Answer:
watch mark rober on yt he explains how to win
Explanation:
look up "Mark rober egg drop"
Answer:
does anyone have the lab report???
Explanation:
If an arrow is fired from a bow with a perfectly horizontal velocity of 60 m/s and the arrow
was 2 m above the ground when it was released, how far will the arrow fly horizontally before it strikes the ground?
Explanation:
This problem is solved by determining how long it takes the arrow to fall to the ground in exactly the same manner as if the arrow was dropped with no horizontal velocity. The time required for the arrow to fall to the ground will be the same time that the arrow flies horizontally at 60.0 m/s, so
d=1/2at^2
solved for t=√2d/a
t=√(2)(2.00m)/9.80m/s^2 =0.639s
The time required for the fall is multiplied by the horizontal velocity to get the horizontal distance.
d(horizontal)=v(horizontal)×time=60.0m×0.639s =38.3m
The arrow will fly 37.8 meters in the horizontal direction before it strikes the ground.
What is projectile motion?Projectile motion is a form of motion experienced by an object or particle that is projected near Earth's surface and moves along a curved path under the action of gravity only.
Given is an arrow fired perfectly along the horizontal direction with velocity of 60 m/s. The arrow was 2 m above the ground when it was released.
initial horizontal velocity = u[H] = 60 m/s
initial vertical velocity = u[V] = 0 m/s
Horizontal acceleration = a[H] = 0 m/s²
Vertical acceleration = a[V] = 9.8 m/s²
Vertical distance = S[V] = 2 m
Using second equation of motion for vertical direction to calculate time taken to reach the ground.
S[V] = u[V] × t + 1/2 a[V] × t²
S[V] = 1/2 × a[V] × t²
2 = 1/2 x 9.8 x t²
4/9.8 = t²
t² = 0.4081
t = 0.63 seconds
Horizontal distance covered = S[H] = u[H] x t
S[H] = 60 X 0.63 = 37.8 meters
Therefore, the arrow will fly 37.8 meters in the horizontal direction before it strikes the ground.
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who was the creator of sports
Answer:
James Naismith (November 6, 1861 – November 28, 1939) was a Canadian-American physical educator, physician, Christian chaplain, sports coach, and innovator.
Explanation:
What is the amount of heat, in calories, given off from a 5 g piece of aluminum when it cools from 80°C to 20°C? The specific heat capacity of aluminum is 0.215 cal/g∙°C. Show your work.
Answer:
Q (heat) = S * m * (T2 - T1) where Q is heat gained (loss), S the specific heat capacity of the substance and T2, T1 are the final and initial temps
Q = .215 cal / (g deg C) * 5 g * (20 - 80) deg C = -64.5 cal
Since the question specifies the heat emitted, then 64.5 cal is the
heat emitted (loss).
As shown in the figure below, a cow runs leftward 50 m to eat some apples, then walks leftward another
100 m to munch on some flowers. The cow's total travel time is 230 s.
Answer:velocity =-.65 speed=.65
Explanation:
i got the answer right on kahn academy
Select the appropriate shape for the given volume formula.
V = trh
va
V = jwh
V=
Answer: hope this helps
Explanation:
true or false. both the incident and reflected ray lie in the same plane.
Answer:
I think its false...........
Measure Your Reaction Time Here's something you can try at home-an experiment to measure your reaction time. Have a friend hold a ruler by one end, letting the other end hang down vertically. At the lower end, hold your thumb and index finger on either side of the ruler, ready to grip it. Have your friend release the ruler without warning. Catch it as quickly as you can. If you catch the ruler 6.4 cm (~2.5 inches) from the lower end, what is your reaction time?
Answer:
Explanation:
The reaction time will be equal to the time the ruler takes to fall by 6.4 cm .
the ruler is falling with acceleration due to gravity which is equal to
9.8 m /s²
S = ut + 1/2gt²
s is distance of fall , u is initial velocity , t is time and g is acceleration due to gravity .
6.4 = 0 + 1/2 x 9.8 t²
t = 1.14 s .
So reaction time is 1.14 s .
Answer:
0.114s
Explanation:
--------------------------------------------------------------------------------------------------------------
The reaction time is simply how long it takes the ruler to fall 6.4 cm.
For this problem, all you gotta do is convert your units and then plug them into a kinematic equation for t (time).
{*0.01 the conversion from cm to m}
--------------------------------------------------------------------------------------------------------------
Units:
Δx (change in x) or d = 6.4 cm = 0.064m
Vi = 0 m/s
a = 9.81 m/s^2
t = ?
