Answer:
Machines are faster and more efficent
Explanation:
Answer: Machines makes work easier and save some time and is very fast. For example, an elder can't walk or stand very long, so people made a motorized wheelchair!
Explanation:
What is the SPEED of a ball that travels 120 m in 6s?
Answer:
20m/second
Explanation:
The reason the answer is 20m/second is because to find the speed of the ball in this question you have to divide the distance over the time giving you the result of 20m/second
Suggest a measure that a government can take to reduce a country's energy use
Answer:
Using alternative sources of energy like solar power,wind powermake aware people about using less energyconduct more hydroelectricity projectsWhy are body senses in psychology?
Answer: Body senses provide you with information about the position of your body in respect to your environment. The four main ones are touch, pain, vestibular, and kinesthesis.
More in details:
Our senses allow us to experience the world we live in, and are one of the key components of consciousness. ... This is why the study of our senses, or sensation, is considered to be such an important area of psychology, because it is one of the key components that makes consciousness possible.
A person, of weight mg, is standing on a scale in an elevator. What will the
scale read when the elevator accelerates upward?
A. More than mg
B. Less than mg
C. Equal to mg
D. Cannot tell what the scale will read.
more than mg
Explanation:
the pressure
The SI unit of measurement for mass is the
Answer:
m/s is answer for your questions
How do the echoes of the sounds of animals help them?
Answer:
Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting in various environments.
how does the electric force between two charged particles change if the distance between them is decreased by a factor of 3?
Answer:
F' = 9F
Explanation:
The electric force between charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
It means,
[tex]F\propto \dfrac{1}{r^2}[/tex]
If distance decreased by a factor of 3, r' = r/3
Net force will become,
[tex]F'=\dfrac{kq_1q_2}{r'^2}\\\\=\dfrac{kq_1q_2}{(\dfrac{r}{3})^2}\\\\=9\dfrac{kq_1q_2}{r^2}\\\\=9\times F[/tex]
It means new force will become 9 times that of the initial force.
Answer:
it is increased by a factor of 9
Explanation:
just took the test
In calisthenics, the resistance is ultimately provided by __________. A. free weights B. springs and elastic bands C. gravity D. weight machines
When practicing calisthenics, the athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_. Option C is correct.
---------------------
Calisthenic is a physical discipline that is based only on the use of body weight.
It is a training system with physical activities that do not require any external element (weights, balls, cord). Gravity is the only force that exerts resistance.
This discipline develops strength, precision, and movement coordination, which are fundamental to increasing the difficulty of the exercises.
The athlete's body is the only element that offers resistance. Thus, the resistance is ultimately provided by _gravity_.
------------------------------
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Answer:
C
Explanation:
A skateboarder is trying to skate horizontally off a building and jump over a pool as shown! The pool is 25.0m wide and the roof of the building is 32.0m above where he will land. Neglect drag.
How long will the skateboarder remain in the air?
With what initial speed (in given units) does the skateboarder need to barely clear the pool?
Would the skateboarder clear the pool if he skated off the building with an initial speed of 27mph?
Answer:
a) t = 2.55s
b) [tex]v_{0x} = 9.80 m/s[/tex]
c) yes
Explanation:
In order to solve this problem, we can start by drawing a sketch of the situation so we can better visualize what the problem is about (see attached picture).
a)
For the first question. We are talking about a movement in two dimensions. So on the first question they are asking us for vertical movement. It will be uniformly accelerated, so we can use the following formula:
[tex]y_{f}=y_{0}+V_{0y}t+\frac{1}{2}at^{2}[/tex]
We know the following:
[tex]y_{f}=0[/tex]
[tex]y_{0} = 32m[/tex]
[tex]V_{0y}=0[/tex]
t=?
[tex]a=-9.81 m/s ^{2}[/tex]
With this data, we can simplify our equation, so we end up with:
[tex]y_{0}+\frac{1}{2}at^{2}=0[/tex]
so we can now substitute the data we know and solve for t:
[tex]32m-\frac{1}{2}(9.81 m/s^{2})t^{2}=0[/tex]
[tex](-4.905 m/s^{2})t^{2}=-32m[/tex]
[tex]t^{2} = \frac{-32m}{-4.905 m/s^{2}}[/tex]
[tex]t=\sqrt{6.52s^{2}}[/tex]
t = 2.55 s
b)
For part b, since we are talking about horizontal movement and we are neglecting drag, this means that his horizontal speed will be constant. So we can use the following formula:
[tex]V_{x}=\frac{x}{t}[/tex]
we know he most move a horizontal distance of 25 meters in a time of 2.55s so we get:
[tex]V_{x} = \frac{25m}{2.55s}[/tex]
[tex]V_{x}=9.80 m/s[/tex]
c) for part c, we can do the conversion between miles per hour to meters per second like this:
[tex]\frac{27mi}{1hr}*\frac{1hr}{3600s}*\frac{5280ft}{1mi}*\frac{0.3048m}{1ft}[/tex]
so the given initial speed is equivalent to:
12.07 m/s
this is greater than the minimum 9.80 m/s we need, so the skater will clear the pool at this speed.
(a) The time spent in air by the skateboarder is 2.56 s
(b) The initial speed needed by the skateboarder to clear the pool is 9.77 m/s.
(c) The skateboarder with given initial speed of 27 mph will clear the pool since it is greater than minimum initial velocity required.
The given parameters;
width of the pool, d= 25 mheight of the building, h = 32 mThe time spent in air by the skateboarder is calculated as follows;
[tex]h = v_0t + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\gt^2 = 2h\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 32}{9.8} } \\\\t =2.56 \ s[/tex]
The initial speed needed by the skateboarder to clear the pool is calculated as;
[tex]v = \frac{d}{t} \\\\v = \frac{25}{2.56} \\\\v = 9.77 \ m/s[/tex]
The initial speed of the skateboarder is m/s;
[tex]27 \ \frac{mile}{hour} \times \frac{1609.3 \ m}{1 \ mile} \times \frac{1 \ hr}{3600 \ s} = 12.07 \ m/s[/tex]
Thus, the skateboarder with given initial speed of 27 mph will clear the pool since it is greater than minimum initial velocity required.
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One of the largest pipe organs is in the auditorium organ in the Fox Theatre. The pipe is 32 ft. Long and produces a sound with a wavelength of about 8.8m. If the speed of sound in air is 346 m/s what is the frequency of this sound? What is the period? Show all work and explain your answer.
Explanation:
length of pipe= 32 ft
wavelength of wave λ= 8.8 m
let f be frequency
we know velocity of wave v=λf
therefore, f=v/λ = 346/8.8 = 39.31 per second or hertz
time period = 1/f = 1/39.31 = 0.02543 seconds
The frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.
What is the frequency?Frequency is defined as the number of repetitions of waves occurring in 1 second. Frequency is also defined as the number of cycles completed in 1 second. SI unit of frequency is Hz.
The given data in the problem is;
L is the length of pipe= 32 ft
λ is the wavelength of wave= 8.8 m
f is the frequency=?
T is the time period=?
The frequency is fine as the ratio of the speed of wave and wavelength.,
[tex]\rm f= \frac{v}{\lambda} \\\\ \rm f= \frac{346}{8.8}\\\\ \rm f= 39.31 \ Hz[/tex]
The time period is guven as the inverse of the time period.
[tex]\rm T = \frac{1}{f} \\\\ \rm T = \frac{1}{39.31} \\\\ \rm T = 0.02543\ sec[/tex]
Hence the frequency of this sound will be 39.31-sec⁻¹or Hz. While the time period will be 0.02543 sec.
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Calcula cuantos protones debes reunir para que su masa sea igual a 1kg
Answer:
Para que la masa del proton sea 1 kg se requieren alrededor de 6x10²⁶ protones.
Explanation:
Sabiendo que la masa del proton es:
[tex]m_{p} = 1,67 \cdot 10^{-27} kg[/tex]
Entonces para que la masa sea 1 kg tenemos:
[tex] 1 kg = N*m_{p} [/tex]
En donde N es el número de protones.
[tex]N = \frac{1 kg}{1,67 \cdot 10^{-27} kg} = 6 \cdot 10^{26}[/tex]
Por lo tanto, para que la masa del proton sea 1 kg se requieren alrededor de 6x10²⁶ protones.
Espero que te sea de utilidad!
A baseball is thrown at an angle of 22◦ relative to the ground at a speed of 24.8 m/s. The ball is caught 43.5518 m from the thrower. The acceleration due to gravity is 9.81 m/s^2
How long is it in the air?
Answer in units of s.
How high is the tallest spot in the ball’s path?
Answer in units of m
Answer:
12 seconds in the air
2.5
very high
132
Explanation:
A car traveling at 50 m/s comes to a stop in 5 seconds. What is the
acceleration of this car?
Answer:10
Explanation:
You have to do speed divided by time so your answers 10
why is it important to include variety in your workouts
Explanation:
Variety in to an exercise program allows the body to adapt to many demands, from high intensity exercise to slow, steady state exercise. Variety is important in a fitness program because it allows for your body to be challenged on a consistent basis and to overcome a plateau.
B. A car is moving 4.0 m/s to the right. The car begins to accelerate at a rate of 1.5 m/s/s, to the right. After
10 seconds, what will be the velocity of the car? For credit, show work in detail
Which of the following is extrusive? Lava, Magma, Laccolith, Batholith.
