Answer:
Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.
Explanation:
Hope this helps maybe...
A bicycle and a tennis ball are both at the top of a hill storing potential energy. If they both start rolling down the hill at the same time, which one will have the most
kinetic energy?
Answer:
a bicycle has more kinetic energy cuz kinetic energy depends on mass and velocity.bicycle has more mass than a tennis ball.
2 Select the correct answer. In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for this chemical reaction? O A Energy is absorbed in the reaction. OB. Energy is released in the reaction. OC. There is no transfer of energy in the reaction. OD Energy is lost in the reactlon. Reset Next ghts reserved.
Answer:
B Energy is released
Explanation:
I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!
Answer:
static friction
Explanation:
On a trip you travel at a constant speed of 25 kilometers per hour South for 1 hour. You then turn West and travel at a constant speed of 50 kilometers per hour for 2 hour. Calculate your velocity for the trip.
Answer:
41.66 km/h
Explanation:
Calculate the distance of 1st travel :
v = d/t
25 km/h = d/1 h
d = 25 km/h × 1 h
d = 25 kmCalculate the distance of 2nd travel :
v = d/t
50 km/h = d/2 h
d = 50 km/h × 2 h
d = 100 kmCalculate the velocity of trip :
v = d/t
v = (25 + 100)/(1 + 2)
v = 125 km/3 h
v = 41.66 km/hSo, my velocity for the trip is 41.66 km/h
If you throw a ball into the air, Earth exerts a force on the ball. The ball in the air exerts no force.
Answer:
If an unbalanced force is acting on a rope, the rope will accelerate In The Direction Of The Unbalanced Force. The speed you read on your speedometer is the Constant speed.
Explanation:
did it on edge
How much energy does your soda lose if 25.0g of water condenses on the outside of the can?
The mass given is 25.0 grams. As for the change in temperature, I will assume that it start off at room temperature, 25°C.
Which are examples of chemical weathering? Choose the two correct answers. (1 poir
-rock breaking apart during a rock slide
-an insect digging a hole in rock for its home
-oxidation of certain metals in rock
-an increase in temperature in daytime causing a rock to crack
-acid rain breaking down compounds in rock statues
Oxidation of certain metals in rock and acid rain breaking down compounds in rock statues are examples of chemical weathering.
What is chemical weathering?
When chemicals are diluted and dissolved in water, they seep and percolate down the surfaces of rocks, causing chemical weathering. Chemical weathering occurs in humid tropical regions and other places with high temperatures and a sufficient supply of water.
The reaction of chemicals in water or air causes minerals to change in composition as chemical weathering takes place. Additionally, this causes the breakdown of rocks. Leaching is the process of carrying away some components of rock breakdown through rocks and soil.
These materials may eventually be transported by the water to rivers and the sea. The oceans' saltiness comes from this source. Oxidation, the breakdown of calcium carbonate, and acid rain breaking down compounds in rock statues by chemical reaction are examples of chemical weathering.
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what are effects of gravity??
Anyone help me
Answer: Gravity has an effect of a gravitational pull, which keeps things on the ground instead of floating around like we are in space.
Answer:
hello
The sun's gravity keeps Earth in orbit around it, keeping us at a comfortable distance to enjoy the sun's light and warmth
Explanation:
hope it helps
good day
tysm ☀❤✅✌
+50 POINTS!!
SOMEONE PLEASE HELP!!!! I CANT FIND ANYTHING ELSE TO HELP ME WITH THIS!!!
Measure a pencil, end to end. Draw a sketch of the pencil and show your measurements. If you were to balance the pencil horizontally on your finger, where do you think it would be balanced? Note this on your sketch, and write down your hypothesis (distance from each end) and your prediction.
Now test your hypothesis. Balance the pencil on your finger horizontally. When it is balanced, your finger is at the center of gravity. Note and make a mark where your finger is in relation to each end of the pencil.
Measure from one end of the pencil to where your finger balanced it. Show this on your sketch, and record the data it in your chart.
Repeat steps b-c a second time for the pencil.
Repeat steps a - d using a pen and crayon as well.
What are your results? Compare your results with your hypothesis and then write an explanation in a conclusion. Which item has a center of gravity closer to the actual center that you measure?
Answer:
my pencil is about and 1/2 inches
i think it would be in the middle about 1 inch away
my hypothesis was wrong he was like a 1/2 inch on one he right side and he left didn't
Explanation:
hope this helps
make a island with all renewable energy soursws and how it works and about it but at year 9 level
Answer:
How are we expected to make an island
1. A race car accelerates uniformly from 19.5 m/s to 50.1 m/s in
2.47 seconds. Determine the acceleration of the car.
The acceleration of the car is 79.8.
Answer:
12.39m/s²
Explanation:
use the formula a=v-u
t
Describe how energy is transferred in one of the sequences.
Answer:
Energy transfer describes the changes in energy (a state function) that occur between organisms within an ecosystem. ... A food chain is a sequence of organisms that are connected by their feeding and productivity relationships; a food web is the interconnected set of many food chains. Energy transfer is a one-way process.
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Barnard's star distance from earth in light years
Answer:
5.978 años luz
Explanation:
Hi! Your answer is: The distance between the Barnard's star and Earth is 5.978 light years.
