difference between weightlessness in space and weightlessness in earth
In space we feel weightlessness because the earth's gravity has less effect on us. The Earth's gravitational attraction at those altitudes is only about 11% less than it is at the Earth's surface. If you had a ladder that could reach as high as the shuttle's orbit, your weight would be 11% less at the top.
What is the mean of 4, 6, 8, 20, 12?
10
00
5
Answer:
mean= sum of all values/ total no. of values
values given= 4,6,8,20,12
= 4+6+8+20+12/5
=50/5=10
HOPE IT HELPS
PLZ MARK AS BRAINLIEST
A biker starting from rest reaches a final speed of 3.0 m/s in 3 seconds. What is the acceleration of the biker?
Answer:
1 m/s²
Explanation:
Given:
v₀ = 0 m/s
v = 3.0 m/s
t = 3 s
Find: a
a = (v − v₀) / t
a = (3.0 m/s − 0 m/s) / 3 s
a = 1 m/s²
what is the momentum of an animal with a mass of 72kg who is moving with a velocity of 2.2 m/s
Answer:
The answer is
158.4 kgm/sExplanation:
The momentum of an object when given it's mass and velocity can be found by using the formula
momentum = velocity × massFrom the question
velocity = 2.2 m/s
mass = 72 kg
The momentum is
momentum = 2.2 × 72
We have the final answer as
158.4 kgm/sHope this helps you
i need help i don’t understand
Answer:
precise
Explanation:
im pretty sure
If you run 12 km at an average speed of 4 km/h, how
much time does it take?
Answer:
3 hours, I think
Explanation:
Answer:
3
Explanation:
The number of proton in a atom of 3H1 is
Answer:
5th hhssjn wixi. sjxbwjs. bajz wjxhqjzisjnisja
Answer:
the answer is 1
Explanation:
A car travels at a constant 1km per hour in the positive direction down a straight line highway. What is the displacement of the car 45 seconds later?
Explanation:
1 km/hr × (1000 m/km) × (1 hr / 3600 s) × 45 s = 12.5 m
A cargo with a mass of 50 kg can withstand a maximum velocity of 26 m/s. If dropped on the moon, where the acceleration due to gravity is -1.6 m/s2, how long will it be in free fall?
Record your answer as a positive number (because time cannot be negative) and round to the whole number.
You do not need to include units.
Wouldnt the answer be 1.6 m/s²?
I am sorry if its not.
A square sheet of rubber has sides that are 20 cm long. What is the area of the square of rubber in cm squared?
Area of the square of rubber =?
Answer:
400cm^2
Explanation:
sides are 20cm long Area for a square is a squared
since all the lides are of equal length you can just choose one side.
20squared is 400
20 x 20 = 400cm squared
Hope this helps :)
__________ is a severe condition that occurs from extreme exposure to the sun.
A. Heat stroke
B. Bulimia
C. Hypothermia
D. Sun burn
Answer:
Heat stroke
Explanation:
A ball is thrown upward. The total time the ball remains in the air is 14 s. a) With what speed was the ball thrown upward? b) What is the maximum height reached by the ball?
Answer:
a) Vi = 137.2 m/s
b) h = 960.4 m
Explanation:
a)
In order to find the initial speed we will use first equation of motion:
Vf = Vi + gt
where,
Vf = Final velocity = 0 m/s (since ball stops at highest point)
Vi = Initial Velocity = ?
g = - 9.8 m/s² (negative sign for upward moyion)
t = time interval = 14 s
Therefore,
0 m/s = Vi + (-9.8 m/s²)(14 s)
Vi = 137.2 m/s
b)
Now, we use second equation of motion to find height (h):
h = Vi t + (1/2)gt²
h = (137.2 m/s)(14 s) + (1/2)(-9.8 m/s²)(14 s)²
h = 1920.8 m - 960.4 m
h = 960.4 m
Two vectors, X and Y, form a right angle. Vector X is 48 inches long and vector Yis 14 inches long. The length of
the resultant vector is
inches
The nucleus of most atoms is composed of which of the following sub-atomic particles?
Answer:
protons (+ charge) & neutrons (neutral charge)
however protons has a positive charge so it determined what atom it is.
Answer:
tightly packed protons and neutrons
Explanation:
A current of 5A flows round a circuit in 2 minutes. How much charge flows round
the circuit in this time?
Answer:
just multiply 2 time 5 a
Explanation:
Identify which type of source is being described.
sources present original research, whereas
sources summarize scientific
information.
Answer:
Primary, secondary
Explanation:
Answer:
Identify which type of source is being described.
✔ Primary
sources present original research, whereas
✔ secondary
sources summarize scientific information.
Second Part----
Indicate whether each of the following is a primary source or a secondary source.
An article in Journal of the American Medical Association:
✔ primary source
An article in Time magazine:
✔ secondary source
An article in The New York Times newspaper:
✔ secondary source
Explanation:
Just did the problem.
