Answer:
1 m/s2
Explanation:
The net force on the block is 20 N-10 N in the direction of its acceleration, so by Newton’s law F=Ma
a=10N/10kg
=1 m/s2
(Physical science!!!)
Wetlands have characteristics of both dry land and of bodies of water. How have amphibians adapted to this environment?
A.
They can lay their eggs underwater or on dry land.
B.
Water can pass through their lungs; they have night vision.
C.
Water can pass through the skin; they have lungs.
D.
They retain a set of gills their whole lives.
Amphibians retain a set of gills their whole lives that help them to breathe in the water. So, the correct option is D.
What are Amphibians?Amphibians are defined as the class of cold-blooded vertebrates which is made up of frogs, toads, salamanders, newts, and caecilians. All amphibians that spend part of their lives in water and part of their lives on land.
Amphibians are born with gills, and some outgrow them when they become adults while others retain them for their entire lives.
Thus, the correct option is D.
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Gas stored in a tank at 273 K has a pressure of 388 kPa. The safe limit for the pressure is 825 kPa. At what temperature will the gas reach pressure?
Answer: At 508k temperature the gas will reach the pressure.
Explanation:
[tex]T_{2} =\frac{P_{2} T_{1}}{P_{1}} \\T_{2} =\frac{825kPa * 237K }{388kPa} = 580k[/tex]
Answer: 580k
Explanation: Gradpoint
If a volleyball accelerates towards the ground at 10m/s/s and it takes 1.6 seconds to hit the ground, how tall is the building
Answer:
Distance, S = 12.8m
Explanation:
Given the following data;
Acceleration = 10
Time = 1.6
Initial velocity = 0
To solve for acceleration, we would use the second equation of motion;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Substituting the values into the equation;
[tex] S = 0(1.6) + \frac {1}{2}*10*(1.6)^{2}[/tex]
[tex] S = 5 *2.56[/tex]
Distance, S = 12.8m
Therefore, the height of the building is 12.8 meters.
How do scientists determine the number of neutrons in an isotope of an atom?
They subtract the atomic number from the atomic mass.
They find the number of protons.
They divide the atomic mass by two.
They add the number of electrons and protons.
Answer:
They subtract the atomic number from the atomic mass
Hope this helps
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Acceleration due to gravity (ag) = 9.8 m/s2. An object is dropped from a bridge. How
fast will the object be falling in 6.3 seconds?
Answer:
V = 61.74m/s
Explanation:
Given the following data;
Acceleration due to gravity = 9.8m/s²
Time, t = 6.3 secs
Since it's a free fall, initial velocity = 0
Thus, to find the final velocity, we would use the first equation of motion;
[tex] V = U + at[/tex]
Substituting into the equation, we have;
[tex] V = 0 + 9.8 * 6.3[/tex]
V = 61.74m/s
Therefore, the final velocity is 61.74m/s
What is the sum of all of the forces acting on an object
Answer:
Explanation:
The sum of all the forces acting on an object is the net force or resultant force. If all the forces cancel out, the resultant force is zero, else, the unbalanced force will cause acceleration of the object. Force is a vector and hence has both a direction and magnitude. For example, gravitational force (on earth) acts in downward direction and has a magnitude equal to mass of the object and acceleration due to gravity. Once we know all the forces that are acting on a body, we resolve all of them into components (typically horizontal and vertical) and take summation of forces in each direction. If such forces cancel out (in each direction), the object maintains its state of rest or constant motion. If however, forces do not cancel out, there is a net resultant force on the object that will cause acceleration of the object (as given by Newton's second law of motion).
Hope this helps.
The sum of all of the forces acting on an object is called net force. It is categorized as a vector quantity because it has both direction and magnitude to be considered.
What is Force?Force may be defined as the process of pushing or pulling on an object with mass provoking it to change its velocity. It is an external agent capable of altering a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.
Net force in a case where forces of different magnitude and opposite directions will be the difference between greater and lesser force. The combination of the resultant of all the forces acting on an object is called Net Force, which is basically the sum of all the forces acting on that object.
Therefore, the sum of all of the forces acting on an object is called net force.
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HELP!!!! ILL GIVE BRAINLIEST!!HURRY !!!!
what is 5.6 x 10^15 converted to x10^12
Answer:
5,600
Explanation:
You split x10^15 into x10^12 and x10^3. Our new equation is 5.6x10^3x10^12
We do 5.6x10^3 and we get 5,600. Our new equation is 5,600x10^12. I hope this answered your question.
The average velocity and time of motion for an objects are recorded as
Vavg = +2.0 m/s. Ai= 3.0 s
What is the displacement of the object?
