Answer:
3 seconds is the average speed between 1 and 5
Lucifer is in a train traveling initially at 5.48 m/s west when she begins to accelerate west at the rate of 0.892 m/s/s for a time of 6.90 s. What is her velocity at the end of the acceleration?
Recall that
[tex]v_f=v_i+at[/tex]
which follows from the definition for average acceleration. So Lucifer has a final velocity of
[tex]5.48\dfrac{\rm m}{\rm s}+\left(0.892\dfrac{\rm m}{\mathrm s^2}\right)(6.90\,\mathrm s)\approx\boxed{11.6\dfrac{\rm m}{\rm s}}[/tex]
Which of the following are not examples of circular motion?
Check all that apply.
A. race car going around a turn in the road
B. basketball falling toward the hoop after being thrown
C. roller skating down a hill
D. earth going around the sun
E. the path of a soccer ball rolling on the ground
Which state of matter has the MOST energy?
Answer:
gas has the most energy! hope that helps :D
Can the volume of a gas be measured?
A. Yes, the volume can be calculated once the mass is determined.
B. No, gas is soluble in liquid so it cannot be determined.
C. Yes, just the measure the volume of the container it is in.
D. No, the volume will always be different so it is inaccurate.
Answer:
C. Just measure the volume of the container it is in
Explanation:
Another why of measuring the volume of gas is by filling a contractor with water then in invert a glass jar air will miss place the space taken by water then measure the volume of water misplaced to get the volume to air
Which of the following is not an essential feature of scientific explanations?
a. They must be subject to testing.
b. They strictly pertain to the physical world.
c. Their validity is judged based on objective observations.
d. Once supported by observation, they can be viewed as a fact.
Answer:
D I think I might be wrong its been a while scense I did something like that
Which has covalent bonds?
A.) glucose
B.) table salt
C.) steel alloy
D.) Iron oxide - rust
Answer:
A.) glucose
Explanation:
Answer:
A. glucose
Explanation:
pay attention to the lesson
An experiment is done to measure the acceleration of free fall of a body from rest. Which measurements are needed?
Answer:
you need the speed and the time it took in order to find the acceleration and you can find the acceleration by using this equation: A= S ÷ T where a is acceleration, s is speed and t is time.
Measurements are needed to measure the acceleration of free fall of a body from rest is the height and time of fall.
let us assume,
the body is falls from some height (h) the Initial velocity would beu = 0
The distance (h) is traveled by the body in the vertical direction with constant acceleration. the total time is taken by the body would be = tAcceleration is constant so, the equation of motion in the perpendicular direction can be applied.
That is,
[tex]y = ut + (1/2) at^2[/tex]
in this case,
y = h and a = acceleration of free fall
Solution:
Putting values in the equation:
[tex]h = 0 + (1/2) at^2\\t^2 = 2h/a \\a= 2h/t^2[/tex]
The correct answer would be the height and time of fall.
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A wildbeest runs with an average speed of 4.0m/s for 15s . What was the distance travelled in meters
Answer:
60.0m im sorry if im wrong but this is what i got
Explanation:
Answer:
The Answer Is 60 m
Explanation:
Distance d = ?
Time t = 15 s
Average speed vavg = 4.0 m/s
You can rearrange the equation vavg = d/t to solve for distance travelled d.
vavg = d/t
d = vavgt
= (4.0 m/s) (15s)
= 60 m
why Venus is known as red planet?
Explanation:
because it appears in the sky as an ORANGE-RED STAR
Answer: Venus and Mars are known as red planets because it appears in the sky as an orange- red star.
Carol's mother has skin cancer. Both Carol and her mother have fair eyes, hair, and skin. Carol read that cancer is a genetic disease and she is concerned that she will also get skin cancer no matter what she does.
2. Explain how other risk factors affect Carol's chances of getting skin cancer.
Answer:
Probably skin cancer
Explanation:
<3
A pot of water is heated on a gas-flame stove and begins to boil. Which two
transfers of thermal energy involved in this system are examples of radiation?
O A. From the burner to air that is not touching it
B. In the surrounding air as air currents develop
C. From the burner to a nearby spoon
O D. From the water to the air
Examples of radiation are from the burner to air that is not touching it. In the surrounding air as air currents develop. The correct options are A and B.
What is radiation?Radiation is the emission or transmission of energy through a material medium or across space in the form of waves or particles. Radiation is the heat transfer method in which the heat is transferred without any direct contact between the two objects.
Given that a pot of water is heated on a gas-flame stove and begins to boil. Which two transfers of thermal energy are involved?
Here the heat is transferred through the radiation in which no direct contact is there between the two objects. The two thermal heat transfer energies are from the burner to air that is not touching it and In the surrounding air as air, currents develop.
Therefore, examples of radiation are from the burner to air that is not touching it. In the surrounding air as air currents develop. The correct options are A and B.
