Answer:
The final velocity of the ball is 39.2 m/s.
Explanation:
Given that,
A ball is dropped from rest from a high window of a tall building.
Time = 4 sec
We need to calculate the final velocity of the ball
Using equation if motion
[tex]v=u+gt[/tex]
Where, v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time
Put the value into the formula
[tex]v=0+9.8\times4[/tex]
[tex]v=39.2\ m/s[/tex]
Hence, The final velocity of the ball is 39.2 m/s.
which term refers to a variable that is not allowed to change during an experiment
Answer:
controlled variable
Explanation:
here you go
A control variable refers to a variable that is not allowed to change during an experiment.
What is the control variable?A control variable or scientific constant can be described as an experimental element that is constant and unchanged throughout the course of the investigation in scientific experimentation.
Control variables can strongly affect experimental results where they are not held constant during the experiment in order to test the relative relationship between the dependent and independent variables.
A variable is held constant in order to assess the relationship between multiple variables in an experiment and is a control variable. A control variable is not changed throughout an experiment because its constant state allows the relationship between the other variables. A control variable is what is kept constant throughout the entire experiment.
Therefore, a variable that is not allowed to change during an experiment is a controlled variable or scientific constant.
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HELP ME PLZ!!!!! I'LL DO ANYTHING!!!!
First find the diameter of each.
Jupiter’s diameter is 86,881 mi.
Earth’s diameter is 7,917.5 mi.
Then divide those two.
Rounded, Jupiter is 11 times larger.
unrounded: 10.9732870224186927691821913482791285127
Finding out how large something is compared to something can be done by dividing.
For example I have two dogs. One dog is 3 feet tall. The other is 2 feet tall. How much taller is dog one? Dog one is 1.5 times larger because 3/2 = 1.5 AND 2 x 1.5 = 3.
So for this case multiplying Earth’s diameter by 10.9732870224186927691821913482791285127 will give you Jupiter’s diameter.
Describe the relationship between air time and range.
Answer: For the angles below 40, The air time and range are directly proportional meaning that if air time increases, the range increases. Like said earlier, the total traveled distance in the x-direction depends on the initial velocity and time.
I will literally Venmo u a dollar If I can solve this lol haahha
Answer: Answer is D
A truck covers 40.0 m in 7.10 s while uniformly slowing down to a final velocity of 2.05 m/s.
(a) Find the truck's original speed. _______ m/s
(b) Find its acceleration. __________ m/s^2
Answer:
(A) Original speed= 9.22 m/s
(B) Acceleration= -1.0099 m\s^2
Explanation:
A truck covers 40m in 7.10 secs
The truck slows down at a uniform velocity of 2.05 m/s
(A) The original speed can be calculated as follows
Vo= 2(40)/7.10 - 2.05
= 80/7.10 - 2.05
= 11.2676 - 2.05
= 9.22m/s
(B) The acceleration can be calculated as follows
a= Vf-Vo/t
= 2.05-9.22/7.10
= -7.17/7.10
= -1.0099m/s^2
1. The speed limit on a particular freeway is 28.0 m/s (about 101 km/hour). A car
that is merging onto the freeway is capable of accelerating at 2.25 m/s2. If the car
is currently traveling forward at 13.0 m/s, what is the shortest amount of time it
could take the vehicle to reach the speed limit? How far would the car travel in
this time?
Answer:
the speed limit 6 seconds and the car will travel in 90m
If a bullet with an acceleration of 1.5 m/s2 takes 2 seconds to leave the muzzle of a rifle (starts at rest), what was the length of the rifles barrel?
Answer:
The length is [tex]D =3 \ m [/tex]
Explanation:
The velocity of the bullet is mathematically evaluated as
[tex]v = a * t [/tex]
=> [tex]v = 1.5 * 2 [/tex]
=> [tex]v = 3 \ m/s [/tex]
Now from kinematic equation
[tex]v^2 = u^2 + 2* a * D[/tex]
Here D is the length of the barrel and u = 0 m/s
So
[tex]3^2 = 0 + 2* 1.5 * D[/tex]
[tex]D = \frac{9}{3} [/tex]
[tex]D =3 \ m [/tex]
a charge of 12 passes through the filament of a car head lamp bulb in 4 s. what is current?
Answer:
3 A
Explanation:
[tex]current = \frac{charge}{time} \\ = \frac{12}{4} \\ = 3 \: amperes[/tex]
Describe voltage in terms of charge and electrons.
PLEASE HELP I WILL GIVE BRAINLIEST
Answer:
Voltage is a measure of how much energy is delivered to charge. At its most basic, an electron (basic charge) is imparted 1.602×10^−19 joules when moved through an electric potential difference of one volt. An electron is then said to have an energy of 1 electronvolt. So, voltage is energy divided by charge.
PLEASE MARK AS BRAINLIEST
Fill in the blank. Bones fitted together in the shape of a give the human body structure.
Answer:
skeletal system
Explanation:
hope its the right answer:))
Answer:
top
Explanation:
A fleeing student covered a distance of 210 meters in 35 seconds. what is the student's speed in meters/second? what is the student's speed in meters/minute?
Explanation:
Given that,
A student covered a distance of 210 meters in 35 seconds.
We need to find the student's speed in meters/second and also in meters/minute.
Speed, v = distance (d)/time (t)
So,
[tex]v=\dfrac{210\ m}{35\ s}\\\\=6\ m/s[/tex]
We know that, 1 minute = 60 seconds
[tex]6\dfrac{m}{s}=6\times \dfrac{m}{(\dfrac{1}{60})\ \text{minutes}}\\\\=360\ \text{meters/minutes}[/tex]
Hence, the student's speed is 6 m/s or 360 meters/minute.
Why is a pendulum hanging off another pendulum called a chaotic system?
Explanation:
If transformations from stabilization are minimal, a double pendulum performs basic geometric motion. The highly nonlinear system, furthermore, becomes radically unstable in its motion as significant displacements are introduced, showing that deterministic processes are not inherently predictable
Which refers to the ends of a magnet where the forces are strongest?
A) attracting forces
B) opposing forces
C) magnetic fields
D) magnetic poles
A material that produces magnetic field are called magnets. Magnetic poles refers to the ends of a magnet where the forces are strongest.
What are magnetic poles?Magnetic poles are the regions at each end of a magnet where the external magnetic field is strongest.
A bar magnet suspended in the Earth's magnetic field orients itself north-south. A north magnetic pole is the north-seeking pole of such a magnet or any similar pole.
Thus, the correct option is D.
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Answer:
D magnetic poles-
Explanation:took test
Explain the haudralic break system
Answer:
A hydraulic braking system transmits brake-pedal force to the wheel brakes through pressurized fluid.
Explanation:
Convert 10,000 inches to miles.
Sal sprints 40 m to the right in 5.5s.
What was his average velocity in m/s?
Answer:
7.27 m/s
Explanation:
You would be dividing 40 (distance) by 5.5 (time) to get the average velocity of 7.27 m/s .
Answer:
7.27
Explanation:
40/5.5=7.27
Which option lists a form of potential energy followed by a form of kinetic energy?
A. Sound energy | nuclear energy
B. Magnetic energy electromagnetic energy
C. Gravitational energy | elastic energy
D. Electromagnetic energy | electrical energy
Answer:
Magnetic energy and electromagnetic energy form of potential energy followed by a form of kinetic energy.
(B) is correct option.
Explanation:
Given that,
Lists a form of potential energy followed by a form of kinetic energy
We know that,
Sound energy :
The movement of energy through object it is called sound energy. When a object produced vibration by force then it moves in wave.
Sound wave is example of kinetic energy.
Nuclear energy :
The store energy in the nucleus of the atom it is called nuclear energy. This energy released when occurs fusion and fission.
Nuclear energy is the example of potential energy
Magnetic energy :
Magnetic energy is a type of potential energy which is depend on distance and position in the magnetic field.
Electromagnetic energy :
Electromagnetic energy is light energy. it is type of kinetic energy.
Gravitational energy :
Gravitational energy is a type of potential energy. It is an energy related with gravity or gravitational force.
Elastic energy :
The store energy in elastic object it is called elastic energy. This energy is a type of potential energy.
Electrical energy :
The movement of electrons is called electrical energy. When electrons move through a wire then it is are called electricity. Electrical energy is type of kinetic energy.
Hence, Magnetic energy and electromagnetic energy form of potential energy followed by a form of kinetic energy.
(B) is correct option.
Answer:
its B
Explanation:
Which of the following is NOT a reason why
mathematics is valuable in science?
what was Galleos contribution to the study of motion ?
Answer:
B ) He was the first to systematically study force and motion.
Explanation:
I seen this one before and know the answer since there's 4 options
The fastest helicopter, the Westland Lynx, can travel 3.33 km in the forward direction in just 30.0 s. What is the average velocity of this helicopter? Express your answer in both m/s and km/hr.
Answer:
The value in m/s [tex]v_{a} = 111 \ m/s [/tex]
The value in km/h [tex]v_{a} = 400\ km/h [/tex]
Explanation:
Generally the average velocity of the helicopter is mathematically represented as
[tex]v_{a} = \frac{\Delta D}{ t}[/tex]
substituting [tex]3.33 km = 33.3*10^3\ for\ \Delta D[/tex] and 30.0 s for t
We have
[tex]v_{a} = \frac{33.3 *10^{3}}{ 30}[/tex]
=> [tex]v_{a} = 111 \ m/s [/tex]
Now converting to km/h
[tex]v_{a} = 111 * \frac{3600 *\frac{s}{h} }{1*10^{-3} *\frac{km}{m}} [/tex]
=> [tex]v_{a} = 400\ km/h [/tex]
your uncle danny just moved into a new apartment and wants to make his famous spaghetti sauce for his new neighbors
Answer:
he invs them
Explanation:
its common sense
Answer:
He invs them.
