Answers
Answer:
B
Explanation:
Related Questions
Victor put a match on a balance and found that its mass was 6.0 grams. Then he lit the match and put it out after a few seconds.
He put the partially burned match on the balance again. This time, its mass was 4.5 grams.
Which of the following best explains what happened as the match burned?
A.
Some of the mass was destroyed by the fire.
B.
The matter moved to a different part of the match.
C.
Some of the matter changed from solid to gas and went into the air.
D.
The mass of the match combined with the mass of the fire.
Answers
Answer:
b
Explanation:
A positive charge moving with a constant velocity v enters a region
of a uniform magnetic field pointing to the top of the page. What
is the direction of the magnetic force on the charge?
A. Left.
B. Right.
C. To the bottom of the page.
D. To the t&p of the page.
E. There is no magnetic force on the charge.
Answers
A tank containing water up to a depth of 650 mm is stationary. Find the force exerted by fluid of specific gravity 0.55 on the side of tank, width of tank is 1.5m. Ρ water = 1000 kg/m³:
Answers
Answer:
3415.91 N
Explanation:
We know pressure, P at depth, h is P = ρgh where ρ = density of fluid = specific gravity × density of water = 0.55 × 1000 kg/m³ = 550 kg/m³, g = acceleration due to gravity = 9.8 m/s² and h = depth of water = 650 mm = 0.650 m
So, P = ρgh
= 550 kg/m³ × 9.8 m/s² × 0.650 m
= 3503.5 N/m²
Now pressure P = F/A where F = force on the side of tank and A = area of side of tank = depth of water × width of tank = 0.650 m × 1.5 m = 0.975 m²
So, F = PA
= 3503.5 N/m² × 0.975 m²
= 3415.913 N
≅ 3415.91 N
A bowling ball with 218 J of kinetic energy is moving at 8.0 m/s. What is the mass of the bowling ball?
Answers
218= 0.5(m)(8)^2
218= 32m
M= 6.8125
Julio has a green plant on his bedroom window sill. This summer Julio and his family will be traveling. No one will be home for month. Which is julio most likely to find when he returns home from his trip
Answers
Answer:
Explanation:
A withered plant. Unless the plant is one of the many plants that have huge water retention capacity, for example, cactus. Such plants also don't need water to gr6, they just need a tiny amount of water, ba sufficient sunlight to enable them complete photosynthesis.
Any other plants asides one of the many like that, he will definitely come back to a dead, or at best, withered plant. A month is too long a time to not take care of your plant and expect it to still be up and running
Explain why a sound becomes louder as you move closer to the source of the sound.
Answers
Answer:
The wavelength of frequency of the sound are closer to each other
Or
The frequency of the sound increases as it moves towards you
Lee knew that certain events occur to create new material in the process of sea-floor spreading. Rearrange the steps into the correct order by placing the event that happens first at the top. Place the event that occurs last at the bottom.
Answers
Answer:
Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other. ... As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.
Explanation:
did this help???
The correct order for in a breach in the Earth's crust, molten material pours upward is (2), (3) and (4).
What is the earth's crust?The Earth's Crust is the planet's outermost layer. The Crust is a portion of the lithosphere that lies above the mantle and comprises tectonic plates that provide a platform for all land on Earth.
We have:
Lee knew that certain events occur to create new material in the process of sea-floor spreading.
The correct order for in a breach in the Earth's crust, molten material pours upward:
The molten material hardens into solid strips of rock on both sides of the crack.The ocean floor on both sides of the crack moves farther away from the mid-ocean ridge.The ocean floor gradually becomes wider.Thus, the correct order for in a breach in the Earth's crust, molten material pours upward is (2), (3) and (4).
Learn more about the earth's crust here:
https://brainly.com/question/13220510
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if when the sun comes out a road expands more than the dirt it is on it means
Answers
Answer:
the road has a larger coefficient of linear expansion than the dirt
This parallel circuit has three resistors R1-120 ohm; R2-45 ohm: R3=360
ohm and a power source of 240 volts.. Find the total resistance of the
circuit.
O 2.491 ohm
O 1.382 ohm
O 0.582 ohm
O 0.033 ohm
Answers
Answer:
the answer is 30 Ohms. Not found in the options provided
I Need Help, Thank you! ^^ <3
How can global warming lead to changes to the Earth’s surface?
a.
Global warming can lead to an increased number of earthquakes, which change the Earth’s surface.
b.
Global warming can lead to glaciers melting, causing flooding to areas and the decrease of glacial land masses.
c.
Global warming leads to a decrease in water levels of coastal wetlands.
d.
Global warming cannot lead to changes to the Earth’s surface.
