What combines to form bonds in compounds?A.atoms of elementsB.moleculesC.types of mineralsD.valences
write one example of a physical change and one example chemical change
Some make-up removal products suggest shaking the solution before using it. Why would the manufacturers provide this suggestion?
A. The solution evaporates easily.
B. The solution separates naturally.
C. The solutes in the solution separate according to size.
D. The solutes in the solution separate due to magnetism.
a stone is thrown into a well and the splash is heard after 3s. (speed of sound : 340m/s) . 1.) What time did the stone take to reach the water? 2.) how long did it take for the sound to reach the observer? 3.) What is the depth of the well ?
P.s this question was super difficult for me even my physics teacher couldnt do it ( I know it's a shame) but I'm giving 50 points , so geeks start solving.
Answer:
1 - 340/3:
113.3333333 seconds.
A person leaves a starting point at a constant speed of 4 mi./s and walks for four seconds the person then stops for two seconds the person then continues walking at a constant speed of 2 mi./s for four seconds
t or f an objects weight is the amount of space it occupies
Sally is trying to lift a heavy box, but is not strong enough to lift it. Would the force that she is applying to the box be an example of an unbalanced force or a balanced force? Why?
An object with a mass of 5.0 kg is accelerating toward the surface of Earth at a rate of 9.8 m/s^2
Which change would double the gravitational force acting between the object and Earth?
A. doubling the mass of the object
B. doubling the height above the surface
C. bringing the object to a complete stop
D. reducing the rate of acceleration to 4.9 m/s^2
Final answer:
(A) Doubling the mass of an object would double the gravitational force between it and Earth because the gravitational force is directly proportional to the product of the masses involved.
Explanation:
To answer the question: An object with a mass of 5.0 kg is accelerating toward the surface of Earth at a rate of 9.8 m/s², the change that would double the gravitational force acting between the object and Earth is doubling the mass of the object.
Newton's Universal Law of Gravitation states that the gravitational force between two masses is inversely proportional to the square of the distance between their centers and directly proportional to the product of the two masses. So, by doubling the mass of the object, you would directly double the gravitational force, as per the equation F = G * (m₁*m₂) / r², where r is the distance, m₁ and m₂ are the masses, and G is the gravitational constant.
Options B, C, and D do not result in doubling the gravitational force. Doubling the height above the surface would decrease the force, as gravitational force is inversely proportional to the square of the distance. Bringing the object to a complete stop has no effect on the gravitational force.
Reducing the acceleration rate to 4.9 m/s² would suggest that some other force is acting on the object, as the acceleration due to gravity is roughly 9.8 m/s² near the surface of Earth.
Suppose that Earth’s axis were tilted 90 degrees instead of 23.5 degrees. What might the seasons be like?
A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reaches the bottom of the hill? (Assume g = 9.81 m/s2.)
A. 0.466 J
B. 0.308 J
C. 4.317 J
D. 0.0475 J
The kinetic energy of the car when it reaches the bottom of the hill is about A. 0.466 J
[tex]\texttt{ }[/tex]
Further explanationLet's recall Kinetic Energy Formula as follows:
[tex]\large {\boxed{Ek = \frac{1}{2}mv^2} }[/tex]
Ek = Kinetic Energy ( Joule )
m = mass of the object ( kg )
v = speed of the object ( m/s )
Let us now tackle the problem !
[tex]\texttt{ }[/tex]
Given:
mass of the car = m = 0.05 kg
initial speed of toy car = u = 0 m/s
initial height position of the car = h₁ = 0.95 m
final height position of the car = h₂ = 0 m
gravitational acceleration = g = 9.81 m/s²
Asked:
final kinetic energy of the car = Ek₂ = ?
Solution:
We will use Conservation of Energy to solve this problem:
[tex]Ep_1 + Ek_1 = Ep_2 + Ek_2[/tex]
[tex]mgh_1 + \frac{1}{2} m u^2 = mgh_2 + Ek_2[/tex]
[tex]mgh_1 + \frac{1}{2} m (0)^2 = mg(0) + Ek_2[/tex]
[tex]mgh_1 = Ek_2[/tex]
[tex]Ek_2 = 0.05 \times 9.81 \times 0.95[/tex]
[tex]Ek_2 \approx 0.466 \texttt{ J}[/tex]
[tex]\texttt{ }[/tex]
Learn moreImpacts of Gravity : https://brainly.com/question/5330244Effect of Earth’s Gravity on Objects : https://brainly.com/question/8844454The Acceleration Due To Gravity : https://brainly.com/question/4189441Newton's Law of Motion: https://brainly.com/question/10431582Example of Newton's Law: https://brainly.com/question/498822[tex]\texttt{ }[/tex]
Answer detailsGrade: High School
Subject: Physics
Chapter: Energy
At one time, it was thought that positive charge was spread throughout the atom. This was the plum-pudding model. Rutherford's experiment to test this theory involved shooting positively charged particles toward the atom. Describe what the results of this experiment would have been if the plum-pudding model were correct.
Answer:
1) All the alpha particles must have deviated at some angle from their initial path.
2) None of the alpha particle will go out undeviating
Explanation:
In Rutherford's experiment he bombarded alpha particles on the nucleus of gold atom and then he observed that most of the alpha particles moves out undeviating while few of them shows small deflection.
But the most shocking part of experiment was that he saw that one out of 10,000 alpha particles are such which retrace their initial path i.e. those alpha particles are deviated nearly 180 degree angle.
Now these all observations will concluded as
1. Most of the part of atom is vacant and hence atom is not made up of positively charged.
2. Electrons revolves around the nucleus in circular orbits
3. The positive charge of the nucleus is concentrated at the nucleus of of atom which is a very small and dense volume of atom.
So these results are totally opposite of plum pudding model because as per plum pudding model the atom is a positively charged sphere and electrons are randomly placed in it.
If this model is assumed to be correct then in that case the observations must be like following
1) All the alpha particles must have deviated at some angle from their initial path.
2) None of the alpha particle will go out undeviating
What are the smallest building blocks of matter?
Answer:
it would be an atom!!!
Explanation:
A rolling ball moves from x1= 3.4cm to x2= -4.2cm during the time from t1= 2.0s to t2= 6.1s. What is its average velocity?
During adverse weather conditions such as rain or fog, drivers should take action accordingly by turning on their headlights, slowing down and increasing
In adverse weather conditions, drivers should turn on headlights, slow down, and increase their following distance to enhance road safety.
Explanation:During adverse weather conditions such as rain or fog, drivers should indeed respond by adapting their behavior to maintain safety. The first action to be taken is to turn on the car's headlights. This helps other vehicles and pedestrians on the road see you. Secondly, one should slow down. Reduced visibility means that hazards may not be perceived until they are closer, and the wet road conditions may increase stopping distance. Finally, the driver should increase the following distance. This gives you more time to react if the car in front stops suddenly. These three actions can greatly enhance road safety in adverse weather conditions.
Learn more about Driving in Adverse Weather here:https://brainly.com/question/31602876
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Once an experiment has been conducted and the results analyzed, what 4 possible responses are there when interpreting the data?
Upon analyzing the results of an experiment, you can support the hypothesis, reject the hypothesis, postulate new queries, or identify errors.
