Elements in which family are most likely to have properties associated with
metals, such as malleability and good conductivity?
Answer: As with all metals, the alkali metals are malleable, ductile, and are good conductors of heat and electricity. The alkali metals are softer than most other metals.
Alkaline earth metals
The alkaline earth elements are metallic elements found in the second group of the periodic table
Explanation:
If the pressure of a gas is increased, then the volume will decrease because the particles of the gas will be forced more closely together.
The independent variable is
.
The dependent variable is
.
Then the independent variable is the pressure of the gas while the dependent variable is the volume of the gas as it depends on the variation in the pressure of the gas.
What is an ideal gas?It is an imaginary gas for which the volume occupies by it is negligible, this gas does not exist in a practical situation and the concept of an ideal gas is only the theoretical one,
A gas's volume will decrease as its pressure rises because the gas's particles will be pressed closer together.
As the volume of the gas depends on the fluctuation in the gas's pressure, the independent variable in this situation is the gas's pressure.
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El profesor de Pedro mencionó en su clase que la distancia promedio de la Tierra a la Luna es de 384 000 000 metros. Ayuda a Pedro a escribir este número en notación científica
Answer:
384 000 000 en notación científica es 3.84*10⁸
Explanation:
La notación científica es una forma de representar números para simplificar la forma en que se escriben. Esta notación se utiliza para poder expresar muy fácilmente números muy grandes o muy pequeños.
Los números se escriben como un producto:
a*10ⁿ
donde:
a es un número real mayor o igual que 1 y menor que 10.n es un número entero, que recibe el nombre de exponente u orden de magnitud. Representa el número de veces que se desplaza la coma. Siempre es un número entero, positivo si se desplaza a la izquierda, negativo si se desplaza a la derecha.Para escribir el número 384 000 000 en notación científica, se realizan los siguientes pasos:
Se mueve la coma decimal hacia la izquierda tantos espacios hasta llegar a la derecha del primer dígito. En este caso la coma se encuentra al final del número.Se escribe entonces este número, que será el coeficiente a en la expresión a*10ⁿ. En este caso es el valor 3.84, donde el punto representa la coma decimal.Se escribe la base 10 con el exponente igual a la cantidad de espacios que se mueve la coma. Este es un número positivo porque la coma se desplaza a la izquierda. Entoces, como la coma decimal se mueve 8 lugares, n=8Entonces, 384 000 000 en notación científica es 3.84*10⁸
3. What is the potential energy of a 8 Newton book sitting on a shelf that is 12 meters high?
Answer:
P = 96 J
Explanation:
Given that,
Weight of the book, W = mg = 8 N
It is placed at a height of 12 m
We need to find the potential energy of the book. The potential energy of an object is given by the formula as follows :
E = mgh
mg = Weight
[tex]E=8\ N\times 12\ m\\E=96\ J[/tex]
So, the potential energy of the book is 96 J.
which of the following can be used to measure mass
Answer:
there are no options
Explanation:
How long would it take a hawk to stop if he was flying at 9m/s and decelerated at 3m/s2?
Answer:
3 seconds
Explanation:
From the question above,
we can apply the first equation of motion which is,
a = (v-u)/t.................... Equation 1
Where a = acceleration. v = final velocity, u = initial velocity, t = time.
make t the subject of the equation
t = (v-u)/a.............. Equation 2
Given: a = -3 m/s²(decelerating), u = 9 m/s, v = 0 m/s (to stop)
substitute these values into equation 2
t = (0-9)/-3
t = -9/-3
t = 3 seconds
Which unit would be most appropriate for measuring the mass of a black bean?
Answer:
milligrams
explanation:
kilograms are too big
Hope this helps :)
An object of mass 2 kg starts from rest and is allowed to slide down a
frictionless incline so that its height changes by 20 m. How fast is the object moving at the bottom of the incline?
a. 10m/s
b. 20m/s
c. 30m/s
d. 40m/s
Answer: B
Explanation:
Given that an object of mass 2 kg starts from rest and is allowed to slide down a frictionless incline so that its height changes by 20 m.
The parameters given from the question are:
Mass M = 2kg
Height h = 20m
Let g = 9.8m/s^2
At the bottom of the incline plane, the object will experience maximum kinetic energy.
From conservative of energy, maximum K.K.E = maximum P.E
Maximum P.E = mgh
Maximum P.E = 2 × 9.8 × 20 = 392 J
But
K.E = 1/2mv^2
Substitute the values of energy and mass into the formula
392 = 1/2 × 2 × V^2
V^2 = 392
V = sqrt( 392 )
V = 19.8 m/s
V = 20 m/s approximately
Cutting a log of wood into pieces is a____________________ change
Answer:
physical change
Explanation:
Physical change are changes affecting the form of a chemical substance, but not its chemical composition. Examples of physical change: melting, freezing, shape, size, color...
