Answer: A.
The space contains a magnetic field
Explanation:
A charged particle is surrounded by electric field and exerts force on other charges in the field, attracting or repelling them.
But a charged particles in a magnetic field can escape into infinity without ever stopping due to magnetic force. We can therefore conclude that the space contains a magnetic field
Answer:
Explanation:
B
A wave that is traveling toward an interface is called the...??
Answer:
Surface wave
Eg ocean wave
In unsaturated fats, the fatty acid chain is missing some atoms of _____.
hydrogen atoms.
Explanation:
This is because unsaturated fatty acids have at least two double-bonded carbon atoms, so they cannot bond with the maximum number of hydrogen atoms.
Answer:
hydrogen atom
Explanation:
they have at least two double bonded carbon atoms,so they they can't bond with the maximum number of hydrogen atom
Which of the following statements concerning the scientific method is true?
Once a scientific law is formed, it cannot be changed.
Scientists must first draw a conclusion about a hypothesis and then find
experiments that always support the conclusion,
Scientists first develop a theory, which becomes à hypothesis if other scientists
want the idea to be tested.
Scientists form a hypothesis before conducting experiments and then the
experiments are used to draw a conclusion.
Answer:
Scientists form a hypothesis before conducting experiments and then the experiments are used to draw a conclusion.
Explanation:
FALSE: Once a scientific law is formed, it cannot be changed.
We are always willing to change if we find out we are wrong.FALSE: Scientists must first draw a conclusion about a hypothesis and then find experiments that always support the conclusion,
We must first test our hypothesis through experimentation and base our conclusion on the actual observation.FALSE: Scientists first develop a theory, which becomes à hypothesis if other scientists want the idea to be tested.
A theory starts as a hypothesis that is tested numerous times and found to be consistently true.TRUE: Scientists form a hypothesis before conducting experiments and then the experiments are used to draw a conclusion.
True.A ball has m=10 kg and v=10 m/s. It has the same momentum as which of the following?
Select one:
a. A ball with m = 100 kg and v = 1 m/s.
b. A ball with m = 5 kg and v = 20 m/s.
c. A ball with m = 2 kg and v = 50 m/s
d. all of these
Answer:
Choice d. All three balls listed in choice a, b, and c have a momentum of [tex]100\; \rm kg \cdot m \cdot s^{-1}[/tex] each, same as that of the [tex]10\; \rm kg[/tex] ball moving at [tex]10\; \rm m \cdot s^{-1}[/tex]. Assumption: all four balls are moving in the same direction.
Explanation:
The momentum [tex]p[/tex] of an object is equal to the product of its mass [tex]m[/tex] and its velocity [tex]v[/tex].
Momentum of a [tex]10\; \rm kg[/tex] ball moving at [tex]10\; \rm m \cdot s^{-1}[/tex]:
[tex]p = m \cdot v = 10\; \rm kg \times 10\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m \cdot s^{-1}[/tex].
Similarly:
Momentum of the ball in choice a: [tex]100 \; \rm kg \times 1\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].Momentum of the ball in choice b: [tex]5 \; \rm kg \times 20\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].Momentum of the ball in choice c: [tex]2 \; \rm kg \times 50\; \rm m \cdot s^{-1} = 100\; \rm kg \cdot m\cdot s^{-1}[/tex].Hence the conclusion that these balls have the same momentum.
When a current flows through a light bulb, it emits 30 J light energy in 2 seconds, What is the power of the bulb?
The power of the light bulb is 15 watts.
What is power ?Power in physics is defined as the rate of energy per unit time or in other words the work done by any electrical appliance per unit time. Power is expressed as -
P = E/T where E is Energy and T is the time period.
How to calculate the value of power in the question ?Given that the light bulb emits 30 J light energy in 2 seconds.
We have E = 30J and T = 2 seconds.
Therefore power(P) = Energy(E) / Time(T)
∴ P = 30 / 2 = 15 watts
Thus the power of the light bulb is 15 watts.
To learn more about power in physics, refer -
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An airplane moves in straight level flight at constant velocity. What is the
net force acting on it if the mass of the plane is 1000 kg and the frictional
drag of the air is 1800 N? *
Answer:
Net force = 0
Explanation:
We have, an airplane moves in straight level flight at constant velocity.
Mass of the plane is 1000 kg
The frictional force acting of the air is 1800 N.
It is required to find the net force acting on it. We know that net force is given by the product of mass and acceleration. But here the airplane moves with constant speed, it means its acceleration is equal to 0 such that net force is equal to 0.
A loop with a break in it that prevents current from flowing is called a(n)_______
circuit.
Answer:
an open circuit
Explanation:
what is earths magnetism
Answer:
Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. ... On Earth, magma forms by partial melting of silicate rocks either in the mantle, continental or oceanic crust.
