Answer:
The target is 2 meters ahead of you.
If you throw the snowball with a velocity S, then the time that the snowball will need to hit the target is:
2m/S = T
Now let's analyze the vertical problem.
The only force acting on the snowball is the gravitational force, then the acceleration will be -g = -9.8m/s^2.
a(t) = -9.8m/s^2
For the vertical velocity, we need to integrate over time and get:
v(t) = (-9.8m/s^2)*t + v0
Where v0 is the initial vertical velocity, in this case is zero because the ball is thrown horizontally.
v(t) = (-9.8m/s^2)*t
For the vertical position, we integrate again over time.
p(t) = (-4.9m/s^2)*t^2 + p0.
Now, we know that when the ball hit the target, it hits 9 meters below the desired point (where the desired point is p0), so p(2m/S) = p0 - 9m.
Then we have:
(-4.9m/s^2)*(2m/S)^2 = -9m.
We need to solve this for S.
(-4.9m/s^2)*4m^2/-9m = S^2
2.178 m^2/s^2 = S^2
√(2.178 m^2/s^2) = S = 1.48 m/s
The horizontal velocity is 1.48 m/s
A jumpy squirrel is trying to cross the street. Its velocity v as a function of time t is given in the graph
below where rightwards is the positive velocity direction
v (m/s)
3
4
-2-+
-3
-4-
-5
What is the squirrel's displacement Au from t = 1s to 2 s?
Answer with two significant digits.
m
Show Calculator
Answer: 2.5 m
Explanation: 1/2(1s)(5m/s)
=2.5.
Got it from Khan Academy
According to Rahul any two bricks tied together would fall faster than a single
one under the action of gravity by neglecting air resistance. Do you agree with
Rahul? Give a reason to support your answer.
Answer:
Rahul is wrong.
Explanation:
From Newton's universal law of gravitation, we know that the force of attraction between two falling body masses is directly proportional to product of masses of two bodies and has an inverse proportional relation with the square of the distance between the masses.
If the 2 masses are M1 & M2, while distance between them is d, this can be written as;
F ∝ M1•M2
And F ∝ 1/d²
We also know that the acceleration due to gravity is given as;
g = GM/r²
Where;
M is the mass of earth
r is the radius of earth
From the above 3 formulas, we can deduce that the value of the acceleration due to gravity(g) is independent of the 2 masses of the falling body as it depends on only the mass of the earth and radius of the earth.
This means that the acceleration due to gravity will be the same whether the bricks are doubled or whether it remains single.
Thus, they will fall with same velocity in each case. So Rahul is wrong.
Karissa is conducting an experiment on the amount of salt that dissolves in water at different temperatures. She repeats her tests several times using the same procedure.
What can Karissa do to further increase confidence in the results of her experiment?
have another scientist run the same exact procedure in her lab
include several other liquids for comparison
calculate the average amount of salt that dissolves to summarize findings
make sure the experiment follows a specific procedure that allows other scientists to produce the same findings
Answer:
C.) Calculate the average amount of salt that dissolves to summarize findings
Explanation:
Just telling you, nobody reads these things. They just look at the answer and say oh i got it right now but you should bc i got a 50 on this quiz and this was one of them that was right so believe me when i say, i got this question right. UwU <333333333
Answer:
Calculate the average amount of salt that dissolves to summarize finding
-The third choice/ C-
Have a good day :)
what is torricellian vaccum
Answer:
a vacuum formed above the column of mercury in a mercury barometer.
Answer:
An air-free space above the free surface of a liquid in a vessel that is closed above the liquid
PLEASE HELP! Which event is an example of vaporization?
A. Fog forms in a valley.
B. People see their breath on a cold winter day.
C. Dew forms on the leaves of a tree.
D. A spilled drop of rubbing alcohol.
Answer:
A. Fog forms in a valley
Atoms of the same element can have different properties.
A) True
B) False
Answer:
False.
Explanation:
All atoms of the same element have the same number of protons, but some may have different numbers of neutrons.
how long does it take sound to travel the distance between the two microphones? Given.:wave 1 of microphone 1 has T=2 sec and f=1/2Hz and the speed of propagation of the sound is 330m/s
Answer:
0.00583 seconds
Explanation:
What happens when your wearing socks and you shuffle across a carpet then touch a door knob?
Answer:
You build up kinetic energy and you get shocked this happens because static has built up from the socks and the rug. This also happens when you rub a balloon on your head or shuffle across a trampoline with socks on.
Explanation:
brainliest plz
2. A person standing at
the edge of a seaside
cliff kicks a stone over
the edge with a speed of
18 m/s. The cliff is 52 m
above the water’s surface, as shown at right.
How long does it take
for the stone to fall to
the water? With what
speed does it strike the
water?
