Answer:
17.84 m/s.
Explanation:
From the question given above, the following data were obtained:
Angle of projection (θ) = 25°
Maximum height (H) reached = 2.9 m
Acceleration due to gravity (g) = 9.8 m/s²
Initial velocity (u) =..?
Thus, we can obtain the initial velocity of the lure as follow:
H = u² sine² θ /2g
2.9 = u² × (sine 25)² / 2×9.8
2.9 = u² × (0.4226)²/19.6
Cross multiply
u² × (0.4226)² = 2.9 × 19.6
u² × (0.4226)² = 56.84
Divide both side by (0.4226)²
u² = 56.84/(0.4226)²
u² = 318.27
Take the square root of both side
u = √318.27
u = 17.84 m/s.
Therefore, the initial velocity of the lure is 17.84 m/s.
1.
Which of the following process is /are evaporation process
A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground
-the acceleration increases
-the acceleration decreases
-the acceleration remains constant *
Answer:
The correct option is;
The acceleration remains constant
Explanation:
The acceleration is due to the force of gravitational attraction between the text book and the Earth
According to Newton's law of gravitation, there is an attractive force between all objects given by the following relation;
F = G×M₁×m₂/r²
Where;
G, M₁, m₂, and r are constant such that we have;
G×M₁/r² = Constant = The acceleraton due to gravity, g
F = g×m₂
So the acceleration of the textbook as it is being attracted by the force of gravity towards the ground (Earth) is remains constant.
A plane's average speed between two cities is 625 km/hr. If the trip takes 2.5 hours, how far does the plane fly?
Answer: 1,562.5 Km
Explanation: If it takes one hour to travel 625 kilometers, then, in two and a half hours, you should travel 1,562.5 Kilometers because of 625x2.5=1562.5 kilometers
Scientists have data for the density of gas particles at
different levels of the atmosphere. This diagram shows the
trend in that data.
Which statement describes the pattern in the density of gases in the
atmosphere?
A. They are evenly dense throughout the atmosphere.
B. They are less dense near the top of the atmosphere.
C. They are densest near the middle of the atmosphere.
D. They are least dense in the atmosphere near sea level.
Answer:B. They are less dense near the top of the atmosphere
Explanation:
A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the ball to reach its maximum height. Find (a) the ball’s initial velocity and (b) the maximum height it reaches.
Answer:
initial velocity is0m/s and final velocity is29.4m/s
Who are people that you can go to for help name three?
Answer:
parent
teacher
peer
Explanation:
Focus Question: What are SI units, and why are they used?
In 1999, NASA lost the Mars Climate Orbiter because one team used English units
(inches, feet, and pounds) while the other used metric units for a key spacecraft
operation. That was a $125 million dollar mistake... oops! Distance can be measured in
inches, feet, yards, miles, or meters. So, how do scientists know which to use?
Since there are different ways to measure things, scientists and engineers use the
International System of Units, known as Sl units, in order to stay on the same page. This
is important whether you are measuring speed, distance, temperature, or anything else!
To avoid confusion, always show what units of measurement you are using.
.
Answer:
a system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Explanation:
The problem here was not the error; it was the failure of NASA's systems engineering, and the checks and balances in our processes, to detect the error. That's why we lost the spacecraft.
How do you test hydrogen gas
Explanation:
A splint is lit and held near the opening of the tube, then the stopper is removed to expose the splint to the gas. If the gas is flammable, the mixture ignites. This test is most commonly used to identify hydrogen, which extinguishes with a distinctive 'squeaky pop' sound.
Answer:
You can test for hydrogen gas by putting a burning splinter near the gas. The splinter will gives out a 'pop' sound (mini explosion) if it is hydrogen gas
An astronaut holds a rock 100m above the surface of Planet XX. The rock is then thrown upward with a speed of 15m/s, as shown in the figure. The rock reaches the ground 10s after it is thrown. The atmosphere of Planet XX has a negligible effect on the rock when it is in free fall. Determine the acceleration due to gravity of the rock when it is on Planet XX.
Answer:
Explanation:
Using the equation of motion to get the acceleration due to gravoty of the rock on the planet.
S = ut+ 1/2at² where;
S is the distance of the rock above the surface of the planet = 100m
u is the initial velocity = 15m/s
a is the acceleration due to gravity
t is the time taken by the rock to reach the ground = 10s
Since the rock is thrown upward the acceleration due to gravity will be negative i.e a= -g
The equation becomes S = ut- 1/2gt²
Substituting the given value to get the time t
100 = 15(10)- 1/2g(10)²
100 = 150-50g
100-150 = -50g
-50 = -50g
g = -50/-50
g = 1m/s²
Hence the acceleration due to gravity of the rock when it is on Planet XX is 1m/s²
A student walks 100 m East and 100 m North. What is their distance traveled?
-- The student's distance traveled is 200 meters.
-- The student's displacement is 141 meters Northeast.
When elements gain electrons (negative friends), they become more ________
A. positive
B. neutral
C. negative
PLEASE HURRY
Which correctly lists three properties that are used to identify minerals?
A. luster, weight, streak
B. magnetism, size, weight
C. size, weight, luster
D. streak, luster, magnetism
Answer:
D.Streak,Luster,Magnetism
Explanation:
Answer:
D. streak, luster, mangnetism
Explanation:
Cuz i took test on edge
A car capable of a constant acceleration of
3.72 m/s
2
is stopped at a traffic light. When
the light turns green, the car starts from rest
with this acceleration. At the very same moment, a truck traveling with constant velocity
13.8 m/s passes the car.
As the car’s velocity increases, it will eventually move faster than the truck and later
overtake it. How far from the light will the
car catch up with the truck?
Answer in units of m.
Answer:
sorry we don't understand what about of your question is
Explanation:
sorry we don't have a great weekend
2. (01.02)
Choose the best definition for the following phrase: like terms (1 point)
Options:
A Letter that holds the place for some unknown value in mathematics.
A process where you must look for terms that have identical variable parts and then combine their coefficient
A process where if two things are equal, one can be put in the place of the other and nothing will change
Terms that have identical variable parts
Answer:
A process where you must look for terms that have identical variable parts and then combine their coefficient.
can anyone pls help me out in dis!!!!!
Answer:
C
Explanation:
The fume hood's ventilation system pulls fumes and fire away from you and the lab, it is safer.
A. Shape the pot so that it has a wider base and the same size rim.
B. Shape the pot so that it has a wider base and a wider rim.
C. Shape the pot so that it has the same size base and a wider rim.
O D. Shape the pot so that it has a narrower base and the same size
rim.
Answer:
Answer =
Explanation:
Option A
Plz Mark as brainliest
A car slows from 90mi/he to 55mi/hr when it sees the police what's the cars acceleration
What level of certainty do you have that the sun will rise tomorrow
my certainty is 99.999999% because the earth has been around for about 4 quadrillion years or more and the sun has risen on almost every single one of them, so the odds of the sun not coming up are very very low.
Answer:
100%
Explanation:
define velocity and also write their mathematical expression
An example of a hidden variable would be
2. A ball is released from a vertical height of 20 cm. It rolls down a "perfectly
frictionless" ramp and up a similar ramp. What vertical height on the second
ramp will the ball reach before it starts to roll back down?
Answer:
20 cm
Explanation:
Given that a ball is released from a vertical height of 20 cm. It rolls down a "perfectly frictionless" ramp and up a similar ramp. What vertical height on the second ramp will the ball reach before it starts to roll back down?
Since it is perfectly frictionless, the Kinetic energy in which the ball is rolling will be equal to the potential energy at the edge of the ramp.
Therefore, the ball will reach 20 cm before it starts to roll back down.
A statement made prior to an experiment, and based on little scientific evidence, is
called a(n)
a) hypothesis
c) theory
b) prediction
d) all of the above
What is the location for the valence electron(s) for an atom of Barium, Ba?
O 2 electrons in energy level 3
O 2 electrons in energy level 6
O 6 electrons in energy level 2
O 1 valence electron in energy level 6
Answer:
2 electrons in energy level 6
How do I find out where two cars intersect when I am given velocity for the red car 14.41cm/s and the starting point for the red car 0.6m. I am also given velocity for the blue car 41.32cm/s and the starting point at 0m.
Explanation:
Write equations for the position of each car as a function of time. (Make sure to convert units if they're different.)
The red car's position x at time t is:
x = (14.41 cm/s) t + 60 cm
The blue car's position x at time t is:
x = (41.32 cm/s) t
To find when they meet, set the equations equal to each other.
(14.41 cm/s) t + 60 cm = (41.32 cm/s) t
60 cm = (26.91 cm/s) t
t = 2.230 s
Calculate the velocity of an object thrown straight up with an initial velocity of 25 m/s at 1.0 seconds.
