Answer:
yes
Explanation:
we can clearly say that our ancestor are our guide.
Because of they give us different knowledge about evolution of life and etc.
What role does the sun play in driving the water cycle in Antarctica
Answer:
the inner regions of antarctica gets only about 2 inches of precipitation per year. the winds here blow up snow from the land and put it into the atmosphere, which is part of the water cycle. and the sun helps out, too, causing sublimation to occur, which causes snow to evaporate directly into water vapor gas.
Explanation:
good luck, hope this helps :)
have a nice day !!
please help me
A football player kicks a football and exerts a force on the football of 0.4 kg (m/s²). The football’s acceleration is 0.92 m/s². What is the mass of the football?
Answer:
0.368 Newtons
Explanation:
Answer:
i think it's 0.88
Explanation:
thuli wants to buy tv for R8500.a bank offers to loan her the money at an interest rate of 5%.she decides to pay the tv off in 3 years calculate the simple interest she will have to pay .also calculate the total she will pay
Answer:
The total she has to pay is R8500 plus the 5% interest.
PLEASE ADD BRAINEEST
In a thunderstorm at 32.0°C, Reginald sees a bolt of lightning and hears the thunderclap 2.00s later. How far from Reginald did the lightning strike? The speed of sound through air at 32.0° C is 350.2 m/s.
Answer:
dont have the answer but you cute
Explanation:
What is the most likely evidence of an energy transformation taking place when a wire that is twisted and turned breaks? (5 points)
Reddish glow is emitted as kinetic energy is transformed into thermal energy
Reddish glow is emitted as kinetic energy is transformed into electrical energy
Broken end of the wire turns hot as kinetic energy is transformed into thermal energy
Broken end of the wire turns hot as kinetic energy is transformed into electrical energy
Answer:
C
Explanation:
An airplane is cruising at a speed of 250 m/s. If the airplanes engines provide a forward force of 19,540 N, calculate the force of the air resistance (friction) that is acting on the plane.
Answer:
19,540 N
Explanation:
if you have a force at an angle in order to get it with the horizontal you get the Force times cosine the angle and if you want it with the vertical you got the Force times sine the angle
A car traveled 210 km in 1.5 hrs, what was the car's average speed?
Answer:
140km/h
Explanation:
Average speed= Distance/Time
= 210/1.5
= 140 I'm/h
What happens to the temperature of an air mass as it rises, and why? What happens to the temperature of an air mass as it rises, and why? Temperature increases because fewer air molecules allow the air mass to expand. Temperature decreases because increasing numbers of air molecules allow the mass to expand. Temperature increases because more air molecules force the air mass to contract. Temperature decreases because fewer air molecules allow the air mass to expand. Temperature remains the same because fewer air molecules allow the air mass to expand.
Answer:
Temperature decreases because fewer air molecules allow the air mass to expand.
Explanation:
Temperature of air mass decreases as it rises . It is so because at upper strata
of atmosphere , air is sparse and therefore air molecules there is relatively less . It results in lower pressure around air mass going up . This results in expansion of gas . Molecules have to do work against mutual attractive force for expansion so their energy becomes less . This cools down the air.
A business jet of mass 24000kg takes off when the thrust for each of two engines is 34000N. Find the acceleration.
Answer:
1.42 m/s²
Explanation:
From the question,
F = ma.................... Equation 1
Where F = force, m = mass of the jet, a = acceleration of the jet
make a the subject of the equation
a = F/m................. Equation 2
Given: F = 34000 N, m = 24000 kg
Substitute into equation 2
a = 34000/24000
a = 1.42 m/s²
Please sb help me fr
Answer:
I think it might be box 1. Hope this is right have a good day
me lo traduses plis no se ingles solo escribe lo que dice en la guia
(b) The difference h between the two liquid levels is 2.0 cm. The density of the
liquid is 800 kg /m3.
Calculate the difference between the pressure of the gas and atmospheric
pressure.
.[2]
pressure difference
Answer:
101201.2 Pascal.
Explanation:
Given that the difference h between the two liquid levels is 2.0 cm. The density of the liquid is 800 kg /m3.
Calculate the difference between the pressure of the gas and atmospheric
pressure.
