What makes the results of a scientific experiment accurate? (5 points)
Answer:
A measurement is reliable if you repeat it and get the same or a similar answer over and over again, and an experiment is reliable if it gives the same result when you repeat the entire experiment.
Explanation:
Answer: when you repeat it and get the same results
Explanation:
When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and gets very similar results then those results are said to be reliable. Reliability is measured by a percentage – if you get exactly the same results every time then they are 100% reliable.
How much gravitational energy does a 65 kg skydiver have 650 m up in the sky?
Answer:
G.P.E = 414050 Joules or 414.05 Kilojoules
Explanation:
Given the following data;
Mass = 65 kg
Height = 650 m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.m represents the mass of an object. g represents acceleration due to gravity measured in meters per seconds square. h represents the height measured in meters.Substituting into the equation, we have;
[tex] G.P.E = 65 * 9.8 * 650 [/tex]
[tex] G.P.E = 414050 [/tex]
G.P.E = 414050 Joules or 414.05 Kilojoules.
Which of the following refers to a force of resistance that acts on an object
when the object moves against other matter?
O A. Balanced force
B. Inertia
C. Friction
D. Contact force
A sphere of mass m1 is attached to an ideal spring, then pulled downward from its equilibrium position and released from rest. A sphere of mass m2 is hung from a massless string of length L, pulled to the right from its equilibrium position, and released from rest. If both spheres have the same period of oscillation, then what is the spring constant of the spring attached to m1
Answer:
k = [tex]\frac{g \ m_1}{L}[/tex]
Explanation:
In this exercise the two cases presented are a simple harmonic motion, with angular velocity
spring - mass w² = k / m₁
simple pendulum (string- mass m₂) w² = g / L
angular velocity and period are related
w = 2π/ T
since they indicate that the two periods are equal, the angular velocities are also equal, therefore we can equal the two equations
[tex]\frac{k}{m1} = \frac{g}{L}[/tex]
k = [tex]\frac{g \ m_1}{L}[/tex]
help asap!
three resistors of 20. ohms, 30. ohms, and 60. ohms, respectively, are connected in series with a battery. a current of 2.0 amperes will flow through this circuit when the potential difference of the battery is a. 20.V b. 220 V c. 110 V d. 10.V.
Answer:
220 V
Explanation:
[tex]r_{1} = 20 ohm\\r_{2} = 30ohm\\r_{3} = 60ohm[/tex]
As the resistors are connected in series,
[tex]R_{eq} = r_{1} +r_{2} +r_{3}[/tex]
= 20 + 30 + 60
= 110 ohms
V = IR
= 2 * 110
= 220 V
Hope it helps
What do you think we can learn about Earth's history by looking at the Grand Canyon?
If F=15 N, a=3 m/s², m=? *
45 Kg
5 kg
0.2 kg
0 kg
Answer:
5 kg
Explanation:
Wax, like all matter, comes in many phases. What are the three possible
phases?
A. Mixtures
B. Gas
C. Liquid
D. Solid
Multiple choice pls help
Answer:
A and d
Explanation:
Mixture and solid
.
Look at the circuit diagram. What type of circuit is shown?
closed parallel circuit
closed series circuit
open parallel circuit
open series circuit
Describe the general relationship between the weight of adult men and the average number of Calories needed daily to maintain a steady weight.
Answer:
The average number of calories needed daily represents the average quantity of calories eliminated by human body due to metabolism and must be compensated by eating and drinking.
The amount of calories contained in the food we eat every day must represent the amount of calories eliminated by the body in that time to have a steady weight.
Explanation:
The average number of calories needed daily represents the average quantity of calories eliminated by human body due to metabolism and must be compensated by eating and drinking. If total quantity of calories in the food we consume every day is higher that the average number of calories needed daily, then weight increases by fat accumulation.
The charge of a transition metal cation is determined using the known charge on the element being combined with the transition metal.
Please select the best answer from the choices provided
T
F
Answer:
True
Explanation:
You can easily determine the charge of transition metal ions in neutral compounds, as long as you know the charge or oxidation state of the atoms that partner with the transition metal.
Answer:
T
Explanation:
Which type of lens is shown in the picture below?
plane
refractional
concave
Pam is running in a race at 3.3 m/s and accelerates at a rate of 3 m/s for the last 15 meters. How fast is she running when she crosses the finish line?
Answer:
Pam's velocity when she crosses the finish line is 10 m/s.
Explanation:
Given;
initial velocity of Pam, u = 3.3 m/s
acceleration of Pam, a = 3 m/s²
last distance covered, d = 15 m
let her final velocity = v
Apply the following kinematic equation to determine Pam's final velocity;
v² = u² + 2ad
v² = 3.3² + 2(3)(15)
v² = 10.89 + 90
v² = 100.89
v = √100.89
v = 10 m/s
Therefore, Pam's velocity when she crosses the finish line is 10 m/s.
¿Por qué el Cirque du Soleil es una organización? ¿Qué características tiene?
Which nucleus completes the following equation?
Answer:
its b
Explanation:
What is role of force on the speed of moving object?
Explanation:
this is the ans hope it works
Answer:
Forces make things speed up (or accelerate). When a force pushes or pulls the object, the object will move in the direction of the force. The bigger the force, and the lighter the object, the greater the acceleration.
