Answer:
2.25m/s
Explanation:
wavelength=4.5m
period=2sec
frequency= 1/period
=1/2
speed= wavelength×wave frequency
=4.5×1/2
=2.25 m/s
so, none of the options are correct
Answer:
2.3 m/s
Explanation:
I took the test.
What's the main term used to locate in the alphabetic index for acute perforated gastrojejunal ulcer
Answer:
the main term used to locate in the alphabetic index for acute perforated gastrojejunal ulcer is ULCER
Explanation:
because the main is a term identifying disease conditions or injuries
the maximum displacement of a particle, within a wave, above or below its equilibrium position, is called__________
Answer:
the amplitude.
Explanation:
Resistance and resistivity are related by a:
A: factor that is dependent on the length of the material
B: proportionality constant dependent on the source of the material
C: factor that is dependent on the area of the material
D: proportionality constant dependent on the identity of the material
Answer: D
Explanation: Resistance of current in a wire is directly proportional to the length of the wire and inversely proportional to the cross - sectional area of the wire. That is,
R = (rho × L)/A
Where
L = length of the wire
A = cross sectional Area of the wire
rho = resistivity = proportionality constant which depends on the quality of the wire.
Therefore, Resistance and resistivity are related by a:
proportionality constant dependent on the identity of the material.
What happens to the gravitational force between two objects as the distance between them decreases?
Answer:
gravitational force increases
Explanation:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are brought closer to each other, the force of gravitational attraction between them also increases.
This is an example of A) alpha decay B) beta decay C) gamma decay D) half-life decay
Answer:
The answer is option A.
alpha decay
Hope this helps
When is a train on Earth in motion relative to the sun? A It is relative to the sun only when the train is not moving. B It is never in motion relative to the sun. C It is relative to the sun only when the train is moving. D It is always in motion relative to the sun.
Answer:
A. It is relative to the sun only when the train is not moving.
Explanation:
Which method is used to separate parts of a solution when the entire solution can pass through a filter?
Answer:
Straining method
Explanation:
Straining method is the method that can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter.
Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which change shows the best application of Newton’s laws of motion to achieve this goal? increasing the inertia of the car decreasing the reaction force increasing the action force decreasing the mass of the car Mark this and return
Answer:
d. decreasing the mass of the car
Explanation:
Engineers are trying to improve race cars. Their goal is to increase the acceleration of the car using the same engine, it can be achieved by decreasing the mass of the car, therefore the correct answer is option C.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine,
The acceleration of the car can be increased by decreasing the mass of the car assuming the engine of the car is producing the same amount of force.
Thus, the acceleration can be increased by decreasing the mass of the car, therefore the correct answer is option C.
To learn more about Newton's second law, here refer to the link given below ;
brainly.com/question/13447525
#SPJ6
Maureen takes notes in class. Wave Interactions I. With Gases: A. Interference II. With Objects: A. Absorption B. Transmission a. Refraction C. Reflection D. Diffraction Which line of Maureen’s notes contains an error? I II II B II D
Answer:
I
Explanation:
Wave interaction is a phenomenon that explains how waves interact with the matter around us like. air, water, etc. There are different types of wave interactions like refraction, reflection, interference, and diffraction.
(i) Refraction occurs when a wave passes through a transparent surface and it bends slightly due to the change in its speed.
(ii) Reflection occurs when the wave strikes on a polished surface and bounce back in the same medium. In this wave, interaction light doesn't enter into the surface.
(iii) Interference occurs when two waves interact with each other at the same time and form a resultant wave of greater or lower amplitude.
(iv) Diffraction takes place when a wave passes along obstacles or through the slit. Due to which bending of light takes place.
Answer:
I
Explanation:
_____ is considered a significant digit when it is to the left or the right of the decimal point and it follows a non-zero digit, or when it is betwee two digits.
Answer:
Zero (0)
Explanation:
Zero is only counted significant in some cases, and some of those are listed in the question.
For eg, 0.0003 (here 0 is insignificant), however, 3000.003 (here all 0's are significant)
_______is the product of a force and the time during which the force acts
Answer:
impulse is the product of a force and the time during which the force acts
Explanation:
i hope this will help you :)
Which of the following is an example of heat convection?
Answer:
Liquid inside a beaker on a hot Bunsen burner circulates and heats through constant motion.
Explanation:
Transmission of heat by convection requires the movement of a liquid or gas. An example would be liquid in a beaker heating up as hot and cold parts of the liquid constantly circulate, which further heats the liquid. Heat from the sun is considered radiation, and the other two answers are examples of conduction.
The degree to which a liquid resists flowing is called _____.
Answer:
Viscosity is a measure of how much a liquid resists flowing freely.
Answer:
velosity is the anser
Explanation:
sorry for the spelling
what is the difference between LEO and GEO satellites? PLS ANSWER FAST
Answer: LEO satellites are low earth orbiting whereas GEO satellites are geostationary earth orbiting satellites.
