What gravitational acceleration does an object experience at the instant it is released at
one Earth radius above the surface of the Earth?

A) 1.3 m/s^2
B) 2.45 m/s^2
C) 4.90 m/s^2
D) 9.7 m/s^2

Answer:

the average current is 8000 A

Explanation:

I got it answered by an expert

Answer:

yes the nucleus of an

atom of an element

equal to its atomic

number

Answer:

the push pass and the wrist shot i believe

Explanation:

Answer:

Your ans

Explanation:

For floor hockey

Answer:

chemical energy to electrical energy to sound energy to heat energy

Answer:

chemical energy to electrical energy to sound energy to heat energy

Explanation:

Answer:

Explanation:

Given;

initial velocity of the rock, u = 15.5 m/s

at maximum height the final velocity of the rock, v = 0

The height risen by the rock is calculated as follows;

v² = u² - 2gh

0 = u² - 2gh

2gh = u²

h = u² / 2g

h = (15.5²) / (2 x 9.8)

h = 12.26 m

The time spent in air by the rock is known as time of flight, which is calculated as follows;

v = u - gt

0 = u - gt

gt = u

t = u/g

where;

t is the time to reach maximum height

t = 15.5 / 9.8

t = 1.58 s

Time of flight (time spent in air) is calculated as;

T = 2t

T = 2 x 1.58 s

T = 3.16 s.

Answer:

Crest is the highest point that a wave reaches and… Trough the lowest point that a wave reaches............Transverse waves are waves whose particles vibrate at right angles to the direction of wave travel e.g water wave. .....,.......longitudinal I think it's not "longitudin" are waves whose particles vibrate in a direction parallel to the direction of wave travel e.g sound wave

Answer:

7.8

Explanation:

Here, an effort of 50 N is applied at the car key and overcomes the resistance(or load) of 390 N at the lid.

mechanical advantage

=load/effort

=390 N/50 N

=7.8

Answer:

22.38 kW

Explanation:

A 1 HP motor is supposed to deliver power equivalent to 746 Watts, or in other words, the rotational mechanical energy delivered by the shaft of the motor is rated to be equal to 746 Watts or .746 kW. This .746 kW is the net result delivered by the shaft of the motor “after” overcoming losses from the total power consumed by the motor from its input source, wherein there are losses attributed to mechanical friction, electrical losses within the motor, sound, heat, etc. This difference between the electrical power consumed by the motor from the “input” source and the mechanical energy delivered from the “output” source (shaft) is defined as performance efficiency, which is mostly around 80% in most motors.

Now, presuming that your motor performs at 80% efficiency, the total power it consumes will be .746 kW/80 X 100 = 0.9326 kW/hour.

Therefore, if you keep the motor running for 24 hours, the total power consumption will be 0.9326 kW X 24 Hours = 22.38 kW

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Answer:

true

Explanation:

newton's third law of motion states that if body A exerts a force on the body B, then body B will exert an equal and opposite force on body A,

this is called action reaction pair

hope this helps

Answer: air pressure

Explanation:

Answer:

Frequency = 260 Hz and wavelength = 1.31 m

Explanation:

Given that,

A hammer begins vibrating back and forth at approximately 260 cycles per second.

(a) The frequency of an object is the number of vibrations per unit time. The frequency of the sound wave is 260 Hz.

(b) The speed of sound in air is 343 m/s. So,

[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{343}{260}\\\\\lambda=1.31\ m[/tex]

Hence, this is the required solution.

the salt solution exerts a greater up thrust on the egg which balances the weight of the egg, so the egg floats in a strong salt solution but sinks in fresh water

Answer:a repulsive electrical force. ... postulates that an electric field surrounds each charged object. If the distance between two spherical charged objects increases by a factor of two, then the electrical force between the objects. decreases by a factor of four.

Explanation: does this help

Answer:

In 5 years or so, the sun will be awash in sunspots and more prone to violent bursts of magnetic activity.

