Answer:
25 meters per second
Explanation:
2 halves so you find the average of the two by adding 20+30=50 then dividing it by number of halves, this is 2.
50/2=25
Usain Bolt ran 100 m in 9.58 s, reaching a final speed of 12.43 m/s. What was his acceleration?
Answer:
1.3m/s²
Explanation:
Given parameters:
Distance = 100m
Time taken = 9.58s
Final speed = 12.43m/s
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time; to solve this problem, we apply one of the motion equation;
v = u + at
v is the final speed
u is the initial speed
a is the acceleration
t is the time
u = 0m/s
Insert the parameters and solve;
12.43 = 0 + a x 9.58
12.43 = 9.58a
a = [tex]\frac{12.43}{9.58}[/tex] = 1.3m/s²
Select all the correct answers.
Which situations describe an elastic collision?
(A) Two glass marbles bounce off each other.
(B) Rodrick flops onto his sofa and sinks into the cushion.
(C) A tossed water balloon flattens when it lands on the grass.
D) A bowling ball knocks over five pins.
what was the rule of the sticks on each atom model
Answer:
That they must die
Explanation:
Stick = Die
At the top of a projectile's path above Earth, the acceleration of an object
Answer: At the top of a projectile's path above earth, the acceleration of an object. Compared to the range of a bullet shot horizontally, a bullet shot at a 30 degree angle.
Explanation: I hope that helped!
9. According to statistical theory, 68% of your measurements of time should fall within the range of and of therefore about 3 of your 5 measurements should satisfy this condition. How many of your measurements fall within this range? Are your errors random according to this theory?
Answer:
Yes
Explanation:
Yes, this is a random error generating because of statistical constraint. We only have finite number of data points. As per this, if we plot our observation we will get a gaussian (inverse bell ) shaped curve with mean equal to central value.
The soprano's singing caused a drinking glass to shatter.
Explain why this happened using what you know about
resonance.
Answer:
The soprano's singing matched the natural frequency of the glass, causing it to vibrate. The strong vibrations caused the glass to shatter.
Explanation:
edg 2020
Which body system includes protection of internal organs and blood cell formation? (4 points)
a
Integumentary system
b
Muscular system
c
Skeletal system
d
Cardiac muscular system
Answer:
The answer is C Skeletal System
find the distance traveled in km when the average speed is 60 km per hour and the time taken is 3 and 1/2 hours
Answer:
210 km
Explanation:
60 x 3 1/2 = 210
I need help plz
Help meh
Answer:
6. False
7. a
8.kinetic
9. ek/n
10.True
Explanation:
Answer:
1. kinetic
2. d
3. b
4. true?
5. true
6. True
7. a
8. kinetic
9. Thermal
10. true
A construction worker accidentally drops a brick from a high scaffold. a. What is the brick's velocity after 4.0 s? b. How far does the brick fall during this time?
Answer:
A. 39.2 m/s
B. 78.4 m
Explanation:
Data obtained from the question include:
Time (t) = 4 s
Acceleration due to gravity (g) = 9.8 m/s²
A. Determination of the brick's velocity.
Time (t) = 4 s
Acceleration due to gravity (g) = 9.8 m/s²
Velocity (v) =?
v = gt
v = 4 × 9.8
v = 39.2 m/s
Thus, the brick's velocity after 4 s is 39.2 m/s
B. Determination of how far the brick fall in 4 s.
Time (t) = 4 s
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) =?
h = ½gt²
h = ½ × 9.8 × 4²
h = 4.9 × 16
h = 78.4 m
Thus, the brick fall 78.4 m during the time.
The velocity after 4 seconds is 40 m/s and the height is 80 m.
From the equations of motion under gravity;
v = u + gt
V = final velocity of the brick
u = initial velocity of the brick
g = acceleration due to gravity = 10 ms-2
t = time taken
Note that, u = 0 m/s because the brick was dropped from a height.
v = 0 + 10(4)
v = 40 m/s
The height is obtained from;
h = ut + 1/2 gt^2
u = 0 m/s because the brick was dropped from a height.
h = 1/2 gt^2
h = 1/2 × 10 × (4)^2
h = 80 m
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Answer and Explanation:
Using a = F/m, we get:
Acceleration for Road A = 480/62 = ~7.74 m/s^2
Acceleration for Road B = 240/62 = ~3.87 m/s^2
Acceleration for Road C = 600/62 = ~9.68 m/s^2
If the net force becomes higher than 600N and the mass stays constant, the acceleration will increase proportionally to how much the force increases and the acceleration will be greater than the acceleration when the force is 600N.
I hope this helps! :)
What does the big ‘2’ in 2CO2 mean?
Please help quickly i'm in science class
Answer:
It means you multiply everything after the "Big two"
Explanation:
In which of the following instrument is the image that is formed erect
a. Pin hole camera b. Simple camera c. microscope d. periscope
Answer:
C. microscope
Explanation:
A simple microscope is magnifying glass, an ordinary double convex lens having a short focal length that produces virtual and erect image.
Which combustion product is a deadly gas that you cannot see or smell? O sulfur dioxide O carbon monoxide O carbon dioxide O sulfur monoxide
Answer:
carbon monoxide
Explanation:
Which of the following is most likely to produce a loud echo? Explain your answer.
Talking in a furnished, carpeted room
Singing in a tiled shower
Yelling across an open field
Number 3
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Answer:
b
Explanation:
yes
How to Calculate weight
Answer:
Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object's weight in Newtons (N) and m is the object's mass in kilograms.