Explanation: Satellites in low Earth orbit, or LEO, are the closest devices to Earth. You'll often hear the terms GEO and GSO used interchangeably, but they’re not always the same. Both types of satellites sit at roughly 22,300 miles above Earth’s surface, but the way they orbit is different.
A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its
speed?
A. 1.7 m/s
B. 2.4 m/s
C. 6 m/s
D. 3 m/s
Answer:
2.4
Explanation:
48,000/8000=6
square root of 6 = 2.44948974278
so 2.4
AnswerB.2.4m/s
Explanations;
24000=1/2×8000×v^2
24000/4000=v^2
√ 6.=v
v=2.4
Please help me in this question!! There is NO picture for this question! In a physics lab, 0.30 kg puck A, moving at 5.0 m/s [W], undergoes a collision with 0.40 kg puck B, which is initially at rest. Puck A moves off at 4.2 m/s [W 30° N]. Find the final velocity of puck B.
Answer:
v2 = 0.6 m/s
Explanation:
Given:
Mass(m1) = 0.30 kg
Initial velocity(u1) = 5 m/s
Mass(m2) = 0.40 kg
Initial velocity(u2) = 0 m/s
Final velocity(v1) = 4.2 m/s
Find:
Final velocity(v2)
Computation:
Using conservation of momentum.
m1u1 +m2u2 = m1v1 + m2v2
(0.30)(5) + (0.40)(0) = (0.30)(4.2) + (0.40)(v2)
1.5 + 0 = 1.26 + 0.40 v2
0.24 = 0.40 v2
v2 = 0.6 m/s
Which statement is true for objects in dynamic equilibrium?
Answer:
The correct answer to the question is objects have zero acceleration.
Explanation:
Before answering the question, first we have to understand dynamic equilibrium .
A body moving with uniform velocity is said to be in dynamic equilibrium if the net external forces acting on the body is zero. Hence, the body is under balanced forces.
If the external forces acting on a body is not balanced, then the body will accelerate which will destroy its equilibrium condition. Hence, the necessary and sufficient condition for a body to be in dynamic equilibrium is that the forces are balanced.
When a body is in dynamic equilibrium, the body moves with uniform velocity along a straight line unless and until it is compelled by some external unbalanced forces.
Hence, the rate of change of velocity or acceleration of the body will be zero.
Answer:
objects have zero acceleration.
Explanation:
A 24.8 tall object is placed in front of a lens, which creates a -3.09 cm tall image. What is the magnification?
Answer: 0.125
Explanation:
Given that the
Object height U = 24.8 cm
Image height V = 3.09 cm
Magnification M is the ratio of the image height to the object height. That is, divide the given image height by the given object height.
M = V/U
Substitute V and U into the formula above.
M = 3.09/24.8
M = 0.125
Magnification is therefore equal to 0.125 approximately
Answer:
-0.125.
Explanation:
The previous explanation is right except for that it doesn't take into account that the -3.09 is negative – therefore, the positive answer is incorrect.
-0.125 is correct on Acellus.
A force of 3300 N is exerted on a piston that has an area of 0.060 m².
What force is exerted on a second piston that has an area of 0.18 m??
Answer:
9,900 N
Explanation:
We know that the pressure in a fluid is transmitted with an equal pressure throughout, hence the formula [tex]pressure_1[/tex] = [tex]pressure_2[/tex]. As your know pressure is represented by force over area, so this formula can be rewritten as [tex]force_1/Area_1[/tex] = [tex]force_2/Area_2[/tex] .
3300 N / 0.060 m² = [tex]force_2[/tex] / 0.18 m²
Let's say that [tex]force_2[/tex] = x. Now let us solve for x.
3300 N / 0.060 m² = x / 0.18 m²,
3300 / 0.060 = x / 0.18,
55,000 = x / 0.18,
x = 55,000 [tex]*[/tex] 0.18 = 9,900 N - this is the force exerted on the second piston
Compute the conductivity of a conductor with a length of 2.0 cm and a cross-sectional area of 0.060 cm2, whose conductance is 3.5 x 103 ohms. σ = _____ ohm-1cm-1 A: 1.2 x 10 5 B: 2.9 x 10 -4 C: 1.1 x 10 2 D: 1.9 x 10 6
Answer: A
Explanation:
You are given the following parameters:
Length L = 2.0 cm and
cross-sectional area A = 0.060 cm^2
Conductance = 3.5×10^3 ohms
Conductance is a reciprocal of resistance R
Conductance = (σ × A)/L
Where σ = conductivity
Substitutes all the parameters into the formula
3.5×10^3 = (0.06 × σ)/2
Cross multiply
7×10^3 = 0.06σ
Make σ the subject of formula
σ = 7000/0.06
σ = 116666.67 ohm-1cm-1
σ = 1.2 ×10^5 ohm-1cm-1 approximately
Answer:
1.2 ×10^5
Explanation:
Which of the following is a personal decision that involves science A)It is immoral to cheat on your homework? B)what movie will I like the most this weekend? C)will an air purifier reduce the dust in my house? D)is $100 a reasonable price for a cell phone?
