Explanation:
B I think it is because it has 48 gm than A
the processes used to gain knowledge are called ____ development
Which substance is a gas at room temperature and atmospheric pressure?
A. Hg
B. CH
C. C2H5OH
D. H20
Answer:
Explanation:
A) Hg is mercury, a metal that is mostly liquid at STP (Standard Temp and Pressure), though some small portion of it will be gaseous in a closed container.
B) CH Methylidyne radical is a gas
It is not a stable compound because carbon has four valence electrons and only one of those is kept occupied by the hydrogen atom.
If this is supposed to be CH₄ which is methane, then also a gas at STP
C) C₂H₅OH is ethanol which is mostly a liquid at STP, though some small portion of it will be gaseous in a closed container.
D) H₂O is water and will be mostly liquid at STP, though some small portion of it will be gaseous in a closed container.
CH₄ methane is the substance that is a gas a room temperature and atmospheric pressure, therefor the correct answer is option B.
What is the matter?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
Hg is liquid at room temperature
CH₄ methane is gas at room temperature
C2H5OH is liquid at room temperature
H20 is liquid at room temperature
CH₄ methane is the substance that is a gas a room temperature and atmospheric pressure, therefor the correct answer is option B.
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Your question seems incomplete the complete question should be ,
Which substance is a gas at room temperature and atmospheric pressure?
A. Hg
B. CH₄
C. C2H5OH
D. H20
Nate throws a ball straight up to Kayla, who is standing on a balcony 3.8m above Nate. When she catches it, the ball is still moving forward at a speed of 2.8m/s. With what initial speed did Nate throw the ball?
Answer:
2.8s
Explanation:
because from the presure
A thin uniform bar has a moment of inertia II about an axis perpendicular to it through its center. If both the mass and length of this bar are doubled, its moment of inertia about the same axis will be:_____.
A. 2I.
B. 4I.
C. 8I.
D. 16I.
E. I/16.
Answer:
C. 8I.
Explanation:
As moment of inertia for a bar is proportional to the product of its mass and the square of its length, doubling the mass will double the moment of inertia. Doubling the length will quadruple the moment of inertia. Doing both will make the moment of inertia 2(4) = 8 times larger
2. Justin raees his Chevy S-10 down the highway for 30 seconds and travels 2560
meters. What was his average speed?
1 km = 1000 meters
2,560 meters / 1000 = 2.56 km
30 seconds is 1/2 minute
2.56 km x 2 = 5.12 km per minute
1 hour = 60 minutes
5.12 x 60 = 307.2 km per hour
Answer: 307.2 km per hour
which of the following are not vector directions?
A. 35 degrees north of east
B. North
C.Outside 45 degrees
D. 35 degrees inside
Answer:
Hello! Your answer is BELOW.
Explanation:
Outside 45 degrees
35 degrees inside
Hope I helped Hope you make an 100%
-Amelia♥
Which of the following must an engineer take into account when designing a roller coaster?
A.the mass of the roller coaster
B. The rates at which the roller coaster will change directions
C. the total mass of the people that will ride the roller coaster
D. the acceleration of the roller coaster due to gravity
Answer:
The correct answer would be A
.Write the meaning of following words:
a) gale
b) billows
c) raging
d) evil
Answer:
a strong wind.
showing rage.
a large undulating mass of something, typically cloud, smoke, or steam.
profoundly immoral and wicked.
Explanation:
please mark me brainliest pleaseDescribe three ways that adults continue to guide children's emotions during the school-age
years.
In a typical greyhound race, a dog accelerates to a speed of 20 m/s over a distance of 30 m. It then maintains this speed up to 80 m and slowed down to stop at 100 m.a) What would be a greyhound's acceleration between 0 m to 30 m, 30 m to 80 m and 80 m to 100 m?b) What would be the time taken for the entire trip?
For the typical greyhound race we have that:
a) The acceleration of the dog for each section is:
Between 0 m to 30 m = 6.67 m/s²Between 30 m to 80 m = 0 m/s²Between 80 m to 100 m = -10 m/s²b) The time taken for the entire trip is 7.5 s.
a) Let's calculate the greyhound's acceleration for each section:
Between 0 m to 30 m[tex] a = \frac{v_{f}^{2} - v_{0}^{2}}{2\Delta d} [/tex] (1)
Where:
a: is the acceleration =?
[tex]v_{f}[/tex]: is the final velocity = 20 m/s
[tex]v_{0}[/tex]: is the initial velocity = 0 (the dog starts from rest)
Δd: is the change in distance = 30 m - 0 m = 30 m
Then, the acceleration is:
[tex] a = \frac{v_{f}^{2} - v_{0}^{2}}{2d} = \frac{(20 m/s)^{2}}{2*30 m} = 6.67 m/s^{2} [/tex]
Between 30 m to 80 mSince the dog maintains a velocity of 20 m/s up to 80 m, the acceleration is zero. The initial and final velocity is the same, so the acceleration in eq (1) is 0.
Between 80 m to 100 mIn this stage, the dog slowed down to stop at 100 m. This means that the final speed is 0.