Answer:
15 m/s
Explanation:
Given:
v₀ = 25 m/s
a = -10 m/s²
t = 1.0 s
Find: v
v = at + v₀
v = (-10 m/s²) (1.0 s) + 25 m/s
v = 15 m/s
What type of energy is stored in chemical bonds of molecules ?
Answer:
potential energy,
Explanation:
Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.
The energy stored on the chemical bonds of molecules is chemical energy. When the chemical bonds are broken, the energy is released.
What is chemical energy?Chemical energy is a form of energy which is stored in the form of chemical bonds. There are various other forms of energy such as electrical energy, mechanical energy, kinetic energy etc.
There are different types of chemical bonds such as ionic bonds, covalent bonds, metallic bonds etc. Each type of bond are of different bond strength and energy.
Molecules are formed by the combination of atoms through chemical bonding. Chemical energy is stored within the bonds and this energy releases when the bond breaks.
To find more on chemical energy, refer here:
https://brainly.com/question/1397271
#SPJ6
What is the instantaneous velocity of B?
What is the instantaneous acceleration at F?
Answer:
B:0
F:1.33
Explanation:
velocity of B is 0 m/s
you can refer to the graph
acceleration of F =slope of F
4/3=1.33 m/s^2
A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answer:
h = 384.4 m
t = 8.5 s
Explanation:
The firework will explode at the highest point. Because it would start to move downward at the highest point. Using 3rd equation of motion:
2ah = Vf² - Vi²
where,
a = acceleration due to gravity at that planet = -10.56 m/s²
h = maximum height = ?
Vf = Final velocity = 0 m/s (since, firework stops at highest point)
Vi = Initial Velocity = 90.1 m/s
Therefore,
2(-10.56 m/s²)(h) = (0 m/s)² - (90.1 m/s)²
h = 384.4 m
Now, we use 1st equation of motion:
Vf = Vi + at
0 m/s = 90.1 m/s + (-10.56 m/s²)(t)
t = 8.5 s
Define what factors allow a population of a species to grow to a certain size and how they relate to carrying capacity
Answer:
Relationship between population size, carrying capacity, and limiting factors is described below.
Explanation:
1. There are four variables which govern changes in population size.
births
deaths
immigration
emigration
A population gains individuals by birth and immigration and loses individuals by death and emigration.
2. Populations vary in their capacity to grow. The maximum rate at which a population can increase when resources are unlimited and environmental conditions are ideal is termed the population's biotic potential.
3. There are always limits to population growth in nature. Populations cannot grow exponentially indefinitely. Exploding populations always reach a size limit imposed by the shortage of one or more factors such as water, space, and nutrients or by adverse conditions such as disease, drought and temperature extremes.
4. The factors which act jointly to limit a population's growth are termed the environmental resistance. The interplay of biotic potential and density-dependent environmental resistance keeps a population in balance.
5. Carrying Capacity
For a given region, carrying capacity is the maximum number of individuals of a given species that an area's resources can sustain indefinitely without significantly depleting or degrading those resources. Determining the carrying capacities for most organisms is fairly straightforward. For humans carrying capacity is much more complicated. The definition is expanded to include not degrading our cultural and social environments and not harming the physical environment in ways that would adversely affect future generations.
6. Population Impact
Homo sapiens is a species possessing a diversity of individual needs. Thus, sub-populations will have different requirements and different impacts on the environment. For example 100 million vegetarians will have a significantly different environmental impact than 100 million meat-eaters. This can be demonstrated by comparing the affect on water supplies by both sub-populations. About 1000 tons of water are needed to produce 1 ton of grain. Almost 40% of all grain is used in meat and poultry production. Add to this the amount of water that goes into the production of meat, and you can see that meat comsumption places more stress on global water supplies than grain consumption.
Hope this helps (: Mark me brainliest if its good to you.
A car drives 10km with a speed of 72 km/hr and then runs out of gas. Then you walk 2km for the next 30 min
until you find a gas station.
Given :
A car drives 10 km with a speed of 72 km/hr and then runs out of gas.
Then you walk 2 km for the next 30 min until you find a gas station .
To Find :
The average speed of whole journey .
Solution :
Average speed is given by :
[tex]v_{avg}=\dfrac{\text{Total distance covered}}{\text{Total time taken}}\\\\v_{avg}=\dfrac{10+2}{\dfrac{10}{72}+\dfrac{1}{2}}\\\\\\v_{avg}=18.78\ km/hr[/tex]
Hence , this is the required solution .
