Answer: 25 ft/s
Explanation:
(assuming his speed is constant and in a straight line)
1 yd = 3 ft
75 * 3 = 225 ft
Speed = Distance/time
225/9 = 25 ft/s
Please help will give the brainliest and 20 points, please don’t steal points you will be reported and NO LINKS please. Please give the right answer. Only 3 question
How did humans decide how long a year should be?
How is life on Earth affected by Earth's revolution around the Sun?
Why does the appearance of the Moon change throughout its cycle?
Answer:
3
Explanation:
3
What is the formula for displacement?
∆ = xf − xi
v = /
v = ∆/
∆ = v ∙ t
Choose all that apply
Answer:
Explanation:
Displacement is the change in an object's position from the origin. Displacement is a vector quantity, and thus has both magnitude and direction. Displacement = (final position) - (initial position) = change in position. D = Xf -Xi. D = displacement.
Can someone please help me think of an idea for this. My teacher wants me to think of a gadget that uses two simple machines, and it has to be able to help a child or an elderly person with a house hold chore. Please help me come up with an idea.
Ethan moves a 100 kg barrel up a 50 meter ramp. The amount of work Ethan has completed is
Answer: i think he's done 50% of work
Explanation:
Which of the following correctly explains a difference between the Steady State and Big Bang theories?
The Steady State theory says the galaxies are moving; the Big Bang theory says the galaxies are not moving.
The Steady State theory says the universe is getting smaller; the Big Bang theory says the universe is getting bigger.
The Steady State theory is supported by more evidence; the Big Bang theory is supported by less evidence.
The Steady State theory says the universe was always there; the Big Bang theory says the universe
Answer:
The Steady State theory says the universe is getting smaller; the Big Bang theory says the universe is getting bigger.
What characteristic is responsible for our brain being able to distinguish different colors?
Options:
Each color is a different wavelength of light
Each color of light has a different amplitude
Light changes colors as it goes through the different mediums between the air and our eyes
Each color has a different speed
Answer:
Each color is a different wavelength of light
Explanation:
Our brain mixes information from each receptor which gives contrasting perceptions to each wavelength.
HELP PLEASE and NO links please give the right answer
In the image above, what group or groups is the KKK threatening?
Answer:
lynch scalawags (left) and carpetbaggers (right)
im positive this is the answer
Explanation:
please mark me brainliest
Describe how urine is formed, beginning with the blood. (2 points)
(explain but easy because I don't need a whole paragraph
The urine is formed in the kidneys by filtering the wastes in the blood. The wastes are called urea. The urine is then traveled from the kidney and enters the urethra and bladder.
How urine is formed?The kidney, the bean-shaped excretory organ filters the waste product in blood and forms Urine. It comprises 95% of water and 5% of wastes such as sodium, potassium, and some nitrogenous wastes like ammonia and urea.
Urine formation involves three main steps. They are Glomerular filtration, Reabsorption, and Secretion. All these steps take place in Kidney, urine is formed and it leaves the kidney and enters the Urethra and Gall bladder.
Glomerular Filtration:
The blood gets filtered in the glomerulus is called Glomerular Filtration. This process takes place by crossing three layers. The layers are the Epithelium of Bowman's capsule, the Endothelium of glomerular blood vessels, and a membrane between these layers.
When blood enters the glomerulus, the blood gets filtered and absorbs all the constituents in blood, and enters into the Bowmann's capsule.
Reabsorption:
When the blood gets filtered into the Bowman's capsule, it reaches into the renal tubes. When the blood enters into the renal tubes the blood gets filtered up to 99%. This process is called reabsorption.
Secretion:
The final step in Urine formation is Tubular secretion. Tubular cells secrete Hydrogen ions and potassium ions. Through this process, the acid base and other body fluids are maintained constantly. After the secretion of ions, the urine is formed with the filtration of ions.
After the completion of the processes, the urine is passed out of the nephron tube and enters the urethra.
To learn more about the Kidney and its function:
https://brainly.com/question/13259057
#SPJ3
Please help with question!
Hey! May someone do these? False/incomplete are instant report!
Answer:
Friction is a force
Friction makes a moving object slow down
Type of friction: Air resistance
Surface with most friction is surface 2 because the cup is the highest up
Option 2 is the one that makes the car go forward
ice has the least friction
Explanation:
i am a scientist
Why do you think we use more digital items then analog?
Pleased help and thanks and no links or files pleased
PLEASE HLEP I WILL GIVE BRAINLIEST TO CORRECT ANSWER!!!!!!
The graph shows the constant speed of a train.
What is the speed of the train?
A. 1200 km/h
B. 300 km/h
C. 75 km/h
D. 4 km/h
Answer:
75 km/h
Explanation:
Speed = Distance divided by Time.
The train went a distance of 300 km in 4 hours. Therefore, the speed of the train is: 300 divided by 4 = 75 km/h
The speed of the train is equal to 75 km/h. Therefore, option (C) is correct.
What is speed?The speed of a body can be defined as the distance traveled by an object in a particular time interval. The average speed can be defined as a scalar parameter as it exhibits only the magnitude but not the direction of motion.
The speed of an object can be calculated from the ratio of the distance of the object to the time required to cover that distance.
The equation for the calculation of the speed can be written as follows:
Speed = distance /time taken
From the graph, at t = 2 h, the distance covered by train = 150 km
At time t = 4 h, the distance covered by train = 300 km
[tex]\displaystyle Speed = \frac{300-150}{4-2}[/tex]
Speed = 150/2
Speed of the train = 75 Km/h
Therefore, the speed of the train is 75 km/h.
Learn more about the speed, here:
brainly.com/question/12322912
#SPJ2
What is methanol? What is it made from?
Please help will give the brainliest
How did humans decide how long a year should be?
Answer:
The decided by staring at and observing the stars.
Explanation: