The time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
What is velocity?Velocity is defined as the speed at which an object's position changes in relation to time and a frame of reference.
It can also be defined as the direction of an object's motion as a measure of how quickly its position is changing as seen from a certain point of view and It is measured by a specific unit of time.
There are basically four types of velocity.
Uniform velocityNon uniform velocityAverage velocityInstantaneous velocityVelocity can be expressed as
Velocity = Distance / Time
Time = Distance / velocity
Time = 20 m / 45 m/s
Time = 0.44 m/s
Thus, the time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
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Which of the following is not an essential feature of scientific explanations?
a. They must be subject to testing.
b. They strictly pertain to the physical world.
c. Their validity is judged based on objective observations.
d. Once supported by observation, they can be viewed as a fact.
Answer:
D I think I might be wrong its been a while scense I did something like that
True or False: (2 points) If a scientist finds evidence that contradicts a hypothesis, law, or principle, then it is their choice whether to change the hypothesis, law, or principle.
Answer:
True
Explanation:
A hypothesis is an educated guess, it does not have to be right.
What is weight?
A. The force of gravity on an object
B. The amount of matter in an object
C. The mass of an object
D. How fast an object falls
Weight is the the force of gravity on an object.
What is weight?Weight in physics is the force on an object due to the gravitational attraction between it and the Earth (or whatever astronomical object it is primarily influenced by).
Weight is often confused with mass, however, weight is a force measured in Newtons (N) rather than in kilograms like mass.
The weight of an object is subjective to its location and it can be calculated from the mass by multiplying the mass by the acceleration due to gravity of the planet it is located.
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What is the acceleration at 1 second? Answer in units of m/s^2.
What is the velocity at 2 seconds? Answer in units of m/s.
What is the position at 2 seconds? Answer in units of m.
-- From 1 to 3 seconds, the acceleration is 2.5 m/s². (It changes suddenly at 3 seconds.)
-- At 2 seconds, the speed is 2.5 m/s .
-- At 2 seconds, the position is 1.25 meters.
BE CAREFUL !
I don't know where you got this graph, but you have to be very very careful when you try to read it. The Y-axis is not at time=0. It's at time=1. And all the whole-number seconds are between the blue lines.
If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding
Answer:
Explanation:
If an elements atomic mass and number are known you can also determine the number of protons and neutrons it has. You can also determine where it is on the periodic table. For example, if a element had a atomic mass of 10 then it would be higher up on the table then one with a mass of 20. Btw I do apex too.
why Venus is known as red planet?
Explanation:
because it appears in the sky as an ORANGE-RED STAR
Answer: Venus and Mars are known as red planets because it appears in the sky as an orange- red star.
how do i solve?
a = bc
(b)
Which state of matter has the MOST energy?
Answer:
Gas
Explanation:
The gas state of matter has the most energy because of how freely the molecules move
i need help for physics this is due todayyyyy
Answer
you need to give the speed (velocity)
Explanation:
with the speed given you input that into d= v*t
you know one hour or 60 minutes or 3600 seconds which are all equivalent and you can use any as the units need to be the same to do any equation and multiply that by the speed that you have already
Which state of matter has the MOST energy?
Answer:
gas has the most energy! hope that helps :D
which statement describes a question that can be answered by a scientific investigation?
Answer:
it is based on an observation of a natural phenomenon
Explanation:
Can the volume of a gas be measured?
A. Yes, the volume can be calculated once the mass is determined.
B. No, gas is soluble in liquid so it cannot be determined.
C. Yes, just the measure the volume of the container it is in.
D. No, the volume will always be different so it is inaccurate.
Answer:
C. Just measure the volume of the container it is in
Explanation:
Another why of measuring the volume of gas is by filling a contractor with water then in invert a glass jar air will miss place the space taken by water then measure the volume of water misplaced to get the volume to air
What is the independent variable?
Answer:
a variable (often denoted by x ) whose variation does not depend on that of another.
A cubic meter (m³) is ____________a cubic centimeter (cm³).
(A) larger than
(B) different from
(C) smaller than
(D) equal to
Your answer is D: equal to
Answer:
Larger than
Explanation:
cause if you look it up it says ¨1 Cubic meter (m3) is equal to 1000000 cubic centimeters (cm3). To convert cubic meters to cubic centimeters, multiply the cubic meter value by 1000000.¨ which mean you need one million cubic centermeters to make one cubic meter. so dont trust the other answer i dont think
When 2 protons, which are positively charges particles, come in contact they typically ______ one another.
A. Attract
B. Bond With
C. Destroy
D. Repel
A delivery man is told to go 60 miles per hour north to make his delivery on time. These instructions grab the delivery man's( 2 points)
A. speed
B. velocity
C. acceleration
D. magnitude
Answer:
The answer is B, velocity.
Explanation:
Just took the quiz. Hope this helps! Please count as braniliest.
Answer:
The answer is velocity.
Explanation:
Remember velocity is the speed of something in a given direction.
and beside i just took the quiz ♡
An African Bush Elephant can weigh up to 13,000 lbs, how many grams is that?
(Hint - 11b. = .54kg)
Final Answer:
What two factors affect the speed of a sound wave as it travels through a medium ?
Answer:
C, the type of medium and the temperature of the medium
Explanation:
edge 2021
You are skydiving and accelerating at 9.8 meters per second
squared. If your velocity is 55 meters per second, how long did it take you
to get up to that velocity?
12) A 26 kg chunk of ice is slid west across the frictionless surface of a frozen lake at 1.7 m/s . The chunk of ice collides with another chunk of ice, which is stationary and has a mass of 12 kg. The two chunks slide together as a single piece after the collision Calculate the final velocity of the combined ice chunks Show your work including the equation(s), values for the variables, and units
Answer:
1.16 m/s
Explanation:
Mass of first ice; m1 = 26 kg
Mass of second ice; m2 = 12 kg
Velocity of first ice; v1 = 1.7 m/s
Velocity of second ice; v2 = 0 m/s
From inelastic collision, the formula we will use is;
m1•v1 + m2•v2 = (m1 + m2)v'
Where v' is the final velocity of the combined ice chunks
Plugging in the relevant values gives;
(26 × 1.7) + (12 × 0) = (26 + 12)v'
44.2 = 38v'
v' = 44.2/38
v' ≈ 1.16 m/s
Lucifer is in a train traveling initially at 5.48 m/s west when she begins to accelerate west at the rate of 0.892 m/s/s for a time of 6.90 s. What is her velocity at the end of the acceleration?
Recall that
[tex]v_f=v_i+at[/tex]
which follows from the definition for average acceleration. So Lucifer has a final velocity of
[tex]5.48\dfrac{\rm m}{\rm s}+\left(0.892\dfrac{\rm m}{\mathrm s^2}\right)(6.90\,\mathrm s)\approx\boxed{11.6\dfrac{\rm m}{\rm s}}[/tex]
Rank the four fundamental forces from strongest to weakest
Answer:gravitational, weak nuclear, electromagnetic, strong
Explanation:
A bird flies 20 meters North, 10 meters South, and then 10 meters East. What’s the bird’s displacement? Also, can you explain how you did it? Thank you
Answer:
14.14 metres
Explanation:
Given that a bird flies 20 meters North, 10 meters South, and then 10 meters East.
the bird’s displacement can be calculated by first subtracting the value of distance from the south from the north.
20 - 10 = 10m
The displacement will be achieved by using pythagorean theorem
Displacement = sqrt ( 10^2 + 10^2 )
Displacement = sqrt( 200)
Displacement = 14.14 m
Therefore the displacement of the bird is 14.14 metres.
What is the name given to group 18 on the periodic table?
Answer:
Noble gases
also known as group 0
If u have a old dogs and it starts whining and it's legs lockup ,and wont let u pick it up. What do i do Im s scared?
The dog MUST be SEEN by a vet.
Not on the phone, not from your description. Not a web search, and not asking for advice online.
A qualified veterinarian has to have his hands on the animal, examine the dog, and make some suggestions. It might cost some money.
There's something missing here. A qualified real vet will never just say "I don't know, good bye!".
can you see the equator from outer space??
1. If you move 4 meters north and move 2 meters south what is the distance and the displacement?
2. If you move 2 meters east and move 4 meters west what is the distance and the displacement?
Please help!!It’ll be greatly appreciated
Answer:
distance will be 6diplacement will be 2
2. distance will be 6
displacement will be 2
The distance if we move 4 meters north and 4 meters south is 6 meters whereas, the displacement is 2 m. The same for the movement of 2 meters east and 4 meters west.
What is distance ?Distance is a physical quantity that measures how far we travelled from rest. It is the total length of the ways we moved. Distance is a scalar quantity. Displacement is a vector quantity showing the distance magnitude as well the direction.
If a person moves equal distances in opposite directions, then the displacement will cancel each other as in the case of force and the net displacement is zero.
Here, if move 4 m north and 2 meters south, the total distance is their sum , i.e., 6 meters. But the displacement for the opposite directions cancel in magnitude and the net displacement is 4-2 = 2 meters.
The same is applied for east and west movement. Hence, the distance is 6 m and displacement is 2 m.
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20=5 (x-10) solve for x.
Answer:
If 20 = 5 (x-10)
so 20= 5x-50
20+50= 5x
70=5x
x=70/5
so x=14
hope it's helpful for youTo what does the term register refer in describing sound?
HELPPPPPPPP PLSSSSSSSS A car moves with constant velocity along a straight road. Its position is x1 = 0 m at t1 = 0 s and is x2 = 66 m at t2 = 6.0 s . Answer the following by considering ratios, without computing the car's velocity.\ 1.What will be its position at t = 24 s ? 2.What is the car's position at t = 3.0 s ?
Answer:
Explanation:
6.2 miles
Answer: 1. 264, 2.33
Explanation: Explanation: 66m= 6s so, to find the position at 3s you just need to take 66/2 = 33m cause 3 is half of 6. & for 2 you will take 66x4= 264m cause it took 4s multiply by the original 6s to get 24s. Answer: 1 is 264m & 2 is 33m.
