The mass of a cube is 16cm and the volume is 8cm3. What is the density?
Answer:
the density is 2
Explanation:
mass divided by volume is density
16 divided by 8 is 2
Which description is evidence of chemical weathering?
k
O A. A rock in a windy desert has scratches on
its surface.
B. A rock in a tundra has deep cracks filled
with ice.
C. A rock turns a reddish color when
exposed to air and water.
D. A rockban a steep slope falls to the
ground and breaks apart.
Check
Answer:
b.
Explanation: I do not know much about this but the answer that i think it is was b.
A rock turns a reddish color when exposed to air and water. this description is evidence of chemical weathering
Chemical weathering is demonstrated by the fact that "a rock turns a reddish colour when exposed to air and water." The breakdown of rocks occurs through a process known as chemical weathering, which involves chemical interactions with elements including water, oxygen, and acids. The iron in the rock may have oxidised, which is when iron in the rock combines with oxygen and water to generate iron oxide (rust), giving the material its reddish hue. The physical weathering produced by wind-borne particles is described in Option A, the physical weathering induced by freeze-thaw cycles is described in Option B, and the physical weathering caused by gravity and the impact of the rock striking the ground is described in Option D.
Hence option C is correct.
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In the united states a standard letter sized piece of paper is 8.5 inches wide by 11 inches long. The international standard for a letter sized piece of paper is different. The international standard based on SI units:21.0cm wide by 29.7 cm long
This question is incomplete
Complete Question
In the United States, a standard letter-sized piece of paper is 8.5 inches wide by 11 inches long. The international standard for a letter-sized piece of paper is different. The international standard is based on SI units: 21.0 cm wide by 29.7 cm long.
a. Convert 21.0 cm to inches. Show your dimensional analysis setup.
b. Convert 29.7 cm to inches. Show your dimensional analysis setup.
c. State the dimensions, in inches, of the international standard for a letter-sized piece of paper.
d. Which piece of paper is longer: a U.S. letter-sized piece of paper, or an international letter-sized piece of paper?
Answer:
a) 8.267721 inches ≈ 8.3 inches
b) 11.6929197 inches ≈ 11.7 inches
c) It's dimensions in inches for the international standard for letter - sized for paper = 8.3 wide inches by 11.7 inches long
d) The International standard letter - sized paper is longer.
Explanation:
a. Convert 21.0 cm to inches. Show your dimensional analysis setup.
1 cm = 0.393701inch
21 cm =
Cross Multiply
21 cm × 0.393701inch/ 1 cm
= 8.267721 inches
Approximately 8.3 inches
b. Convert 29.7 cm to inches. Show your dimensional analysis setup.
1 cm = 0.393701inch
29.7 cm =
Cross Multiply
29.7 × 0.393701 inch/ 1 cm
= 11.6929197 inches
Approximately 11.7 inches
c. State the dimensions, in inches, of the international standard for a letter-sized piece of paper.
The international standard for a letter-sized has dimensions 21.0 cm wide by 29.7 cm long.
Where
21.0cm = 8.267721 inches
≈ 8.3 inches
29.7cm = 11.6929197 inches
≈ 11.7 inches
Hence, it's dimensions in inches = 8.3 inches by 11.7 inches.
d. Which piece of paper is longer: a U.S. letter-sized piece of paper, or an international letter-sized piece of paper?
U.S letter - sized paper = 8.5 inches wide by 11 inches long
International standard letter- sized paper = 8.3 wide inches by 11.7 inches long.
Hence, the International standard letter - sized paper is longer.
Can someone tell me the ans of this question please
Answer:
C
Explanation:
C. Time one oscillation
(8.62 x 10-2) - (1.94 x 10-2)
Answer:
66.8
Explanation:
hope this helps
Answer:
66.8Explanation:
[tex](8.62 \times 10 - 2) - (1.94 \times 10 - 2)[/tex]
Follow the PEDMAS order of Operation
[tex]8.62 \times 10 - 2 - 1.94 \times 10 + 2 \\ 86.2 - 2 - 19.4 + 2 \\ 86.2 - 2 - 17.4 \\ = 66.8[/tex]
Scientific models have two basic types. Please select the best answer from the choices provided T F
Answer:
Scientific models have two basic types. FALSE.
Hoped I helped
What should Lidia do if she is planning to have children one day?
She should get married.
a resistance of 30 ohms is placed in a circuit with 90 volt battery what current flow in the circuit
Answer:
3amps
Explanation:
voltage v = current I × resistance R
current = voltage÷ resistance = 90÷30= 3amperes
Which one of the 5W + H questions does the following statistic answer?
The world's fastest roller coaster reaches a speed of almost 150 miles per hour, requiring thrill-seekers to wear goggles when they ride!
(1 point)
How
Who
Where
When
Answer:Proven answer:: is How just did it online Connections A.
Explanation:
Answer:
How is the answer.
