Answer:
0.6m/s²
Explanation:
Given parameters:
Initial velocity = 3m/s
Final velocity = 4.5m/s
Time taken = 2.4s
Unknown:
Average acceleration = ?
Solution:
To solve this problem, we use the expression:
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Acceleration = [tex]\frac{4.5 - 3}{2.5}[/tex] = 0.6m/s²
Which will have a larger momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan
Answer:
2000 kg
Explanation:
Given that Which will have a larger momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan
According to the definition of momentum, momentum is the product of mass and velocity.
That is,
Momentum = mass × velocity
Since velocity or speed is the same, then, the one of higher mass will have a greater momentum.
Therefore, the 2000 kg truck will have the greater momentum.
A truck will have a larger momentum as compared to sedan because the weight of truck is higher than sedan.
What is momentum?Momentum is defined as the product of the mass of a particle and its velocity.
Momentum is directly proportional to mass and velocity which means if mass increases the momentum of that body is also increases so we can conclude that truck has higher momentum.
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Question 5
2 pts
(04.03 MC)
Which types of changes must follow the law of conservation of mass? (2 points)
O Both physical and chemical changes
Neither physical nor chemical changes
O Only physical changes
O Only chemical changes
Answer:
A Both physical and chemical changes.
Explanation:
Priscilla was building a circuit that used copper wires to connect a battery to a light bulb. As she connected the final wire from the light bulb back to the battery, the light bulb turned on. Priscilla knew that current was now flowing through her closed circuit. What makes the current in the circuit flow?
Answer:
Voltage or electromotive force
Explanation:
The voltage or electromotive force in an electrical circuit causes current to flow from a point of higher electrical potential to that of a lower electrical potential in the electric circuit. So, when Priscilla closes the circuit, the electromotive force makes current to flow in the circuit and thus turn on the bulb.
A woman stands on the edge of a cliff and throws a stone vertically downward with an initial speed of 10 m/s. The instant before the stone hits the ground below, it has 450 J of kinetic energy. If she were to throw the stone horizontally outward from the cliff with the same initial speed of 10 m/s, how much kinetic energy would it have just before it hits the ground
Answer:
It will have the same KE ( 450 J ) just before it hits the ground. The GPE transferred to KE is the same in both cases and the original KE is the same in both cases so the total will be the same.
The one thrown sideways will take longer to get to the ground but it will have the same velocity ( and therefore KE ) as the thrown down stone.
Explanation:
Somebody please help
Answer:
a = 0.1067 [m/s²]
Explanation:
In order to solve this problem, we must first draw a free body diagram with the forces acting on it.
a)
In the attached image we can find the free body diagram.
b)
The net force can be found by performing a sum of forces on the X-axis, these forces are seen in the free body diagram.
∑Fx = Fr
where:
Fr = resultant force [N] (units of Newtons)
[tex]F_{r}=275+275-310\\F_{r}=240[N][/tex]
c)
Acceleration can be found by means of Newton's second law, which tells us that the sum of the forces in a body or the resulting force is equal to the product of mass by acceleration.
∑F = m*a
where:
m = mass = 2250 [kg]
a = acceleration [m/s²]
[tex]240=2250*a\\a=0.1067[m/s^{2} ][/tex]
Which statement is true about the process shown?
Answer:
The answer is A, I just took the quiz :)
ik you already got the answer, but just in case anyone else who gets this question looks here, the person who said A was right!!
The total mass of the product nuclei is greater than the mass of the target nucleus
What is product nuclei ?"Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of uranium fissions by splitting into two smaller nuclei, along with a few neutrons, the release of heat energy (kinetic energy of the nuclei), and gamma rays."
What is nuclear reaction ?"Change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle. The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion."
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What is the difference between a mechanical wave and an electromagnetic wave?
A mechanical wave travels through empty space, while an electromagnetic wave travels through matter.
A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.
A mechanical wave has a high frequency, while all electromagnetic waves have low frequencies.
A mechanical wave travels through matter, while an electromagnetic wave travels through empty space.
its regular chooiseing just decide one and tell me
Answer: A a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.
Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.
Complete the statement below with all that apply.
Acceleration is
The answer is B- the slope of a velocity vs. time graph.
what is the power of television that transfers 6750J of energy every 45 seconds.
forces can be________. What phrase completes the sentence.
1.Pushes only
2.Pushes or pulls
3.Pulls only
Answer:
pushes or pulls
Explanation:
hope this helps....
Help with 7 - 9 please!
Answer:
Try lookin those questions up on Brainly
Explanation:
A block of wood weighing 30N and of specific gravity 0.75 is ties by a string to the bottom of a tank of water in order to have the block totally immersed.What is the tension of the string?
