True or False. Where an element is located on the periodic table can help predict some of its properties.
Kristin is going 90 mph. Kristin is 20 miles behind a truck that is driving 50 miles per hour. How long will it take her to catch up to the truck? How far will she go in that time? Time to catch up to truck:
Distance traveled in that time:
Answer:
She will go 50t miles, = 1000/(r-50) miles.
Explanation:
Depends oh her speed. If she goes r mi/hr, it will take t = 20/(r-50) hours to catch up. She will go 50t miles, = 1000/(r-50) miles.
PLEASE HELP
8th grade honors science
Both of them are magnets coiled by wires.
1. The wire coiled in the first diagram, the wire is having current, Making the magnetic feild of the magnet more........
2. The wire coiling the magnet is here not having electric current making the magnetic feild smaller
6. What makes an electromagnet stronger than a solenoid?
7. Identify the four ways you can increase the strength of an electromagnet.
1.
2.
3.
4.
Explanation:
Increase the Voltage: Ohm's Law tells you that current is proportional to voltage, so if you're running your electromagnet on a 6-volt battery, switch to a 12-volt one. You can't keep increasing voltage indefinitely, however, because wire resistance increases with temperature until a limiting current is achieved. That brings you to the next option.
Lower the Wire Gauge: Wire resistance decreases with increasing cross-sectional area, so reduce the wire gauge. Keep in mind that reducing the gauge is synonymous with increasing the wire thickness. If you've wrapped your solenoid with 16-gauge wire, replace it with 14-gauge, and the magnet will be stronger.
Lower the Temperature: Resistance increases with temperature, so if you can maintain your magnet at below-freezing temperatures, it will be stronger than one at room temperature, although the difference probably won't be much. At extremely low temperatures, however, resistance almost disappears and the wires become super-conducting. This fact allows scientists to design uber-powerful magnets, such as the ones at CERN.
Use Wire with High Conductivity: You can also increase current by upgrading to a wire with a higher conductivity. Copper wire is probably the most conductive wire you can use, but silver wire is even more conductive. Switch to silver wire, if you can afford it, and you'll have a stronger magnet.
Ellen does an experiment by releasing a ball from a height of 1 m above each floor in a tall building. She records the time it takes the ball to reach the floor.
Which question is Ellen most likely investigating?
How does distance affect the gravitational force on objects?
How does distance affect the electromagnetic force on objects?
Does height affect the strong force acting on a moving ball?
Does height affect the weak force acting on a moving ball?
Answer:
The question that Ellen most likely investigating is "How does distance affect the gravitational force on objects?"
Explanation:
Please Help Best and Right answer will mark brainliest!!
Answer:
Explanation:
I am sorry but I am not able to see the question
Answer:
whats the question
Explanation:
?????????????
The length of lines 1, 2, and 3 is the same. Each line has the same number of dots, so your finger moved along each line in the same amount of time. One measurement of motion is average speed:
average speed = total distance ÷ total time
Would the average speed of your finger be the same or different for the three lines?
Answer:
The times would be the same for all the lines.
Explanation:
The question says that 1,2, and 3 are all the same length, have the same number of dots, and you moved your finger in the same amount for each line. Since the total distance and the total time are the same, the average speed will also be the same.
I NEED THIS A.S.A.P I WILL GIVE BRAINLIEST PLEASE HELP!!
Please use the G.U.E.S.S method to solve this problem with the work shown.
1. What is the density of a gas if 0.5g occupies a volume of 100mL?
Explanation:
change 0.5 g to kg so 0.005kg then change 100 ml to m so 0.001m so density=mass over volume so from there you can continue
Please Help with this ASAP:
A wave vibrates 45 times in 30 seconds, calculate its frequency
Factors that limit a technological design are called ____________.
help. i will give a heart and 10pts
Answer:
A constraint
Explanation:
What is the velocity of a wave with a wavelength of 2m and a frequency of 7.2Hz?
NEED HELP FAST!
select drop box.
questions and options are in pictures.
Answer:
First is incrcersing mangnetic field second photosphere
Explanation:
sorry if the first one is wrong
Can someone please help me!!!!!!
Solve x3 = 64 over 27.
1. ±8 over 3
2. 8 over 3
3. ±4 over 3
4. 4 over 3
what is the meaning of oxidation
Answer:
the loss of electrons
Explanation:
.
What would be the kinetic energy of a 2 kg bowling ball moving 2m/s? KE = 1/2 mass x velocity x velocity
8 J
4 J
2 J
Two sites on the same river have been surveyed as a place to build a dam. The dam will be part of a hydroelectric power plant. Site A is at the top of a 50-meter waterfall. Site B is at the top of a 35-meter waterfall. Which answer correctly describes where the water will have the greater gravitational potential energy to be converted into electricity?
A. Site A
B. Neither site has gravitational potential energy to convert to electricity.
C. Both sites will produce the same amount of electricity as the water flows over the water fall.
D. At both sites the water has the same gravitational potential energy.
Answer:
Site A
Explanation:
because it is in a higher position making the water that falls stronger.
A student is taking an animal science and an astronomy class. In animal sciences, she learns that pumas are called mountain lions and cougars in different parts of the world, but they are all the same cat. She makes an analogy, or comparison, to something she learned in her astronomy class. She says that a certain space object is like a puma because it is the same object but has different names depending on where it is. What space object is she thinking of?
comet
meteoroid
asteroid
meteoride
Answer: meteoroid
Explanation: a meteoroid becomes a meteor when it enters earths atmosphere
Answer:
meteoroid
Explanation:
Which is the process by which a solid changes to a liquid?
condensation
evaporation
melting
sublimation
Answer:
melting
Explanation:
What units are used to measure mass and weight? Mass and weight are measured in kilograms. Mass and weight are measured in newtons. Mass is measured in kilograms, and weight is measured in newtons. Mass is measured in newtons, and weight is measured in kilograms.
Mass can be measured in kilograms and other units of mass, but not in Newtons.Weight can be measured in Newtons and other units of force, but not in kilograms.
What is mass?In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. The change caused by an applied force is smaller the more mass a body has.
Weight of the body is mass times of gravity that is relative quantity changes with acceleration due to gravity. Mass is absolute quantity it is measured in Kg while weight is force so measured in Newton.
Mass can be measured in kilograms and other units of mass, but not in Newtons.Weight can be measured in Newtons and other units of force, but not in kilograms.
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A scientist uses an instrument to observe the pattern of molecules in a substance. The picture below shows what the scientist sees.
please help....
View the image and answer the question.
Identify the concept that the angle above represents and explain what it means in your own words.
Answer:
its a compass rose or a temperature that tells how is it hot or cold or it is to u where to go when needed like a map.And the angles is 6
Explanation:
PLEASE HELP THIS IS DUE TODAY!! (GIVING BRAINLIEST TO WHOEVERY ANSWERS QUICKLY AND CORRECTLY!) 15 POINTS!
List the life cycle path of a high mass star
________→ ________ → ______________→ ___________→ ________→ _______→ or _______________
As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf. ... Like low-mass stars, high-mass stars are born in nebulae and evolve and live in the Main Sequence
hydrogen shell burning - outer layers swell. Red Giant Branch - helium ash core compresses - increased hydrogen shell burning. First Dredge Up - expanding atmosphere cools star - stirs carbon, nitrogen and oxygen upward - star heats up.
Question for the day!
Answer this you get 15 points.
Match the term with the definition.
Match these with the a, b, c, and d answers.
1.
Liquid
2.
Solid
3.
Gas
4.
Plasma
Match these with 1, 2, 3, and 4 questions.
a.
particles that slide past one another
b.
an ionized gas of positively and negatively charged particles
c.
particles packed closely together that vibrate in place
d.
particles spread far apart that move around freely.
1. a
2c
3b
Explanation:
in solid partickles are packed in liquid they are a little further qnd in gas they are seperated
Which statement is an example of a law?
1. Objects tend to resist changes in motion.
2. A car’s speed decreases when the brake is applied.
3. Characteristics are passed from parents to children through DNA.
4. If I add more carbon dioxide to this biosphere, then temperatures will increase.
Answer:
Option 2 is an example of a law
The chart shows masses and velocities of four objects.
A 3-column table with 4 rows titled Motion of 4 Objects. The first column labeled Object has entries W, X, Y, Z. The second column labeled Mass (kilograms) has entries 12, 15, 18, 28. The third column labeled Velocity (meters per second) has entries 5, 8, 2, 10.
Which lists the objects in order, from least to greatest momentum?
W, X, Y, Z
Z, Y, X, W
Z, X, W, Y
Y, W, X, Z
Answer:
Y, W, X, Z
Explanation:
Y-18*2=36
W-12*5=60
X-15*8=120
Z-28*10=280
Least to greatest momentum are
Y, W, X, Z.
Y=18*2=36
W=12*5=60
X=15*8=120
Z=28*10=280
What is momentum ?"Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity i.e., it has both magnitude and direction."
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A student sorted mineral samples into two groups: dull and shiny. Which of the following properties did the student use to sort the mineral samples into groups? a
streak
b
luster
c
cleavage
d
color free brainliest
B: Luster
This is about physical properties used in classification of minerals.
The four basic properties used to identify minerals from the ground are;
1) Luster; this is a property which shows how well the reflection occurs when a mineral is exposed to light.
2)color; different minerals have different colors and this is a good property to identify minerals.
3) diaphaneity; this is defined as the ability of a mineral to have light transmitted through it.
4) shape: this is also a good property to identify minerals.
There are other properties used to identify minerals like streak which is the colour of the powdered form of a mineral, hardness, fracture e.t.c.
Now,we want to classify the mineral samples as either dull or shiny. For a mineral to be dull, it means it will not be able to reflect light properly whereas if it is shiny, light will easily be reflected from it.
The only property of minerals in the options that corresponds with shiny or dull is the Luster property.
Thus, option B is correct.
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How does muscle fatigue affect the amount of work that muscles can do?
Answer:
by straining that muscle it can slow down the amount of muscle your supposed to get
Explanation:
Answer:
Muscle fatigue is a symptom that decreases your muscles' ability to perform over time. It can be associated with a state of exhaustion, often following strenuous activity or exercise. When you experience fatigue, the force behind your muscles' movements decrease, causing you to feel weaker.
Explanation:
A rectangular block of copper metal has a mass of 100 g. The dimensions of the block are 2 cm by 2 cm by 2 cm. From this data, what is the density of copper?
As a candle burns on the table, you can see the electromagnetic energy and feel the thermal energy released. Which two statements are true about the energy involved in burning the candle?
A. Chemical energy is created from electromagnetic energy when the candle burns.
B. The total amount of all types of energy is conserved when the candle burns.
C. Thermal and chemical energy are destroyed by the electromagnetic energy when the candle burns.
D. The total chemical energy equals the electromagnetic and thermal energy released when the candle burns.
please help!!!
Answer:
The answer is B
Explanation:
Answer:
A,C and D
Explanation:
In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?
1:Li2CO3 → LiO + CO2
2:Zn + 2HCl → H2 + ZnCl2
3:CO2 + H2O → CH2OH + O2
4:CH4 + O2 → CO2 + 2H2O
