Answer:
approx. 2.21
Explanation:
5.3/2.4 = 2.208
How did life evolve from nonliving matter?
Answer: it is proposes that in Earth's prebiotic history, simple organic matter was exposed to energy in the form of volcanoes and electrical storms
Explanation:
Help This is Urgent
You are traveling at 25 meters per minute North on your Super Scooter. It takes you 90 minutes to reach your destination. How far did you travel?
Question 1 options:
2250 m/m
36 m/m
2250 m/m North
36 m/m North
9514 1404 393
Answer:
2250 m North
Explanation:
distance = velocity × time
= (25 m/min North)(90 min) = 25×90 m North = 2250 m North
_____
We're not sure what the m/m units are supposed to be in the answer choices. The displacement is measured in meters. The time units cancel when you multiply velocity by time.
__
The question "how far" is somewhat ambiguous in this context. It might refer to the distance only (2250 m), or it might refer to the distance in a particular direction (2250 m North).
If we ignore air resistance (as we normally do) and launch a projectile at an angle between zero and 90o, how does the magnitude (size) of the vertical component of the velocity change as time elapses? Group of answer choices
Answer:
First, remember that:
Acceleration = dV/dt
where V is velocity and t is time.
When you launch a projectile (θ between 0° and 90° means that you are not launching it into the ground) you are applying an initial velocity v0, that can be separated in components, where the vertical component will be:
v0*sin(v)
That initial vertical velocity is a constant, so it does not depend on time.
Then when we differentiate with respect to the time, that constant will vanish, and we will get:
rate of change of the vertical velocity = vertical acceleration.
And as you know, when we ignore the air resistance the only force acting on the vertical axis is the gravitational force, such that the vertical acceleration will be:
a(t) = -9.8m/s^2
Where the negative sign is because this force points down.
Then the rate of change of the vertical velocity will be exactly that, -9.8m/s^2.
And the vertical velocity equation, to see exactly how the vertical velocity depends on time, will be:
V(t) = (-9.8m/s^2)*t + v0*sin(θ)
What is the work required to lift a 10 kg box off the ground to a height of
5.0 m?
Answer:
490J
Explanation:
Given parameters:
Mass of box = 10kg
Height = 5m
Unknown:
Work done = ?
Solution:
Work done can be derived from the product of force and distance;
Work done = force x distance
Force here is applied by gravity and it is the weight
The distance is the height
Work done = weight x height
Work done = mass x acceleration due to gravity x height
Work done = 10 x 9.8 x 5 = 490J
1. A 55 kg man runs up the stairs below in 5 seconds. How many watts of power did he use?
2. A 55 kg man runs up the stairs below in 5 seconds. How can he reduce the power he uses?
Answer:
Explanation:
Power = Force * distance/time
Given
mass = 55kg
Force = 55 * 10 = 550N
Let the distance covered be 8m
time taken = 5secs
Required
Amount of Power used
Power = 550 * 8/5
Power = 110 * 8
Power = 880 Watts
2) The way he can reduce the amount of power expended is to reduce the amount of stairs or the distance covered in a specified period of time.
An object accelerates from rest and travels 53 m west in 5.2 s. Determine the acceleration
of the object
Answer:
20.4m/s²
Explanation:
Given parameters:
Initial velocity = 0m/s
Distance = 53m
Time = 5.2s
Unknown:
Acceleration = ?
Solution:
This is a linear motion and we use the right motion equation;
S = ut + [tex]\frac{1}{2}[/tex]at²
S is the distance
u is the initial velocity
a is the acceleration
t is the time
Insert the parameters and solve;
53 = (0x 5.2) + [tex]\frac{1}{2}[/tex] x a x 5.2
53 = 2.6a
a = [tex]\frac{53}{2.6}[/tex] = 20.4m/s²
Which list correctly names the three types of galaxies?
1.binary, open, globular
2.elliptical, open, binary
3.irregular, spiral, elliptical
4.open, irregular, spiral
Answer:
3.irregular, spiral, elliptical
Irregular, spiral and elliptical are the three types of galaxies present.
What is the Galaxy?Huge collection of billions of stars along with their solar systems, gas and dust is termed as the galaxy.Gravity holds the galaxy together.
Types of galaxies:
Spiral: These are the galaxies with the spiral shape and curved arms.Elliptical: These are the smooth and oval shaped galaxies.Irregular: These galaxies are neither spiral nor elliptical but they look like blobs.Therefore, irregular, spiral, and elliptical are the three types of galaxies present.
Hence, option (3) is correct.
