Answer:
1.8 secs
Explanation:
u= 0
v= 18m/s^2
t= ?
v= u +at
18= 0 + 10×t
18= 10t
t= 18/10
t= 1.8 secs
Hence it will take the ball 1.8 secs to reach the ground
PLEASE ANSWER AS FAST AS YOU CAN How would an observer on train A, which is moving close to the speed of light, view a clock in train B, which is stationary at the train station
A. the clock in train B appears to be the same width and to run at the same rate.
B. the clock in train B appears narrower and runs faster
C. the clock in train B appears narrower and runs more slowly
D. the clock in train B appears wider and runs more slowly
Answer:
If the trains are moving at the same speed, the answer is A.
The clock in train B appears to be the same width and to run at the same rate. Option A is correct.
It is given that an observer on train A, which is moving close to the speed of light, views a clock in train B, which is stationary at the train station.
It is required to find how an observer would observe a clock in train B.
What would an observer on train A, which is in motion, view a clock in train B?If a person is in a moving train, then his body is also in a state of motion with respect to the train at the same rate. When the observer observes any object that is at rest then it does not change the shape or size of an object. Also an object appears to run a=t the same rate due to the relative velocity attain by the observer's train.
Relative Motion is
Relative motion is the speed or the motion of an object with respect to the moving or the stationary object.
Thus the clock in train B appears to be the same width and to run at the same rate.
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A cart, starting from rest, rolls across the floor for 0.5s. It accelerates at 4.2 m/s2. How far did it roll?
Answer:I need this answer tooooo
Explanation:
A wagon with a weight of 300 N is accelerated across a level surface at 0.5 m/s2. What is the net force on the wagon?
Answer:
I believe it is 600.
Explanation:
300 divided by 0.5
(I am so sorry if this is wrong, I am currently learning the same thing.)
An object that is moving can be in equilibrium.
O True
O False
Answer:
i think its false
Explanation:
A zero acceleration is the fundamental characteristic of an object in equilibrium.
Answer:
True
Explanation:
If its moving at a constant velocity its acceleration is zero. An zero acceleration is the the fundamental characteristic of an object in equilibrium
Imagine two of the exact same shopping carts being pushed across the grocery store with the exact same amount of force. The two shopping carts are released simultaneously. They both keep going for a short distance. One of them moves with a greater acceleration than the other. Since they are the exact same cart and are pushed with the exact same force, which statement below describes a scenario in which it would be possible for one of them to have greater acceleration.
Group of answer choices
Answer: The mass of the carts is different.
Explanation: If the mass of the cart is less, it is able to be pushed further out because it weighs less which causes it to gain acceleration while the other cart could have a greater mass and its weight would cause it to slow down. Hope this helps! :).
Most car engines have air cooling systems. True or False.
Answer:
true
hopefully, it's right
Answer:
true
Explanation:
hopefully this is what you needed
X-Rays are high energy light waves. True or false?
pls help!!!!!
Answer:
false
Explanation:
X-radiation, is a penetrating form of high-energy electromagnetic radiation.
A projectile is launched at an angle of 45 degrees with a velocity of 250 m/s. If air resistance is neglected, the magnitude of the horizontal velocity of the projectile at the time it reaches maximum altitude is equal to
Answer:
The horizontal velocity of the projectile at the time it reaches maximum altitude approximately equal to 131.331 meters per second.
Explanation:
From Mechanical Physics we understand that projectile motion is the combination of a horizontal motion at constant velocity and a vertical uniform accelerated motion due to gravity. Then, the horizontal velocity of the projectile ([tex]v_{x}[/tex]), measured in meters per second, remains constant during motion. That is:
[tex]v_{x} = v_{o}\cdot \cos \theta[/tex] (Eq. 1)
Where:
[tex]v_{o}[/tex] - Initial velocity of the projectile, measured in meters per second.
[tex]\theta[/tex] - Launch angle above the horizontal, measured in sexagesimal degrees.
If we know that [tex]v_{o} = 250\,\frac{m}{s}[/tex] and [tex]\theta = 45^{\circ}[/tex], then horizontal velocity of the projectile at the time it reaches maximum altitude is:
[tex]v_{x} = \left(250\,\frac{m}{s} \right)\cdot \cos 45^{\circ}[/tex]
[tex]v_{x} \approx 131.331\,\frac{m}{s}[/tex]
The horizontal velocity of the projectile at the time it reaches maximum altitude approximately equal to 131.331 meters per second.
Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around the Sun. Consider an asteroid that is spherically shaped with radius r and density 2000 kg/m^3.
1. You find yourself on the surface of this asteroid and throw a baseball at a speed of 24 m/s. If the baseball is to travel around the asteroid in a circular orbit, what is the largest radius asteroid on which you are capable of accomplishing this feat?