A particle moving at a velocity of 4.7 m/s
in the positive r direction is given an accel-
eration of 5.4 m/s in the positive y direction
for 0.1 s.
What is the final speed of the particle?
Answer:
5.24m/s
Explanation:
Given parameters:
Initial velocity = 4.7m/s
Acceleration = 5.4m/s²
Time = 0.1s
Unknown:
Final velocity of the particle = ?
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Now find v;
5.4 = [tex]\frac{v - 4.7}{0.1}[/tex]
0.54 = v - 4.7
v = 5.24m/s
Which of the following is not the result of nuclear decay.
An unstable atomic nucleus emits energy
An unstable atomic nucleus discharged particles
An unstable atom changes its identity
A stable atom change its identity
Answer:it’s c
Explanation:
Answer:
an unstable atomic nucleus emits energy
Explanation:
just toke quiz
How many groups are in the modern periodic table?
12
18
22
24
Answer:
18
Explanation:
EDGE2021
A spring with a spring constant of 2.5 N/m is stretched by 2
m. What is the potential energy in the spring?
Answer:
Eelas = 5 [J]
Explanation:
Elastic energy is associated with the ability that has a spring or any other material with elastic properties.
We can calculate the elastic energy by means of the following equation:
[tex]E_{elas}=\frac{1}{2} *k*x^{2}[/tex]
where:
k = constant spring = 2.5 [N/m]
x = distance stretched = 2 [m]
[tex]E_{elas}=\frac{1}{2} *2.5*(2)^{2}\\E_{elas}=5[J][/tex]
A wooden block has a mass of 12 kg and is experiencing a force of 6 N. Calculate the acceleration that the wooden block will experience. Give your answer to ONE DECIMAL PLACE.
what kind of charge does a pencil sitting on a table have
Answer
Potential energy
Explanation:
When the pencil is sitting on the desk, it has maximum potential energy and minimum kinetic energy. As it falls, its velocity increases, which increases the kinetic energy
What is the net force acting on this cart ?
Explanation:
There is a force of 3N acting towards the left and 2 forces of 4N each acting towards the right.
Net force = (4N) + (4N) - (3N) = 5N towards the right.
P.S. We subtract the 3N force because the forces are in opposite directions.
Use the drop-down menus to identify the variables for the first hypothesis.
Hypothesis #1:
As you build circuits, you will alter voltage, which is the
variable. You will measure how changing the
resistance affects the current, which is the
variable. A "constant" is a parameter that stays the same
regardless of the other variables, and in this case,
is held constant.
Answer:
ind, dep, resistance
Explanation:
In a circuit, the voltage is an independent variable and current is a dependent variable, while the resistance is a constant parameter.
What is Ohm's law ?Ohm's law states that, the amount of current flowing through an electrical circuit is directly proportional to the voltage applied across the circuit.
Here,
According to Ohm's law,
Voltage [tex]\alpha[/tex] Current
V [tex]\alpha[/tex] I
V = a constant x I
V = IR
where, R is the resistance of the circuit.
Therefore, we can say that the resistance in the circuit is a constant parameter.
So, the voltage and current are the variable parameters, while the resistance remains the same.
Also voltage is an independent variable and current is a dependent variable.
Hence,
In a circuit, the voltage is an independent variable and current is a dependent variable, while the resistance is a constant parameter.
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A stone of weight 1 N falls downwards. Its g.p.e.
decreases by 100 J. How far has it fallen?
Answer:
h = 100 m
Explanation:
Given that,
The weight of a stone, W = 1 N
It falls downwards. Its gravitational potential energy decreases by 100 J.
We need to find how far it is fallen.
The gravitational potential energy of an object is given by :
E = mgh
h is from where it has fallen
[tex]h=\dfrac{E}{mg}\\\\h=\dfrac{100}{1}\\\\h=100\ m[/tex]
So, it has fallen 100 m.
Is steam gas? If not what is?
Answer:
steam is a gas
Explanation:
Answer: Steam is an invisible gas, unlike water vapor, which appears as a mist or fog.
Explanation:
What is the difference between a waves, amplitude, frequency and wavelength?
Answer: The amplitude or height of a wave is measured from the peak to the trough
Explanation: The wavelength is measured from peak to peak. Otherwise wavelength is directly related to the frequency of a given wave form
Help!
An alert driver must be able to react to the unexpected actions.
A. of other drivers.
B. caused by their drug use.
C. observed while impaired.
An alert driver must be able to react of the unexpected actions of other drivers. Hence, option A is correct.
What is Traffic?Traffic is made up of people using public ways (roadways) for movement, such as walkers, cars, trains, and animals being ridden or herded.
The road rules include traffic rules and unwritten guidelines that may have evolved through time to help ensure the timely and orderly flow of traffic. Traffic laws control and regulate traffic. In general, organized traffic has lanes, right-of-ways, priorities, and intersection traffic control.