Answer:
lava
Explanation:
Which statements about carbon-14 dating are true? Check all that apply. Carbon-14 decays into nitrogen-14. Carbon-14 has a longer half-life than potassium-40. Once a living thing dies, it no longer takes in carbon. Carbon-14 dating is used to date very old volcanic rock. Carbon-14 dating works for fossils as old as 50,000 years.
Answer:
135
Explanation:
What is the value of x in the equation 8+ 4 = 2 (x-1)
Answer:
mgi
Explanation:
Answer: x = 7
Explanation: 12 = 14 -2 = 12.
Read the passage. Then write a paragraph that explains why the two ecosystems have such different kinds of plants. Use the terms biotic factor, abiotic factor , and limiting factor in your explanation.
Answer:search this up but put quizzlet at the end it should be there
Explanation:
John is a runner. He runs the 100m sprint in 10.6s. What speed did he travel at? (in m/s)
The answer you are looking for is approximately 9.4 m/s.
Solution/Explanation:
First, writing out the formula for the speed of an object, encompassing distance and time, in meters per second, or m/s,
S=D/T.
"S" stands for "Speed."
"D" stands for "Distance."
"T" stands for "Time."
Speed (S)=????
Distance (D)=100m.
Time (T)=10.6s.
Substituting the given values of the variables,
S=100m/10.6s.
100÷10.6=9.43396226415≈9.4.
So, therefore, the final answer is approximately 9.4 m/s.
I hope that this has helped answer your question. Good day to you.
The table shows the diameter of four different types of electric wire....
Answer:
it is the fourth one!
Explanation:
i just did it on ap3x :)
The resistance of a wire which is used to power clothes dryer rank third as the area and diameter of wire is inversely proportional to the resistance of the wire. Thus, the correct option is A.
What is Electrical resistance?Electrical resistance is a measure of the opposition or friction to the current flow in an electrical circuit. Resistance is measured in the unit of ohms, that is symbolized by omega (Ω). Resistance of an electrical wire can be calculated by the formula:
R = (ρ×L)/A
where, R = Resistance of the wire,
ρ = Resistivity or specific resistance,
L = length of the electrical length,
A = Cross-sectional area of the electrical wire.
The resistance of a electrical conductor is dependent on the following factors including the cross-sectional area of the conductor, length of the conductor and the material of the electrical conductor.
Therefore, the correct option is A.
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how can i stop loveing you if yo keep saying the things i want to hear
Answer:
....
Explanation:
Answer:
What do you mean.
Explanation:
How much longer would it take to travel a
distance of 600 km at a speed of 50 kmhr-1
than it would at a speed of 60 kmhr-1?
Explanation:
Time=distance/speed
=600/50
=12
=600/60=10
==12-10=2 hours
How would the future of the universe differ from the past?
100 points to whoever can help, please
A 52-kg snow skier is at the top of a 245-m-high hill. After she has gone down a vertical distance of 112 m, what is her total energy?
a. 125 kJ
b. 1430 kJ
Selected: c. 570 kJThis answer is incorrect.
d. 13 kJ
Answer:
A) 1.2x10^5 J
Explanation:
Kathy had a heavy metal ball and Rich had a light wooden ball they drop the balls from the same height. they were surprised to discover that the two balls reach the ground at the same time. this is what they said after the balls landed select who you agree with. Kathy said ""the force of gravity must be acting the same on both balls."" Rich said ""I don’t agree the metal ball weighs more so the force of gravity is more on the heavier ball.""explain why you agree with who you choose
Answer: I scored a 9/10
Explanation:
I agree with Kathy gravity must be acting the same on both balls just because one ball is heavier doesn’t mean they will hit different times if the wooden ball was drop closer to the ground then the wooden ball would hit the ground first
What is the voltage required to move 3A through three resistors (2ohms, 3ohms & 5ohms)?
A dog walks a distace of 100 ft in 20 s of time. What is the dogs speed in feet per second
Answer:
5 sec
Explanation:
How does the potential and kinetic energy change as the sled moves down the slope?
Answer:
KE increases and PE decreases.
Explanation:
First, note that the formula for kinetic energy is KE = (1/2)mv^2 where m is the mass and v is the velocity and the formula for potential energy is PE = mgh where h is the height it is at. Since mass and the acceleration provided by gravity doesn’t change, we can disclude that our conclusion. We know that the height (h) and velocity (v) does change, so let’s look at that. As you continue down the slope, you accelerate due to gravity. Thus, velocity increases and KE increases. As you continue down the slope, you get closer to the ground, hence h decreases and PE decreases.
I hope this helped! :)
what makes an molecule compound
Explanation:
A molecule is a group two or more atoms held together by chemical bonds.