Answer:
It is physical change
Explanation
Because it didn't change the substances
After the wood is being cut into pieces it cant still be called wood
PLS HELP THIS IS DUE IN 10 MINUTES Describe at least 3 uses of ultraviolet radiation and discuss whether the benefits outwheigh the risk.
Answer:
Three uses that ultraviolet radiation is used for is for cleaning tools like for doctors or dentists, suntanning, and photo therapy. This can be okay and worth the risk if used carefully and with protection. Otherwise, it can cause cancer or blindness
Explanation:
calculate the pressure if a force of 2n is applied on an area of 2mm²
Answer:
P=1 MPa
Explanation:
P=F/A
P=2N/2mm^2
P=1N/mm^2
P=1 MPa
[tex]\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}[/tex]
[tex]\\ \sf\longmapsto Pressure=\dfrac{2}{0.000002}[/tex]
[tex]\\ \sf\longmapsto Pressure=1000000Pa[/tex]
which was an idea use to distribute the theory of plate tectonics
Answer:
continental drift
Explanation:
Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines look like they fit together like a puzzle
convert 10095 mm to pm
Answer:
1.01 × 1013 picometres
Explanation:
multiply the length value by 1e+9
The "Tragedy of the Commons" describes the conflict between a. Developing and developed nations. b. Individuals and society. c. Farmers and industrialized society. d. Canada and Mexico.
When neither plate is dense enough to sink into the asthenosphere, the result is a _____ plate boundary.
Answer: Convergent collision
When neither plate is dense enough to sink into the asthenosphere, the result is a Convergent (Colliding) plate boundary
In asthenosphere, when plates move towards each other and collide, it is called Convergent Colliding.
When Oceanic lithosphere moves away from the rising thermal currents at divergent plate boundaries it get crust and cools at the boundaries..
As Oceanic lithosphere cools, the density of the rigid plate increases.
At some plate margins, Oceanic cooler plate became more dense and hot s compared to asthenosphere plate, the plate is sinking beneath the adjacent plate and back into the hotter, deeper regions. This is called subduction. Subduction occurs along convergent plate margins.
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Rain drops fall on a tile surface at a density of 4638 drops/ft2. There are 17 tiles/ft2. How many drops fall on each tile? Answer in units of drops/tile
Answer: 272.82 drop/tile
Explanation:
Given that the Rain drops fall on a tile surface at a density of 4638 drops/ft2. There are 17 tiles/ft2. How many drops fall on each tile?
Tiles/ft^2 × drop/tiles = drop/ft^2
Tiles will cancel out. Leaving the answer to be drop/ ft^2
Substitutes all the magnitude of the above units.
17 × drop/tiles = 4638
Make drop/tiles the subject of formula
Drop/tiles = 4638/17
Drop/tiles = 272.82
Therefore, 272.82 drop/tile drops fall on each tile?
Distinguish between an energy transfer and an energy transformation in the following situation: A heat lamp warms a baby zebra.
Answer: Thermal energy: transfer from the air to the lamp to the zebra.
Energy transformation: The lamp converts electric energy to thermal energy.
Imagine a zoo warming a baby zebra with a heat bulb. The heat lamp's circuitry converts electrical energy into thermal energy. Additionally, energy is exchanged as an object moves from one to another. Energy does not need to change form when it is transported.
What is energy transfer and an energy transformation?The passage of energy from one place to another is known as energy transfer.
When energy transforms, it goes from one type to another. Although energy can be changed or moved, the overall amount always stays the same.
There are three main ways that energy can be transferred: as heat, as sound, and as light.
The light bulb is a prime example of energy being transmitted as light. Alarm clocks are examples of energy transfer by sound, and heating a stove is an example of energy transfer through heat.
Therefore, when it is transmitted, energy doesn't need to change its form.
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Use the formula to solve for the variable of d
v=d/t
A. d = v/t
B. d = vd
C. d = vt
D. d = t/v
a is correct
Explanation:
beacuse d is directly proportional bto velocity and the time taken
Answer:
C. d=vt
Explanation:
We are given this formula:
[tex]v=\frac{d}{t}[/tex]
and asked to solve for the variable d.
In order to solve for d, we must isolate it on one side of the equation.
d is being divided by t. The inverse of division is multiplication. Multiply both sides of the equation by t.
[tex]t*v=\frac{d}{t} *t[/tex]
[tex]t*v=d[/tex]
[tex]tv=d[/tex]
[tex]d=tv[/tex]
Due to the commutative property of multiplication, we can switch the v and the t.