We have:
[tex]v_{f}[/tex] = 0 (the dog stops)
[tex]v_{0}[/tex] = 20 m/s (the dog maintained this velocity up to 80 m)
Δd = 100 m - 80 m = 20 m
Hence, the acceleration is (eq 1):
[tex] a = \frac{0 - (20 m/s)^{2}}{2*20 m} = -10 m/s^{2} [/tex]
The minus sign means that the dog is decelerating in the final section.
b) The time taken for the entire trip can be calculated as follows:
[tex] t = t_{0-30} + t_{30-80} + t_{80-100} [/tex] (2)
Hence, the time of each stage is:
Between 0 m to 30 mThe time can be found with the following equation:
[tex] t_{0-30} = \frac{v_{f} - v_{0}}{a} = \frac{20 m/s}{6.67 m/s^{2}} = 3.00 s [/tex]
Between 30 m to 80 mSince the acceleration is 0, the time can be calculated with the next kinematic equation:
[tex] \Delta d = v_{0}t - \frac{1}{2}at^{2} [/tex]
[tex] t_{30-80} = \frac{d_{f} - d_{i}}{v_{0}} = \frac{80 m - 30 m}{20 m/s} = 2.5 s [/tex]
Between 80 m to 100 mThe time is:
[tex] t_{80-100} = \frac{v_{f} - v_{0}}{a} = \frac{0 - 20 m/s}{-10 m/s^{2}} = 2.00 s [/tex]
Therefore, the time taken for the entire trip is (eq 2):
[tex] t = t_{0-30} + t_{30-80} + t_{80-100} = 3.00 s + 2.5 s + 2.00 s = 7.5 s [/tex]
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a car is traveling north. can its acceleration vector ever Point South? explain
When a car is traveling north, its acceleration vector can point south when it is slowing down.
A vector quantity has both magnitude and direction. The direction of a vector is always shown by the direction to which the arrow points.
If the car is travelling north, the direction of the acceleration vector will continue to point northwards.
However, when the car slows down, the direction of the accelerating vector will now point southwards.
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Collette has a prediction that college students ' immune systems have declined due to the use of hand sanitizers . This idea is a(n) :
The idea that "students ' immune systems have declined due to the use of hand sanitizers " is a hypothesis.
The term hypothesis refers to an intelligent guess or idea often based which is subject to scientific investigation via experiments.
A hypothesis may be right or wrong. We can only prove a hypothesis by subjecting it to a series of rigorous experiments.
Thus Collette's idea is a hypothesis.
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what is a law in physics?
Answer:
By nature, laws of Physics are stated facts which have been deduced and derived based on empirical observations. Simply put, the world around us works in a certain way, and physical laws are a way of classifying that “working.”
a student balances a 1.5kg of broom by placing her finger 1.4m from the end of the broom handle. How far from the broom handle would she have to balance the broom if she hung a 400g mass from the end of the broom handle?
The broom handle that she have to balance if she hung a 400g mass from the end of the broom handle is 5.24m
This problem is centered on moment. Moment is the turning effect of a force about a point. It is expressed as:
Moment = Force× Distance
According to principle of moment, the sum of clockwise moment is equal to sum of anticlockwise moment at shown
M1d1 = M2d2
Given the following
M1 = 1.5kg
d1 = 1.4m
M2 = 400g = 0.4kg
d2 is required
Substitute
1.5(1.4) = 0.4d2
2.1 = 0.4d2
d2 = 2.1/0.4
d2 = 5.24m
Hence the broom handle that she have to if she hung a 400g mass from the end of the broom handle is 5.24m
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The amount of heat rejected by a heat pump to the high temperature reservoir will always be greater than the amount of heat absorbed from the low temperature reservoir.
a. True
b. False
The amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir. The statement is true.
What is a heat pump?A heat pump is a device that uses a refrigeration cycle to transfer thermal energy from the outside to heat a building. Many heat pumps can also be used to cool a building by removing heat from the enclosed space and rejecting it outside.
Given the statement, the amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir is true.
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A projectile is launched with an initial speed of 15.5 m/s at an angle of 78 degrees above the horizontal,
What are the x and y components of the initial velocity?
Answer:
Explanation:
The formula for the x-components of the velocity vector is
[tex]V_x=Vcos\theta[/tex] and for the y-components it is
[tex]V_y=Vsin\theta[/tex] where V in both of those formulas is the magnitude of the velocity.
For the x-component, taking into consideration significant digits:
[tex]V_x=15.5cos(78)\\V_x=3.2\frac{m}{s}[/tex]
For the y-component, taking into consideration significant digits:
[tex]V_y=15.5sin(78)\\V_y=15\frac{m}{s}[/tex]
why do we observe winds blowing towards the equator
Answer:
The cooler air from region of up to 30degree latitude belt on both sides of the equator ,rushes toward the equator ,to take the place of warm rising air. This makes the wind to blow from north and south direction toward equators
If mass of body is 10 kg then its weight on moon is:
Please help
Answer:
moon gravity is about one sixth of earth gravity
W = 10(9.8/6) = 16 N
A soccer player is 15 m from her opponent's goal. she kicks the ball hard; after 0.50s, it flies past a defender who stands 5m away, and continues toward the goal. How much time does the goalie have to move into position to block the kick from the moment the ball leaves the kickers foot?