Answer:
The radius is [tex]r = 3.21*10^{4} \ m[/tex]
Explanation:
From the question we are told that
The density is [tex]\rho = 2000 \ kg/m^3[/tex]
The speed is [tex]v = 24 \ m/s[/tex]
Generally the largest radius of the asteroid is mathematically represented as
[tex]r = \frac{v^2}{ \sqrt{G * \rho * [\frac{4}{3} ] * \pi} }[/tex]
=> [tex]r = \frac{24^2}{ \sqrt{ 6.67*10^{-11} * 2000 * [\frac{4}{3} ] *3.142 } }[/tex]
=> [tex]r = 3.21*10^{4} \ m[/tex]
How much work was a baby doing if she used a force of 2N and pulled her rattle for 1.3 M?
I WILL SELL YOU MT SOUL PLS ANSWER ILL DO ANYTHING Yellowstone Park
A group of wildlife biologists is keeping track of the number of wolves in yellowestone park. the table bellows shows the number of eagle in yellowstone national park for selected years.
a. what is the independent variable
b. what is the dependent variable
c. explain what type of graph should be used to display this data and why
d. what would the label of the X axis be?
Answer:
A) Year
B) Number of Wolves
C) Bar graph
D) Year
Explanation:
A) The year is always definite; it never depends on any other variable. The number of wolves doesn't change the year.
B) The number of wolves depends on variables like food, water, shelter, ect. The number of wolves isn't magical and just change on its own.
C) I think a bar graph will work best best it shows a more visual representation of the number of wolves. A line graph can be confusing with how proportional and scattered the data is, and a scatterplot diagram would be better if you were tracking the number of wolves and another variable, like available food or something like that. With the given data, to me, a bar graph makes the most sense.
D) The independent variable tends to always be what x stands for, and the dependent variable always tends to be what the y stands for. Since the year is our independent variable, and our x is the year, we can name the x axis "Year." Its simple, but it works.
I hope this helps!
Does using toothpast with baking soda make my teeth whiter than toothpaste without baking soda? What's the Independent variable and what's the dependent variable, and also constant.
Answer: Teeth whitening is the dependent variable.
Toothpaste with or without baking soda are the independent variables.
Explanation:
An independent variable is required to be altered and tested on the experimental or dependent variable to know the effect of the independent variable on the dependent variable.
Here, the teeth whitening is the dependent variable which depends on the type of material used for making them white. The tooth paste with or without the baking soda is tested on teeth to check their whitening.
Look at the symbol. Which component in a circuit does it represent?
A. resistor
B. switch
C. AC power source
D. DC power source
Answer:
Resistor
Explanation:
a device having a designed resistance to the passage of an electric current.
As per the symbol in the figure, the component in a circuit it represents is a resistor. Hence, option A is correct.
What is a resistor?Electrical resistance is implemented as a circuit element by resistors, which are passive two-terminal electrical components. Resistors are devices that are used in electronic circuits for a variety of purposes, including lowering current flow, adjusting signal levels, dividing voltages, biasing active components, and terminating transmission lines.
As parts of motor controllers, power distribution networks, or even as for that for generators, rising resistors that really can dissipate several watts of electrical energy as heat may be used. When operating at a given temperature, time, or voltage, a fixed resistor's resistance only minimally varies.
In addition to being utilized as circuit element adjusters, variable resistors can also be used as sensors for chemical, force, heat, light, and humidity activity. Electronic equipment is rife with resistors, which are common components of electronic circuits and electrical networks.
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What is the answer to this question?
Answer:it c
Explanation: I took the test
Consider an amusement park ride in which participants are rotated about a vertical axis in a cylinder with vertical walls. Once the angular velocity reaches its full value, the floor drops away and friction between the walls and the riders prevents them from sliding down. How many revolutions does the cylinder make each second, given that the minimum coefficient of static friction that is needed to keep the riders from sliding down is 0.695 and the diameter of the cylinder is 13.5 m?
Answer:
0.231 rev/s
Explanation:
[tex]m[/tex] = Mass of cylinder
[tex]d[/tex] = Diameter of the cylinder = [tex]13.5\ \text{m}[/tex]
[tex]r[/tex] = Radius = [tex]\dfrac{13.5}{2}=6.75\ \text{m}[/tex]
[tex]\mu[/tex] = Coefficient of static friction = [tex]0.695[/tex]
[tex]N[/tex] = Normal force = [tex]mr\omega^2[/tex]
[tex]g[/tex] = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
The force equation of the system will be
[tex]\mu N=mg\\\Rightarrow \mu\times mr\omega^2=mg\\\Rightarrow \omega=\sqrt{\dfrac{g}{\mu r}}\\\Rightarrow \omega=\sqrt{\dfrac{9.81}{0.695\times 6.75}}\\\Rightarrow \omega=1.45\ \text{rad/s}[/tex]
Converting to rev/s
[tex]\dfrac{1.45}{2\pi}=0.231\ \text{rev/s}[/tex]
The number of revolutions of the cylinder is 0.231 rev/s.
i will mark you the brainliest, just answer my question correctly!
question: When creating a balloon car, the air in the balloon when make the car go which direction?
a. same
b. opposite
c. ballon does determine direction
d. all the above
Answer:
C) ballon does determine the direction
Explanation:
Explanation:
its B, It would push it the opposite
A train travels 110 km from South Bend, IN to Chicago, IL in 45 minutes. The train must continue from Chicago to Milwaukee, WI, a distance of another 150 km. In what time must it travel from Chicago to Milwaukee in order to have the same average speed as the first part of the trip?