Explanation:
Find the velocity of a ball traveling 5 meters for 20 seconds.
Formula:
Substitute:
Solution:
Answer:
The answer is
0.25 m/sExplanation:
The velocity of w given body given the distance and time taken can be found by using the formula
[tex]velocity = \frac{distance}{time} \\ [/tex]
From the question
distance = 5 m
time = 20 s
The velocity of the ball is
[tex]velocity = \frac{5}{20} = \frac{1}{4} \\ [/tex]
We have the final answer as
0.25 m/sHope this helps you
Formula: v = d/t
v = velocity
d = distance
t = time
We are given the distance (5 meters) and the time (20 seconds). Solve with these given values.
v = 5/20
v = 1/4 m/s
Best of Luck!
(USE THE GRAPH) Vectors B and C and are shown in the graph. Vector B is multiplied by the scalar 92. What angle does the new vector make with the x-axis?
Answer:
The angle the new vector makes with the x-axis is 33°
Explanation:
By multiplying a vector with a scalar, we multiply the similar components of the two quantities which is the magnitude of the scalar quantity and the magnitude of the vector with the new vector formed will have a magnitude equal to the product of the two magnitudes and the same direction of the original vector as follows;
The magnitude of the vector B = 5.6
The magnitude of the scalar = 92
The product of the two magnitudes = 5.6 × 92 = 515.2
The magnitude of the new vector = 515.2
The direction of the new vector = 33° South of West
Therefore, the angle the new vector makes with the x-axis = 33°.
What makes human travel to the other planets in our solar system difficult?
Answer:
Taking water and oxygen from Earth is rather expensive and hard to do.
Explanation:
Without water and oxygen, travel to other planets is basically impossible
An ant is Dragging a Housefly and Elephant is pushing a big tree which is not moving. who is doing work? The ant or the elephant? Justify Your Answer!
Answer:
the ant
Explanation:
because work is done when there will be involvement of displacement in the direction of the force.
Answer:
The ant is doing work but the elephant is not
Explanation:
Work done = Force × Displacement
In case of ant and housefly,
Ants are dragging the housefly , so they are displacing the housefly from one point to the other by applying certain force , so we can say that they are doing work
In case of elephant and tree,
When the elephant is pushing the tree( applying force) , the tree is not moving which means that there is no Displacement, so work done will be
Work done = Force × Displacement
= Force × 0
= 0
Plz help me. I need urgent Why a magnetic compass is used to determine direction? Why a nail gets magnetized when kept close to magnet? Why two pins get attracted by bar magnet maintain distance between ends?
Answer:
Compasses are mainly used in navigation to find direction on the earth. This works because the Earth itself has a magnetic field which is similar to that of a bar magnet. The compass needle aligns with the Earth's magnetic field direction and points north-south. Also, In a magnet all the domains are oriented in the same direction. In the case of a nail, the domains can be aligned in the same direction causing the nail to become magnetic. That is because if you hang a bar magnet from a thread, the north pole will point to magnetic north. When you bring one north pole close to another north pole they repel each other. You can feel the two magnets pushing each other apart.
An open system starts with 52 J of mechanical energy. The energy changes
to 45 J of mechanical energy and 2 J of thermal energy. What is the final total
energy of the system?
A. 50 J
B. 54 J
C. 47 J
O D. 9 J
Answer:
ITS C 47
Explanation:
what does it mean to be a base physical quantity
Answer:
Hello! :)
Explanation:
A base quantity (or basic quantity) is chosen and arbitrarily defined, rather than being derived from a combination of other physical quantities. The 7 base quantities are: SI units are used as standardised units in all measurements in the world. SI is the short form for “International System of Units”
Hope This Helps!!!
Three balls are used to model the Sun-Earth-Moon system. Which statement describes a benefit of this model?
Options are not given in the question, so the complete question is as follows:
Three balls are used to model the Sun-Earth-Moon system. Which statement
describes the benefit of this model?
A. The model shows only how eclipses happen.
B. It shows information about a system too large to be studied easily.
C. It shows information about a system too fast to be studied directly
D. The model can be used for the entire solar system.
Answer:
B. It shows information about a system too large to be studied easily.
Explanation:
The use of balls in the model makes it easy to understand the large solar system.
The solar system is comprised of the sun, moon, planets, and other celestial bodies. The model using three balls makes it easy to understand a large system. Using these balls many things about the solar system can be learned such as the position of the Sun-Earth-Moon, the phenomenon of rotation and revolution, and eclipses.
So, the given models show that a large solar system can be studied easily.
Hence, the correct option is "B".
Answer:
B. It shows information about a system too large to be studied easily.
Explanation:
TRUE or FALSE? If a moving object experiences an unbalanced force, then the
object will have an acceleration that is in the same direction as the unbalanced
force.
True I guess
because if the force is balanced and there is no net force, the object will not accelerate and the velocity will remain constant...
Not sure