Answer:
C because air purifier is very essential in dusty homes .
Answer:C
Explanation: The answer is C because an air purifier purifies the air in your room which is science.
Which term describes an observable fact, event, or circumstance?
A. Experiment
B. Theory
C. Hypothesis
D. Phenomenon
Answer:
Phenomenon
Explanation:
phe·nom·e·non
/fəˈnäməˌnän/
noun
1.
a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question:
"glaciers are unique and interesting natural phenomena"
synonyms
occurrence, event, happening, fact, situation, etc.
2.
a remarkable person, thing, or event:
"the band was a pop phenomenon just for their sales figures alone"
synonyms
marvel, sensation, wonder, prodigy, miracle, etc.
HELPPP PLEASEEE!!!!!
Speed of sound and temperature
Drag the item bank to its corresponding match
Answer:
1) The speed of sound increases
2) 440 Hz
3) 29°C
4) 17°C
5) 434 Hz
6) 12 m/s
7) 17.3 m
Explanation:
1) The speed of sound increases
2) V = f×λ
f = V/λ = 343/0.78 = 439.744 ≈ 440 Hz
3) V = f×λ
512 × 0.68 = 348.16 m/s
348.16 - 331 = 17.16
T = 17.16/0.6 = 28.6 ≈ 29°C
4) Increase in speed = 350 - 340 = 10
Increase in temperature = 10/0.6 = 16.67° ≈ 17°C
5) f = V/λ = 343/0.79 = 434 Hz
6) 331 + 0.6×30 - (331 × 0.6 ×10) = 12 m/s
7) V = 331 + 0.6×25 = 346m/s
λ = 346/20 = 17.3 m
when taking a shower are girls suppose to wipe front to back ?
Answer:
Explanation:
I don't think it matters while taking a shower, however, while using the restroom, it is especially encourgaed to wipe front to back. The reasoning behind this is to prevent UTI's that are transferred by fecal particles and bacteria from the anus into the vagina. Hope this helps:)
PLS ANSWER (SCIENCE QUESTION) I WILL MARK U AS THE BRAINLIEST!!! PLS ANSWER REALLY EASY!!
Q1. Fill in the blanks:
1. __________________ are the building blocks of matter.
2. Each ________________ has a chemical symbol.
3. ________________ is used in oxy- acetylene flame for welding.
4. Noble gasses are also called __________________.
5. Dimitri Ivanovich Medeleeve arranged the elements systematically in _______________
6. Elements are the simplest kind of __.
7. Metals have __ melting and boiling points.
8. As you move from the left side of the periodic table to the right side, the elements become __________ .
Answer:
1. Atoms
2. element
Which reaction takes place in a nuclear fission reactor?
Answer:
Last option in the list of possible answers, with U235 and n (neutron) in the left (originators) of the reaction diagram.
Explanation:
Uranium 235 (which is a fissile isotope of uranium) plus slow neutrons is what produce the chain reaction that feeds nuclear reactors.
Answer:
D
Explanation:
Did the test
Becky has a younger sister. If the sister was half Becky's age when Becky was 6, and Becky is now 70, how old is Becky's sister?
Answer:
67
Explanation:
Answer:
35
Explanation:
It's a trick question!
Because the younger sister was half the age of Becky when she was 6. She also has to be half the age of Becky today.
So, 70 ÷ 2 = 35
Hope this helps you out! : )
What information does a free-body diagram show?
A. The net force acting on a falling object
B. The smallest force acting on an object
C. The largest force acting on an object
D. All of the force vectors acting on an object
Answer:
d
Explanation:
In physics and engineering, a free body diagram (force diagram, or FBD) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition.
Answer: All of the force vectors acting on an object.
How many electrons do carbon and oxygen share
Answer:
1
Explanation:
To satisfy the Octet Rule, Carbon needs 4 more valence electrons. Since each Oxygen atom has 3 lone pairs of electrons, they can each share 1 pair of electrons with Carbon; as a result, filling Carbon's outer valence shell
Answer:
The Answer Is 4!!
Explanation:
Hope This Helps:)))
Can u please help me .
Answer:
34 A
35 13 A
Explanation:
34 The variation of the voltage across the resistor with time in an alternating current circuit is given by the relation;
[tex]\Delta V_R \cdot sin(\omega \cdot t)[/tex]
Where:
ω = Angular speed = 2πf
t = time
ω·t = Constant
Therefore, the voltage is the sine wave for which is at 0 we have sin(0) = 0 and varies between 1 and -1
The correct option is A
35 The required fuse for an appliance is one that will be able to function at the current rating and trip in the event of an over-current
Given that the current rating of the electric heater = 10 A
The current rating of the cable = 15 A
We select a fuse that will be between the rating of the attached cable and the power rating of the electric heater to serve as the protective device for the heater, therefore the most appropriate fuse = 13 A such that;
10 A < 13 A < 15 A