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
A
Explanation:
But global warming will have additional, far-reaching effects on the planet. Warming modifies rainfall patterns, amplifies coastal erosion, lengthens the growing season in some regions, melts ice caps and glaciers, and alters the ranges of some infectious diseases.
Answer:
I think it is B since Global warming can lead to glaciers melting and cause flooding since the water will get warmer resulting in the ocean rising, which causes flooding
Explanation:
Samantha is identifying different minerals she found on vacation. Which property of the minerals will Samantha be LEAST able to determine by using only her eyes? A. Color B. Hardness C. Luster D. Texture
Answers
Answer: b
Explanation:
Given
Samantha is identifying different minerals by her eyes only. She will able to make a certain judgment for color, luster, and texture but not for hardness.
Hardness is the property of the material which tells about the resistance to the deformation. So, it is impossible to determine the hardness just by looking at the material. We need to perform certain tests like Brinell's hardness test, Vicker's hardness test.
a bullet of mass 120g is fired horizontally into a fixed wooden block with a speed of 20m\s. The bullet is brought to rest in a wooden block in 0.1secs by a constant resistance
calculate the;(I) magnitude of the resistance
(ii) distance moved by the bullet in the wood
Answers
Answer:
1) F = 24 N
2) Distance = 1 m
Explanation:
We are given;
Mass; m = 120 g = 0.12 kg
Initial velocity; u = 20 m/s
Final velocity; v = 0 m/s since it came to rest.
Time; t = 0.1 s
We can calculate acceleration from Newton's first equation of motion;
a = (v - u)/t
a = (0 - 20)/0.1
a = -200 m/s²
1) magnitude of the resistance will be;
F = ma
F = 0.12 × (-200)
F = -24 N
Since, we are dealing with the magnitude, we will take the absolute value. Thus, F = 24 N
2) To find the distance moved by the bullet, we know that;
Distance = Average speed × time
Thus;
Distance = ((v + u)/2) × t
Distance = ((0 + 20)/2) × 0.1
Distance = 1 m
How are radio waves modified to send information?
Answers
Answer:
Radio waves can be modified by their amplitude or frequency in order to transmit sound or data.
Explanation:
Hope this helped!!!
Can anyone help me with this question please
I’ll mark as brainliest
No links.
Answers
the transverse Wave which is Answer:2
Answer:
1
Explanation:
amplitude is the maximum distance from the rest of the particles. amplitude is thus measured from the rest position to the peak of a crest or of a trough.
as seen below, graph 1 has an amplitude of 1 while both graph 2 and 3 has an amplitude of 2.
How will the boat be affected if it enters a part of the river where the current is moving south at 2 m/s?
Answers
Answer:
The boat is most likely to crash or sink since the water will be very rapid and pacing.
How much power is needed to move a 2000 kg mass from the bottom of the 150 m talk great pyramid in Egypt up a ramp if the ramp has a mechanical advantage of 4 and it takes the workers 30 minutes to move the mass?
Answers
Answer:
How Heavy? More than 2,300,000 limestone and granite blocks were pushed, pulled, and dragged into place on the Great Pyramid. The average weight of a block is about 2.3 metric tons (2.5 tons).
Explanation:
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answers
Answer:
A, and D are the answers
Explanation:
The pulley. It is located where the bicycle chain and gears are. The chain is wrapped around the pulley which turns and causes the wheel to turn on its axle.
The magnetic field of a bar magnet Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Always points from north to south, whether we look outside the magnet or inside the magnet. b Always points from south to north, whether we look outside the magnet or inside the magnet. c Points from north to south outside the magnet, but south to north inside the magnet. d Points from south to north outside the magnet, but north to south inside the magnet.
Answers
Answer:
A: Always points from north to south, whether we look outside the magnet or inside the magnet
Explanation:
When we freely suspend a bar magnet, it's magnetic field will always rest in the north to south direction due to the fact that the Earth's magnetic south pole usually lies in the direction of the geographic north while the Earth's magnetic north pole usually lies in the direction of the geographic south.
Now, we all know that in magnets, like poles will repel and unlike poles will attract. What this now means is that the magnet will always point from the north to the south direction.
1. How can you explain the sound has energy?
Answers
Answer:
Sound energy is produced when an object vibrates. The sound vibrations cause waves of pressure that travel through a medium, such as air, water, wood or metal. Sound energy is a form of mechanical energy.
Explanation:
A 12kg aluminum box is sliding along a horizontal steel surface while experiencing a rightward applied force of 60N. The box has a displacement of 20m. What is the Net Force acting on the box? *
A.)60N
B.)117.72N
C.)4.67 N
D.)-55.33N
Answers
What are the methods of plotting the magnetic field?
