:
K . E. = 1/2 ⋅*150 *30 ^2
K . E. = 150 * 900 /2
K . E . = 67500
K . E. = 67500
If the velocity is double then;
use 2v in the formula
K. E. = ( 1/ 2 )*m(2 v) ^2
= (1/2)*4m v ^2
it is four times to original Kinetic energy, and similarly if tripled then, it will be 9 times to original.
a rocket engine applies a force of 50000 N for a distance of 20 m. how much work is done?
Answer:
1000000Nm
Explanation:
W=force*distance
50000*20
Frank has a mass of 30 kg. He is sitting on a swing which is 2.3 m long. His dad pulls him up to a height of 1.2 m above his lowest point and releases him.
b. What is his velocity at the bottom of his path?
Answer:
His velocity at the bottom of his path is approximately 4.85 m/s
Explanation:
From the question, we have;
The mass of Frank, m = 30 kg
The length of the swing which he is sitting on, l = 2.3 m
The height above the lowest point to which the dad pulls him, h = 1.2 m
Potential energy, P.E. = m·g·h
Where;
g = The acceleration due to gravity ≈ 9.8 m/s²
The maximum potential energy Frank gains, P.E.[tex]_{max}[/tex] is goven as follows;
P.E.[tex]_{max}[/tex] = 30 kg × 9.81 m/s² × 1.2 m = 353.16 J
Therefore, by the principle of conservation of energy, we have;
The maximum kinetic energy at the bottom of the swing, K.E.[tex]_{max}[/tex] = P.E.[tex]_{max}[/tex] = 353.16 J
K.E. = 1/2·m·v²
Where;
v = The velocity at the bottom of his path
∴ K.E. = 1/2 × 30 kg × v² = 353.16 J
v² = 353.16 J/(1/2 × 30 kg)
v² = 23.544 m²/s²
v = √(23.544 m²/s²) ≈ 4.85 m/s
His velocity at the bottom of his path, v ≈ 4.85 m/s
The process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a patron an electron is called wht
Answer:
beta decay.
Explanation:
THIS IS THE COMPLETE QUESTION BELOW;
The process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a proton while releasing an electron is called ______
Beta decay (β-decay) can be regarded as type of radioactive decay whereby
a beta particle whereby fast energetic electron is been emmitted away from atomic nucleus, and the original nuclide is been transformed to isobar of the particular nuclide. The process Beta decay can make unstable atoms to be more stable. The two types of beta decay are;
✓beta-minus
✓beta-plus. It should be noted that the process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a proton while releasing an electron is called beta decay.
CHECK ATTACHMENT FOR EXAMPLE OF BETA DECAY EQUATION
What is the
power of a light
bulb with 8V and
a current of 2A?
Answer:
16 Watts
Explanation:
P = VI, where V is the voltage and I is the current (of the lightbulb)
V = 8 volts, I = 2 amps
P = 8 * 2 = 16 Watts
If a wave has a wavelength of 10 m and a speed of 2.5×108 m/s (this is 250000000 m/s) what is the frequency of the wave?
Answer:
The wavelength result is 3 m. Most common velocities: Light in vacuum (air) = 300,000 km/s. Light in water = 225,000 km/s. Sound in air = 340 m/s. Sound
Explanation:
the answer is 3m
If an owl produces two pellets every 24 hours and each pellet contains the remains of 3 prey, how much does it eat in a week? A month?
The owl eats 42 prey in a week and 180 prey in a month.
To calculate how much the owl eats in a week and a month, we need to determine the number of prey consumed in each time period.
In a week:
The owl produces two pellets every 24 hours. So, in one day, it consumes 2 * 3 = 6 prey (since each pellet contains the remains of 3 prey).
In a week (7 days), the owl consumes 6 * 7 = 42 prey.
In a month:
Assuming a month has 30 days (though some months have 31 days or 28/29 days), we can calculate the number of prey consumed in a month.
In a day: 6 prey
In a month (30 days): 6 * 30 = 180 prey.
Hence, the owl eats 42 prey in a week and 180 prey in a month.
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If a car accelerates from rest at a constant 4 m/s
, how long will it take for the car to reach a
velocity of 28 m/s?
Answer:
The time it will take for the car to reach a velocity of 28 m/s is 7 seconds
Explanation:
The parameters of the car are;
The acceleration of the car, a = 4 m/s²
The final velocity of the car, v = 28 m/s
The initial velocity of the car, u = 0 m/s (The car starts from rest)
The kinematic equation that can be used for finding (the time) how long it will take for the car to reach a velocity of 28 m/s is given as follows;
v = u + a·t
Where;
v = The final velocity of the car, v = 28 m/s
u = The initial velocity of the car = 0 m/s
a = The acceleration of the car = 4 m/s²
t = =The time it will take for the car to reach a velocity of 28 m/s
Therefore, we get;
t = (v - u)/a
t = (28 m/s - 0 m/s)/(4 m/s²) = 7 s
The time it will take for the car to reach a velocity of 28 m/s, t = 7 seconds.
10 minutes on the stove, the water molecules in the pot are in two different
states Identify the two different states of water molecules in the pot. Then, compare the
motion and the energy of these two types of water molecules,
Answer:
20 molcues
Explanation:
10 minutes on the stove, the water molecules in the pot are in two different states , the two different states are the liquid state and the gaseous state.
What is the matter ?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma .
These different states of matter have different characteristics according to which they vary their volume and shape .
As given in the problem 10 minutes on the stove , the water molecules in the pot are in two different states , the two different states are liquid state and the gaseous state ,
The gaseous state of the water molecules has higher energy and then motion as compared to the liquid state of the water molecule .
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State Newton's first law of motion .
Answer:
dis mans newton says if a body is at rest or moving at a constant speed in a straight linne it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force
Answer:
Newtons first law of motion states that"A body will continue to its state of rest or motion unless external force acted upon it.
HELP!!! I MIGHT FAIL THE 6th GRADE IF I DON'T GET HELP!!!! The southern United States experiences periodic occurrences of severe cold and drought conditions. Which weather phenomenon most likely causes this and why?
Answer:
La Niña, because the jet stream is displaced northwards
Explanation:
La Nina is known to be a cool phase that affects the average ocean temperature. During this period the surface wind becomes stronger and there is lesser rainfall over the areas of the central tropical Pacific to which the Southern United States belongs.
Hence, when the southern United States experiences periodic occurrences of severe cold and drought conditions, the weather phenomenon most likely causes this and why is "La Niña, because the jet stream is displaced northwards."
Can sb help me frfr
If an element has 20 protons and 20 neutrons in the nucleus of its atoms , what is the mass number of the atom?
Answer:
A=z+n
A=20+20
A=40
Explanation:
Not sure if I'm correct but I was taught that mass number is calculated by A=z+n where A is the mass number, z is the proton number and n is the number of neutrons.
How many parts of oxygen do you need for
each part of acetylene for a neutral
flame?
explain a conventional method of heat transfer.
Conventional method of heat transfer.
Convection refers to a method of heat transfer where food is heated by a moving heat source such as hot air inside an oven that is circulated by a fan.How it works?
Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. As a result, the particles take up more volume.For example:
Conventional ovens, which do not have fans, rely primarily on radiation from the oven walls, and to a lesser extent, on natural convection caused by temperature differences. The fans in convection ovens allow more heat to be transferred via convective heat transfer.Learn more:
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Please sb help me fr
Answer:
I think it might be box 1. Hope this is right have a good day
me lo traduses plis no se ingles solo escribe lo que dice en la guia
Which of the following is a subatomic particle?
Particle
Atom
Neutron
Element
Answer: particle and neutron
Explanation:
correct me if i’m wrong :)
What has increased the concentration of atmospheric carbon dioxide (CO2)?
Answer:
Carbon dioxide concentrations are rising mostly because of the fossil fuels that people are burning for energy.
what type of wave is created by sound waves
CAN SOMEONE PLEASE TELL ME WHAT THIS WHEEL IS CALLED.WILL GIVE BRAINLIEST
Answer:
its a pie chart
Explanation:
.........................
Answer:
its a pie chart?
Explanation:
.......
If a force is applied to an object, which of the following must be true?
Answer:
D. The force applied will contribute to the total net force.
good luck, i hope this helps :)
Which TWO statements explain how water changes when its temperature decreases from 70 degrees to 28 degrees?
Two magnets are attracting each other. One magnet is big and strong; the other is small and weak. The big magnet attracts the small magnet with:
Answer:
magnetism and dipole-dipole interaction
Explanation:
Two magnets are attracting each other, one magnet is big and strong, the other is small and weak, the big magnet attracts the small magnet with a stronger force, and the attraction depends on the size of the magnet.
What is the significance of the magnet and magnetic fields?The attraction between two magnets varies, and that depends upon several factors such as the strength of the force of attraction, which determines the usefulness and functionality of magnets, for example, in industrial settings, strong magnets are often used to lift heavy loads, etc.
Hence, two magnets are attracting each other, one magnet is big and strong, the other is small and weak, the big magnet attracts the small magnet with a stronger force, and the attraction depends on the size of the magnet.
Learn more about the magnet and magnetic fields here.
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The offspring resulting from sexual reproduction are exactly like their parents.
false
true
Answer:
false
Explanation:
As both parents contribute half of the new organism's genetic material, the offspring will have traits of both parents, but will not be exactly like either parent
Answer:
False
Explanation:
The only time you end up like your parent is asexual reproduction
The figure above shows the position of a moon that orbits a planet in an elliptical path. Two specific locations of
the moon, position and position , are labeled.
1. As the moon orbits the planet from position to position , is the magnitude of the planet’s force due to
gravity exerted on the moon constant? Why or why not?
A
Yes, because the masses of the planet and moon remain constant.
B
Yes, because the elliptical path that the moon travels around the planet is the same for all revolutions.
C
No, because the tangential speed of the moon is always changing.
D
No, because the moon’s distance from the planet is always changing.
It is evident that the force due to gravity exerted on the moon is not constant because the moon’s distance from the planet is always changing.
What is the gravitational force?The gravitational force is the force of attraction that brings two masses together in the universe. We have to note that the gravitational force is an attractive force and that all of the objects that are found on the surface of the earth are under the gravitational filed of the earth.
Now we know that the distance that exists between the the moon as it is orbiting round the sun is always changing. We know that the gravitational force depends on the masses as well as the distance.
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