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A cupboard is placed in front of a heater. Air can move through a gap under the cupboard.
Which row describes the temperature, and the direction of movement, of the air in the gap?
air temperature
air direction
A
cool
away from the heater
B
cool
towards the heater
C
warm
away from the heater
D
warm
towards the heater
Answer:
B
Explanation:
A cupboard is placed in front of a heater. Air can move through a gap under the cupboard will cool towards the heater.
What is heater?A heater is a device for supplying heat, for example a radiator or a convector. These water heaters heat water only when it is needed. Turn on the heater and the interior of the car will soon warm up. A heater is a device for supplying heat, for example a radiator or a convector.
A cupboard is placed in front of a heater. Air can move through a gap under the cupboard. The temperature, and the direction of movement, of the air in the gap under the cupboard will cool towards the heater.
A cupboard is placed in front of a heater. Air can move through a gap under the cupboard will cool towards the heater.
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Un avión sale de Bs. As. Con destino a Madrid distante 10000 Km y con una V= 800 Km/h y MRU. A la misma hora sale de Madrid hacia Bs. As. Otro avión con V= 1200 Km/h. Calcula el tiempo de encuentro y la distancia de cada uno en que se encuentran.
Answer:
Los aviones se encuentran a las 5 horas a una distancia de 4000 kilómetros desde Buenos Aires.
Explanation:
Asumimos que Buenos Aires y Madrid están en las posiciones [tex]x = 0\,km[/tex] y [tex]x = 10000\,km[/tex], respectivamente. También conocemos por el enunciado que ambos aviones experimentan un Movimiento Rectilíneo Uniforme. Las ecuaciones cinemáticas de cada avión son las siguientes:
Buenos Aires - Madrid
[tex]x_{A} = x_{A'}+v_{A}\cdot t[/tex] (1)
Madrid - Buenos Aires
[tex]x_{B} = x_{B'} + v_{B}\cdot t[/tex] (2)
Donde:
[tex]x_{A'}[/tex], [tex]x_{B'}[/tex] - Posiciones iniciales de los aviones, medidas en kilómetros.
[tex]x_{A}[/tex], [tex]x_{B}[/tex] - Posiciones finales de los aviones, medidas en kilómetros.
[tex]v_{A}[/tex], [tex]v_{B}[/tex] - Velocidades de los aviones, medidas en kilómetros por hora.
[tex]t[/tex] - Tiempo, medido en horas.
Si sabemos que [tex]x_{A'} = 0\,km[/tex], [tex]x_{B'} = 10000\,km[/tex], [tex]v_{A} = 800\,\frac{km}{h}[/tex], [tex]v_{B} = -1200\,\frac{km}{h}[/tex] y [tex]x_{A} = x_{B}[/tex], entonces obtenemos la siguiente fórmula:
[tex]0+800\cdot t = 10000-1200\cdot t[/tex] (3)
[tex]2000\cdot t = 10000[/tex]
[tex]t = 5\,h[/tex]
Ahora obtenemos la posición en la que se encuentran ambos aviones al sustituir los valores conocidos en (1):
[tex]x_{A} = 0+800\cdot (5)[/tex]
[tex]x_{A} = 4000\,km[/tex]
Los aviones se encuentran a las 5 horas a una distancia de 4000 kilómetros desde Buenos Aires.
If the mass of Earth increased, with no change in radius, your weight
would
Answer:
Increase
Explanation:
If the mass of the earth increase, with no change in radius, one's weight would also increase considerably.
The reason for this is that, the gravitational force of attraction between the two bodies will increase.
The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. So, increasing the mass of the earth will increase the gravitational force on one's body and hence, an increase in weight.please help:(
an objects motion will change only if a(n) ____ force acts on the object
_____ force is the combination of all the forces acting on an object
Answer: 1. A Unbalanced force and net force
Explanation:
The combination of all forces acting on a object is called a Net Force, and a Unbalanced force can cause an object to stop, start moving or change direction.
if the octupus had twelve arms then how many arms would the crab have show your work
Answer:
I believe that the crab would have 14 arms if the octopus had 12 arms
Explanation:
In projectile mtion, what is the x-component of the initial velocity? if V= Vi = 100 m/s and the angle with horizontal axis Θ = 60 degrees
Answer:
???????????????????????
Explanation:
The x - component of the initial velocity is given as:
Ux = Vi cos theta
Ux = 100cos 60
Ux = 50m/s
True or false MRI scans, X rays, and tomography help doctors see bones inside a persons body?
What happens to the gravitational force between two objects as the objects move closer together?
Answer:
The Gravity gets stronger
Explanation:
Newtons laws of motion.
