Answer:water
Explanation:
Water may be a nutrient that makes up 60% of our body weight. it's important in many functions, it's part of every cell in every tissue in the body.
Water carries other nutrients to all or any parts of the body, it carries waste out of the body and it helps to manage body temperature. When you run or play sports your body heats up pretty quickly.
Your body starts to sweat as a way to get rid of the heat. When the sweat evaporates on your skin your body and blood get cool. it's very important to replace the fluid that is lost by sweating so as not to become dehydrated.
If you get dehydrated the body cannot cool itself anymore and your performance will drop. Without enough water, whether you're exercising or sitting all day, you're at risk for dehydration which can be fatal
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Are there any exceptions to the rule that planets rotate with small axis tilts and in the same direction as they orbit the sun?.
Venus and Uranus are exception to these rules.
Venus rotates in the horizontal course when Uranus falls as it circles the solar on its aspect.Venus, like the different stars, at the beginning rotates anticlockwise however it nevertheless does.The exceptions are Venus and Uranus but they've what's called regressive rotation, rotating parallel to the solar's roster.
Uranus is the 7th planet from the sun. Its call is a connection with the Greek god of the sky, Uranus, who, in step with Greek mythology, turned into the exceptional-grandfather of Ares, grandfather of Zeus and father of Cronus. It has the third-largest planetary radius and fourth-largest planetary mass in the solar system.
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What is the velocity of a 1-kg ball that is dropped from a 50m height after free-falling
for 1 second?
Answer:
See below
Explanation:
Weight/mass of the object is irrelevant ( not needed)
v = at
= 9.81 m/s^2 * 1 s = 9.8 m/s
consider a large truck carrying a heavy load, such as steel beams. a significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. assume, for example, that a 11,000 kg load sits on the flat bed of a 15,000 kg truck moving at 16.0 m/s. assume that the load is not tied down to the truck, but has a coefficient of friction of 0.450 with the flat bed of the truck. (a) calculate the minimum stopping distance for the truck for which the load will not slide forward relative to the truck.
Answer:
WOW are you a cool women?
56.
A scientist is performing an experiment with an object falling in air. His hypothesis is that the time the object takes to fall will be directly proportional to the height from which the object is dropped; if this is true, a graph of fall time versus height will be a straight line. When he graphs his data, the graph is clearly curved, not a straight line. He decides that there must be an error in his measurements and concludes that the hypothesis should be accepted.
Explain how three of the four limitations of science apply to this experiment and to the scientist's conclusion.
The graphs of velocity vs time and acceleration versus time depict the motion of a falling object in a straight line.
The position-time graph depicts how the moving object's position has changed over time.
The displacement-time graph displays the position of the moving object over a time period. This graph shows how far the object has moved from its starting position over the course of time.The velocity-time graph demonstrates the speed of a moving item over a time period.The velocity-time graph, also known as an acceleration-time graph, displays how quickly a moving object changes its speed over time.With regard to the displacement-time graph of the velocity-time graph and the acceleration-time graph i.e. Only the velocity and acceleration of the falling object are depicted in these three graphs as straight lines.
Therefore, the graphs of velocity versus time and acceleration versus time represent the motion of a falling object on a straight line.
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5. A 10 kg mass is lifted to a height of 2 m. What is its potential energy at this position? Given Formula
Substitution Answer (with units)
The potential energy at this position is 196 joules.
What is potential energy ?
potential energy stored in energy that depends upon to the relative position of the various parts of a system. A spring has more potential energy when it is the compressed or stretched. A steel ball has more potential energy raised above the ground than it has the after falling to Earth.
Sol-
m=10kg h=2m Ep=mgh Ep=(10kg)(9.8 m/sec2)(2m)
Ep=196J.
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
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a car traveling at 27 m/s hits a tree. if the front end of the car is 1.2 meters, what is the acceleration rate of the car.
The acceleration rate of the car travelling at 27m/s in 1.2metres is 303.8m/s².
How to calculate acceleration?Acceleration of a body refers to the amount by which a speed or velocity increases. The acceleration of a moving body can be calculated using one of the equation of motion as follows:
v² = u² + 2as
Where;
v = final velocityu = initial velocitya = accelerations = distanceAccording to this question, a car traveling at 27 m/s hits a tree. if the front end of the car is 1.2 meters, the acceleration rate of the car can be calculated as follows:
27² = 0² + 2(a)(1.2)
729 = 2.4a
a = 303.8m/s²
Therefore, 303.8m/s² is the acceleration of the car.