--------------------------------------------------------------------------------------------------------------
[tex]d = Vi * t + \frac{1}{2} *a*t^{2}[/tex]
(0.064) = 0 * t + 1/2 * (9.81) * t^2
↓
0.064 = 1/2 * (9.81) * t^2
↓
0.064 = 4.905 * t^2
↓
0.01304791 = t^2
↓
t = 0.114s
--------------------------------------------------------------------------------------------------------------
Your reaction time is 0.114s
Question: How is a triple beam balance used to find mass?1. Observe: The riders have masses of 10 grams (top), 100 grams (middle), and 1 gram (bottom). Drag the 100-gram rider to 300. At this position it balances a 300-gram mass.What happens to the pointer? ________________________________________________2. Compare: Place each object on the measurement tray, one at a time. Which objects have a mass greater than 300 grams? ________________________________________________ How do you know? _________________________________________________________
Answer:
1) For the weight to be correct, the pointer must be below the reference (zero) or in it
2) mass greater than 300 g leave the pointer below the reference,
3) put weight on the other arms the pointer gets closer to the reference
Explanation:
1) A three-arm scale is used to determine the weight of a body by successive approximations, starting with the arm with the greatest mass (middle), when the pointer is close to zero without going over, weights are placed on the second arm (above ) weight is placed to bring the pointer closer to the reference without going over and when it is used the arm with the lowest mass is used (below) with this one, masses are placed until reaching the reference,
Taking all the jinetillos placed the total weight, the product of the position of the jinetillo by the precision of the arm and then the three values are added.
In the example given, the jinetillo is placed in position 3 of the 100 arm, so the weight is 300 gr.
For the weight to be correct, the pointer must be below the reference (zero) or in it
2) objects with a mass greater than 300 g leave the pointer below the reference, it must be completed with the other two arms to reach the correct weight
3) when you put weight on the other arms the pointer gets closer to the reference
Ability to make things move is called
Answer:
Force
Explanation:
You can't "make" things move but you can apply enough force on to an object for it to move, pls brainliest!
A wildebeest and chicken participate in a race over a 2.00km long course. the wildebeest travels at a speed of 16.0m/s and chicken can do 2.50m/s. the wildebeest runs for 1.600km and then stops to tease the slow-moving chicken, which eventually passes by. the wildebeest waits for a while after the chicken passes and then run toward the finish line. both animal cross the finish line at the exact same instant. assume boat animals, when moving, move steadily at their respective speed.
(a) how far (in m) is the chicken from the Finish Line when the wildebeest resume the race?
(b) for how long in time (in s) was the wildebeest stationary?
Answer:
(a) The distance of the chicken from the finish line is 62.5 m
(b) The stationary time of the wildebeest is 675 s
Explanation:
Given;
total distance traveled by wildebeest and chicken, d = 2 km = 2000 m
speed of the wildebeest, [tex]v_w[/tex] = 16 m/s
speed of the chicken, [tex]v_c[/tex] = 2.5 m/s
Time for wildebeest to finish the race without stopping, 2000 / 16 = 125 s
Time for chicken to finish the race without stopping, 2000/2.5 = 800 s
(b) for how long in time (in s) was the wildebeest stationary?
t(stationary) = t(chicken) - t(wildebeest)
t = 800s - 125 s
t = 675 s
(a) how far (in m) is the chicken from the Finish Line when the wildebeest resume the race?
The time taken for the wildebeest to run 1.6 km (1600 m) is given by;
t = 1600 / 16 = 100 s
The total time spent by the wildebeest before it resumed the race = stationary time + 100s
t (total) = 675 s + 100 s = 775 s
Distnace traveled by the chicken when the wildebeest resumed the race = 2.5m/s x 775s = 1937.5 m
Thus, the distance of the chicken from the finish line = 2000 m - 1937.5 m
the distance of the chicken from the finish line = 62.5 m
According to the question,
Distance, [tex]S = 2 \ km \ or \ 2000 \ m[/tex][tex]S_1 = 1.6 \ km \ or \ 1600 \ m[/tex]
Speed, [tex]V_w = 16 \ m/s[/tex][tex]V_c = 2.5 \ m/s[/tex]
Time, [tex]t_1 = \frac{S_1}{V_w}[/tex][tex]= \frac{1600}{16}[/tex]
[tex]= 100 \ s[/tex]
[tex]t_2 = \frac{400}{16}[/tex]
[tex]= 25 \ s[/tex]
Now,
→ [tex]T= \frac{S}{V_c}[/tex]
[tex]= \frac{2000}{2.5}[/tex]
[tex]= 800 \ s[/tex]
(a)
Distance will be:
→ [tex]S_c' = V_c\times t_2[/tex]
By substituting the values,
[tex]= 2.5\times 25[/tex]
[tex]= 62.5 \ m[/tex]
(b)
Time will be:
→ [tex]T_{static} = T-(t_1+t_2)[/tex]
[tex]= 800-125[/tex]
[tex]= 675 \ s[/tex]
Thus the responses above are correct.
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These littler girls are trying to shoot a question to research for the school science fair. Which question may not be answered through scientific investigation
Answer:
i had this question as well
Explanation:
The questions at the bottom are 1. Both moving at a constant a velocity.2.Both accelerating.3.Both stopped.4.Bith have a force on them so what is the answer
At the end of the school day, at exactly 2:30 pm, a group of students run out of the school building and reach the edge of the school property at 2:30:45 s. Which of the following correctly describes the motion in terms of time?
Question 2 options:
A)
t1= 0, t2 = 2:30:45 s, ∆t = 45 s
B)
t1= 2:30, t2 = 45 s
C)
∆t = 2:30
D)
t2= 2:30:45 s, ∆t = 45 s
Explanation:
Initial time, t₁ = 2:30 pm
Final time, t₂ = 2:30:45
We need to find the motion of students in terms of time. Final time is 45 seconds more than the initial time.
Change in time,
[tex]\Delta t=t_2-t_1\\\\\Delta t=2:30:45-2.30\\\\\Delta t=45\ s[/tex]
Hence, this is the required solution.
The students need 45 seconds to reach out at the edge of the school property with the final interval of 2:30:45 s. Hence, option (D) is correct.
What is a time interval?The difference between the moment of starting an event and the completion of the same is known as the time interval.
Given data -
The exact time to start the day at school is, t1 = 2:30 pm.
The time given to reach the edge of the school property is, t2 = 2:30:45 s.
In order to describe the motion, we need to obtain the change in the time interval. Then the expression for the change in the time interval is,
Δt = t2 - t1
Solving as,
Δt = 2:30:45 - 2:30
Δt = 45 s
Thus, we can conclude that the students need 45 seconds to reach out at the edge of the school property with the final interval of 2:30:45 s.
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Which word contains a prefix that means against?
A
microwave
B
antidepressant
с
macrobiotic
D
overdramatic
how does the rocket engine work?
Answer:
The vacuum of space
Heat management problems
The difficulty of re-entry
Orbital mechanics
Micrometeorites and space debris
Cosmic and solar radiation
The logistics of having restroom facilities in a weightless
Explanation:
Conjecture: The population of White is 80% of the total population.
Is this conjecture true?
A. No, the percentage of White is found by dividing 301,461,533 by 224,469,780 and gives 1.34%
B. No, the percentage of white is found by diving 301,461,533 by (301,461,533 - 224,469,780) and gives 3.92%
C. Yes.
D. No, the percentage of white is found by dividing (301,461,533 - 224,469,780) by 301,461,533 and gives 25.54%
E. No, the percentage of White is found by diving 224,469,780 by 301,461,533 and gives 74.46%
Answer:
E. No, the percentage of White is found by dividing 224,469,780 by 301,461,533 and gives 74.46%
Explanation:
Remember, the term percentage or finding a percentage means finding the proportion or share out a whole.
From the attached image we could notice that the total population is 301,461,533. According to the rules of mathematics, to find the percentage of White citizens by dividing 224,469,780 by 301,461,533
[tex]\frac{224,469,780}{301,461,533}[/tex] x 100 = 74.46%.
7.In North America, a magnetic compass will point to
a - magnetic north
b- Santa's workshop
C - the South Pole
d - Italy
Answer:
I think then answer for this question is number c. the South pole
What do physicist use to help us understand how things move and work?
choose all that applies
Models
Religion
Mathematics
Answer:
Models,Mathematics
am not sure pliz mark brainliest
Explanation:
a ship sends a sound wave straight to the seabed and receives the echo 1.5s later. the speed of sound in sea water is 1500 m/s how deep is the sea at that place
Answer:
Approximately [tex]1125\; \rm m[/tex].
Explanation:
Calculate the distance that sound would travel in [tex]1.5\; \rm s[/tex] at [tex]1500\; \rm m \cdot s^{-1}[/tex]:
[tex]s = v\cdot t = 1500\; \rm m\cdot s^{-1}\times 1.5\; \rm s = 2250\; \rm m[/tex].
Sound waves in this question here needs to:
travel from the ship to the bottom of the sea,get reflected at the ocean floor, andtravel back to the ship from the bottom of the ship.Hence, the total distance that sound travelled in that [tex]1.5\; \rm s[/tex] would be the sum of:
the length of the path from the ship to the ocean floor, and the length of the path from the ocean floor back to the ship.Therefore, the distance [tex]2250\; \rm m[/tex] here is supposed to be approximately twice the depth of the sea at that place. The depth of the sea would thus be approximately:
[tex]\displaystyle \frac{1}{2}\times 2250\; \rm m = 1125\; \rm m[/tex].
What is the equation for theoretical velocity of a projectile motion???? Please help I’m crying
Jason walks 20 m East, turns around and 20 m West, Finally, he walks 10 rn North. This takes 20 s. what is Jason's velocity
Answer:
0.5 m/s north
Explanation:
Take east to be +x, west to be -x, north to be +y, and south to be -y.
His displacement in the x direction is:
x = 20 m − 20 m = 0 m
His displacement in the y direction is:
y = 10 m
His total displacement is therefore 10 m north.
His velocity is equal to displacement divided by time.
v = 10 m north / 20 s
v = 0.5 m/s north
The kinetic energy of an object increases as its ____ increases.
Question 12 options:
gravitational energy
potential energy
specific heat
velocity
Answer:
velocity
Explanation:
velocity is the answer
The kinetic energy of an object increases as its velocity increases. The correct option is D.
An object's kinetic energy is linearly related to the square of its velocity. In other words, an object's kinetic energy grows more quickly the faster it moves. The equation below describes this relationship:
Kinetic Energy = (1÷2) × mass × velocity²
Therefore, the increase in kinetic energy of an item depends on its velocity. Potential energy, not kinetic energy, includes gravitational and potential energy.
Specific heat is a quality associated with a substance's ability to retain heat; it is unrelated to the kinetic energy of an object.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is:
The kinetic energy of an object increases as its ____ increases
A. gravitational energy
B. potential energy
C. specific heat
D. velocity
please help. ill make you BRAINLIEST
Answer:
because well I dont even know sorryy but you got this
9 write the Greek etymological meaning of Tracheophyta.
Answer:
Etymology. From Ancient Greek τραχεῖα (trakheîa, “windpipe”) + -ophyta; compare English trachea
Explanation:
During a journey, a bus travelled 319 miles in 6 hour and 221 miles in 3
hours. What was the average speed for the whole journey?
mph
Explanation:
i hope i have been useful buddy.
good luck ♥️♥️♥️.
Given parameters:
Distance 1 = 319 miles
Time taken 1 = 6 hours
Distance 2 = 221 miles
Time taken 2 = 3 hours
Unknown:
Average speed = ?
To find the average speed we need find the total distance traveled and divided by the total time taken for the travel.
Speed is a scalar quantity that expresses the distance covered per unit of time.
Mathematically;
Average speed = [tex]\frac{Total distance }{Total time taken }[/tex]
= [tex]\frac{distance 1 + distance 2}{time taken 1 + time taken 2}[/tex]
= [tex]\frac{319 + 221}{6 + 3}[/tex]
= 60miles/hr
The average speed of the bus is 60miles/hr
What is the distance an object travels and the direction of its motion from starting point?
Answer: Well you didn't give any answers so my guess would be it depends how much force you put into it and where you throw it.
Explanation:
Why do people calculate net force and make force diagrams?
O It allows us to calculate speed of an object
It allows us to predict the mass of objects
It allows us to predict motion and changes in motion
It allows us to calculate mass and weight
why would a sound wave travel faster through a solid than a gas? Why can they not travel in outer space (which is a vacuum) at all? explain
Answer:
They travel fastest when the particles are able to collide more. Because there is no medium in a vacuum, it will travel the fastest. ... Solids, because of how close the particles are.
Explanation:
They travel fastest when the particles are able to collide more. Because there is no medium in a vacuum, it will travel the fastest. ... Solids, because of how close the particles are.
A crane lifts 4 bricks per minute through a height of 1.5m. Find the power that is expected if each brick weighs 100N
A. 2.5w
B. 10.0w
C. 150.0w
D. 600.0w
What are the 6 factors of sustainability
Answer:
social impact, focused business strategy, economic viability
Explanation:
Just like the journalism industry, the factors of sustainability are ever-evolving. Community Wealth Partners recommends that nonprofit organizations consider how they are performing across five key drivers of sustainability which is social impact, focused business strategy, economic viability