If we shake the branches of a tree, the fruits fall
Answer:
When a branch of a tree is shaken, some of the fruits may fall down. Why? Solution : The fruits fall down due to inertia of rest.
Answer:
I HOPE IT WILL HELP YOU A LOT....
How fast is it moving after 1.00 s
Answer:3
Explanation:
A school bus traveling at 12 m/s has a momentum of 144,000 kg.m/s. What is the mass of the bus?
The mass is 12,000
144,000 divided by 12 = 12,000
Momentum = mass × velocity
Which statement accurately describes the relationship between weight and
mass?
A. Mass is an object's weight multiplied by its diameter.
B. Weight is an object's mass multiplied by its diameter.
C. Mass is an object's weight multiplied by the amount of
gravitational force acting on that object.
O D. Weight is an object's mass multiplied by the amount of
gravitational force acting on that object.
Answer:
D. Weight is an object's mass multiplied by the amount of
gravitational force acting on that object.
Explanation:
I got it right on the test
Weight is an object's mass multiplied by the amount of gravitational acceleration acting on that object. Hence, option (D) is correct.
What are mass and weight?The most fundamental characteristic of matter is its mass, which is one of the fundamental physical quantities. Mass is a term used to describe how much matter is there in a body. The kilograms is the SI unit of mass.
The amount of a body's weight indicates how much gravity is pulling on it. The weight formula is as follows: w = mg Since weight is a force, it has the same SI unit as a force, which is the Newton.
When we look at how weight is expressed, we can see that it depends on both mass and the acceleration caused by gravity. Hence, weight is an object's mass multiplied by the amount of gravitational acceleration acting on that object.
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The elements in a column of the periodic table _____.
A.have very similar chemical symbols
B.have the same atomic mass
C.have similar properties
How does La Niña affect the climate of the Pacific Ocean?
The ocean becomes cooler.
The warm water moves toward the east.
The cold water sinks deeper into the ocean.
The strength of the prevailing winds decreases.
Answer:
The ocean becomes cooler
Explanation:
La Niña is a phase of a natural climate pattern which occurs across the tropical Pacific Ocean and swings back and forth every 3 - 7 years on the average.
Now, during La Niña, the surface winds across the entire tropical Pacific Ocean are usually stronger than they are on the average, and in return most of the tropical Pacific Ocean will become cooler than they are on average.
Thus, looking at the given options, the correct one is;
The ocean becomes cooler
The way in which La Niña affects the climate of the Pacific Ocean is that: A. The ocean becomes cooler.
La Niña is a complex oceanic and atmospheric phenomenon that occur due to variations in ocean temperatures across the equatorial band of the Pacific Ocean, at a specific period of time in years. Also, it is a colder part of the El Niño-Southern oscillation climate pattern.
Basically, La Niña causes the surface winds blowing across the equatorial band of the Pacific Ocean to be stronger while reducing tropical cyclogenesis. Consequently, this causes the climate of the Pacific Ocean to become cooler.
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Crate is being pushed a constant velocity. What forces are being used?
Which energy transformation pops the corn kernels
Answer:
heat?
Explanation:
what is the speed of an object that travels 188m in 52 seconds
Answer:
3.6
Explanation:
plz mark brainliest | (• ◡•)|
to keep the blood flowing and bring energy
When you exercise, you need
to the large muscles groups.
glucose
dopamine
water
oxygen
Answer:
Glucose
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Which of the following has a positive charge and a mass of one?
a
electron
b
proton
c
element
d
positivon
e
neutron
Answer:
the answer is protons b
Explanation:
brainliest if 1st one..
( ANSWER QUICK PLS NEED FAST ) What is the opposite force to pushing off the ground to jump?
A The ground pushing off your foot
B The ground pulling your foot down
C Gravity pulling your foot down
D Your leg pushing off your foot
ANSWER
A)
Explanation:
Due to normal force from ground
Answer:The ground pushing off your foot
Explanation:
what is binary fission
what is metabolism
Answer:
Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the original. The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts.
Metabolism is the set of life-sustaining chemical reactions in organisms. The three main purposes of metabolism are: the conversion of food to energy to run cellular processes; the conversion of food/fuel ...
Explanation:
The old force goes from 10N to 2N while you double each of the masses. What happened to displacement?
Answer:
5n
Explanation:
10n divided by 2n is 5n
A negative body image can affect your fitness because being healthy asks you to keep
up a positive attitude and make smart choices.
O True
O False
Answer:
True
Explanation:
because if your body image is negative your holistic health is will affect