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A can of bean rolls off a horizontal table with a velocity of 0.44 m/s. If the table is 0.95 meters high, how long did it take the can to hit the floor.
A ball, thrown upward, initially loses speed due to downward free-fall__________. At the top of it’s trajectory, it momentarily stops, then increases its speed as it descends. Throughout, its acceleration is ___________.
A ball, thrown upward, initially loses speed due to downward free-fall. At the top of it’s trajectory, it momentarily stops, then increases its speed as it descends. Throughout, its acceleration is (g)= 9.8 m/s²
What is acceleration?A particular object has changed its velocity in a particular time. That ratio called the acceleration of the object. Example: A car starts its journey from rest and ends at 25 m/s velocity in 5 second interval. So the acceleration is = 25/5 = 5m/s²
How can we calculate the acceleration of the ball?According to the definition of the acceleration due to gravity, Whenever a particle or a object throw upwards some amount of force attract that object at the center of the earth that is called the gravity. For this gravity that produce a acceleration due to gravity. The value of acceleration due to gravity is 9.8 m/s².
According to the question a ball is thrown upwards, initially loses speed due to downward free-fall. This case happens for the gravity.
At the top of it’s trajectory, it momentarily stops, then increases its speed as it descends. This also happens for the gravity cause the ball always attract the ball at the center of the earth.
For this attraction the acceleration due to gravity generated. So its acceleration throughout the case is same as the acceleration due to gravity, that means = 9.8 m/s².
According to the conversation, we can conclude that, Throughout, its acceleration is (g)= 9.8 m/s²
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the frictional force that holds an object in place is called ______ friction.
Static Friction is the force that holds the object in the place.
Static friction is the type of friction which acts on body and keep them at rest. Static friction opposes the relative motion and keep the object in a place. It acts tangentially to the surface.The friction forces are of two types, kinetic and static. Static keeps the object at rest and kinetic allows the object to move. Friction plays a major role in our day to day life, we can walk properly without sleeping because of friction only. Due to friction we can slide heavy objects easily on the floor. There are liquids and surfaces which increase or decrease friction according to our needs and are used by factories and companies to make their work easy. To know more about friction visit
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A stunt driver needs to drive off the roof of a 20 meter building. He can only reach 4 m/s on the roof. Where should we put the safety pad for him to land on?
A student rolls a ball along the floor so that the ball has a speed of 16m/s. What is the speed of the ball relative to a second student who is running at 6m/s in the same direction that the ball is rolling?
Answer:
on
Explanation:
when someone runs their hand is not really balanced when they wrote something
If a student rolls a ball along the floor so that the ball has a speed of 16 m / s , then the speed of the ball relative to a second student would be 10 m / s if the student is running at 6 m / s in the same direction that the ball is rolling.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity.
If a student rolls a ball across the floor at a speed of 16 meters per second, the ball's speed in relation to a second student would be 10 meters per second if the second student is sprinting at a speed of 6 meters per second in the same direction as the ball is rolling.
Thus, the relative speed of the ball with respect to the student would be 10 m / s.
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Suppose we look at a photograph of many galaxies. assuming that all galaxies formed at the same time after the big bang, which galaxy appears to us as the youngest?
The galaxy appears to us as the youngest is the one that is farthest away.
Basically, a galaxy can be characterized as a collection (bunch) of numerous billions of stars, that are existing autonomously or by themselves.One of the foremost imperative characteristics of a universe is that it comprises billions of stars with diverse ages, extending from the most youthful star to the oldest. , a star that's closest to mankind is the most seasoned whereas the one that's most remote absent is the youngest. While we assume that we look at a photograph of many galaxies. assuming that all galaxies formed at the same time after the big bang, So it can be concluded that the star that is the closest to us is the oldest one while the more distant star is the more youthful it is.
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2. The potential energy of an object depends on its _______.
Answer:
homboy it Position
Explanation:
Answer: i think position
Explanation:just thinking
A student uses a spring-loaded launcher to launch a marble vertically in the air. The mass of the marble is 0.003 kg and the spring constant is 220 N/m. What is the maximum height the marble can reach when compressed by 2 cm?