[tex]d=vt[/tex]
The formula solved for d is d=vt and C is the correct answer.
A car is going 43m/s and travels 14 m, how
long did it take?
Answer:
Time = 0.3256 sec
Explanation:
Velocity = displacement / time
43=14/t
So the time =14/43
t=0.3256 sec
Which of the following is true of the Celsius scale? a. 212 degrees is the boiling point of water. b. 0 degrees is absolute zero. c. 0 degrees is the freezing point of water. d. 32 degrees is the freezing point of water. Please select the best answer from the choices provided A B C D
Answer:
it is C on NCCA Quiz
Explanation:
Answer:
The correct answer is C., or ¨0 degrees is the freezing point of water¨.
The potential energy of a pear is 5.0 joules. The pear is 4 m high. What is the mass of the apple?
Answer:
rrteertewtagtewyewtyewtewy
Explanation:
Asking why and how about various things in life is a way to develop which life skill?
Answer:
Learning skills
Explanation:
Remember, life skills refer to essential mental and physical abilities needed by a person to successfully face challenges of everyday life.
Therefore, an individual who inquires why and how about the various things in life is developing his learning skill, thereby also increasing his critical thinking abilities.
A 2-column table with 4 rows. The first column titled mineral has entries diamond, cubic zirconia, common glass, ruby. The second column titled density and grams per cubic centimeter has entries 3.50 to 3.55, 5.50 to 5.90, 2.40 to 2.80, 3.90 to 4.10. If a rock sample has a mass of 1.17 g and a volume of 0.33 cm3, what type of rock is it? If a rock sample has a mass of 2.7 g and a volume of 1.1 cm3, what type of rock is it? If a rock sample has a mass of 11.2 g and a volume of 1.9 cm3, what type of rock is it?
Explanation:
1. diamond
2.common glass
3. cubic zirconia
Answer:
1.diamond
2. common glass
3. cubic zirconia
Explanation:
just did it!!
if a bicyclist, with initial velocity of zero, steadily gain speed until reaching a final velocity of 26m/s, how far away did she travel during the race (in the same amount of time?
Answer:
34.46mExplanation:
Using one of the equation of motion to solve the question. According to the equation v² =u²+2as where;
v is the final velocity of the bicyclist = 26m/s
u is the initial velocity of the bicyclist = 0m/s
a is the acceleration due to gravity = 9.81m/s
s is the distance covered during travel
Substitute the given parameters into the formula above to get the distance traveled
26² = 0² + 2(9.81)s
676 = 19.62s
Divide both sides by 19.62
676/19.62 = 19.62s/19.62
s = 34.46m
The distance traveled by the bicyclist during the race is 34.46m
What are some questions engineers should ask when researching a problem?
Who will this help?
How long will it take to get it right?
What a materials can be used to solve the problem?
How much will the project cost?
Answer:
is this a check all that apply or a single answer?
How is sound produced in our throat
If Julie applies 2.67 Newtons of force down onto the table, how
many pounds of force is she applying? Llbs (Write your
answer two significant figures)
Answer:
0.6 pound.
Explanation:
From the question given above:
Julie applies 2.67 Newton (N) of force down onto the table.
Hence, we can obtain the force in pound applied by Julie on the table as follow:
Recall:
1 N = 0.225 pound
Therefore,
2.67 N = 2.67 × 0.225
2.67 N = 0.6 pound
Therefore, the force in pound applied by Julie on the table is 0.6 pound
A water holding tank measures 85 m long, 55 m wide, and 9 m deep. Traces of mercury have been found in the tank, with a concen- tration of 65 mg/L.
What is the total mass of mercury in the tank?
Answer in units of kg.
Answer:
Mass = 2734.875 kg
Explanation:
Given that A water holding tank measures 85 m long, 55 m wide, and 9 m deep.
The volume = 85 × 55 × 9 =
= 42075 m^3
Traces of mercury have been found in the tank, with a concen- tration of 65 mg/L.
1 m^3 = 1000 L
Convert cubic meters to litres.
42075 × 1000 = 42075000 L
From definition of density,
Density = mass ÷ volume.
Substitute the given density and the calculated density into the formula
65 = mass ÷ 42075000
Cross multiply
Mass = 65 × 42075000
Mass = 2734875000 mg
Convert mg to kg
To do that, you will divide the answer by 1000000
2734875000 ÷ 1000000
= 2734.875 kg
Convert 2.5 feet into inches. (1 ft = 12 in)
Answer: 30 inches
Explanation: 12x2.5=30
Answer:
Explanation:
1 feet = 12 inch
2.5 feet = 2.5 × 12
= 30 inch
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