The pressure of the gas can be calculated by using the formula
Pressure = density × acceleration due to gravity × height
Substitute all the parameters into the formula
Pressure = 800 × 2/100 × 9.8
Note that the height is converted to metre.
Pressure = 156.8 Pascal
pressure difference = 101358 - 156.8
Pressure difference = 101201.2 Pascal
Click on the graphic below until the correct answer appears.
Which applies to a real machine?
Answer:
there is no graphic
Explanation:
4-08 t 1 - / S P = 1 / P = S 1 S= P Def. of Speed
Answer:
what do I answer? not enough information
A small difference between means may not be statistically significant, but it could reach statistical significance with a large sample becausea) As N increases, the standard error gets smaller, reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences.b) As N increases, distributions get more heterogeneous, allowing small differences to be detected.c) The overlap between distributions grows as sample size increases.d) The difference between means gets larger as sample size increases
Answer:
Increasing the sample size could make a small difference between means reach statistical significance because;
a) As N increases the standard error gets smaller reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences
Explanation:
The p-value of a test statistic is used to express the level of significance of the test result. A significant result is typically considered as one with a small p-value of less than or equal to 0.05 at which point we reject the null hypothesis
The p-value can be made smaller by either
1) Increasing the size of the sample (N)
2) Decreasing the standard error
3) Increasing the difference between the hypothesized parameter and the statistic of the sample
The standard error, SE, is given as follows;
[tex]SE = \dfrac{\sigma}{\sqrt{N} }[/tex]
Where;
σ = The standard deviation of the sample
n = The sample size
Therefore the standard error decreases, gets smaller, with increasing sample size, N
Therefore, the small difference between the sample mean could reach statistical significance with a large sample because as N increases the standard error gets smaller reflecting less variability in sample means, which allows greater sensitivity to detect small but significant differences.
Which of these is a unique use of gamma radiation?
A. Detection of thyroid cancer
O B. CT scanners
C. Smoke detectors
D. Killing bacteria
SUBMIT
Who knows
Answer:
the answer would be 'd'
Explanation:
im really good at this stuff
The unique use of gamma radiation is Killing bacteria. The correct option is D.
What is gamma radiation?Gamma radiation is a type of electromagnetic radiation that is highly energetic and has no mass or charge. It is the most penetrating form of radiation and is often emitted during radioactive decay or nuclear reactions. Gamma rays have the shortest wavelengths and highest frequencies in the electromagnetic spectrum, ranging from about 0.1 nanometers to 10 picometers in wavelength. They can cause ionization in matter, meaning they can knock electrons out of atoms or molecules, making them highly damaging to living tissue. Gamma radiation is commonly used in medical imaging and cancer treatment, as well as in industrial applications for sterilization and food preservation.
Here in the Question,
Option A. Detection of thyroid cancer: Gamma radiation is used in medical imaging techniques such as PET scans and SPECT scans to diagnose cancerous conditions, but it is not unique to the detection of thyroid cancer.
Option B. CT scanners: Gamma radiation is not used in CT (computed tomography) scanners. CT scanners use a series of X-rays to produce detailed images of the inside of the body.
Option C. Smoke detectors: Smoke detectors use a small amount of radioactive material, typically americium-241, to ionize air particles and detect the presence of smoke. While gamma radiation is a type of ionizing radiation, smoke detectors do not use gamma radiation specifically.
Option D. Killing bacteria: Gamma radiation is used in the food industry to kill bacteria and sterilize food products, such as spices, meat, and poultry. This is a unique use of gamma radiation, as it relies on its ability to destroy microorganisms at high doses while leaving no residual radiation.
Therefore, The correct answer is option D i.e Killing bacteria.
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A huge asteroid that is moving at an incredibly fast speed impacts the Earth, will this change the momentum of the Earth? Explain.
An old woman is worried about time. She walks at a rate of 2 meters per second and travels a
distance of 454 meters. How long does it take her to complete the motion?
Please help ASAP!! BRAINLIST please explain thankyou!!!
Answer:
227 seconds.
Explanation:
Speed is equal to distance divided by time. s = d/t
We can rearrange this algebraically to solve for the time it will take to cover a certain distance at a certain speed. Time is equal to distance divided by speed. t = d/s
Then we substiture our known values for the variables and solve for our unknown.
t = 454m / 2m/s = 227s
Answer:
If the lady is traveling 2 meters per second and she travels 454 meters then you will have to divide 454 by 2 to get the amount of time she walked.
454 divided by 2 = 227
This means that the lady traveled for 227 seconds or about 3.78 minutes.
When an object (like a ball) falls, some of its___ energy changes to ___ energy, due to the law of conservation of energy
Answer:
potential, kinetic
Explanation:
pls give brainliest :p
what is the momentum of an object with 9.74 kg and 15 m/s?
Answer: 146.1 kg/m/s
Explanation: Momentum is equal to mass times velocity, so you do 9.74 kg times 15 m/s and get 146.1 kg/m/s.
What is the weight of an astronaut with a mass of 75 kg on the moon? The gravitational field strength on the moon is 1.6 Nkg-1.
okay this is kinda easy
What is the gravitational field strength on the moon?
The Moon has a gravitational field strength of 1.6 N/kg.
Blood enters the right side of the heart and travels to the lungs. There, the lungs eliminate carbon dioxide and exchange it for more oxygen. The oxygen-rich blood enters the left side of the heart. Then, arteries carry blood away from the heart. What process is being described?
Answer:
Blood circulation
Explanation:
The process being described is the circulation of blood.
Oxygen-rich blood leaves the heart through arteries and is transported to various cells and tissues where the exchange of oxygen for carbon dioxide takes place. Thereafter, the oxygen-deficient/carbon dioxide-rich blood moves into the veins and returns to the right side of the heart before traveling to the lung. In the lung, the carbon dioxide in the blood is exchanged for oxygen before the blood enters the left side of the heart and circulated all over again.
can a body have zero velocity and finite acceleration?Explain
Answer:
Kinda? Depends what the question is fully asking
Explanation:
Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.
So that -2 m/s thing after one second will be going -1 m/s.
After another second it'll be going 0 m/s.
After another itll be going +1 m/s and so on.
So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.
Describe two possibilities of what will happen to the universe in the future.
The Universe in the future have two possibilities:
The Universe will come to an end in the opposite of a Big Bang called The Big Crunch. The other possibility is that we live in an Eternal Universe that will never come to end.What is universe?Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the dust , gases, rocks forms the universe.
The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.
The universe consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium. The two possibilities:
The Universe will come to an end in the opposite of a Big Bang.The other possibility is that we live in an Eternal Universe that will never come to end.This universe is still on it way of expanding more.
Thus, the future possibilities of universe are explained.
Learn more about universe.
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.
A .63 kg ball is moving at 4.3m/s. What is the momentum of the ball?
Answer:
Given Mas (m) =63kg
velocity (v) =4.3m/s
momentum (p) =?
p=mv
63kgx4.3m/s
270.9kg.m/s
the momentum =270.9kg.m /s
If a ball of mass 0.63 kilograms is moving at 4.3 meters/seconds, then the momentum of the ball would be 2.709-kilogram meters/second.
What is momentum?It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle.
Momentum = mass of the object × velocity of the object
As given in the problem we have to calculate the momentum of the ball if it has a mass of 0.63 kilograms and moving with a speed of 4.3 meters/seconds,
The momentum of the ball = 0.63× 4.3
=2.709 kilogram meters/second
Thus, the momentum of the ball comes out to be 2.709-kilogram meters/second.
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How much work is done when a 100 N force moves a block 20 meters
Answer:
Hope this helps if not so sorry ;-;
Explanation:
Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F *
Note:
Have a nice day :)
What is the mass of a child in a wagon that has a velocity of 10 m/s and a Momentum of 30 KG* M/S
P=MXV
Explanation:
sinces : Momentum = velocity × mass
then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg
SCIENCE<3:: will give brainliest! :)
Answer:
Option two
Explanation:
im smort
Answer:
I think it's B. there is a cold air mass pushing warm air mass up and replacing it over San Francisco
Describe how an electromagnet can make a motor run.
After being pushed and released, a 50 kg crate slides across a factory floor. Friction on the sliding crate is 200 N, what is the crates acceleration ?
Can sb help me frfr