O 0.67 m
O 6m
o 3m
O 1.5 m
Look at SS and answer
A car starts at a position of 4km and moves a final position of 5 km. What is the total distance traveled by the car?
A. 1 km
B.-9 k m
C. 9 km
D. -1 km
Answer:
its c. 9km
Explanation:
Because it you add the 4km+5km that gives you a total of 9km
9. Which of Newton's laws explains why a rocket can be sent into space by aiming a force downward?
Answer:
Newton's third law
Explanation:
the fuel is the action force
and the rocket going up is the reaction force
If the block in the picture has an acceleration of 5 m/s2, what would be the block's mass?
Answer:
0.4 Kg
Explanation:
From the question given above, the following data were obtained from the question:
Acceleration (a) of block = 5 m/s²
Force in the right direction (Fᵣ) = 3 N
Force in the left direction (Fₗ) = 5 N
Mass (m) of block =...?
Next, we shall determine the net force acting on the block. This can be obtained as follow:
Force in the right direction (Fᵣ) = 3 N
Force in the left direction (Fₗ) = 5 N
Net force (Fₙ) =?
Fₙ = Fₗ – Fᵣ
Fₙ = 5 – 3
Fₙ = 2 N
Thus the net force acting on the block is 2 N to the left.
Finally, we shall determine the mass of the block as follow:
Acceleration (a) of block = 5 m/s²
Net force (Fₙ) = 2 N
Mass (m) of block =...?
Net force (Fₙ) = mass (a) × acceleration (a)
Fₙ = m × a
2 = m × 5
Divide both side by 5
m = 2/5
m = 0.4 Kg
Therefore, the mass of the block is 0.4 Kg
A person ran with a speed of 6 m/s onto the skateboard .What is the speed with which he ride on the skate board
Answer:
First, remember the conservation of energy.
We can define the kinetic energy as:
K = (1/2)*m*v^2
where m is the mass, and v is the velocity.
The velocity of the person is 6m/s, and the mass is unknown.
Now, when the person rides the skateboard, this kinetic energy must remain constant, if M is the mass of the skateboard, the speed after the person rides ir will be:
K' = (1/2)*(m + M)*v'^2
Where v' is the new velocity.
In this case, we can suppose that the skateboard has really small mass compared with the person.
M < < m
then:
(m + M) ≈ m
then:
K' = (1/2)*m*v'^2 = K = (1/2)*m*v^2
from that equation, we can conclude that:
v' = v
Then if the velocity before riding the skateboard was 6m/s, then after would be also 6m/s.
an aiplane is traveling at 500 mph for 3.5 hours. how far did the plane travel
Answer:
1750mile
Explanation:
500/h
3.5h=3.5×500=1750
cerebrum what is the meaning
Answer:
Plural cerebrums cerebra The largest part of the vertebrate brain, filling most of the skull and consisting of two cerebral hemispheres divided by a deep groove and joined by the corpus callosum, a transverse band of nerve fibers. The cerebrum processes complex sensory information and controls voluntary muscle activity.
Explanation:
Molten material beneath an erupting volcano. Point A at molten material under ground to the left of the volcano. Point B is at the bottom on the side of the volcano. Use the drop-down menus to answer the questions. Label the type of igneous rock that will form at point A. Label the type of igneous rock that will form at point B.
Answer:
Magma
Lava
:)
Explanation:
i did it and got it right
Will the velocity of the book change as it moves across the surface with NO friction? Explain your answer.
Explanation:
If we push on the book with a force of less than 5 N, the book won't move, because the frictional force will exactly balance the force we apply. If we push with a 1 N force, a 1 N frictional force opposes us.
As mass is constant during free-weight resistance training, a greater impulse will result in a greater velocity.Explanation:
The cheetah is the fastest land animal, able to reach quickly a maximum speed of 31.0 m/s. But it is able to maintain this speed for only about 10.0 s. Suppose that the cheetah stalks a prey that has a maximum speed of 25.0 m/s, but is able to maintain this speed for much longer than 10.0 s. If it is to catch its prey, what is the maximum distance the cheetah can be from the prey when the chase begins?
Answer:
60 m
Explanation:
Given that a cheetah is able to reach quickly a maximum speed of 31.0 m/s. But it is able to maintain this speed for only about 10.0 s.
The distance = speed × time
The distance = 31 × 10
The distance = 310 m
Suppose that the cheetah stalks a prey that has a maximum speed of 25.0 m/s, but is able to maintain this speed for much longer than 10.0 s.
The prey distance = 25 × 10
Distance = 250m
If it is to catch its prey, the maximum distance the cheetah can be from the prey when the chase begins must be:
Maximum distance = 310 - 250
Maximum distance = 60 m
