Answer:
Newtons First Law (The Law of Inertia)- If an object is at rest it will stay at rest until a net force acts on it. If an object is in motion it will stay in motion until a net force acts on it.
Newtons Second Law (F=ma)- Force equals the mass of an object times it's acceleration.
Newton's Third Law- For every action there is an equal and opposite reaction.
hope this helps!
Which of the following is certain to change as a ball
accelerates?
A mass of the ball
B inertia of the ball
C velocity of the ball
Dforce acting on the ball occasionally
Answer:
C. Velocity of the ball
Explanation:
This is because as the acceleration of the ball increases, there will be an increase in the velocity rate and decrease in the time.
See the formula,
a=m/s²
1.020 please help!!
Mark brainliest
Answer:
0.0035 mg
Explanation:
1 mcg = 1e-3 mg
》35 mcg = 35×10^-3 mg
= 0.0035 mg
What would make oppositely charged objects attract each other more?
o increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
O decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged object
O increasing the distance between the positively charged object and the negatively charged object
O maintaining the distance between the positively charged object and the negatively charged object
Answer:
a: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
Explanation:
The oppositely charged objects attract each other more is option a. It increased the positive charge and the negative charge.
The Attraction of the oppositely charged:At the time when the oppositely charged objects are attracted to each other more so here the positive charge should be increased with respect to the positive charge object and the negative charge is increased with respect to the negative charge object
Hence, the first option is correct.
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Something that accelerates undergoes a
A. Change in velocity per unit time
B. Change in direction
C. Change.
D. Change in velocity
Change in velocity per unit time.
Explanation
Acceleration is defined as rate of change of velocity w.r.t time.
[tex]\boxed{\sf Acceleration=\dfrac{dv}{dt}}[/tex]
A difference between final and original position in a straight line
Answer:
For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.
EXPLANATION:For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.
Example of optical object
Answer:
Telescope,cameras
Hope it helped
Which statement is true?
The combustion of biomass can replace fossil fuels in conventional power plants.
Hydroelectric energy uses the energy from the sun, which is a renewable resource.
Oil is a non-renewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply.
Solar energy is a non-renewable resource that is used by many countries all over the world.
Answer:
Hello,
The combustion of biomass can replace fossil fuels in conventional power plants, which is true.
I hope I helped you :)
List three forms of energy and how used
1. After 2 hours, the displacement of a car is 150 km north. The initial displacement of the car is 0. What is the average velocity of the car
Total displacement of the car = (0+150) Km = 150 Km
Total time taken = 2 hours
Average velocity = 150/2 Km/h = 75 Km/h
A car travels 150 km in the north direction and it takes 2 hours to cover the distance then the velocity of the car will be 75 km/hr.
What is Velocity?Velocity is the rate at which a moving object's direction changes as perceived from a certain vantage point and measured by a particular unit of time. Kinematics, the area of special relativity that investigates how bodies move, starts with the fundamental idea of speed.
In order to be explained, the scientific vector quantity known as velocity needs to have both a magnitude and a direction.
As per the provided information in the question,
The total displacement, D = 150 km north.
Total time is taken by the car, t = 2 hours.
Then, the velocity (v) of the car will be,
v = D/t
v = 150/2
v = 75 km/hr.
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A truck travels 40 m while slowing down from 15 m/s to 10 m/s. How long does it take to do this?
Answer:
4s
Explanation:
image formed in a concave
The following diagram shows a
mirror.
object
image
O A. virtual, enlarged, upright
B. real, reduced, upright
C. virtual, enlarged, inverted
D. real, reduced, inverted
The image formed by the concave mirror is virtual, enlarged, and upright. The correct answer is option A.
A concave mirror is a type of spherical mirror that has a reflecting surface that curves inward, resembling the shape of the inner surface of a sphere. The inner surface of the mirror is reflective, while the outer surface is transparent.
Concave mirrors are also known as converging mirrors because they cause parallel incident light rays to converge or come together after reflection. These mirrors are commonly used in various optical devices, such as telescopes, makeup mirrors, and reflector headlights.
Option A states that the image formed by the concave mirror is virtual, enlarged, and upright. Let's break down what each of these terms means in the context of the image formation by a concave mirror:
1. Virtual: A virtual image is formed when the light rays appear to diverge from a point behind the mirror. It cannot be projected onto a screen since the light rays do not actually converge at the image position. In the case of a concave mirror, when the object is located between the mirror and the focal point, a virtual image is formed.
2. Enlarged: An enlarged image is one that appears larger than the object itself. In this case, since the image is virtual, it appears to be larger than the actual size of the object.
3. Upright: An upright image is one that has the same orientation as the object. In the case of a concave mirror, when the object is located between the mirror and the focal point, the image formed is upright.
Therefore, the correct option is A, the image formed by the concave mirror is virtual, enlarged (appears larger than the object), and upright (has the same orientation as the object).
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If the displacement of an object is given in SI units by Dx = -3 t + 4 t 2, at t = 2 s its velocity and acceleration are, respectively:
a) positive, positive.
b) negative, positive.
c) negative, negative.
d) positive, negative.
(A)
Explanation:
If the displacement is given by
[tex]D_x = -3t + 4t^2[/tex]
Then its velocity [tex]v_x[/tex] and acceleration [tex]a_x[/tex] are then
[tex]v_x = \dfrac{dD_x}{dt} = -3 + 8t[/tex]
[tex]a_x = \dfrac{dv_x}{dt} = 8[/tex]
Evaluated at t = 2, we see that [tex]v_x = 13[/tex] and [tex]a_x = 8[/tex] and both of them are positive. Therefore, the answer (a).