Explanation:
A book with a mass of 1.2 kg sits on a bookshelf. If it has gravitational potential energy of 50 j, how high is the shelf ? The acceleration of gravity is 9.8 m/s 2
Answer:
B
Explanation:
The shelf will be b) 4.3 m high
What is Gravitational potential energy ?
Gravitational potential energy is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field.
given
mass = 1.2 kg
gravitation potential energy = 50J
h = ?
acceleration of gravity is 9.8 m/s 2
gravitation potential energy = m*g*h
50 J = 1.2 kg * 9.8 m/s^2 * h
h= 4.251 m
h ≈ 4.3 m
The shelf will be b) 4.3 m high
learn more about gravitation potential energy :
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Protons have electrical charge; electrons have. electrical charge
Answer:
true
Explanation:
they both have an electrical charge
protons have a positive charge while electrons have a negative charge but both still have an electrical charge
Anthony is standing on the top of a building 10 m high holding a 7 kg bowling ball. Mildred dug a 2-m-deep hole next to the base of the building. What is the gravitational potential energy of the bowling ball relative to the bottom of the hole? P.E = mgh
A. 137.2 J
B. 548.8 J
C. 686.0 J
D. 823.2 J
Answer:
B
Explanation:
Aray diagram is shown.
What does the letter red line represent?
Answer:
Red line is reflected ray.
Explanation:
According to the given figure, the blue line represent the incident ray. It strikes the surface and reflection occurs. The dotted line shows normal.
After reflecting the surface, the ray of light is reflected. Red line shows the reflected light.
In this case, the laws of reflection follows i.e. the angle of incidence is equal to the angle of reflection.
Which of the following is NOT an important factor in selecting a medical professional?
A
cost
B accessibility
C. location
D
appearance
Please select the best answer from the choices provided
А
В
C
D
Answer:
D
Explanation:
appearance is not a imp factor . location could be imp. becoz a proper environment is need to study such courses.
Answer: D. appearance
Explanation:
Which part of the human eye helps to focus light?
retina
pupil
iris
cornea
Answer:
lens my guess is iris
Explanation:
The Lens. The lens is composed of transparent, flexible tissue and is located directly behind the iris and the pupil. It is the second part of your eye, after the cornea, that helps to focus light and images on your retina.
The lens does most of the focusing.
The cornea helps too.
Please help due in a few hours! 90 points!
A 600 N block is life’s by the friction-free pulley system shown.
What is the tension in the end held by the man? If the man exerts 60 J of work what will the increase of potential energy of the 600 N weight?
Answer:
+540n
Explanation:
Traveling in circle requires a net force
Answer:
Circular motion requires a net inward or "centripetal" force. Without a net centripetal force, an object cannot travel in circular motion. In fact, if the forces are balanced, then an object in motion continues in motion in a straight line at constant speed.
Explanation:
How much current must be applied across a 60 Ω light bulb filament in order for it to consume 55 W of power? Unserious answers will be deleted, and reported. (Please show some work)
Answer: current I = 0.96 Ampere
Explanation:
Given that the
Resistance R = 60 Ω
Power = 55 W
Power is the product of current and voltage. That is
P = IV ...... (1)
But voltage V = IR. From ohms law.
Substitutes V in equation (1) power is now
P = I^2R
Substitute the above parameters into the formula to get current I
55 = 60 × I^2
Make I^2 the subject of formula
I^2 = 55/60
I^2 = 0.92
I = sqr(0.92)
I = 0.957 A
Therefore, 0.96 A current must be applied.
Pretend you are explaining to a friend an object's energy can change depending on the position of the object. Use details from the text to help you write your conversation below.
The text is the picture
I WILL MARK YOU AS BRAINLIEST
Answer:
sorry, need better iinformation
Explanation:
.
Answer:
i am confused
Explanation:
A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?
Answer:
The acceleration of the bag of sand is [tex]1\ m/s^2[/tex].
Explanation:
We have,
Mass of a bag of sand is 100 kg
Weight of the bag of sand is 100 N
It is required to find the acceleration of the bag when it is dropped. The weight of an object is given by :
[tex]F =ma[/tex]
When it is dropped, a = g
[tex]g=\dfrac{F}{m}\\\\g=\dfrac{100}{100}\\\\g=1\ m/s^2[/tex]
So, the acceleration of the bag of sand is [tex]1\ m/s^2[/tex].
What does the law of conservation of energy state about energy in a closed system
Answer:
The total energy in a closed system (a system that isolated from its surroundings) is always constant.
Explanation:
The law of conservation energy states that:
The total energy in a closed system (a system that isolated from its surroundings) is always constant.
What this law means is that energy can never be created or destroyed but can only be converted from one form to another form or example the conversion of energy from potential energy to kinetic energy which is seen by a falling object from a height.
