Answer:true
Explanation:
1 a rectangular block of steel measures 4cm * 2cm* 1.5cm. its mass is 93 .6g
a) calculate the density of steel
b)steel is made up of almost entirely of atoms butt is denser than iron
suggest a reason for this
a) density = 93.6g/12cm³
= 7.8g/cm³
b) The reason is alloying
Explanation:
volume of the rectangular block = l× b × h
= (4 × 2 × 1.5)cm
= 12 cm³
density = mass/ volume
mass = 93.6g
volume = 12cm³
therefore,
density = 93.6g/12cm³
= 7.8g/cm³
b) °Steel is formed when alloying Iron with carbon.
°Alloying improves the physical properties of the metals and non-metals
How many hours would it take a plane to fly 1,500 miles if it was moving at a constant speed of 400 miles/hour.
It would take 3 hours and 45 minutes, for a plane to fly 1,500 miles if it was moving at a constant speed of 400 miles/hour.
Calculation
Round off 3.75 to the nearest one to give the hour value i.e., 3.The minutes are obtained by multiplying the fractional portion of the decimal value by 60, or 0.75 x 60 = 45.we have 3 hours and 45 minutes.What is speed?The distance traveled in a unit of time is called speed. It refers to a thing's rate of movement.This scalar quantity known as speed is the velocity vector's magnitude, It has no clear direction.A faster rate of movement is indicated by a higher speed. It is travelling more slowly if the speed is lower. It has zero speed if it isn't moving at all.The formula: can be used to determine the constant velocity of an object traveling straight forward.r = d / twhere,
r stands for rate or speed (sometimes denoted as v, for velocity)
d is the traveled distance.
t is the amount of time needed to finish the movement.
The average speed of an object over a period of time is given by this equation. We can see the object's average speed here, however at some moments over the time frame, it may have been moving faster or slower.As the time interval gets closer to zero, the maximum average speed is reached. The speed at that moment is what you see when you look at a speedometer in an automobile. While you may have briefly reached a speed of 60 mph, your average speed over the course of 10 minutes could have been much higher or much lower.M/s is the SI unit of speed (meters per second). Miles per hour or kilometers per hour are the most widely used units of speed in everyday life. A typical speed at sea is in knots, or nautical miles per hour.To learn more about speed, refer to https://brainly.com/question/24739297
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For every ______
there is an equal and opposite ______.
a. interaction & action b. action & reaction
c. action & interaction
It's Action and Reaction
How much energy must be absorbed by water with a mass of 0.5 kg in order to raise the temperature from 30°c to 65°C?
Water has a specific heat of 4,190 j/kg°C
Answer:
Q = 67.04 [J]
Explanation:
In order to solve this problem, we must use the following equation of thermal energy, which relates mass to specific heat and temperature change.
[tex]Q = m*c_{p}*(T_{2} -T_{1})[/tex]
where:
Q = thermal energy [J]
m = mass = 0.5 [kg]
Cp = specific heat = 4,190 [J/kg°C]
T2 = final temperature = 65 [C]
T1 = initial temperature = 30 [C]
Now replacing:
Q = 0.5*4.190*(65 - 30)
Q = 67.04 [J]
A 0.142 kg baseball on a 0.8 meter table has 1.11 J of potential energy. It falls. How much kinetic
energy, in Joules, will it have on the way down when it reaches a height of 0.25 meters? Assume
mechanical energy is conserved.
Answer:
0.04544 J
Explanation:
KE= 1/2 the mass times V squared
KE=1/2(0.142) * (0.8)^2
KE= 0.071 * 0.64
KE=0.04544
Help Plsss
Which of the following objects are subject to the law of universal gravitation? (circle all that apply)
a. Satellites
b. Water
c. Frogs
d. Stars
What makes an electric charge?
Answer:
Most electric charge is carried by the electrons and protons within an atom. Conversely, two protons repel each other, as do two electrons. Advertisement. Protons and electrons create electric fields, which exert a force called the Coulomb force, which radiates outward in all directions.
HELP PLEASE!!! is this right? if not please tell me the right answer
write the equation for calculating relative velocity in one dimensional.
Answer:
Your answer is correct, Option B
Which example is of researcher bias in interpreting data?
A scientist wishes to determine the area of an ice sheet. To do so, he relies on spectrographic images sent by satellite.
A health official investigates the spread of HIV in her city. She takes a census of the HIV status of every adult resident.
A geologist wants to determine whether the water level of an aquifer is declining. To find the answer, he digs a well.