In many jurisdictions, traffic is formally structured with designated lanes, junctions, intersections, junctions, traffic signals, or signage.
The three main categories of traffic are heavy motor vehicles, other vehicles, and pedestrians. Speed restrictions and easements may be shared by different classes, or they may be segregated.
Therefore, an alert driver must be able to react as per the other drivers, so it can prevent any mishappening.
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Which is the best set of tools to use for separating a mixture of water, sugar, and
pebbles?
A. a filter and a magnet
B. a filter and a hot plate
c. a magnet and a hot plate
D. a settling tank and a filter
The one that is best set to use for separating a mixture of water, sugar, and pebbles is a filter and a hot plate. The correct option is B.
What is a mixture?A mixture is made up of one or more pure substances that have varying compositions.
Mixtures are classified into two types: heterogeneous and homogeneous. Heterogeneous mixtures have distinct components, whereas homogeneous mixtures appear uniform throughout.
During distillation, the sugar solution is heated, causing water to evaporate and leaving the sugar behind.
After that, the water vapor is passed through an inclined tube. It cools due to the cold water around it and condenses to form water in a separate container.
Filters can generally separate mixtures of solids in liquids, solids in gases, and solids in solids. Filtration is the separation of unwanted particles from desired particles.
Thus, the correct option is B.
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In the chemical equation above, the small number after the O in 1202 represent —
Answer:
G.) The number atoms of that element in the molecule
Explanation:
F is incorrect because the coefficient represents the amount of one type of molecule, not the subscript
G is correct because subscripts represent how many atoms of that element are present in that single molecule
H is incorrect because energy is not represented in this simple type of equation
J is incorrect because it doesn't even make sense
A student investigated how length affects resistance of a wire.
Figure 1 shows the circuit the student used.
The student took measurements using the meters X and Y.
Name meters X and Y.
Answer:
X is ammeter and Y is voltmeter
Explanation:
The resistance of a wire is directly proportional to the length of the wire. That is the longer the length of the wire, the higher the resistance and the shorter the length of the wire, the smaller the resistance.
Ammeter is a measuring instrument used to measure the current in a circuit by connecting the meter in series with the circuit.
Ammeter is a measuring instrument used to measure the potential difference between two points by connecting the meter in parallel to the points.
Meter X is an ammeter since it is connected in series and meter Y is a voltmeter because it is connected in parallel.
Solar energy and hydroelectric energy are important sources of energy. Find out more about either one of these forms of energy. What is being done to make it a more efficient source of energy, and where it is being used in the United States?
Answer:
Question: Find out more about either one of these forms of energy
Answer:
Solar energy: This is energy generated from the sunlight, and it can be converted to other energy that can be useful. Solar energy from the sun considered a clean source of electricity can be converted to a usable electricity source or stores the light in batteries for thermal use. This energy conversion is possible through the use of solar panels attached to where the conversion would take place so as to capture the light from the sun.
Question: What is being done to make it a more efficient source of energy
Answer:
1. When using solar energy to power homes, it is more efficient to have panels on a green roof because of the characteristics of this roof not to reflect or lose more light from the sun.
2. Improvements on the type of solar cell to use for instance that are cheaper and could maximize the energy from the sun are all ways that make it more efficient.
3. Since solar panels don't produce energy at night, usage of batteries that could store electricity during the day or when the sun is not obscured would make solar more efficient.
Question: where it is being used in the United States?
Answer:
1. California
2. Nevada
3. New York
4. Texas
A race car accelerates from 16.5 m/s to 45.1 m/s in 2.27 seconds. Determine the acceleration of the car.
O 12. 60 m/s2
O 5.9 m/s2
8.8 m/s2
O 10.8 m/s2
Answer:
12.6
Explanation:
Very Important!!
If a person rapidly drinks a large amount of alcohol, it could lead to what is known as.
A. an alcohol-induced blackout.
B. an alcohol-inspired coma.
C. an alcohol-induced fainting spell.
Answer:
B) an alcohol-inspired coma
There are three types of alcohol one is primary second is secondary and third is tertiary. Therefore, the correct option is option B that is an alcohol-inspired coma.
What is alcohol?Alcohol is a chemical molecule with a functional group called hydroxyl linked to a saturated carbon atom. Alcohols classified as primary have just one alkyl group on which the carbon atom of the hydroxyl group (OH) is connected.
Secondary alcohols are those that have two alkyl groups on either side of the carbon atom of the hydroxyl group. In tertiary alcoholic group, the carbon that is bonded to hydroxyl group is bonded to three alkyl groups. If a person rapidly drinks a large amount of alcohol, it could lead to what is known as an alcohol-inspired coma.
Therefore, the correct option is option B.
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