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which statement describes a question that can be answered by a scientific investigation?
Answer:
it is based on an observation of a natural phenomenon
Explanation:
Which of the following are you not likely to see on a graph?
A. Dependent Variable
B.Independent variable
C. A Prediction
D. Units
Answer:
a
Explanation:
It is not possible for a graph to NOT change with the dependent variable never changing.
You are skydiving and accelerating at 9.8 meters per second
squared. If your velocity is 55 meters per second, how long did it take you
to get up to that velocity?
Which of the following is not a component of fitness? A. Cardiovascular fitness B. Muscular endurance C. Pulmonary endurance D. Body composition
Answer:
C. Pulmonary endurance
Explanation:
I'm pretty sure it's "C" because cardiovascular and pulmonary endurance are the same thing and usually you'd hear cardiovascular more than pulmonary.
Sorry if I'm wrong!
Answer:
c
Explanation:
i just took the test
6. An asteroid is traveling in a straight line at a constant speed of 327 m/s. How long will it take for a displacement of 732 km to occur?
A. 0.62 min.
B. 37.3 min.
C. 2.42 hrs.
D. 2.24 sec.
Answer:
the answer is b. 37.3 min..
What is weight?
A. The force of gravity on an object
B. The amount of matter in an object
C. The mass of an object
D. How fast an object falls
Weight is the the force of gravity on an object.
What is weight?Weight in physics is the force on an object due to the gravitational attraction between it and the Earth (or whatever astronomical object it is primarily influenced by).
Weight is often confused with mass, however, weight is a force measured in Newtons (N) rather than in kilograms like mass.
The weight of an object is subjective to its location and it can be calculated from the mass by multiplying the mass by the acceleration due to gravity of the planet it is located.
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An African Bush Elephant can weigh up to 13,000 lbs, how many grams is that?
(Hint - 11b. = .54kg)
Final Answer:
What is the name given to group 18 on the periodic table?
Answer:
Noble gases
also known as group 0
True or False: (2 points) If a scientist finds evidence that contradicts a hypothesis, law, or principle, then it is their choice whether to change the hypothesis, law, or principle.
Answer:
True
Explanation:
A hypothesis is an educated guess, it does not have to be right.
Are the sharks using a contact or non-contact force to detect prey?
Answer:
They use a non-contact force
Explanation:
The shark applies a contact force on the prey. The shark is unable to apply force at a distance. The shark applies a non-contact force on the prey
Answer:
Non-contact
Explanation:
Because Non-contact beans they are not using friction against there bodies.
If u have a old dogs and it starts whining and it's legs lockup ,and wont let u pick it up. What do i do Im s scared?
The dog MUST be SEEN by a vet.
Not on the phone, not from your description. Not a web search, and not asking for advice online.
A qualified veterinarian has to have his hands on the animal, examine the dog, and make some suggestions. It might cost some money.
There's something missing here. A qualified real vet will never just say "I don't know, good bye!".
Which variable is the result of the experiment?
Answer:
independent variable is the answer! hope that helps :D
Answer:
The independent variable is the core of the experiment and is isolated and manipulated by the researcher. The dependent variable is the measurable outcome of this manipulation, the results of the experimental design.
What two factors affect the speed of a sound wave as it travels through a medium ?
Answer:
C, the type of medium and the temperature of the medium
Explanation:
edge 2021
. A book is moved once around the perimeter of a table of dimensions 2.00 m by 3.00 m. If the book ends up at its initial position
a) what is its displacement? 0
Answer:
10
Explanation:
displacement would be 10 because knowledge
A bird flies 20 meters North, 10 meters South, and then 10 meters East. What’s the bird’s displacement? Also, can you explain how you did it? Thank you
Answer:
14.14 metres
Explanation:
Given that a bird flies 20 meters North, 10 meters South, and then 10 meters East.
the bird’s displacement can be calculated by first subtracting the value of distance from the south from the north.
20 - 10 = 10m
The displacement will be achieved by using pythagorean theorem
Displacement = sqrt ( 10^2 + 10^2 )
Displacement = sqrt( 200)
Displacement = 14.14 m
Therefore the displacement of the bird is 14.14 metres.
A stone will sink because it is _____ than water
Answer:
Heavier
Explanation:
The stone is a heavy object, therefor, it'll sink fast
Because stone is much smaller than its gravity force
A 70-kg boy is sitting 3 m from the ground in a tree. What is his gravitational potential energy
m x h x 9.8 m/s squared
70 kg x 3 m x 9.8 m/s squared= 2058 Joules
Describe the two forms of the material that Emily synthesized.
Answer:
hi someone already awnsered this so dont be mad at me awnser is below
awnser: One form has a definite shape, and the other form is soft and flows easily.
Rank the four fundamental forces from strongest to weakest
Answer:gravitational, weak nuclear, electromagnetic, strong
Explanation:
