PLEASE HELP AM I CORRECT??!!

Answer:

expands

Explanation:

Answer:

a. t = 1.43 s

b. d = 7.88 m

Explanation:

a. The time of flight can be found using the following equation:

[tex] y_{f} = y_{0} + v_{0_{y}}t - \frac{1}{2}gt^{2} [/tex]

Where:

[tex]y_{f}[/tex]: is the final height = -10 m

[tex]y_{0}[/tex]: is the initial height = 0

[tex]v_{0_{y}}[/tex]: is the initial speed in the vertical direction = 0

g: is the acceleration due to gravity = 9.81 m/s²

By solving the above equation for "t" we have:

[tex] t = \sqrt{\frac{2y_{f}}{g}} = \sqrt{\frac{2*10 m}{9.81 m/s^{2}}} = 1.43 s [/tex]

Hence, the ball will hit the ground in 1.43 s.

b. The distance in the horizontal direction can be found as follows:

[tex] x_{f} = x_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]

Where:

x₀: is the initial position in the horizontal direction = 0

a: is the acceleration in the horizontal direction = 0 (it is moving at constant speed)

[tex] x_{f} = 5.51 m/s*1.43 s = 7.88 m [/tex]

Therefore, the ball will travel 7.88 m before it hits the ground.

I hope it helps you!

Answer:

about 2000 klm per min

Explanation:

Answer: 5 amps

Explanation: I = Q/t

Answer:

0.78 m

Explanation:

us the formula

speed = frequency x wavelength

343 = 440 x wavelength

343 / 440 = wavelength

wavelength = 0.78 m

I think the last option, you wrote wrongly, it is supposed to be 0.78 not 0.078 .

if you think I am wrong please do tell me, I will redo this.

hope this helps

Answer:

Economics is the study of how societies use scarce resources to produce valuable commodities and distribute them among different people.

Explanation:

The ultimate goal of economic science is to improve the living conditions of people in their everyday lives.

Hope this helps!

Answer:

the branch of knowledge concerned with the production, consumption, and transfer of wealth. (basically the study of money and not just banks but how it effects the world)

Explanation:

Answer:

A

Explanation:

the moon rotates exactly once every time it circles the Earth.

Answer:

Schwarzschild radius is the radius of the boundary of a hole of this type.

Answer:

Opposition of passing a electric circuit

Answer:

Can you help me in mathematics

Answer:

Carbon Dioxide and Water.

Explanation:

This is the chemical formula for photosynthesis!

Answer:

B. measure the distance that the plane flew and record it

Explanation:

Explanation:

1.The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles. 

2. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, digestion, respiratory rate, pupillary response, urination, ect...

3. Sympathetic Division is a term used by researchers and medical practitioners to describe the subdivision of the autonomic nervous system (that controls involuntary and automatic physical reactions) that responds to emergency situations by mobilizing and controlling the energy necessary to cope with the situation.

4. The part of the autonomic nervous system that tends to act in opposition to the sympathetic nervous system, as by slowing down the heart and dilating the blood vessels. It also regulates the function of many glands, such as those that produce tears and saliva.

5. a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.

Answer:

U could measure it in area and in operations.

Answer:

meters, millimeters, kilometers, centimeters, inches, feet, yards, miles

Answer:19.51%

Explanation:

Answer:

W = 1.96 J

Explanation:

Given that,

The mass of an Apple, m = 100 g = 0.1 kg

It fell from 2 metres high tree.

We need to find the work done by it. The work done is given by :

[tex]W=mgh\\\\W=0.1\times 9.8\times 2\\W=1.96\ J[/tex]

So, the required work done is 1.96 J.

Answer:

A thermistor is an electrical device, a thermally sensitive semiconductor resistor, whose resistance changes in response to temperature. Thermistors are made in a variety of ways including thin films (SiC).

Explanation:

hope it helps

Answer:

48 degress

Explanation:

An earthquake causes many different intensities of shaking in the area of the epicenter where it occurs. So the intensity of an earthquake will vary depending on where you are. Sometimes earthquakes are referred to by the maximum intensity they produce. In the United States, we use the Modified Mercalli Scale. Earthquake intensity is a ranking based on the observed effects of an earthquake in each particular place. Therefore, each earthquake produces a range of intensity values, ranging from highest in the epicenter area to zero at a distance from the epicenter.

Answer:

The majority of pollutants that make their way into the ocean come from human activities along the coastlines and far inland. One of the biggest sources of pollution is nonpoint source pollution, which occurs as a result of runoff.

Answer:

yes it does

Explanation:

it's not like Balloon it is a solid so it the earth does have a mass

Answer:

C

Explanation:

frequency = 1 / period

so

frequency = 0.25

0.25 = 1 / period

1 / 0.25 = period

4 s = period

it is not 4 Hz because period is the time taken

so the answer is C

hope this helps ,please mark it

Answer:

d

Explanation:

is the answer

Answer: The stratosphere and the troposphere are defined by the variation in temperature with height. Within a troposphere, the temperature drops as altitude increases, and drops fast enough for convection to occur. Whereas within a stratosphere, the temperature rises with increasing altitude. Features of the atmosphere change with altitude: density decreases, air pressure decreases, temperature changes vary. Different temperature gradients create different layers within the atmosphere. The lowest layer is the troposphere where most of the atmospheric gases and all of the planet's weather are located.

Explanation:

Answer: They have different rigidities.

Explanation:

Answer:

I would include extra insulation, a heating system, and some snug-fitting sweaters.

Explanation:

that way i won't get cold