Maximum heigh: 1.496 m
(This number is not exacte I truncated it)
Explanation:
Data:
mass : m = 0.003 kg
spring constant : k = 220 N/m
amount of compression: x = 2 cm = 0.02 m
heigh : h = ?
accelaratiom due to gravity : g = 9.8ms^-2
Potential Energy : PE = ?
Since you'll be converting the PE to KE, you'll use 2 formulas.
Formulas:
[tex]PE=\frac{1}{2}\cdot k\cdot x^2[/tex][tex]PE_{\text{marble}}\text{ = }m\cdot g\cdot h_{}[/tex]Solution:
[tex]\begin{gathered} PE\text{ }=\text{ }\frac{220\cdot0.02^2}{2} \\ PE\text{ = }0.044\text{ J} \end{gathered}[/tex][tex]\begin{gathered} 0.044\text{ J =}m\cdot g\cdot h \\ 0.044\text{ = 0.003 }\cdot\text{ }9.8\cdot\text{ h} \\ h\text{ = }\frac{0.044}{0.003\cdot\text{ 9.8}} \\ h\text{ }\approx\text{ 1.496 m} \end{gathered}[/tex]In empty space, which quantity is always larger for x-ray radiation than for a radio wave?.
In empty space, the quantity is always larger for x-ray radiation than for a radio wave is frequency.
How does X-ray radiation work?X-rays are an electromagnetic radiation type that resembles visible light. However, x-rays have a higher energy than light and can penetrate most solid materials, including the human body. Images of the tissues and structures inside the body are created using medical x-rays.
The radiation you receive during an X-ray typically equals between a few days and a few years of exposure to naturally occurring radiation from the environment. The danger of developing cancer many years or decades after being exposed to X-rays exists, but it is regarded to be very low.
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A 1520 kg car accelerates at a rate of
1.50 m/s². What is the net force on the car?
Answer:
Your answer is F = 2280 N
Explanation:
The formula for force is [tex]F=ma[/tex]. Given this formula, [tex]1520[/tex] × [tex]1.5[/tex] [tex]= 2280[/tex]
A 969 n sky diver has opened his parachute to slow his descent to a constant speed the parachute applies 1,323 n of force. what deceleration does he experiences
Answer:
See below
Explanation:
Find mass of skydiver
F = mg
969 = m ( 9.81) so m = 98.8 kg
NET deccel force = 1323-969 = 354 N
F=ma
354 = 98.8 (a) = 3.58 m/s^2 decceleration
Determine the final speed of a proton that has an initial speed of 264 m/s and is then uniformly accelerated
in an electric field at the rate of -16 m/s² for 15 s.
A proton, a subatomic particle, is found in the nucleus of every atom. The electrical charge of the particle is positive and the opposite of the electron's. If a proton were isolated, it would weigh only 1.673 x 10-27 kilos, little less than a neutron.
We will alter our speed when we are already travelling and want to go faster or slower. This roughly sums up what acceleration is. However, acceleration is not merely a matter of changing speed. Acceleration actually refers to the change in speed per unit of time. So let's imagine we want to increase or decrease our speed at a set rate. Our acceleration will be greater the faster we move.
An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to the physical field surrounding a system of charged particles.
Using,
a = (Vf - Vi) / t
-16 m/s² = (Vf - 264) / 15
(-16 * 15)+264 = Vf
Vf = 24 m/s
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how would the accelerations you measured in this lab change if you were still moving the same small masses from one hanger to the other for each trial, but the total mass of the system was much larger? the measured accelerations would all be:
When the total mass of the system much larger then the measured accelerations would all be: halved.
In an Atwood's Machine, weight difference between the two hanging masses determines the net force acting on the system and this accelerates the hanging masses. Heavier mass is accelerated downward whereas the lighter mass is accelerated upward.
The second law states that the acceleration of an object depends on two variables that are: the net force acting on the object and the mass. The acceleration of an object depends directly on the net force acting on the object and inversely upon the mass.
F = m*a
Where, F denotes force, m is mass and a is acceleration. If force is doubled, acceleration also gets doubled whereas if the mass is doubled then acceleration becomes half.
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A circuit calls for a 0.600 mm -diameter copper wire to be stretched between two points. you don't have any copper wire, but you do have aluminum wire in a wide variety of diameters.
The diameter of the required aluminum wire in place of copper wire is 0.772 mm.
We know, the resistance of the wire is given by,
R = pL/A
Where,
R is resistance,
p is the resistivity of the material,
L so the length of the wire,
A is the area of the wire.
The resistivity p₁ of copper is 1.6 x 10⁻⁸Ω.
The resistivity p₂ of copper is 2.65 x 10⁻⁸Ω.
The length of both the copper as well as the aluminum wire is L.
Let us say the area of copper wire is A₁ and that of aluminum is A₂.
So, for same resistance,
p₁L/A₁ = p₂L/A₂
p₁/A₁ = p₂/A₂
Area = πD²/4
So, we can write,
p₁/D₁² = p₂/D₂²
Putting the values,
1.6 x 10⁻⁸/(0.6)² = 2.65 x 10⁻⁸/D²
D₂ = 0.772 mm.
The diameter of the aluminum wire required is 0.772mm.
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Complete Question - A circuit calls for a 0.500 mm-diameter copper wire to be stretched between two points. You don't have any copper wire, but you do have aluminum wire in a wide variety of diameters.
a) What diameter aluminum wire will provide the same resistance?
Use the information in the table to identify the metal with a volume of 1.375 cm3.
By using the information in the table (see attachment), the metal with a volume of 1.375 cm³ is zinc.
What is density?Density simply refers to a ratio of mass to the volume of a physical object such as a metal, gray cube, or tennis ball. Mathematically, the density of a physical object can be calculated by using this formula:
Density = M/V
Where:
M represents the mass of a physical substance or object.V represents the volume of a physical substance or object.Making volume the subject of formula, we have:
Volume = Mass/Density
For the metal aluminum, we have:
Volume = 4.60/2.70
Volume = 1.70 cm³.
For metal zinc, we have:
Volume = 9.81/7.13
Volume = 1.375 cm³.
For metal chromium, we have:
Volume = 6.24/6.18
Volume = 0.87 cm³.
For metal nickel, we have:
Volume = 3.17/8.90
Volume = 0.36 cm³.
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A ball of mass 15kg moving at 10m/s collides with another ball of equal mass at rest. If the two balls moves off together after impact , Caculate their common velocity
Their common velocity is 5m/s.
Given information,
Mass of ball 1 [m1] = 15 kg
Mass of ball 2 [m2] = 15 kg
Velocity of ball 1 [v1] = 10 m/s
Velocity of ball 2 [v2] = 0 m/s
Since, both the balls move off together they have a common velocity.
Let common velocity be v.
Using conservation of momentum, that is
Initial momentum = Final momentum
m1 x v1 + m2 x v1 = [m1 + m2] x v
15 x 10 + 15 x 0 = [15 + 15] x v
150 + 0 = 30v
150 = 30v
v = 5m/s.
∴ Their common velocity is 5m/s.
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The gravitational force beyween two objects is 2000 N. The mass of the objects is reduced to one-third of its original mass
Find the x and y-components of the vector vector a =(15 m/s^ 2, 39 left of -y axis)
The x and y components of the vector a = 15 m/s^2 and 39 left of y axis are -14.4, 3.99 m/s^2.
What is a vector and how it is calculated out to be so?In science we need a method to define both direction and magnitude, vector is one such method.In this question is given vector a = 15 m/s^2 , and is 39 left to the y axis , for calculating x and y component.To calculate the x component , = -asin39 degree = -15 x 0.96 = -14.4 m/s^2.To calculate the y component of the vector , = -a cos39 degree= -15 x 0.266 = -3.99 m/s^2.So the x and y component of the vector are -14.4 m/s^2 and 3.99 m/s^2 respectively.To know more about vector visit:
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A circuit with a battery, a 14 Ω resistor, and a 17 Ω resistor, in parallel. The total current is the system is 2.8 A. What is the voltage of the battery?
Given data:
* The total current in the system is I = 2.8 A.