Explanation:Once an experiment has been conducted and the results analyzed, there are four potential responses when interpreting the data:
Supporting the hypothesis: If the data aligns with predictions made before the experiment, you can state that the experiment supports the hypothesis.Rejecting the hypothesis: If the data contradicts the predictions, the initial hypothesis may be rejected.Postulating new queries: Results from one experiment often lead to new questions that can be tested experimentally. For instance, the findings may suggest a new connection or a contradictory fact that needs further exploration.Identifying errors: In some situations, a hypothesis test may result in a Type I error (rejecting a true null hypothesis) or a Type II error (failing to reject a false null hypothesis). You might identify these upon analyzing the data and results may need to be revised.Learn more about Interpreting Experimental Data here:https://brainly.com/question/13499211
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Please help with the question I really need help
A copper water tank of mass 20kg contains 150 kg
When you speak, your voice is produced by your vibrating vocal chords. These vibrations produce the ________ which carry _________ through the air
Earth is approximately a sphere with a radius of 6.37 x 106 m. What are i) its circumference in km ii) its surface in km² iii) its volume in km³
Computational psychiatry may be used to predict
Answer and Explanation:
Computational Psychiatry tends to aim at describing the relationship in between brain neurobiology, its surrounding and the mental symptoms in the computational terminology. It is known to improve the psychiatric classification and thus diagnostics and the treatment of any mental illness that further persists. It is also known to unite several stages of a description in the most rigorous and mechanistic fashion possible, while also avoiding the biological reduction-ism and the artificial categorization.
Mass is constant, but weight can change with location . Explain.
What does Hadero mean when she uses the term, “sonic lineages”. What does she describe as her own sonic lineages?
A teacher listed the following two processes. • Process 1: water changing to ice in a freezer • Process 2: steam coming out of a kettle filled with hot of water Which table correctly identifies the change of state taking place in each example?
Answer:
d is the correct answer.
Explanation:
D) Liquid to solid and liquid to gas.
3 reasons how scientists evaluate models
1. Susie wondered if the height of a hole punched in the side of a quart-size milk carton would affect how far from the container a liquid would spurt when the carton was full of the liquid. She used 4 identical cartons and punched the same size hole in each. The hole was placed at a different height on one side of each of the containers. The height of the holes varied in increments of 5 cm, ranging from 5-20 cm from the base of the carton. She put her finger over the holes and filled the cartons to a height of 25 cm with a liquid. When each carton was filled the proper level, she placed it in the sink and removed her finger. Susie measured how far away from the carton’s base the liquid had squirted when it hit the bottom of the sink.
Hypothesis:
Independent Variable:
Dependent Variable:
Constant (at least one):
Control:
Number of groups:
Number of trials per group:
Answer:
A scientific experiment is performed to test the hypothesis which is the predicted idea about the natural phenomenon based on the previous research.
The experimental design must contain three types of variables: the variable which can be manipulated (independent variable). the variable which is to be tested (dependent variable) and the variable which is kept constant throughout the experiment (constant variable).
The experimental sample is divided into two groups: the experimental group which includes the factor to be studied and the control group which lack the factor to be studied.
In the given question,
1. Hypothesis: liquid spurt when falls form a height.
2. Independent Variable: Height of hole which gets changed
3. Dependent Variable: Range of squirt which is to be tested
4. Constant (at least one):the volume of filled liquid is kept constant
5. Control: 4 identical cartons which are punched with a hole of the same size.
6. A number of groups: two (control and experimental)
7. Number of trials per group: four
How do constructive and destructive forces change earth
Water has a density of 1.0 g/cm3. Glycerin, a liquid used in some soaps, has a density of 1.26 g/cm3. If an object sinks in water but floats at a constant depth in glycerin, its density is _____.
1.) exactly 1.26 g/cm3
2.) greater than 1.26 cm3
3.) between 1.0 g/cm3 and 1.26 cm3
4.) less than 1.0 g/cm3
The object's density must be greater than water's density (1.0 g/cm3) because it sinks in water and less than glycerin's density (1.26 g/cm3) because it floats in glycerin, indicating it's between 1.0 g/cm3 and 1.26 g/cm3.
Explanation:When determining whether an object will float or sink in a fluid, it's important to compare the density of the object with the density of the fluid. According to the question, the object sinks in water which has a density of 1.0 g/cm3 but floats in glycerin which has a density of 1.26 g/cm3. Therefore, the object's density must be more than that of water but less than that of glycerin. This means the object's density is between 1.0 g/cm3 and 1.26 g/cm3.
A scientific law seeks to explain why an event occurred. True or false
Measurement of angle EGB
When the two plates move away from eachother what's faults are created