Which phrase correctly describes ice?
A) Rigid and having low viscosity
B) Crystalline and having high surface tension
C) Amorphous and having low viscosity
D) Crystalline and rigid
Answer: D) Crystalline and rigid
Explanation:
Ice is considered to be a rigid mineral. It possesses a regular crystalline structure based on the molecule of water, which consists of a single oxygen atom covalently bonded to two hydrogen atoms, or H–O–H.
Answer: D
Explanation:
Identify the magnetic north pole of Earth’s magnet?
Answer:
using magnets
Explanation:
If we hang a magnet with a rope to an object the north pole of the magnet will point to the Earth's north pole
Describe the relationship between the direction of the velocity vector and the direction of the acceleration for a body moving in a circle at constant speed.
Hi, I need some science help ASAP. Here's the question:
Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?
5 kg
20 kg
25 kg
100 kg
Answer:
Mass of the box is 25kg
Explanation:
From Newton's second law of motion
Force= mass. acceleration
With the symbol
F=m.a
m=F/a m=(50N)/(2m/s²)
m=25kg
Answer:
25k
Explanation:
Determining Charge
An element becomes a positively charged ion when it
oloses protons.
loses electrons.
gains electrons
gains neutrons.
Answer:
hey friend,
an element becomes a positively charged ion when it loses electrons
When a ball is tossed upward, along the way
A. the amount of kinetic energy and the amount of potential energy change
B. all of its energy is lost to friction with the air, and both kinetic and potential energy are zero at the highest point of travel.
C. its potential energy decreases and reaches zero at the highest point of travel D. its total energy increases and is at a maximum at the highest point of travel
Answer:
A
Explanation:
going upward, kinetic energy decrease and potential energy increase
Answer:
A
Explanation:
As a ball is thrown into the sky, potential energy increases and kinetic energy decreases. But, the mechanical energy ( that is the sum of the potential and kinetic energy) remains the same....
In a science experiment showing the splitting of water into Oxygen and hydrogen, two inverted test tubes of water were placed over the site of the reaction. (see the pic) How can you tell which one was catching the oxygen and which one was catching the hydrogen?
The hydrogen is a positive ion and will be located close to the negative terminal of the battery.
The oxygen is a negative ion which will be located next to the negative terminal of the battery.
There are 2 hydrogen atoms for every oxygen atom. The hydrogen will take up more space and is pushing the water lower in the test tube.
The hydrogen, being a smaller atom, will take up less space than the oxygen. It will push the water down less.
Answer:
There are 2 hydrogen atoms for every oxygen atom. The hydrogen will take up more space and is pushing the water lower in the test tube.
Explanation:
Electrolysis refers to the decomposition of a solution (electrolyte) owing to the passage of direct current through the solution.
Water is decomposed into its constituents; hydrogen and oxygen by electrolysis. However, a battery is connected to drive the process and other electrolytes such as dilute acids are added to improve the conductivity of water.
In the electrolysis of water, two moles of hydrogen gas is produced for each mole of oxygen gas produced. Hence the ratio of hydrogen to oxygen gas produced is 2:1 by volume. This implies that the space occupied by oxygen is half the space occupied by hydrogen. The hydrogen will thus occupy more space, pushing the water much lower than oxygen.
Which equation is balanced?
H2+ O2 + H2O + O2
H2+ O2 + H2O
2H2 + O2 + 2H2O
4H2 + O2 + H2O +O
Answer:
2H2+O2➡️2H2O is balanced. I think.
Which of the following is NOT an important component of planning ahead?
A figuring out necessary steps
B. setting plausible limits
C. constructing an inflexible plan
D. deciding what you want to accomplish
Answer: B setting plausible limits
Explanation: because when you are planning ahead you must only think how to do the thing correctly if you do all of your steps correctly you won't have any limitations.
Answer:
The correct answer is constructing an inflexible plan. Planning is a huge part in an individual’s life and also the life of a company. Though we want to plan for everything that could possibly happen, there needs to be flexibility as situations can change. Due to the fact planning can have a positive affect on a business for future happenings, it must also have variable and flexible room incase there are changes that need to be made.
Explanation:
The brakes on a bicycle apply 95 N of force to the wheels. When the
brakes are applied, the bicycle comes to a stop in 16 m. How much work
are the brakes doing on the wheels?
0 1,500
O 250 m
1,520 J
40 m/s
Answer:
Work done, W =1520 J
Explanation:
We have,
The brakes on a bicycle apply 95 N of force to the wheels. When the brakes are applied, the bicycle comes to a stop in 16 m.
It is required to find the work done by the brakes on the wheels. We know that the product of force and displacement is equal to the work done. It is given by :
[tex]W=Fd\\\\W=95\times 16\\\\W=1520\ J[/tex]
So, the work done by the brakes is 1520 J.