Answer:
Explanation:
ASSUMING the defender at 5 m is NOT the goalie.
the ball horizontal velocity is 5 m/0.5 s = 10 m/s
The goalie, presumably at the goal line, has 15 m / 10 m/s = 1.5 s to react and move to the ball position.
Must be little league soccer as 10 m/s is a rather wimpy soccer ball speed.
You have a 7 cubic foot container filled with mercury that you need to ship to have incinerated at a lab. What is the size of your container in cubic meters?
The size of your container in cubic meters is 0.1981.
Given the following data;
Size = 7 cubic footIn this exercise, you're required to convert the size of a 7 cubic foot container filled with mercury to cubic meters. Thus, we would convert the given size of the container in cubic foot to cubic meters.
Conversion:
1 cubic foot = 0.0283 cubic meter
7 cubic foot = X cubic meter
Cross-multiplying, we have;
X = [tex]0.0283[/tex] × [tex]7[/tex]
X = 0.1981 cubic meter.
Therefore, the size of your container in cubic meters is 0.1981.
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In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ground?
A.
1.2 joules
B.
4.9 joules
C.
2.0 joules
D.
6.8 joules
Answer:
Option C
Explanation:
2.0 Joules
Hope it helps!
What is difference between magnetic flux and magnetic flux linkage?
Answer:
Magnetic flux has formular: BA while Magnetic flux linkage has formula: NBA
Explanation:
N is number of turns of a coil
B is magnetic flux density across the coil
A is area of coil
[tex].[/tex]
TRUE OR FALSE
A moderate risk environment has protected and unprotected left turn
Answer:
Explanation:
True
-2 5/8 is bigger than -5/12
Answer:
hey...................................
"Force" can be defined as a push or a
O pull
O grab
Answer:
pull is your answer.
I HOPE your day goes great.
If you are given force and time, you can determine power if you can know
(a) watts
(b) energy
(c) distance
Answer:
joules/energy.
Explanation:
power is defined as the rate of work. Hence power=work/time, then you obtain Watts.
Work is the product of force and displacement.
Which statement is true?
The combustion of biomass can replace fossil fuels in conventional power plants.
Hydroelectric energy uses the energy from the sun, which is a renewable resource.
Oil is a non-renewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply.
Solar energy is a non-renewable resource that is used by many countries all over the world.
Answer:
Hello,
The combustion of biomass can replace fossil fuels in conventional power plants, which is true.
I hope I helped you :)
In Physics what's does cos and sin stand for?
Answer:
Sin = Sine
Cos = Cosine
Explanation:
Sin(θ) = Opposite/Hypotenuse
Cos(θ) = Adjacent/Hypotenuse
Vector A is 12.4 cm long and is pointing in a direction which is 73.0 degrees from the positive axis, measured in a counter-clockwise direction. Vector B is 15.1 cm long and is pointing in a direction which is 156.0 degrees from the positive axis, measured in a counter-clockwise direction. Calculate the x and y components of these vectors.
Answer:
Explanation:
I will ASSUME you mean the positive X axis.
Ax = 12.4cos73.0 = 3.6254...
Ay = 12.4sin73.0 = 11.8581...
Bx = 15.1cos156.0 = -13.7945...
By = 15.1sin156.0 = 6.1417...
The x components of vector A is 3.62 cm and the y components of vector A is 11.85 cm
The x components of vector B is -13.79 cm and the y components of vector B is 6.14 cm
The given parameters;
length of vector A = 12.4 cm
length of vector B = 15.1 cm
angle of vector A from the positive x-axis = 73⁰
angle of vector B from the positive x-axis = 156⁰
To find:
the x and y components of these vectorsThe x components of vector A:
[tex]A_x = A \times cos (\theta)\\\\A_x = 12.4 \ cm \times \ cos (73)\\\\A_x = 3.62 \ cm[/tex]
The y components of vector A:
[tex]A_y = A \times sin (\theta)\\\\A_y = 12.4 \ cm \times \ sin (73)\\\\A_y =11.85 \ cm[/tex]
The x components of vector B:
[tex]B_x = B \times cos (\theta)\\\\B_x = 15.1 \ cm \times \ cos (156)\\\\B_x = -13.79 \ cm[/tex]
The y components of vector B:
[tex]B_y = B \times sin (\theta)\\\\B_y = 15.1 \ cm \times \ sin (156)\\\\B_y = 6.14 \ cm[/tex]
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Suppose you're studying levels of job stress and measures of job efficiency in a nursing home. Which one of the following
statements best represents a data comparison that demonstrates a positive correlation?
O A. As job efficiency decreases, stress levels increase.
O B. As job efficiency increases, stress levels decline.
O C. As stress levels increase, job efficiency declines.
O D. As stress levels increase, job efficiency increases.
Answer:
B
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Answer:
b
Explanation:
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