A researcher seeks to prove that babies smile at two months old. She counts some confused expressions as smiles.
Answer:
A researcher seeks to prove that babies smile at two months old. She counts some confused expressions as smiles.
Explanation:
This is the answer because its not actual date due to the fact she's using her opinion to decided whether or not the expression a baby is making is a smile, whereas the other answers had factual data involved.
story on where there is a will there's a way
Which term describes the rate at which charge passes a point in a circuit?
O A. Voltage
O B. Power
O C. Resistance
O D. Current
Answer: D
The word that describes the rate is electric current. It is usually measured in amperes.
Amperes = Coulomb.
Hope it helps!
An object is thrown downward from the top of a 175 meter building with an initial speed of 10m/s
Answer:
Explanation:
we can look for the final velocity of the object using the eqaution of motion as shown:
v² = u²+2gH
v is the final velocity
u is the initial velocity = 10m/s
g is the acceleration due to gravity = 9.81m/s²
H is the height of the object = 175m
Subxtitute the given parameters inti the formula and get v:
v² = 10²+2(9.81)(175)
v² = 100+3433.5
v² = 3533.5
v = √3533.5
v = 59.44m/s
Hence the final velocity of the object is 59.44m/s
A child’s toy arrow is launched horizontally from a bow at a speed of 8 m/s from a second story window 4 meters above the ground, and the sticks in a pile of sand.
A. How far away is the pile of sand?
B. What were the horizontal and vertical speeds of the arrow when it hits the sand?
C. What angle does the arrow make with the ground when it sticks in the sand?
Which type of thermal energy transfer does a foil wrapping reduce the most? O A. Conduction O B. Translation O C. Radiation O D. Convection
The foil reduces radiation the most in terms of thermal energy transfer. Thermal energy transfer is the movement of heat from one place to another. The four types of thermal energy transfer are radiation, conduction, convection, and advection. The correct answer is option OC.
Foil wrapping reduces radiation as the most type of thermal energy transfer. Thermal energy transfer is the movement of energy from one place to another. There are four types of thermal energy transfer: conduction, convection, radiation, and advection. The foil wrapping reduces radiation the most. When there is a foil wrapped around food, the foil traps the heat inside the food, which reduces the radiation energy transfer. Radiation is the heat transfer that occurs in the form of electromagnetic waves. It requires no matter to move, which is why it can occur in the vacuum of space. Radiation transfer can be absorbed, transmitted, or reflected. Therefore, the correct answer is option OC.For more questions on radiation
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Waves that make up the visible part of the electromagnetic spectrum have
Answer:
the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV
Explanation:
the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV
PLEASE HELP
What is an archimedean screw used for?
dont just guess or i wil banned you and reprt you actually try
Archimedes screw, machine for raising water, allegedly invented by the ancient Greek scientist Archimedes for removing water from the hold of a large ship.
Answer:
To move things from a lower level to a higher level.
Explanation:
100 kg = how many pounds
Answer:
220.462 pounds exact but you can round to 220 pounds
Explanation:
A car starts from rest down a straight, flat road and gets up to 22 m/s after 33 seconds.
a) Find acceleration.
b) How far did it go during this time?
Answer:
Explanation:
Acceleration = distance / time
= 22 / 33 = 2/3
If a person pulls a cart to the right at 5N of force and another person pulls to the left with a 15N of force? What is the net force and it what direction
Answer:
The net force is 10 [N] acting to the left
Explanation:
To solve this type of problem we must make a sum of the forces acting on the cart, since the forces are vectors, we know that vectors can be added, In this way forces that go in the same direction are added and forces in opposite directions are subtracted.
FL = force to the left = - 15 [N]
FR = force to the right = 5 [N]
FT = Resultant force [N]
- 15 + 5 = FT
FT = - 10 [N]
The negative sign tells us that the force acts to the left.
HELP PLEASE!
write the equation for calculating relative velocity in one dimensional.
Anwer:
Key Equations
Position Vector: `n r (t) = (t)^j+y
Total acceleration: `n a = `n aC
+ `n aT
Position Vector in frame S is the position Vector in frame S` plus the vector from the origin of S to the origin of S`: `n rPS = `n rPS`
+ `n rS`S
Relative velocity equation connecting two references frame: `n vPS = `n vPS`
+ `n vS`S
Mark has a ball. He tosses it into the air. In 3.7 seconds, it falls to the ground. Why did this happen to Mark's ball? Explain.