Neutrons have a ____ charge
Answer:
Neutrons have no charge
Explanation:
Answer:
Neutrons don't have a charge....
Explanation:
Hope this helped!!!
PLEASE HELP 2 or 3 SENTENCES PLSLSLSLSL
How have scientists, inventors and / or engineers used the properties of States of Matter to benefit our society?
Answer:
threy need to do it. becuse they do
Explanation:
If a ball is rolled down a frictionless inclined plane from a height of 3 feet, to what height would it roll up to on the other side?
Answer:
It will roll up to its initial height from which it rolled from on the first hill
Explanation:
The given information are;
The height from which the ball is rolled = 3 feet[
The equation of the potential energy of the ball as it rolled down the frictionless inclined plane is given by the following equation;
m × g × h₁ = 1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r]
Where;
m = The mass of the ball
h = The from which the ball is rolled down
v = The velocity of the ball
r = The radius of the ball
Therefore, all the potential energy, m × g × h, is converted into kinetic energy when the ball reached the ground
Similarly, as the ball rolls up on the other side, by the principle of energy conservation, all the kinetic energy is transformed into potential energy as follows
1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₂, therefore, we have;
1/2 × m × v² + 1/2×[2/5× m × r²) × [v/r] = m × g × h₁ = m × g × h₂
Therefore since m × g × h₁ = m × g × h₂, then h₁ = h₂, the ball rises to the same height it started rolling from on the first hill.
How are representative democracies and direct democracies similar?
In both, elected officials meet to make laws.
The power lies with the people in both types of government.
Both types of government work well in countries with large populations.
In both, citizens often represent themselves in voting on government decisions.
BRAINLYIST IS THE REWARD
Answer:
The answer is Both types of government work well in countries with large populations.
Explanation:
Answer:
its d
Explanation:
A gymnast pushed down on a trampoline during a routine. What is the reaction
force on the gymnast?
a) Friction pushes the gymnast forward across the trampoline.
b) Gravity pulls down on the gymnast.
c)Air resistance pushes back on the gymnast
d) The trampoline pushes back up on the gymnast.
Answer:
d) The trampoline pushes back up on the gymnast.
Explanation:
According to Newton's third law of motion; for every action force, there is an equal and opposite reaction force. The action force and reaction force are reciprocal to one another i.e. they act oppositely to one another. The reaction force acts in an opposite direction to the action force and vice versa.
In this question, a gymnast pushed down on a trampoline during a routine. This is called the ACTION FORCE. In conformity to Newton's third law, the trampoline pushes back up on the gymnast. This opposite force is called the REACTION FORCE.
Answer:
D) the trampoline pushes back up they gymnast
Explanation:
Bill is making waves on a rope with one end attached to a wall. When he starts moving the rope quickly, the frequency of the waves created on the rope doubles. What happens to the energy that is transferred to the wall when the frequency of the waves doubles?
a. halved
b. quadrupled
c. doubled
d. tripled
Answer:
The answer is C
Explanation:
The same amount of force is applied to both the wall and the rope
When the frequency of the wave is doubled the energy that is transferred to the wall will be doubled.
What is the frequency?Frequency is defined as the number of repetitions of a wave occurring waves in 1 second.
Bill is making waves on a rope with one end attached to a wall. When he starts moving the rope quickly, the frequency of the waves created on the rope doubles.
The energy that is transferred to the wall is propotional to the frequency of the waves.
Hence the energy that is transferred to the wall will be doubled.
To learn more about the frequency reference the link;
https://brainly.com/question/14926605
An object is dropped from rest.
Calculate its velocity after 2.5 seconds
What is better for measuring how hard you are actually working, Target Heart Rate or Rating of perceived exertion?
Answer:
Rating of percieved exertion
I NEED HELP SOLVING THIS!!!!!!!!!!!!
Jose Altuve hits a fastball with a velocity of 49.1 m/s (109.9 mph) at an angle of 22º. If left field is 96 m (315 ft) away, will this be a home run?
Answer:
Yes
Explanation:
The given parameters are;
The speed with which the fastball is hit, u = 49.1 m/s (109.9 mph)
The angle in which the fastball is hit, θ = 22°
The distance of the field = 96 m (315 ft)
The range of the projectile motion of the fastball is given by the following formula
[tex]Range = \dfrac{u^2 \times sin(2\cdot \theta)}{g}[/tex]
Where;
g = The acceleration due to gravity = 9.81 m/s², we have;
[tex]Range = \dfrac{49.1^2 \times sin(2\times22^{\circ})}{9.81} \approx 170.71 \ m[/tex]
Yes, given that the ball's range is larger than the extent of the field, the batter is able to safely reach home.
Light passing through the center of a lens will carry on undeviated.
Select one:
a. False
b. True
Answer: true
Plz mark brainliest:)
