I need help asap I would be happy if you helped me
assuming air resistance is negligible, how fast would ball be travelling as it hits the floor after free-falling from rest for 5 second
A rainbow is seen in a rainy day. Describe its reason
Answer:
A rainbow requires water droplets to be floating in the air. That's why we see them right after it rains. The Sun must be behind you and the clouds cleared away from the Sun for the rainbow to appears.
The length of a rectangle plus its width is 52 cm. The area is 672 square cm. What are the length and width of the rectangle?
Answer:
technically nfrbhrbbrbbf but also the skier can hurt himself if he speeds up
Explanation:
need points so plz like it
Answer:
Lenght= 12.92cm
Width= 52cm
stephen schwartz created the musical godspell as well as __________.
Answer:
Stephen Lawrence Schwartz (born March 6, 1948) is an American musical theater lyricist and composer. In a career spanning over five decades, Schwartz has written such hit musicals as Godspell (1971), Pippin (1972), and Wicked (2003).
Explanation:
Show the work please and thank you!
Answer:
Explanation:
60 times 5=300+24=324
207/324= aveage i dont have a calculator
use the average and mutiple by 88 minutes
Convert: 8 mm: ____________ cm
-1^10
centi=10 mm and mm=1/10=10^-1 cm
Answer the question below and show all work.
Answer:
Explanation:7
what is the smallest possible value for the index of refraction?
Answer:
1.0
Explanation:
The smallest possible value for the index of refraction is 1.0.
What is Index of refraction?This talks about how fast light travels through an object by taking note of how much the light is bent, or refracted, as it enters into the material.
The smallest possible value for the index of refraction is 1.0 because the speed of light in any medium is always less than than the speed of light in air or vacuum.
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What will happen if a renewable resource is used up faster than it can be
replenished or regenerated? *
Answer:
there will be no more if a resource is used up you have to find a new aource
A book is to be produced with pages of thickness 0.125mm.If the book is to be exactly 1cm thick what is the maximum number of pages it can contain?
Answer:
1cm=10mm
10cm/0.125mm
80pages
what is the standard measurement system used by scientists around the world?
Answer:
Hey mate....
Explanation:
This is ur answer....
The International System of Units (SI), commonly known as the metric system, is the international standard for measurement.Hope it helps!
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International system of units.French système international d'Unitès, international decimal system of weights and measures derived from and extending the metric system of units.Adopted by the 11th General conference on weights and measures (CGPM) in 1960, It is abbreviated SI in all languages.
a dog is running at 5.5 m/s then comes to a complete stop in 1.5 seconds. What is the dogs acceleration?
The dog's acceleration running at 5.5 m/s then comes to a complete stop in 1.5 seconds is 8.25m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving object can be calculated by multiplying the velocity of the object by the time taken. That is;Acceleration (m/s²) = speed (m/s) × time (s)According to this question, a dog is running at 5.5 m/s then comes to a complete stop in 1.5 seconds. The acceleration can be calculated as follows:Acceleration = 5.5 × 1.5Acceleration = 8.25m/s²Therefore, the dog's acceleration running at 5.5 m/s then comes to a complete stop in 1.5 seconds is 8.25m/s².Learn more at: https://brainly.com/question/19573976?referrer=searchResults
how can you reduce the percentage uncertainty in measurements that you make?
An automobile travels the first half of an 80.0 mi trip at 20.0 mi/h and the second half of the trip at 40.0 mi/h. What is the average speed for the entire trip?
This question involves the concepts of uniform speed motion and average speed.
The average speed for the entire trip is "26.67 mi/h".
First, we need to find out the total time taken for the entire trip. For that purpose, we will break the entire trip into two halves of uniform speed motion:
[tex]Total\ Time = t_1+t_2\\\\Total\ Time = \frac{s_1}{v_1}+\frac{s_2}{v_2}\\\\Total\ Time = \frac{40\ mi}{20\ mi/h}+\frac{40\ mi}{40\ mi/h}\\\\Total\ Time = 2\ h + 1\ h\\Total\ Time = 3\ h[/tex]
Now, the average speed for the entire trip will be:
[tex]Average\ Speed = \frac{Total\ Distance}{Total\ Time}\\\\Average\ Speed =\frac{80\ mi}{3\ h}[/tex]
Average Speed = 26.67 mi/h
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The attached picture explains the concept of average speed.