Mark's ball falls to the ground because there is a gravitational pull from Earth's core. There are chemicals and elements in the Earth that make this pull. Mark's ball does not stay in the air for this reason.
Hope this helps you!
Answer:
This happened because there is a gravitational pull.
Explanation:
The density of water is 1.00 g/cm3. The density of ethanol is 0.80 g/cm3. What is the volume of ethanol, in cm3 that has the same mass as 100 cm3 of water?
Explanation:
Given that,
The density of water is 1 g/cm³
The density of ethanol is 0.8 g/cm³
We need to find the volume of the ethanol that has the same mass as 100 cm³ of water.
Density=mass/volume
For water,
[tex]d=\dfrac{m}{V}\\\\m=dV\\\\m=1\ g/cm^3\times 100\ cm^3\\\\m=100\ g[/tex]
For ethanol,
[tex]d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{100\ g}{0.8\ g/cm^3}\\\\V=125\ cm^3[/tex]
Hence, 125 cm³ of ethanol has the same mass as 100 cm³ of water.
Answer:
1.00 g/cm3
Explanation:
Someone please help me!!!
Answer:
i don’t understand
Explanation:
Answer:
There's no question-
What is the weight of a 4.5 kg mass on Earth?
Answer:
7.535×10^25 earth mass
Explanation:
for an approximate result,divide the mass value by 9.223e+18
what happens to a circuits resistance, voltage, and current when you increase the diameter of the wire in the circuit?
The resistance increases as the diameter of the wire increases. Also, the voltage is constant and the current increases.
Resistance of a wireThe term resistance refers to the opposition offered to the flow of current by circuit elements. The resistance of a wire depends on its;
lengthCross-sectional areaNow, the diameter of the wire determines its cross sectional area. The resistance increases as the diameter of the wire increases. The voltage is constant and the current increases since voltage and current are directly proportional to each other. The correct answer therefore is option A.
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Answer:
the answer is
R increases,
V is constant,
I increases.
Explanation:
just did it on apex
Lisa has a mass of 52 kilograms. How much does Lisa weigh in Newtons? How much does she weigh in pounds? (Use g = 9.8 m/s)
Answer: 510 in Newton’s and 115 lbs
Explanation:
Considering the definition of weigh, Lisa weighs 0.5096 N or 0.1146 pounds.
Mass is the amount of matter that a body contains, while weight is the action exerted by the force of gravity on the body. That is, weight is a measure of how much force gravity exerts on the mass of an object.
The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
Weight can be calculated as the product of mass and acceleration due to gravity:
W=m×g
In this case, you know:
m= 52 g= 0.052 kg (being 1000 g=1 kg)g=9.8 m/s²Replacing in the definition of weigh:
W=0.052 kg×9.8 m/s²
Solving:
W= 0.5096 N
1 newton equals 0.2248 pound. Then W=0.5096 N= 0.1146 Pounds
Finally, Lisa weighs 0.5096 N or 0.1146 pounds.
Learn more:
https://brainly.com/question/24906415True or False? Mechanical waves do NOT need a medium to travel through.
Answer:
True
Explanation:
Mechanical waves require a medium in order to transport their energy from one location to another.
How long does a dream typically last near the end of the sleep cycle, just before waking?
A.
about 5 minutes
B.
about 15 minutes
C.
about 30 minutes
D.
about 50 minutes
pleaseeeee hurryy
Answer:
C) about 30 minutes
Explanation:
edge 2023
Which is a vector quantity?
A distance
B. time
C.mass
D.velocity
Can anyone help,please?
Answer:
D. Velocity
Explanation:
Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude. Although a vector has magnitude and direction, it does not have position.
Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction.
Which is a true statement about a series circuit?
A.) Every part of the circuit is positively charged.
B.) The current flow through every part of the circuit is the same.
C.) The current through the circuit can take several paths.
D.) Every part of the circuit is negatively charged.
Please help, I'm on a time limit!
the answer is B your welcome
The true statement about a series circuit is: the current flow through every part of the circuit is the same. Hence, option (B) is correct.
What are series and parallel circuit?Electrical networks and two-terminal components can be linked either serially or parallelly. The electrical network that results will have two terminals and be capable of operating in either a series or parallel topology.
It depends on your point of view whether a two-terminal "thing" is an electrical network (like resistors connected in series) or an electrical component (like a resistor). In this article, a two-terminal "thing" that participates in series/parallel networks will be referred to as a "component."
Each component connected in series travels the same "electrical path" and carries the same amount of current—equal to the network's current—through it.
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