is this right, please answer

Answer:I need this answer tooooo

Explanation:

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.

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

Answer:

false

Explanation:

X-radiation, is a penetrating form of high-energy electromagnetic radiation.

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.

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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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.

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

Answer:

true

hopefully, it's right

Answer:

true

Explanation:

hopefully this is what you needed

Answer:it c

Explanation: I took the test

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".

Answer:

C) ballon does determine the direction

Explanation:

Explanation:

its B, It would push it the opposite

Its P path describes the change of state i.e from solid to liquid.

"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."

"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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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.

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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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!

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.

Answer:

its very important in science because without atoms the universe would have not been created and our sun and our own planets

The nuclear reactions generally occurs in the deep part of the earth called the core. It is the fusion reaction which produce huge amount of energy to the universe. So the nuclear reactions important to the universe.

The process in which two lighter nuclei fuse together to form a heavier nucleus with the simultaneous release of a huge amount of energy is defined as the nuclear fusion. Some mass is always lost which is converted into energy in accordance with Einstein's equation.

It is the fusion reactions which are common in the interior of stars. The energy of our sun is believed to arise from a number of complex fusion steps. The sun is the ultimate source of energy in the universe which is due to the fusion reaction.

The nuclear reactions are responsible for the nucleosynthesis which means the formation of the elements in the universe.

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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.

Answer:

yes

Explanation:

mhm

Answer:

Natural gas, coal, petroleum

Explanation:

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)

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! :).

Answer:

please mark brainliest!

Explanation:

here are a few examples-

- The heat gives off subtle infrared rays which produce thermal energy to heat the floor.

- In the space of only a few nanoseconds, a great deal of magnetic energy is converted into the thermal energy of the plasma.

- Although there have been some changes in the thermal energy in the park since 1871, there has been no appreciable diminution.

- Hence a part of what must be included in thermal energy is not simply proportional to temperature as is commonly assumed.

hope this helps !

Answer:

It would be balanced

Explanation:

Answer:

(A) Increases

Explanation:

Hope this helps ;)

Answer:

approximately one gram

The mass of one cubic centimetre of water at 3.98 °C (the temperature at which it attains its maximum density) is closely equal to one gram. The basic unit of measurement for mass in the metric system; one cubic centimeter of water has a mass of approximately one gram.

Answer:one gram

Explanation:

Answer:

An upward force N is exerted by the elevator floor on the person. The relationship between N and W is 1. ... N = W .

Explanation:

The relationship between N and W is ,  [tex]N=W[/tex]

Since,  Person of weight W standing in an elevator that is accelerating downward. An upward force N is exerted by the elevator floor on the person.

From Newton's third law ,  It states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.

Therefore,  weight of person W and upward force N exerted by elevator floor must be equal.

  So that,           [tex]N=W[/tex]

Thus, option 2 is correct.

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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.)