Answer:
yes
Explanation:
mhm
Given the Kinetic energy formula KE= 1/2m x(v)^2 What would this formula be if it was set equal to velocity?
Which rock is a clastic rock
Answer:
C/third image.
Explanation:
Clastic rocks are defined as being composed of consolidated sediments formed by the accumulation of fragments derived from preexisting rocks and transported as separate particles to their places of deposition by purely mechanical agents.
Hope this helped!
-Toshino
If a net force is 0, is the force balanced or unbalanced
Answer:
It would be balanced
Explanation:
which non-renewable energy resources are fossil fuels? please help
Answer:
Natural gas, coal, petroleum
Explanation:
two compaines that makes driver less less cars
Waymo is far ahead of any other autonomous vehicle company since they have far more operable vehicles. Also, their vehicles have driven a lot more kilometres--both in real life and in simulations. GM (General Motors) Cruise division has the second-largest amount of operable vehicles. Although their vehicles have driven fewer kilometres compared to Waymo, they've still driven a considerable amount.
Ford Motor Company's Argo AI, Tesla, and Baidu are also notable mentions.
should you keep your money in a savings account
Answer:
You should split your money wisely. Keep some in a savings and keep some in a checking account. Save for emergencies and rainy days.
Explanation:
if a golf ball and baseball are thrown with the same force, which will have greater acceleration?
In one of the printed docunent the unit of universal gravitational constant is given Nm2kg-2.Check its correctness for dimension analysis.
Answer:
It is correct
Explanation:
Given dimension is:
Nm² kg⁻²
To find the dimension of the universal gravitational constant, let us state the law of universal gravitational constant.
"every particle attracts every other particle with a force that is directly proportional to their masses and inversely proportional to the mass between them".
F = [tex]\frac{Gm_{1} m_{2} }{r^{2} }[/tex]
F is the force
G is the universal gravitation constant
m is the mass
r is the distance between them
Using the dimension;
N = [tex]\frac{G x kg x kg}{m^{2} }[/tex]
Nm² = Gkg²
Unit of G = Nm² kg⁻²
Gina is sitting by a stream. She sees a clam shell on the bottom of the stream. An acorn falls in the stream and floats on the water. A wooden stick also floats by. Which object that Gina saw has the greatest density? A. Wooden stick, B. Clamshell, C. Acorn, D. Water
Answer:
B. Clamshell
Explanation:
Density is defined as mass per volume. The density of an object decides whether that object will sink or float if placed in water.
An object with higher density sinks in the water while an object with less density floats in water. In the given example, Clamshell has the highest density as it sinks in the water while other objects' wooden stick and acorn float over the water.
Clamshell has the highest density than water as well because the object has more weight per unit of volume and the buoyancy force of water decreases that allow the object to sink.
Hence, the correct answer is "B. Clamshell".
Matt manages a company that monitors the wastes from a company that produces radioactive byproducts. Matt is
most likely an)
O medical doctor.
O agricultural engineer.
O archeologist.
O nuclear scientist.
File:No file chosen
Whenever electrons of an atom unite with electrons of another atom, a chemical change occurs.
What is the cause?
What kind of change occurs?
Water expands when it freezes. Expanded ice floats on lakes and ponds.
What causes the water to expand?
What is the effect on the expanded ice?
Some metals will expand when heated. Expanded metals may bend.
What causes the metal to expand?
What are the effects of the expanded metal?
Gases expand when heated. An expanded gas occupies more space.
What causes the gas to expand?
What are the effects of the expanded gases?
Answer the above questions and give an example of a cause and effect relationship. See if you can think up a cause and effect relationship using acids, bases, and neutralization.
Answer:
C. would be the correct option
Explanation:
Burning gasoline is a chemical change because when gasoline is ignited, water and carbon dioxide are produced. Water freezing to form ice would be a physical change since its state of matter has changed, but not the water itself. Sugar dissolving in water is also a physical change because all it's really doing is just forming bubbles and changing the color. Choice D. would also be a physical change since the piece of metal is still a piece of metal, it just expanded when the temperature increased.
Which arrow represents the change of state described above? The diagram shows changes of state between solid, liquid, and gas. The atoms of a substance lose energy during a change of state. Before the change, the atoms are close together but are able to slide past one another. Ом N gas P M Ζ Ο P solid liquid
Its P path describes the change of state i.e from solid to liquid.
What is solid ?
"A solid is that state of matter which has a fixed shape, mass, and volume. It suffers very small changes in volume by changing the temperature. It can not be compressed, e.g. — Sand, Wood, Copper, Ice, etc."
What is liquid ?
"A liquid is a sample of matter that conforms to the shape of a container in which it is held, and which acquires a defined surface in the presence of gravity. The term liquid is also used in reference to the state, or condition, of matter having this property."
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Help 20 points
Look at SS
Answer:
1800 years
Explanation:
300*12=3600 (which is feet to inches)
3600/2=1800 (is the answer because it's 2 inches per year)