20 POINTS! ANSWER CORRECTLY FOR BRAINLIEST!
Which of these is a similarity between a polar and a subtropical jet stream?
A. Both are formed at latitudes close to the poles.
B. Both are formed at latitudes close to the equator.
C. Both are formed at the boundary of warm and cool air masses.
(D not included because I know for a fact it is incorrect, I honestly think the answer is C but I just want other peoples opinions)
Answer:
C, Both are formed at the boundary of warm and cool air masses.
Answer:
c
Explanation:
Can anyone help me please?
Answer: 2 PARAGRAPH ESSAY
Explanation:Flexibility and stretching: preventing sports injuries
Many may know about all the different types of sports around the world. Lots can leave serious injuries. All across the world more than 1.2 million people have been injured because of sports or maybe more than that. Most of the injuries have been kids. To prevent these injuries from happening. One thing is stretching if you don’t stretch your bones more than likely you are not into your flexibility and reflexus that for they are very weak. If there is not enough flexibility within your movement you are more than likely not able to stretch. It can help the growth within your bone as well. If you have growth in your bones then you will get less injuries. If you break a bone such as your leg or sprain there is a chance that you will have problems with that specific leg later on in life. To prevent these types of events from happening I say stretch before a sporting game. Stretching can help with the impact of your flexibility. For example, Olympic gymnasts are able to do lots of tricks because their bones have flexibility in their bones. That's not saying that they will not hurt themselves, it's just such a low risk because their bone grew strength and flexibility. Some people's bones can be very sensitive then others so it might be kind of hard for them to be flexible. Another way to help people with their bone flexibility is drinking milk. Milk helps grow your bones. This can help prevent sport injuries in many ways. Lots of people get hurt in football to be more specific because it's such a durable sport as in tough. If they drink a lot of protein and milk before a game maybe even Carbohydrates their bones will be ready for the game. Flexibility and stretching can go lots of ways when it has to do with your body. JUST STAY FIT
Question 2 of 10
Which statement best describes how vomiting can help an animal maintain
homeostasis?
A. It keeps the animal's body temperature within a certain range.
B. It rids the body of something harmful.
C. It prompts the animal to eat healthy food.
D. It uses up excess energy in the body.
Answer:
I would say B. It rids the body of something harmful.
Explanation:
Vomiting usually tries to get rid of something bad in your stomach. If you vomit when your sick its because its trying to get rid of that sickness.
Hope this helps >:3
Answer:
B. It rids the body of something harmful.
Explanation:
PLEASE HELP!!!
Elements located in the vertical column of the periodic table are of the same _______ and have _______ chemical properties.
A. group
B. period
C. similar
D. different
E. style
F. unlike
Answer:
I think its A & C
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
Elements located in the vertical column of the periodic table are of the same group and have similar chemical properties, therefore the correct answer is option A and option C.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom.
While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside any atom.
The element belonging to the same group have approximately similar chemical behavior while on the other hand element belonging to the same period would have the same outermost shell.
The correct response is option A and option C because elements included in the vertical column of the periodic table belong to the same group and have comparable chemical characteristics.
Learn more about the atomic number here, refer to the link ;
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You accidentally throw your car keys horizontally at 8.0 m/s from a cliff. If yours keys land 28 m from the base of the cliff, how high was the cliff? Question 10 options: 17.15 m 60 m 45 m 28 m
Answer:
[tex]45m[/tex]
Explanation:
Let [tex]V_0[/tex] be the horizontal speed of the keys and D be the horizontal distance covered by the keys.
[tex]V_0= 8.0 \frac ms[/tex]
[tex]D= 28 m[/tex]
The initial velocity in the vertical direction is [tex]0[/tex].
Let [tex]g[/tex] be the acceleration due to gravity, which always acts vertically downwards, so, it will not change the horizontal direction of the speed, i.e. [tex]V_0[/tex] will remain constant throughout the projectile motion.
Let [tex]t[/tex] be the total time of flight in seconds. So,
[tex]D= V_0t[/tex]
[tex]\Rightarrow 28=8t[/tex]
[tex]\Rightarrow t=3 s \; \cdots (i)[/tex]
Let [tex]H[/tex] be the hight of the cliff.
Now, from the equation of motion
[tex]s=ut+\frac 1 2 at^2\;\cdots(ii)[/tex]
Where is the displacement is the direction of force, is the initial velocity in the direction of force, is the constant acceleration due to force and is the time of flight.
Here, , and (negative sign is for taking the sigh convention positive in the direction as shown in the figure.)
From equation (ii)
[tex]-H=0\times t + \frac 1 2 (-g)t^2[/tex]
[tex]\Rightarrow H= \frac 1 2 gt^2[/tex]
Take [tex]g= 10 \frac m{s^2}[/tex] and put the value of [tex]t[/tex] from equation (i), we have
[tex]H=\frac 1 2 \times 10\times 3^2[/tex]
[tex]\Rightarrow H= 45 m[/tex].