Explanation

once the magnetic field weakens the area and cold plasma enters the area of the sunspot

Answer

The answer is C I took the test an got an A.

Explanation:

K12 ASTRONOMY 7.07.04

Answer: a lot of MASS

Explanation:

I believe the answer for 1) is

PEgrav = mass • g • height

PEgrav = m *• g • h

Answer:

8m/s

Explanation:

i think i had this question on a test i'm taking so i'm assuming i cannot say for sure if this is correct

Answer:

6.52m

Explanation:

The horizontal distance travelled is known as its range. This is expressed as;

Range = u* √2H/g

u is the speed of the pelican

H is the maximum height

g is the acceleration due to gravity

Range = 8.79*√2(2.7)/9.8

Range = 8.79 * √5.4/9.8

range = 8.79*√0.5510

Range = 8.79*0.7423

Range = 6.52

Hence the fish will travel 6.52m before hitting the water below

Answer:

Climate Change and Extreme Weather

Establishing the most likely causes behind an extreme weather event can be challenging, since these events are due to combinations of multiple factors, including natural variability.

Explanation:

please give me brainlist and follow

Answer:

A. It is made of tissues that can conduct electricity, a required function in a system.

Explanation:

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

Answer:

D

Explanation:

it is D because a system needs to manage a large organism like us to allow us to live, therefore, needs to work with other systems to keep us alive

Answer:

i believe it's the last one

Explanation:

because the first law of thermodynamics states that energy can be changed from one form to another, but it cannot be created or destroyed.

good luck :)

i hope this helps

have a great day !!

Answer : Visible light cannot penetrate the skin. Ultraviolet rays have a higher frequency and therefore have more energy.

Explanation:

Answer:

Thrust is the force acting normally to a surface. So, Thrust = 1200 N. And , Pressure = Thrust / Area. = 1200 / 0.001. = ...

Explanation:

this right like me

Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.  

Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra.  

Answer:

A hydraulic press works on the principle of Pascal's law, which states that when pressure is applied to a confined fluid, the pressure change occurs throughout the entire fluid. Within the hydraulic press, there is a piston that works as a pump, that provides a modest mechanical force to a small area of the sample.

not my answer but i hope it helps

Explanation:

Answer:

1. BASKETBALL

A team sport that is placed in an indoor basketball court between two teams.

2. SOFTBALL

A team sport plays in an outdoor stadium or ground. It is similar to a baseball game.

3. COURT

A court is a place where any indoor game or team sport takes place.

4. REFEREE

A referee is a person or official that watches a game closely and decides if the game is played with rules or not.

5. UMPIRE

An umpire is a field official to look after the game to see if everything is according to the rules.

6. TRAVELLING

7. VOLLEYBALL

It is also team game plays in open field or beach between two teams where a net is placed between the teams.

8. FOUL

Foul is a penalty for breaking the rule of the game decides by umpire or refree.

9. INNING

An inning is the part of the game which is played by one of the team

10. SHOOTING

Answer:

1Burning of fossil fuel

2Deforestation

3Waste disposal in landfills

Explanation: took test:)

Human activities intensify the greenhouse effect as:

Deforestation -destroys natural carbon sinks, leading to more CO₂ in the air

Burning fossil fuels - the primary cause of human-created carbon emissions

Waste disposal in landfills - emits methane from decomposing matter

The greenhouse effect can be defined as a process that occurs when energy heats the planet's surface, but greenhouse gases in the atmosphere stop the heat from returning directly to space and warm the earth.

The natural greenhouse effect retains the earth from freezing at the below-freezing temperature that it will freeze if there were no greenhouse gases. Human activities increase greenhouse gases and trap larger amounts of heat, which cause the Earth's temperature to grow warmer over time.

The Sun delivers most of its energy as visible light and near-infrared light, while the average surface temperature of the Earth emits longer-wavelength infrared IR and radiant heat. These gases emit radiant heat in all directions, traveling heat to the air and warming other greenhouse gases in the atmosphere.

Learn more about the greenhouse effect, here:

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