Answer:
QUESTION
If the displacement of an object is given in SI units by Dx = -3 t + 4 t 2, at t = 2 s its velocity and acceleration are, respectively:
[tex]==============================[/tex]
ANSWER
a) positive, positive
[tex]==============================[/tex]
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Which of the following does not represent a question that can be answered by science?a. How much energy is released in a given nuclear chain reaction? b. Can a nuclear chain reaction be controlled? c. Should uncontrolled nuclear reactions be used for military applications?
d. What is the half-life of a waste product of a nuclear reaction?
Answer:
c. Should uncontrolled nuclear reactions be used for military applications?
Explanation:
The question on wether to use technology for military applications, is not a science question but a moral dilemma
The question that can not be answered by science is the question; "Should uncontrolled nuclear reactions be used for military applications?".
Science is empirical in its approach. This implies that the questions that are answered by science are questions that are testable and can be be verified in a laboratory.
Science does not answer questions that deal with the opinions of various individuals. That is completely outside the purview of scientific investigation.
Hence, science does not answer the question; Should uncontrolled nuclear reactions be used for military applications?
This question deals with moral values and the opinions of people about a matter and not empiricism.
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Explain how the lithosphere, hydrosphere, and atmosphere individually and collectively affect the biosphere. (2 points)
The lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
What is the lithosphere?The lithosphere is the soil part that composes the Earth's planet (i.e., the soil), the hydrosphere refers to oceans and all water bodies, while the atmosphere is the layer of air. These three layers interact with biotic factors to shape the biosphere.
In conclusion, the lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
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Which of the following measurement
tools would you need to determine the
weight of an iPad?
A. graduated cylinder
B. double pan balance
C. scale
D. triple beam balance
Answer:
It would be C.scale, because
A. is for liquid
B. is for measuring 2 things
and D. is for i don't know(lol)
but i think the scale would be the easiest way to measer an iPad
Rowenda is stopped on the side of the road. She then starts pedaling her bicycle for 15 seconds. Her final
velocity is 9 m/s. What is her acceleration while she is pedaling?
Explanation:
acceleration = change in velocity / change in time
a = v2-v1
- - - - - -
t
V1 = 0 ( since she stopped)
V2 = 9 m/s
t =15s
a = 9 - 0
- - - -
15
= 0.6m/s^2
a 60g tennis ball travelling at 30m/s hi a wall and bounce back at 20m/s.calculate (a)momentum of the ball before impact (b)momentum of the ball after impact
Explanation:
the formula for momentum is denoted by p=mv where p is momentum, m is mass and v is velocity. thus, the velocity before impact would be 0.060 x 30 = 1.8 kg/ms
the second one would just be 0.060 x 20 0.72kg/ms
I'm not 100 percent sure this is correct but yeah
2. Match the following:
Larva 'of butterfly
10
Earthworm
Sole
Annelida
Vacuoles
Protozoa
Caterpillar
Storage tanks
Give birth to young ones
Dog
Paramecium
Answer:
Tricky man
Explanation:
Very tricky
Therefore, they
experience a
and produce
surface tension.
Answer:
Explanation:
Why is evolution called a scientific theory?
PLEASE HELP!!!
I think it’s either c or d
Answer:
There is lots of evidence to support it, is the correct answer
The reason why evolution is regarded as a scientific theory is because there are lots of scientific evidences to support it.
Evolution refers to the scientific thinking that complex life forms came out of simple life forms. The complex sequence of events that occurred during the transformation of simple life forms to complex life forms are described by the theories of evolution.
The reason why evolution is regarded as a scientific theory is because there are lots of scientific evidences to support it.
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This graph shows that as an object's mass increases its
es )
A)
inertia increases.
B)
inertia decreases.
acceleration increases.
D)
acceleration decreases.
Answer:
(A) inertia increases.
Explanation:
Inertia is the property of mass that resists change so the mass an object has the greater the inertia
why is burning a paper a chemical change
when we burn a paper it undergoes the combustion reaction.
State the two laws of electromagnetic induction, and state them.
The working principle of a washing machine is
A) reverse osmosis
B) diffusion
C) centrifugation
D) dialysis
Explanation:
The working principle of a washing machine is centrifugation .
Answer:
The correct option is C) centrifugation
Explanation:
The washing machine consists of a centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis of spin that can be very strong.
Write three or four sentences to describe the process by which the sound of a book dropped on a desk reaches your ear. (3 points)
Which object is not accelerating?
A A baseball player sliding into home base.
B A blue Ford 150 pick-up truck speeding up from 50 mph to 80 mph.
C A ladybug crawling forward at constant rate of 2.5 m/s.
D A student riding on a Ferris wheel at a constant rate of 5.0 m/s.
C. The ladybug's speed and direction are not changing, so she has no acceleration.
In A, B, and D, either speed or direction are changing, and that's acceleration.
An engineer is given the task of comparing the fuel efficiency of four car models. She reports the following findings: Model 1, 14 kilometers per liter. Model 2, 9 miles per liter. Model 3, 56 kilometers per gallon. Model 4, 1600 meters per liter. The data for which two models consistently follow the use of SI units?
A.
Models 1 and 4
B.
Models 1 and 3
C.
Models 2 and 3
D.
Models 3 and 4
Answer:
the ans is:-
Model 4
because it uses meters
The speed of sound through air is approximately 343 m/s. What is the speed in miles per hour
Answer:
At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.
PLEASE MARK ME BRAINLIEST.What is difference between magnetic flux and magnetic flux linkage?
Answer:
Magnetic flux has formular: BA while Magnetic flux linkage has formula: NBA
Explanation:
N is number of turns of a coil
B is magnetic flux density across the coil
A is area of coil
[tex].[/tex]
Yo someone help me on dis jawnt rq plzzz!
Answer:
the answer is 45.6 kg = 45600 g