4. Looking at the picture below, the DISTANCE traveled by this person
starting at position A to B to C to D to Ais*
Answer:
The distance traveled is 24 meters but the change in position is 0 meters because the person comes back to the same point.
Explanation:
To be straight it is 24 meters.
Graphs show relationships between two or more variables. Which three features describe a line graph?
A.
Shows how a variable changes in relation to another variable
done
B.
Has an x-axis and a y-axis
C.
Shows the dependent variable on the x-axis
D.
Has neither an x-axis nor a y-axis
done
E.
Shows the independent variable on the x-axis
Answer:
A, B, and E
Explanation:
C and D are wrong;
Line graphs do not show the dependent variable on the x-axis.
Line graphs do have both an x-axis and a y-axis.
What is the kinetic energy of your car if it has a mass of 100kg and is driving
at a speed of 12m/s?
[tex]▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \huge \mathfrak{Answer}}▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ [/tex]
As we know,
[tex]\boxed{ \boxed{kinetic \: \: energy = \frac{1}{2} mv {}^{2} }}[/tex]
where,
m = mass = 100 kgv = velocity = 12 m/slet's solve for kinetic energy of car :
[tex] \dfrac{1}{2} \times 100 \times 12 \times 12[/tex][tex]100 \times 12 \times 6[/tex][tex]7200 \: \: joules[/tex]what is the most dangerous chemical on the periodic table?
Answer:
Polonium Marked as Po with atomic number 84, is a highly radioactive heavy metal. It is arguably the most lethal known material.
Explanation:
why should a building have better thermal insulation placed in its ceiling than in its walls
Answer:
In a building, heat rises. By putting the insulation in the ceiling heat will rise and get trapped at the top and fill up the entire room. The purpose of insulation is to minimize the transmission of heat within the walls, floors, and ceilings. By minimizing the transmission of heat, you not only keep the room warm but you also lower your electricity and heat bill.
Two metal spheres are suspended on wires so that they hang next to each other, just touching. Sphere X is raised to a certain height and released. Without
friction or air resistance, describe what would happen to Sphere Y.
Answer:A
Explanation:
what do we mean by accretion in the context of planet formation?
which type of thermal energy trnasfer dose a foil wrapping reduce the most
Answer:
Conduction
Explanation:
Hope this helps :)
pls make brainliest :p
PLEASE HELP ASAP(NO LINKS)
Answer:
I think the anwser is (C)
Explanation:
on which temperature scale does the average kinetic energy of molecules double when the temperature doubles?
Answer:
where are the choices i think 100% that is my opinion
A car of mass 800kg travels a distance of 40m at constant speed in a duration of 2.0s. The car exerts a forward force of 15kN.
What is the power generated by the car?
W = F × s
W = 15kN × 40 m
W = 15.000 N × 40 m
W = 600.000 J
P = W/t
P = 600.000 J/2 s
P = 300.000 Watt
P = 300kWatt
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what falling object inspired newton to think about gravity
Legend has it that a young Isaac Newton was sitting under an apple tree when he was bonked on the head by a falling piece of fruit, a 17th-century “aha moment” that prompted him to suddenly come up with his law of gravity.
If a metal has a mass of 78.2 g and a volume of 11.4 mL, what is its density?
Answer:
6.86g/mL
Explanation:
The density of the metal would be approximately 6.859 grams per milliliter (g/mL).
Given that the mass (m) is 78.2 g and the volume (V) is 11.4 mL, we can plug these values into the formula:
Density is a physical property that quantitatively expresses how much mass is contained within a given volume of a substance. In other words, it is a measure of how tightly packed the particles or molecules of a material are. Mathematically, density is defined as the mass of an object (or substance) divided by its volume. It is often denoted by the Greek letter "ρ" (rho).
Density is defined as mass per unit volume. The formula for density is:
Density (ρ) = Mass (m) / Volume (V)
Density (ρ) = 78.2 g / 11.4 mL
Now, let's calculate the density:
Density (ρ) = 6.859 g/mL
So, the density of the metal is approximately 6.859 grams per milliliter (g/mL).
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suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?
We have that with v_1 =v this goes to show that the velocity of the bigger block after the collision takes place is v
From the question we are told
Suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?
Generally the equation for Momentum is mathematically given as
P=mv
Therefore
[tex]m_1v_2=m_2v_2[/tex]
Hence
[tex]v_1=\frac{m_2v_2}{m_1}[/tex]
Therefore
[tex]v_1=\frac{mv_2}{2m}\\\\v_1=\frac{v_2}{2}[/tex]
Hence
[tex]2v+v=v_1+v_2\\\\v_1=v[/tex]
Now
with v_1 =v this goes to show that the velocity of the bigger block after the collision takes place is v
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what makes a force a vector quantity
Answer:
A vector quantity is a quantity that has both magnitude and direction.
Explanation:
Which of the following accurately describes circuits? Question 5 options: A) In a series circuit, the amount of current passing through each part of the circuit may vary. B) In a parallel circuit, the same amount of current flows through each part of the circuit. C) In a series circuit, the current can flow through only one path from start to finish. D) In a parallel circuit, there's only one path for the current to travel.
Answer:
The Answer would be C
In a series circuit , the current can only flow through only one path from start to finisb
How much electrons are in the nucleus of an atom with a atomic number of 20
Answer: There would be 20 electrons.
Explanation: Remember the electrons number is the same as the atomic number.