Explanation:
We do not use water instead of mercury in a barometer.. why.
Answer:
Required Answer:-We don't use water as Water don't expand when it came in connection of temperature.An automobile travels a displacement of 75 km at 45 degrees north of East. How many kilometers north does it travel?
Answer:
the number of kilometers north it traveled is 53.03 km
Explanation:
The computation of the number of kilometers north it traveled is shown below:
Given that
The Displacement of 75 km
At east north of 45 degrees
Based on the above information, the number of kilometers is
= 75 × cos 45
= 53.03 km
Hence, the number of kilometers north it traveled is 53.03 km
We simply applied the above formula so that the correct value could come
And, the same is to be considered
Your car gets a flat! You go from 90 kilometers per hour to a stop in 6 seconds. What is your rate of deceleration? (it's negative!)
I need this ASAP!
Answer:
-15?
Explanation:
The specific heat capacity of oxygen is 918 J/kg °C. The specific heat capacity of water is 4181 J/kg °C. Which substance will require more energy to raise its temperature by 1°C?
Oxygen and water
Answer:
Water
Explanation:
Answer:
So, water has a specific heat of exactly 1.00 calorie per gram per °C. Because one calorie is equal to 4.18 J, it takes 4.18 J to raise the temperature of one gram of water by 1°C. In joules, water's specific heat is 4.18 J per gram per °C.
The answer is water.
How much time does it take a rhino running at 40 m/s to run 250 m?
Answer:
Rhinoceroses are odd-toed ungulates native to sub-Saharan Africa and southern Asia, though all five living species have hugely contracted in range and number due to the influence of humans. Despite their titanic, tank-like bulk, rhinos can be amazingly swift: The fastest may reach at least 50 kilometers per hour (31 mph).
Explanation:
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So I don’t really get it can you also explain what’s the difference between radiation,conduction, and convection?
Answer:
I think its radiation
Explanation:
Conduction is the transfer of heat through solids (A)
Convection is the transfer of heat through liquids or gasses (B)
Radiation is the transfer of heat through em waves (C)
How to get the radius from the circumference?
Answer:
The equation Pi = c/2r means that Pi (r) = c/2, so r = c / (2 Pi). The radius of a circle is therefore equal to c / (2 Pi), where c is the circumference of the circle.
Explanation:
What is the end product of mitosis?
A. Four gametes
B. Two identical nuclei
C. One complete zygote
D. A cell with one set of chromosomes
Answer:
It is B
Explanation:
I did the test
From the given options, the end product of mitosis is Two identical nuclei (option b)
Mitosis is a fundamental cellular process that occurs in somatic (non-reproductive) cells, aiming to create two genetically identical daughter cells from one parent cell. It consists of several stages: prophase, metaphase, anaphase, and telophase.
During prophase, the chromatin (a combination of DNA and proteins) condenses into visible chromosomes, and the nuclear membrane disintegrates. In the subsequent stage, metaphase, the chromosomes align at the cell's equator, ensuring each daughter cell receives an equal number of chromosomes.
Next comes anaphase, where the paired chromosomes are pulled apart and move towards opposite poles of the cell. The final phase, telophase, involves the formation of two separate nuclei around the separated chromosomes.
At the end of mitosis, the single parent cell has divided into two genetically identical daughter cells, each containing a complete set of chromosomes. These daughter cells are fully functional and capable of carrying out their specific tasks within the organism.
So, the correct Answer: B. Two identical nuclei.
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a 5 kg mass is accelerated at a rate of 2.5 m/s/s. what is the force that is exerted on this object
Answer:
12.5 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 5 × 2.5
We have the final answer as
12.5 NHope this helps you
What is the density of a piece of metal with a mass of 48g and a volume of 6 cm3
Answer:
A mineral has a volume of 6 mL and a mass of 12g.
Explanation:
Was this right?
Calculate the pressure exerted by the elephant (24000 Newtons) on the ground, assuming that
the total area of its feet is 0.8 m2.
Answer:
3000 PaExplanation:
The pressure exerted by the elephant can be found by using the formula
[tex]p = \frac{f}{a} \\ [/tex]
f is the force
a is the area
From the question we have
[tex]p = \frac{2400}{0.8} \\ [/tex]
We have the final answer as
3000 PaHope this helps you
I will mark a brainluest, And good ponits, Please help me out
Answer:
gas, liquid and the last one is opaque solid
Explanation:
Answer:
gas, liquid and the last one is opaque solid
Explanation:
A motorcyclist drives around a bend with a 20 m radius, with a constant velocity of 3 m/s. The motorcyclist and the motorcycle have a combined mass of 50 kg. What is the motorcyclist’s centripetal acceleration?
Answer:
[tex]a=0.45\ m/s^2[/tex]
Explanation:
Given that,
The radius of a bend, r = 20 m
Velocity of motorcyclist, v = 3 m/s
The combined mass of motorcyclist and the motorcycle is 50 kg
We need to find the motorcyclist’s centripetal acceleration. The formula used to find the centripetal acceleration is given by :
[tex]a=\dfrac{v^2}{r}\\\\a=\dfrac{(3)^2}{20}\\\\a=0.45\ m/s^2[/tex]
So, the acceleration of the motorcyclist is [tex]0.45\ m/s^2[/tex].
If we drop two iron balls, one ball is bigger than another one, from
same height which will fall first to ground? Explain why.
Answer:
The bigger one. Ignoring air resistance, they will fall at the same speed, but the bigger one will hit first because it sticks out lower.
Explanation: