Jesse travels 3.0 meters east and then turns and travels 4.0 meters north. Which of the diagrams below illustrates his displacement?
Answers are in the diagram below.
Choose one.
And I will mark the right answer The Brainliest.
Answer: the Fourth diagram
Explanation: The fourth diagram shows movement from her origin with the arrows indicating her movement 3metres east, from where she turns north and walks 4 metres the arrows indicates that. The resultants 5meters indicates her return back to her starting point with the arrow pointing at the tail of the 3metres.
Andesitic rocks have mineral compositions between those of ____ and basaltic rocks.
a. conglomerate
c. granitic
b. metamorphic
d. organic
The answer is Granitic rock
Explanation:Granite is a light-colored igneous rock with pieces that are large enough to be visible with the naked eye. It is formed from the slow crystallization of magma below Earth's surface which we call as lava. Granite is composed mainly of quartz and feldspar with very small amounts of mica, amphiboles, and other minerals. If we talk about Andesitic rocks, they contain mineral compositions between those of granite and basaltic rocks.
An object has a kinetic energy of 275 j and a momentum of magnitude 25.0 kg · m/s. find the (a) speed and (b) mass of the object.
Answer: The correct answers are 482.4 m/s and 21.96 kg.
Explanation:
The expression for the kinetic energy in terms of momentum of an object is as follows;
[tex]KE=\frac{p^{2} }{2m}[/tex]
Here, KE is the kinetic energy, p is the momentum and m is the mass of the object.
It is given in the problem that an object has a kinetic energy of 275 j and a momentum of magnitude 25.0 kg · m/s.
Calculate the mass of the object.
[tex]KE=\frac{p^{2} }{2m}[/tex]
Put p=25.0 kg · m/s and KE= 275 J.
[tex]m=\frac{25^{2} }{2(275)}[/tex]
[tex]m=1.14 kg[/tex]
Calculate the speed of the object.
[tex]KE=\frac{1}{2} mv^{2}[/tex]
Put m= 1.14 kg and KE= 275 J.
[tex]v=\sqrt{\frac{2(275)}{1.14} }[/tex]
v=21.96 m/s
Therefore, the speed of the object is 21.96 m/s and the mass of the object is 1.14 kg.
Whats number 4 ?????????
Which of the following represents the greatest energy transition from a higher energy level to a lower one?
emission of a blue photon of 450 nm
emission of a red photon of 770 nm
emission of a green photon of 550 nm
emission of a yellow photon of 590 nm
Final answer:
The greatest energy transition from a higher energy level to a lower one is represented by the emission of a blue photon of 450 nm.
Explanation:
The greatest energy transition from a higher energy level to a lower one is represented by the emission of a blue photon of 450 nm. This is because the energy of a photon is inversely proportional to its wavelength. As the wavelength decreases, the energy increases. Since blue light has a shorter wavelength than red, green, and yellow light, it has the highest energy.
How many atoms of each element are in the chemical formula P2O5?
2 phosphorus and 5 oxygen
5 phosphorus and 2 oxygen
1 phosphorus and 5 oxygen
2 phosphorus and 1 oxygen
the answer is the last one
Answer:
2 phosphorus and 5 oxygen
Explanation:
The chemical formula of the substance is:
[tex]P_2 O_5[/tex]
where each subscripts indicates the number of atoms of each element. We see that P (phosphorus) has a subscript '2' while O (oxigen) has a subscript '5', so the correct answer is
2 phosphorus and 5 oxygen
Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?
Cellular phones use _____?
A) radar waves
B) very high-frequency waves
C) very low-frequency waves
D) microwaves
3. D-Microwaves
1. C-electromagnetic spectrum
2. B-radio waves
^^(for those doing the three question physical science test)
as an object falls freely toward earth, the object's momentum is
1. decreses
2. inceases
3. remains the same,
The object's momentum remains the same as it descends freely toward the earth.
So, option 3. is correct.
Define momentum.Momentum is a measurable quantity that exists because an object is moving and has mass. The mass multiplied by the velocity equals momentum. If an item is stationary, its velocity is zero, and it has no momentum.
When an object descends toward Earth, it accelerates due to gravity, accumulating speed and momentum until the upward force of air resistance equals the downward force due to the object's weight under gravity, a point known as terminal velocity.
The law of conservation of momentum asserts that the overall momentum of objects that interact does not change in the absence of external forces such as friction.
So,
The object's momentum 3. remains the same as it descends freely toward the earth.
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is the following chemical equation balanced? 2Na + 2H 2 O 2NaOH + H 2
Yes it is.
There are 2 Na atoms on each side,
there are 4 H atoms on each side (2H and H₂),
there are 2 O atoms on each side.
This means that the equation is even (not accounting for energy loss or anything like that).
If the strength of the magnetic field at A is 10 units, the strength of the magnetic field at B is
A)640 units
B)6.4 units
C)2.5 units
D)1.25 units
Which of the following are metalloid elements?
Check all that apply.
A. Boron (B)
B. Phosphorus (P)
C. Silicon (Si)
D. Tin (Sn)
E. Lead (Pb)
As part of the photoelectric effect, which of these is responsible for the pixels in an image on a digital camera?
A. accumulated electrons that are absorbed by the image sensor.
B. accumulated electrons that are ejected by the image sensor.
C. accumulated photons that are ejected by the image sensor.
D. accumulated photons that are absorbed by the image sensor.,
Answer:
It's B) accumulated electrons that are ejected by the image sensor
On edge 2020
Explanation:
Which statement describes what most likely occurs when a compass is placed next to a simple circuit made from a battery, a light bulb, and a wire?
A. A magnetic field created by the compass increases the current in the electrical circuit.
B. A magnetic field created by the compass causes the light bulb to stop working.
C. A magnetic field created by the electric current places negative charges on the compass.
D. A magnetic field created by the electric current causes the compass needle to move.
In this circuit A magnetic field created by the electric current causes the compass needle to move. hence option D is correct.
Faraday's law of induction ?Faraday's law states that "change in a magnetic field produces electric field in the circuit". It can also be stated as " when magnetic flux linked to a circuit changes, an electromotive force is induced in the circuit which is proportional to the rate of change of the flux".
If the wire shown in the circuit is non coated with insulated material. Current flowing through the circuit produces magnetic field around it. This produced magnetic field affects the magnetic field of middle of the compass. Created magnetic field of wire attract needle due to its magnetic field, as a result needle moves.
Hence option D is correct.
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The sound intensity of street traffic is about 107 times greater than the threshold of hearing. what is the relative intensity of street traffic? use the formula
Homeowners will typically have their heaters set for about 140 degrees F. What is that temperature in C.
To convert 140 degrees Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and multiply the result by 5/9, resulting in 60 degrees Celsius.
To convert a temperature from Fahrenheit to Celsius, we can use the formula: C = (F - 32) × 5/9, where F is the temperature in degrees Fahrenheit and C is the temperature in degrees Celsius. So, for a heater set to 140 degrees Fahrenheit, the conversion to Celsius would be:
C = (140 - 32) × 5/9
C = (108) × 5/9
C = 60
Therefore, 140 degrees Fahrenheit is equal to 60 degrees Celsius. This knowledge is essential when discussing the power needed to keep a house warm, as energy requirements are usually given in watts per degree Celsius (W/°C).
20 points BRAINLIEST!!! ASAP ANSWER
Choose one piece of evidence. Explain, in your own words, how it supports the Big Bang Theory.
A. Redshift
B. CMB
C. Hydrogen and Helium
D. Less Evolved Distant Galaxies
Which are true statements?
Check all that apply.
A. 1 mol is 6.02 × 1023 of something.
B. 6.02 × 1023 g is the weight of 1 mol.
C. The mass of 1 mol is the same as the atomic mass in grams.
D. A mole is the atomic mass.
A rock is thrown upward with an initial velocity of 16 ft/s from an initial height of 5 ft. write a quadratic function equation that describes the height h at time t.
The quadratic function equation that describes the height of the rock is h = -16t^2 + 16t + 5.
Explanation:To write a quadratic function equation that describes the height h at time t, we can use the kinematic equation for vertical motion: h = -16t^2 + 16t + 5. This equation represents the height of the rock as a function of time, taking into account the initial height, initial velocity, and acceleration due to gravity. The coefficient -16 in front of t^2 accounts for the downward acceleration of the rock.
Write the value 299,792,458 m/s in proper scientific notation to 4 significant figures. 2.998 × 108 m/s 2.997 × 108 m/s 2.998 × 106 m/s 2.997 × 106 m/s
Could someone help with these two answers please?
If the air inside a balloon exerts a force of 1.5 N on an area of 0.5 m², what is the pressure inside the balloon?
A. 0.5 N/m²
B. 1.5 N/m²
C. 2.5 N/m²
D. 3 N/m²
As your airplane takes off from an airstrip on the ground and rises 30,000 feet into
the sky, what happens to the air pressure on the outside of the airplane?
A. The air pressure decreases.
B. The air pressure increases.
C. The air pressure stays the same.
D. More information is needed.,
I need help with 2 questions . Please help c:
1 . According to the nebular theory, the solar system formed from ?
accretion of protoplanets.
a large, thin cloud of dust and gas.
colliding planetesimals.
all of the above
2. Which of the following statements explains why the terrestrial planets are small and rocky instead of large and less dense like the gas giants?
The inner planets were exposed to much higher temperatures.
Ice-forming compounds vaporize at high temperatures.
Rock-forming materials can condense at high temperatures.
all of the above
The closeness of measured values to an accepted value is the BLANK of the data ?