Explanation:
The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction. Since any change in velocity is considered acceleration, it can be said that a force on an object results in the acceleration of an object.
A simple mathematical relationship exists between the mass of an object (m), the net force on the object (f) and its acceleration (a). The acceleration of an object is directly proportional to the net force and indirectly proportional to the object’s mass (a = f/m).
If two lines in a system of linear equations have the same slope and same y-intercept, how many solutions will the system have?
Answer:
We will have infinite solutions to the system of linear equations.
Explanation:
Well, when we have two lines with the same slopes and the same y-interception, both of them are overlapped, so we will have infinite solutions to the system of linear equations.
This kind of system is called dependent system.
I hope it helps you!
I really need help
John's mass is 55kg when he is standing on the edge of a diving
board 24m high. a. Find his mechanical energy.
What is it?
Answer:
E = 12.9 kJ
Explanation:
Given that,
Mass of John, m = 55 kg
It is standing on the edge of a diving board which is at a height of 24 m.
We need to find his mechanical energy. The mechanical energy of John is equal to its potential energy such that,
E = mgh
E = 55 kg × 9.8 m/s² × 24
E = 12936 J
or
E = 12.9 kJ
So, his mechanical energy is equal to 12.9 kJ.
consider the circuit. find the equivalent resistance
Answer: 18 5.0 012
Explanation:
An astronaut wandering the solar system encounters a 726 kg steel block resting
on a surface where (meau) s = 0.650 and k = 0.400. An attempt by the astronaut to set
the steel block in motion across the surface requires a force of 4930 N. On
which planet is this astronaut wandering? Support your answer with calculations.
Answer:
Therefore the planet is Saturn .
Explanation:
Let acceleration due to gravity be g .
weight on the planet = 726 g
Frictional force = μs mg
= .65 x 726 x g
This force is equal to 4930 N .
.65 x 726 x g = 4930 N .
g = 10.44 .
Therefore the planet is Saturn .
A 2.24x10^3 kg car slows down uniformly from 20.0 m/s to a stop (assume constant acceleration) via a braking force of 8.41x10^3 N . How far did the car travel during this time?
Answer:
Explanation: 139 m
A block attached to an ideal spring oscillates horizontally with a frequency of 2.0 Hz and amplitude of
0.25 m. The spring constant is 75
What is the mass of the block?
Answer: 0.47 kg
Explanation:
Which is the most accurate description of how the coolant works in an engine?
O Coolant absorbs thermal energy.
O Combustion absorbs thermal energy.
O Coolant absorbs chemical energy.
O Combustion absorbs chemical energy.
Answer:
A. coolant absorbs thermal energy.
Explanation:
Got it right on Edg
An object with a mass of 1298 kg is accelerating at a rate of 17 m/s² when a net force is applied to it. What is the magnitude of the net force that is acting on the object?
Answer:
Explanation:
This is a simple F = ma equation. We have the mass and we have the acceleration, so
F = 1298(17) and
F = 22066 which rounds correctly to
F = 22000N
The magnitude of the net force of object with a mass of 1298 kg is accelerating at a rate of 17 m/s² is 22066N
HOW TO CALCULATE NET FORCE:
The net force of a body can be calculated by multiplying the mass of the body by its acceleration. That is;Force (N) = mass (kg) × acceleration (m/s²)According to this question, an object with a mass of 1298 kg is accelerating at a rate of 17 m/s². The net force can be calculated as follows:F = 1298Kg × 17m/s²F = 22066NTherefore, the magnitude of the net force of object with a mass of 1298 kg is accelerating at a rate of 17 m/s² is 22066N.Learn more at: https://brainly.com/question/23245710?referrer=searchResults
According to the passage, why don’t sharks sink in the water?
A Sharks don’t sink because they eat seals and sea lions.
B Sharks don’t sink because their liver is filled with oil.
C Sharks don’t sink because the water is polluted.
D Sharks don’t sink because they are very light
please help me for 20 points
Answer:
B
Explanation:
Answer:
B
Explanation:
In contrast to other fish, who have bladders filled with gas, sharks have a liver filled with low-density oil that is similar to vegetable oil. This oil is lighter than water and tends to rise to the top of the water if not contained but because it is in the sharks liver its contained therefor the shark floats!
2nd grade work. Anyone?
Which of these can move without being pushed or pulled?
shadow
road sign
kitten
bubble gum
Answer:
A. shadow
Explanation:
Answer: A is the correct answer!
Explanation:
hello help me please :)
Answer: 75 N
Because we're finding the force, we need to use F = ma. M (Mass) = 25 and A (Acceleration) = 3. Multiply 25(3) to get 75. So, you're answer should be 75 N.
what produces magnetic fields
Answer:
B is the answer
Explanation:
Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.
ASAP!!!!!! I need help is my final
Answer:
bro the answer would be 15m/s north
Explanation:
;)
Why is diffraction used in soil profiles?
Answer:X-ray diffraction (XRD) is the technique most heavily relied on in soil mineralogical analysis. X-ray diffraction is a technique that provides detailed information about the atomic structure of crystalline substances. It is a powerful tool in the identification of minerals in rocks and soils.
Explanation:
XRD is used to identify the minerals composing clay-rich, hydrothermally altered rocks that occur on several Cascade volcanoes. Such rocks are believed to play an important role in the generation of large landslides and mudflows. XRD is used to analyze saline minerals, including borates.