An aircraft traveling at 600km/h accelerates steadily at 10km/h per second. Taking the speed of sounds as 1100km/h at the aircraft's altitude, how long will it take to reach the sound barrier.
Answer:
V2 - V1 = a t for uniformly accelerated motion
t = (V2 - V1) / a = (1100 -600) km/hr / 10 km/hr/sec
t = 500 / 10 sec = 50 sec
an astronaut on an eva has wandered dangerously far away from the shuttle. she has also exhausted all the fuel in her jet pack. how can she get back to the shuttle?
The conservation of the momentum allows to find the result of how the astronaut can return to the spacecraft is:
Throwing the thruster away from the ship.
The momentum is defined as the product of the mass and the velocity of the body, for isolated systems the momentum is conserved. If we define the system as consisting of the astronaut and the evo propellant, this system is isolated and the internal forces become zero. Let's find the moment in two moments.
Initial instant. Astronaut and thrust together.
p₀ = 0
Final moment. The astronaut now the thruster in the opposite direction of the ship.
[tex]m_f[/tex] = m v + M v '
where m is propellant mass and M the astronaut mass.
As the moment is preserved.
0 = m v + M v ’
v ’= [tex]- \frac{m}{M} \ v[/tex]
We can see that the astronaut's speed is in the opposite direction to the propeller, that is, in the direction of the ship.
The magnitude of the velocity is given by the relationship between the masses.
In conclusion, using the conservation of the momentun we can find the result of how the astronaut can return to the ship is:
Throwing the thruster away from the ship.
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Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.
a.
pitch
c.
scales
b.
overtones
d.
percussion
Answer:
overtones
Explanation:
What is downward force that acts on an airplane in flight
Answer:
重力
Explanation:
这是正确的答案还是不是
The horizontal surface on which the block of mass 2.2 kg slides is frictionless. The force of 27 N acts on the block in a horizontal direction and the force of 81 N acts on the block at an angle as shown below is the magnitude of the resulting ac celeration of the block? The acceleration of gravity is 9.8 m/s ^ 2
The magnitude of the resulting acceleration of the block is 6.14 m/s².
The given parameters;
mass of the block, m = 2.2 kghorizontal force on the block, F = 27 Nforce below the horizontal, 81 N at 60⁰The net horizontal force on the block is calculated as follows;
[tex]F_x = 27 \ - 81 \times cos (60)\\\\F_x = -13.5 \ N[/tex]
The acceleration of the block is calculated as follows;
[tex]a = \frac{-13.5}{2.2} \\\\a = - 6.14 \ m/s^2\\\\a = 6.14 \ m/s^2 \ to \ the \ left[/tex]
Thus, the magnitude of the resulting acceleration of the block is 6.14 m/s².
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Andy took a bus and then walked from his home to downtown. For the first 1.6 hour, the bus drove at an average speed of (15km)/(h). For the next 0.4 hours, he walked at an average speed of (4.5km)/(h). What was the average speed for the whole journey?
Answer:
240
Explanation:
Please help I’ll mark brainlyest
Answer:
10N right
Explanation:
The 10N of force acting down and up on the object cancel out.
The 15N of force pulling the force to the right is stronger than the 5N of force pulling the object left
15N - 5N = 10N
The magnitude and unit is 10N, and the direction is right
As shown in the diagram, an inflated balloon released from rest moves horizontally with velocity "v". The velocity of the balloon is most likely caused by ______
Answer:
Action reaction
Explanation:
Thus the response above is correct.
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Determine your mass in kg noting that 1 kg is about 2.2 lbs. Then use Fg = mg to find your weight in Newtons.
Answer: see example due to variation of factor
Explanation: w = m x g
Weight= Mass (in kg) x Gravity (9.8m/s)
To get to kg from lbs take your weight divide by 2.2lbs well get you to kg
Example
Let's say a boy weighs 145lbs
145kg/2.2lbs=66kg
Now we use the equation
w=m x g
65kg*9.81m/s=637.65N
A force unit is defined as the product of a mass unit and a unit of
acceleration.
time.
velocity.
displacement.
Answer:
A force unit is defined as the product of a mass unit and a unit of acceleration.
Answer:
Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object.
Explanation:
Force = M (Mass) * A (Acceleration)
The SI unit of Mass = KG
S.I. unit of acceleration is m/sec/sec = m/sec2
Hence, Unit of force is Kg m/Sec2
Since force is used so often, S. I. gives this unit a special name:
1 Newton = 1 kg m/sec2
If a plane travels 800 m south & 1500 m east, what is its distance &
displacement?
Answer:
2300 because 800 + 1500=2300
Gravitational potential energy is just one type of stored energy.
t or f??
Answer: true because potential energy is stored in a object
Explanation:
NEED HELP!!! IF YOU ANSWER ALL QUESTIONS I WILL GIVE YOU BRAINEST!!!!! 15 POINTS!!!!
1. Tracking your exercise can help you stick with an exercise routine.
A.
True
B.
False
2. Lola is trying to be healthier, so she has been doing a lot of weight lifting. She can tell that she is really starting to build more muscle. If she is working her muscles, does she need to be concerned about flexibility?
A.
No, any kind of muscle work gets the job done.
B.
Yes, it is best to do as many different kinds of exercise as possible.
C.
Yes, flexibility is a different and important way of working muscle.
D.
No, most people are naturally flexible without much additional work.
3. Many sports that do not explicitly depend on strength work weightlifting into their practices. Why is this a good idea?
A.
Weightlifting is a traditional form of exercise.
B.
Building muscle strength helps with all aspects of fitness.
C.
There are very few ways to build muscles other than weightlifting.
D.
Sports can change their rules and require more strength from athletes.
4. Marina comes from a family with a lot of heart disease. She knows that she will have to go out of her way to make sure that her heart stays strong and healthy. What would be the BEST exercise to achieve this goal?
A.
yoga
B.
bowling
C.
swimming
D.
weightlifting
PLEASE NO LINKS!!!
Answer:
1.A
2.C
3.B
4. i.dk about that one
Explanation:
1. It is true that Tracking your exercise can help you stick with an exercise routine.
2. Yes, it is best to do as many different kinds of exercise as possible.
3. Building muscle strength helps with all aspects of fitness
4. Yoga would be the best exercise to achieve this goal.
What is exercise?Exercise is any activity that utilizes the physical movements of the body that improves a people's health, endurance, and wellbeing while lowering their chance of contracting illnesses. It enables the person to keep their body weight in a healthy weight range.
The benefits of fitness fluctuate depending on the sort of dying a person experiences. Even if a muscle is stretched, excessive sitting can cause a number of illnesses, many of which are fatal. The individual should engage in mobility activities as well as exercising to improve their stamina.
Thus, exercise is very necessary for health.
To learn more about exercise here, refer to the link;
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1) how can you show that atmospheric exerts pressure?
2) how do you measure the volume of an irregular solid ? explain an experiment with diagram.
Answer:
1. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure.
2. Measure the volume of the liquid displaced when the object is submerged. Measure the initial volume of water in graduated cylinder. Submerge the irregular object. Measure the final volume of the water.
— The difference between the initial volume and the final volume is the volume of the object.
hope can help ^_^
Martine also has an eraser.it has a mass of 3g,and a volume if 1cm3.what is its density
Answer:
3g/cm³
Explanation:
Use the formula:
density = mass ÷ volume
Substitute (plug in) the values:
density = 3 ÷ 1 = 3g/cm³
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Biết V0=4m/s , a=1m/s , t=5s
Answer:
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