* The resistance of resistors connected in parallel is,
[tex]\begin{gathered} R_1=14\text{ ohm} \\ R_2=17\text{ ohm} \end{gathered}[/tex]Solution:
The equivalent resistance of the system is,
[tex]\frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}[/tex]Substituting the known values,
[tex]\begin{gathered} \frac{1}{R_{eq}}=\frac{1}{14}+\frac{1}{17} \\ \frac{1}{R_{eq}}=\frac{17+14}{14\times17} \\ R_{eq}=\frac{14\times17}{17+14} \\ R_{eq}=7.68\text{ ohm} \end{gathered}[/tex]According to Ohm's law, the voltage across the battery in terms of the current and equivalent resistance is,
[tex]\begin{gathered} V=IR_{eq} \\ V=2.8\times7.68 \\ V=21.5\text{ volts} \end{gathered}[/tex]Thus, the voltage across the battery is 21.5 volts.
pleaseee help im struggling a lottt
Answer:
d=s/t
Explanation:
s=d/t
/t /t
s/t=d
Hope this helps
1. Think of an engineering problem where having an object with a high (k) value would be a benefit?
2. Think of an engineering problem where having an object with a low (k) value would be a benefit?
An example of a project where an object with a high (k) value would be a benefit is one that has to do with the design of a rocket engine. Metals that have very high thermal conductivity are useful for building rocket engines. This is because of the amount of energy/heat that is required to be combusted by these parts to achieve a break from the earth's force field of gravity.
While engineering problems where having an object with a low (k) value would be a benefit is those that have to do with buildings. Buildings are made from concrete and brisk with have low thermal conductivity hence low
What does (k) Value mean?A k-value (also known as a k-factor or lambda value) is a measure of a material's thermal conductivity, or how quickly heat moves through it. It is a basic quality that is independent of material quantities.
Thermal conductivities of different building materials may be compared using k-values. This is often useful in determining the possibility of heat transmission between the inside and exterior of a structure.
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two tugboats pull a disabled supertanker. each tug exerts a constant force of 1.20×106 nn , one at an angle 10.0 ∘∘ west of north, and the other at an angle 10.0 ∘∘ east of north, as they pull the tanker a distance 0.880 kmkm toward the north.
The ideas of vector components and the work done are relevant to this question.
The total work done by the two tugboats on the supertanker is "2.03 x 10⁹ J".
First, we will calculate the force in the direction of the displacement. It will be the sum of the x- vector components of both the forces:
Fx = Fx1 +Fx2
Fx = Fcosθ₁+Fcosθ₂
where,
F = magnitude of forces = 1.2 x 10⁶ N
θ₁ = angle of the first boat with horizontal = 10°
θ₂ = angle of the second boat with horizontal = 10°
Therefore,
Fx=2(1.2 x 10⁶) (cos10)
Fx=2,361,600
Now, we will calculate the work done by the tugboats:
Work done = Fx × d
W = 2,316,600×880
W=2.03 x 10⁹ J
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what true airspeed and angle of attack should be used to generate the same amount of lift as altitude is increased?
According to the given statement A higher true airspeed for any given angle of attack.
How do you determine angle of attack?The angle between both the wing and the direction of flight is known as the angle of attack. The angles of attack is also the angle between both the wing and the relative wind since the direction of flight is the opposite of the airflow.
What is the best angle of attack?The ideal launch angle is dependent on ball speed, according to physics. The ideal launch angle is around 15 degrees at ball velocities typical of most amateur players. The average launch angle of PGA Tour golfers is just over 11 degrees because to their faster ball speed.
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I honestly don't know how to answer the last part of this question, it makes no sense to me:
A SR-71 reconnaissance aircraft, the world's fastest aircraft, is flying east at 3000 km/h. If the plane encounters a cross-wind of 300 km/h that is directed to the north,what is the magnitude and direction of its resultant velocity? If the border is a straight north/southline, will it take more, less or the same time to reach the eastern border of the country with the cross wind vs. without the crosswind? Explain
The resultant velocity of the aircraft is 3015 Km/hr while the direction is 5.7 degrees North of east
What is the resultant velocity?The resultant vector is that vector that has the same effect is magnitude and direction as the two vectors acting together. Recall that velocity is a vector quantity. This implies that the magnitude and the direction of the velocity is very important.
The resultant velocity would now be obtained by considering the directions of the two velocities hence we have to work geometrically and not algebraically. We have to know that the plane is flying east at 3000 km/h. If the plane encounters a cross-wind of 300 km/h that is directed to the north
Thus the resultant velocity is;
R = √(3000)^2 + (300)^2
R = √9 * 10^6 + 9 * 10^4
R = 3015 Km/hr
The direction of this resultant velocity is;
Tan-1 (300/3000)
= 5.7 degrees North of east
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