Answers
Answer:
The method explained below shows the plotting of magnetic field lines with the help of a small compass needle:
Procedure:
1. With the help of some board pins, fix a sheet of paper on a drawing board.
2. At point 1 as seen in the below figure, place a small compass needle. From the top of the needle, mark two pencil dots at exactly two ends of the needle.
3. Move the needle to the compass to point 2 so that one end of the needle coincides with the second pencil dot.
4. The process of moving the compass needle to points 3, 4, 5… is continued in order to get a few dots.
5. When various dots are joined, a straight line is obtained.
6. Hence, one line of magnetic field of earth is traced.
Starting from a different point, the process is repeated and another line of magnetic field is traced out. This way a few several lines of magnetic field can be traced out. Every line is required to be labelled with the help of an arrow from the south pole of the needle towards the north pole to represent the direction of the magnetic field. The figure below depicts several magnetic lines that are obtained this way.
Answer:
please give me brainlist and follow
Explanation:
Magnetic fields can be mapped out using small plotting compasses : place the plotting compass near the magnet on a piece of paper. mark the direction the compass needle points. move the plotting compass to many different positions in the magnetic field, marking the needle direction each time.
what is the relationship between harmonics and resonance frequency in a piano
Answers
Most vibrating objects have more than one resonant frequency and those used in musical instruments typically vibrate at harmonics of the fundamental. A harmonic is defined as an integer (whole number) multiple of the fundamental frequency.
There is direct relationship between harmonics and resonance frequency.
A harmonic is a wave with a frequency that is a positive integer multiple of the frequency of the original wave whereas, resonance frequency is the frequency at which the oscillation reaches to its maximum point. The lowest resonant frequency is known as the fundamental, while on the other hand, the higher resonant frequencies are called overtones. All resonant frequencies are multiples of the fundamental, and are called harmonics. So we can conclude that there is a direct relationship between harmonics and resonance frequency.Learn more about harmonic here: https://brainly.com/question/17315536
Learn more: https://brainly.com/question/23262887
We can use energy principles to make ____ predictions.
Answers
What do scientists use satellites for?
(there is no science colum)
Answers
Answer:
NASA satellites help scientists study Earth and space. Satellites looking toward Earth provide information about clouds, oceans, land and ice. They also measure gases in the atmosphere, such as ozone and carbon dioxide, and the amount of energy that Earth absorbs and emits. And satellites monitor wildfires, volcanoes and their smoke.
Explanation:
Hope this helps! :) have a great day.
1. GPS
2. Internet
3. Weather forecast
4. Observation
5. Experiments
6. Discovery
Gamma ray technology can be used to do which of the following?
A. Monitor human activity at night
B. Treat tumors in the body
C. Speed up the process of hardening paint
D. Communicate across long distances
Answers
Answer:
b
Explanation:
radiation can treat tumors.
Answer:
B. Treat tumors in the body
Explanation:
took quiz
Is weight AFFECTED by gravity?
YES, the force of gravity determines how much you weigh.
NO, regardless of gravity, you will always weigh the same. w
Answers
Answer:
This answered one of my questions, thanks
Explanation:
Answer:
the answer is NO regardless of gravity, you will always weigh the same.
Explanation:
Look up about 3 centimeters ⬆️
How old is Earth and what do we use to keep track of major Earth events?
Answers
Explain how energy that comes from the outside of the Earth system drives the flow of water on surface currents.
Answers
Answer:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
Explanation:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
Manny walked a total of 3 miles. The reference point used to calculate the total distance that he walked was the same as the ending point. Which describes where Manny most likely walked?
Answers
Correct question:
Manny walked a total of 3 miles. The reference point used to calculate the total distance that he walked was the same as the ending point. Which describes where Manny most likely walked?
a. from the bottom of a hill to the top
b. on a circular nature trail
c. on a sidewalk from his house to the mall
d. from the beginning of a straight track to the end
Answer:
b. on a circular nature trail
Explanation:
As it is mentioned that Manny that his reference point from where she started is same as ending point meaning that she moved in a circular path making point B correct answer.
Answer:
on a circular nature trail
Explanation:
What is the momentum of a 4 kg object moving west at 4 m/s?*
O 12 kg*m/s (east)
O 1.33 kg*m/s (west)
O 16 kg*m/s (east)
16 kg*m/s (west)
Answers
Answer:
16kg*m/s west
Explanation:
P=M*V
Momentum= Mass time velocity, plug it into the formula,
M is 4 and V is 4, 4*4=16, and since the object is moving west its going to be west.
basically saying in simpler terms,
16=4*4