Hence, the height of the cliff was [tex]45 m[/tex].
11. If humans continue to divert water from rivers for crops, drinking and industry, what parts of the water cycle are most affected?
A. Runoff and Accumulation
B. Evaporation and Transpiration
C. Evaporation and Precipitation
A runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s.
What was his average acceleration?
We have that the average acceleration is
[tex]a=5m/s^2[/tex]
From the Question we are told that
Decreases his velocity from 20 m/s to 10 m/s in 2.0 s.\
Generally the equation for the average acceleration is mathematically given as
[tex]a=\frac{u-v}{t}\\\\a=\frac{20-10}{2}[/tex]
[tex]a=5m/s^2[/tex]
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what are groups of periodic table
Explanation:
there are 8 groups of the periodic table
group number one is of the alkali metals
group number two use of the alkaline Earth metals
group number three is known as group (III)
group number for is known as group IV
group number V is known as group V group number six is known as group VI
group number seven is known as halogens
and group number eight is of the noble gases
the periodic table does not have 18 groups as the elements between group III and group IV all known as the transition metals.
A race car accelerates from 0 m/s to 20.0 m/s with a displacement of 35.0 m. What is the vehicle's acceleration?
a 5.7 m/s2
b .84 m/s2
c 6.1 m/s2
d .29 m/s2
Explanation:
Using Equations of Motion :
[tex] {v}^{2} = {u}^{2} + 2as[/tex]
[tex]a = \frac{{v}^{2} - {u}^{2}}{2s} = \frac{400 - 0}{70} = 5.71msec^{ - 2} [/tex]
Why is it important to describe motion in universal terms?
Answer:
Motion requires force to cause that change. The time you take to travel the distance depends upon speed; the distance travelled is measured as the length of a line between the start and end of a motion. It is an important aspect in physics. In our lives motion is important and impacts so many things that we do.
Explanation:
The motion of every object is relative, thus it is important to discuss this motion in universal terms which serves as a reference point.
The motion of an object occurs when there is change in the position of the object with time and the object moves in the direction of the applied force. This motion is influenced by the net force acting on the object.
For example:
The dimension of speed of object in motion is measured with two fundamental quantities (length and time);
speed = LT⁻¹
The motion of every object is relative, thus it is important to discuss this motion in universal terms which serves as a reference point.
Learn more here:https://brainly.com/question/20337199
how far will a skateboard travel in 30 seconds if traveling at a speed of 3 m/s
HELP ME PLZ!!!! I'LL DO ABSOLUTELY ANYTHING, AND I MEAN ANYTHING!!!!!!
Answer:
There are so many things that make human travel difficult.
Here are some ideas ;
1) Air and Water -Taking water and oxygen from the Earth is very expensive and very difficult. (Note that if there is lots of water, oxygen can be made from the water. Also, if there is carbon dioxide, oxygen can be made.)
2) Food - people will need to grow their own food on another planet - transportation to and from Earth is, again, too expensive. Plants need carbon dioxide and sunlight (real sunlight is best; artificial lighting will work, too.)
3) Energy - Human settlements will need to create their own energy. Energy can be created using the sun.
Note that these powers have their own advantages and disadvantages
4) Radiation - Radiation is harmful for people, plants and animals. On Earth, we are protected by a magnetic field and an atmosphere. Some planets and moons have neither; some have only one or the other. Very few have both. Some planets have very strong magnetic fields that create even more radiation. Crazy right .
5) Gravity - planets or moons with a lesser gravitational pull than the Earth will result in astronauts having smaller bone and muscle mass, which is a serious problem if they are to come back to Earth. The closer a planet's gravity is to Earth, the less of a problem this is.
6) Atmosphere - Some planets have no atmosphere while some have atmospheres that will crush people(Woah ) .It's easier to deal with low-pressure rather than high-pressure, but both are dangerous if there is an air leak.
7) Distance - the further a planet is from Earth, the harder it is to.
8) Temperature - The hotter or colder a planet is, the more energy it will take to change the temperature(and im not really sure how ).
Explanation:
Which statement explains why carbon 14 dating cannot be used to date ancient rocks
Answer:
Carbon-14 decays relatively quickly
Explanation:
i took the test
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 50.0 km/h, 8.0 min at 70.0 km/h, and 35.0 min at 35.0 km/h and spends 40.0 min eating lunch and buying gas. Determine the average sped for the trip. Determine the difference between the intial citties along the route.
Answer:
Average speed = 40.50 km/h (Approx)
Explanation:
Distance = Time × Speed
Total distance = (40/60) 50 + (8/60) 70 + (35/60) 35
Total distance = 33.33 km + 9.33 km + 20.17 km
Total distance = 62.80 km
Average speed = Total distance / Total time taken
Average speed = 62.80 / [(40+8+35+40)/60]
Average speed = 62.80 / 1.55
Average speed = 40.50 km/h (Approx)