Explanation:
A particle makes 240 revolution per minutes on a circular radius of 2m find: (I) it's period (ii) it's angular velocity (III) it's linear velocity and (iv) it's acceleration
Answer:
(i) The period is 0.25 seconds, (ii) The angular velocity is approximately 25.133 radians per second, (iii) The linear velocity of the particle is approximately 50.266 meters per second, (iv) The acceleration experimented by the particle is approximately 1263.336 meters per square second.
Explanation:
(i) Let suppose that particle experiments an uniform circular motion. The period ([tex]T[/tex]) of the particle, measured in seconds, is the time needed to complete a revolution, which is determined by this:
[tex]T = \frac{2\pi}{\omega}[/tex]
Where [tex]\omega[/tex] is the angular speed, measured in radians per second.
Let is convert angular speed from revolutions per minute into radians per second:
[tex]\omega = \left(240\,\frac{rev}{min} \right)\times \left(\frac{1}{60}\,\frac{min}{s} \right)\times \left(2\pi\,\frac{rad}{rev} \right)[/tex]
[tex]\omega \approx 25.133\,\frac{rad}{s}[/tex]
The period of the particle is:
[tex]T = \frac{2\pi}{25.133\,\frac{rad}{s} }[/tex]
[tex]T \approx 0.25\,s[/tex]
The period is 0.25 seconds.
(ii) The angular velocity is approximately 25.133 radians per second.
(iii) The linear velocity of the particle ([tex]v[/tex]), measured in meters per second, is found by this expression:
[tex]v = R\cdot \omega[/tex]
Where:
[tex]R[/tex] - Radius, measured in meters.
[tex]\omega[/tex] - Angular velocity, measured in radians per second.
If [tex]R = 2\,m[/tex] and [tex]\omega \approx 25.133\,\frac{rad}{s}[/tex], the linear velocity of the particle is:
[tex]v = (2\,m)\cdot \left(25.133\,\frac{rad}{s} \right)[/tex]
[tex]v \approx 50.266\,\frac{m}{s}[/tex]
The linear velocity of the particle is approximately 50.266 meters per second.
(iv) As particle rotates at constant speed, resultant acceleration ([tex]a[/tex]) is entirely radial and modelled by this expression:
[tex]a = \omega^{2}\cdot R[/tex]
[tex]a = \left(25.133\,\frac{rad}{s} \right)^{2}\cdot (2\,m)[/tex]
[tex]a \approx 1263.336\,\frac{m}{s^{2}}[/tex]
The acceleration experimented by the particle is approximately 1263.336 meters per square second.
what are the uses of rockets
They are used to be able to go out of Earth and into space to Be able to explore and toBe able to prove and tell about Earth and space
I am confused can anyone please answer it There are blast taking place on Sun all the time we reach the heat and energy of the blasts taking place on Sun but why we can't hear the sound produced by these blasts why can't we hear the sound of these blasts???
Answer:
Umm I think because the sun is too far away from the earth
hope it helps...
Because of the sound wave, the wave cant travel through the vacuum. Also theres no sound in space.
What is the total mass of the object if the scale is balanced? (The black triangles show the location of the riders.) Do NOT include units with your answer. (Units would be grams). PLEASE HELP
If I'm understanding the picture, it looks like the riders add up to 117.8 .
What will happen If you're In a car, and the drlver slams on
the brake?
A
You will stop moving.
B
You will continue moving forward.
C
You will gradually slow down.
Answer:B
Explanation:
Due to the inertia the body in motion will try to remain in the state of motion.
In your own words, explain why seconds are derived from an actual value and not an arbitrary one.
Answer:
Second is a unit for measuring time. As the scientist usually wants precision, is needed that the units are well defined and that the unit is exactly the same for everyone.
So, if for example, (and for some weird reason) you do not have access to a precise clock to measure one second, you can use the actual value (by definition) of the second to find the exact length of a second.
So, resuming is used for consistency.
We have that The second was derive from a number that is
[tex]\frac{1}{86400}[/tex] of a solar day(24hours)
it is important to note that the seconds was discovered or established before clocks
Now, seconds are derived from an actual value and not an arbitrary one.
The second was derive from a number that is [tex]\frac{1}{86400}[/tex] of a solar day(24hours)
The second was designed to make the its value as close as possible to this number in the modern day seconds
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6. If Dr. Swasey is like most psychologists, where does she probably work?
a. university/college
b. self-employed
c. federal government
d. state or local government
Answer: University/college
Explanation:
A psychologist is someone who studies the cognitive, emotional, and mental states of people by observing and recording how people relate with each other and their environment.
Most psychologists are found in universities in order to help students who have emotional issues or seeking answers to certain questions.
The MSDS for benzene indicates that it is a clear liquid that has a substantial vapor pressure. It has a health rating of
2, a fire rating of 3, and a reactivity rating of 0. It is a cancer-causing agent.
Based on this information, which statement about benzene is accurate?
-Benzene readily reacts with moist air.
-Benzene explodes if the container is shaken.