1. Show how the alternative definition of power, found in your book, can be derived by substituting the definitions of work and speed into the standard definition of power, P = W / delta t.
2. A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the Law of Conservation of Energy? Explain why or why not.
James rode his bike 0.65 hours and traveled 8.45 km. What was his speed?
Final answer:
James's average speed was calculated by dividing the distance he traveled, 8.45 km, by the time it took, 0.65 hours, resulting in an average speed of 13 km/h.
Explanation:
To find James's speed, you need to divide the total distance he traveled by the total time it took him. In this case, the distance traveled is 8.45 km and the time is 0.65 hours. Use the formula speed = distance/time to calculate the speed.
The calculation would be:
Convert time to the same unit as speed (hours to minutes or kilometers per hour). Here, the time is already in hours.Divide the distance by the time: 8.45 km ÷ 0.65 hours = 13 km/h.So, James's average speed while riding his bike was 13 kilometers per hour (km/h).
The typical speed is the all out distance went by the item in a specific time stretch. The typical speed is a scalar amount. It is addressed by the greatness and doesn't have heading.
Know the characteristics of a solid, liquid, gas, plasma. (Definite shape/ volume?)
Work output of a large machine in a factory is 89,000 joules, and it’s input is 102,000 joules. Work output of a similar machine is 92,000 joules, and it’s work input is 104,000 joules. Which machine has a greater efficiency
Answer:
The machine with work input of 104,000Joules and work output of 92,000 has the greater efficiency
Explanation:
Efficiency of a machine is the ratio of work done by a machine(work output) to work put in the machine (work input).
Mathematically,
Efficiency = Work output/Work Input ×100
For the machine with work output of 89,000Joules and work input of 102,000Joules, its efficiency will be;
Efficiency = 89,000/102,000×100
Efficiency = 87.5%
Similarly for the other machine with work output of 92,000Joules and work input of 104,000Joules, its efficiency will be;
Efficiency = 92,000/104,000×100
Efficiency = 88.5%
Comparing the efficiency of both machines, the machine with efficiency of 88.5% has greater efficiency.
True or false, The golf club is swung in a northernly direction, and that is the direction the ball travels
Final answer:
The statement is false since merely swinging the golf club in a northern direction does not ensure that the ball will travel in that direction due to external influences like wind and gravity, much like an airplane can be blown off course.
Explanation:
The statement "The golf club is swung in a northernly direction, and that is the direction the ball travels" is false. In physics, particularly when discussing vectors and motions, the direction that an object is initially moved by a force (like a golf club hitting a ball) does not necessarily dictate that the object will continue to move in that initial direction. Various other forces and factors can influence the trajectory. For example, merely swinging the club in a northern direction does not account for factors such as wind, slope of the ground, spin of the ball, and gravity, all of which can alter the path of the golf ball.
Consider the analogy provided using an airplane's motion. An airplane heading north can be moved off that northward path by the wind, causing it to drift westward. Similarly, swinging the golf club in one direction does not guarantee the ball will follow that path precisely. Additionally, according to physics, when a magnet breaks, all pieces will indeed still have north and south poles, indicating that the physical direction is not the only factor determining the outcome—in both magnetism and ball trajectory.
An electric generator transforms mechanical energy into electrical energy. This process could be done by which of these?
A) Using wind to spin a magnet around.
B) Connecting a battery to a coil of wire.
C) Turning a wheel that contains electrons.
D) Spinning a coil of wire near a large magnet.
Answer:
D) Spinning a coil of wire near a large magnet.
Explanation:
From Faraday's law of induction, when a conducting coil of wire is placed in changing magnetic flux, an emf is induced which produces current in the coil.
Induced emf is given by:
[tex]e = -\frac{d\phi}{dt}[/tex]
A generator is based on the same principle.
The mechanical energy of rotating coil is converted to electrical energy when current is induced. Thus, the correct option is D) Spinning a coil of wire near a large magnet.
An electric generator converts mechanical energy into electrical energy via electromagnetic induction, which is achieved by spinning a coil of a wire near a large magnet. This process is described accurately in option D of the multiple choice question.
Explanation:An electric generator operates on the principle of electromagnetic induction, which was discovered by Michael Faraday. It involves the conversion of mechanical energy into electrical energy by spinning a magnet within a coil or spinning a coil within a magnetic field. Therefore, the correct answer to which process transforms mechanical energy into electrical energy in an electric generator is D) Spinning a coil of wire near a large magnet.
This process generates an electromotive force (emf) that results in the flow of electric current. The other options mentioned, such as using wind to spin a magnet around (A), connecting a battery to a coil of wire (B), or turning a wheel that contains electrons (C), do not accurately describe the fundamental operation of an electric generator.
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Which is not a protection against electrical accidents?
a. fuse
b. conducting wire
c. insulation
d. grounded plug