-Benzene must be kept away from flames.
Benzene must be stored under high pressure.
Answer:
Benzene must be kept away from flames.
Explanation:
just took quiz
Answer:
Benzene must be kept away from flames.
Explanation:
Technician A says that work is being performed if a force is being applied, yet the object does not move. Technician B says that torque is a twisting force that may or may not result in motion. Which technician is correct
Answer:
Technician B is correctExplanation:
According to technician B "torque is a twisting force that may or may not result in motion" which is right, but technician A is wrong in the sence that for work to be done the force must be applied over a distance that is there must be movement over a distance.
What is work?
work is the application of force over a distance
mathematically
work= force* distance
and it is measured in joules
What is torque?
Torque is a measure of the force that can cause an object to rotate about an axis(hence it is very possible that the object maintained its position)
Help me I do not understand
Answer:
170N
Explanation:
First add 530N to 150N and you get 680N, then add 400N to 450N and get 850N. So subtract 850N by 680N and you get 170N
What is temperature?
An atom of tungsten (W) has 74 protons. The atomic mass of tungsten is 183.84.
How many neutrons does an atom of tungsten have? Round your answer to the nearest whole number.
Intro
Done
Answer:
110
Explanation:
to find neutrons we have to subtract the atomic number from the atomic mass.
atomic mass = 183.84
atomic no = 74
183.84 - 74 = 109.84
round off = 110
Answer:
110
Explanation:
edg. 2020
If the answer to your calculation has units of kg • m2/s2 , what type of quantity could it be? (There could be more than one correct choice.)
Answer:
B work, rotational kinetic energy
And torque
Because
Work = F x s
= ML²/T²
rotational kinetic energy= 1/2I* omega²
= ML²/T²
And torque is also
ML²/T²
a study where you try to observe subjects in a natural environment is a(n)
Answer:
i think it Naturalistic observation
Explanation:
Is it important to know the difference between atoms,ions,and isotopes
No. It's not important at all.
UNLESS you're going to read about them, write about them, study them, talk about them, or work with them. THEN it's pretty important.
Express the answer to 4.31x10^7 multiplied by 5.41x10^5 scientific notation.
Answer:
The product of the two numbers is 2.33* 10^13
Explanation:
Given
4.31x10⁷ and 5.41x10⁵
Required
Multiply
The multiplication of the two digits is represented as thus:
[tex]Result = 4.31 * 10^7 * 5.41 * 10^5[/tex]
This can also be rewritten as
[tex]Result = 4.31 * 5.41 * 10^7 * 10^5[/tex]
Multiply 4.31 and 5.41
[tex]Result = 23.3171 * 10^7 * 10^5[/tex]
Apply laws of indices
[tex]Result = 23.3171 * 10^{7+5}[/tex]
[tex]Result = 23.3171 * 10^{12}[/tex]
The scientific notation is always in the form: [tex]a * 10^n[/tex]
Where [tex]1 \leq\ a \leq 10[/tex]
So:
23.3171 can be rewritten as 2.33171 * 10
So, we have:
[tex]Result = 2.33171 * 10* 10^{12}[/tex]
Also, apply law of indices again
[tex]Result = 2.33171 * 10^{1+12}[/tex]
[tex]Result = 2.33171 * 10^{13}[/tex]
It's always advisable (but not compulsory to approximate to 1 or 2 decimal places)
So:
[tex]Result = 2.33* 10^{13}[/tex]
Hence; the product of the two numbers is 2.33* 10^13
how to find the acceleration of on object at a slope
Answer:
i need free points sry
Explanation:
Answer:
If the object is moving with an acceleration of +4 m/s/s (i.e., changing its velocity by 4 m/s per second), then the slope of the line will be +4 m/s/s.
hope this helps you
if the KE is increased by 4 times what will be the velocity
Answer: velocity would doubled
Explanation:
As we know the k.e relation is given by
K.E= 0.5 m v^2
Keeping the mass same and increasing the k.e 4 times makes the velocity double.
The force of gravity pulls down on your school with a total force of 400,000 newtons. The force of gravity pulling down on your school would be exactly twice as much if your school: a Had twice as much mass b Was twice as tall c Had twice as much volume d Covered twice as much area pleaseeee help
Answer:
A
Explanation:
Force of gravity can be expressed as:
F = GMM/R^2
Where
F = gravitational force
M = mass
R = distance
Also, W = mg
From the above equation, we can deduce that force of gravity actually depends on mass and not volume.
The correct answer is therefore A.
Had twice as much mass
Therefore, the force of gravity pulls down on your school with a total force of 400,000 newtons. The force of gravity pulling down on your school would be exactly twice as much if your school Had twice as much mass
a car goes from 16 m/s to 2 m/s in 3.5 s what is the cars acceleration
Answer:4m/s^2
Explanation:
Vf=Vi+at
why is Pulley used to lift water from well
Answer:
Because wells are deep and a pulley can scoop up the water with a bucket and bring it back to the surface