Answer:
50m; 0m/s.
Explanation:
Given the following data;
Initial velocity = 20m/s
Acceleration, a = - 4m/s²
Time, t = 5secs
To find the displacement, we would use the second equation of motion;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Substituting into the equation, we have;
[tex] S =20*5 + \frac{1}{2}*(-4)*5^{2}[/tex]
[tex] S =100 + (-2)*25[/tex]
[tex] S =100 - 50[/tex]
S = 50m
Next, to find the final velocity, we would use the third equation of motion;
[tex] V^{2} = U^{2} + 2aS [/tex]
Where;
V represents the final velocity measured in meter per seconds. U represents the initial velocity measured in meter per seconds. a represents acceleration measured in meters per seconds square.Substituting into the equation, we have;
[tex] V^{2} = 20^{2} + 2(-4)*50 [/tex]
[tex] V^{2} = 400 - 400[/tex]
[tex] V^{2} = 0[/tex]
V = 0m/s
Therefore, the displacement of the bus is 50m and its final velocity is 0m/s.
Function of nucleus
Answer:
The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division.
Explanation:
pls help me tbis is being timed
Answer:
it would have to be 1000 netons
A net force of 1 newton causes an object to accelerate at a rate of 5.0 meters per second per second. What is the mass of the object?
The mass of the object is equal to 0.2 Kg when it accelerates at 5.0 m/s².
What is acceleration?Acceleration of an object can be defined as the rate at which the object changes its velocity w.r.t. time. The acceleration can be expressed as the second derivative of position w.r.t. time and is a vector parameter.
The force exerted on an object is equal to the multiplication of the mass (m) and acceleration (a) according to Newton's 2nd law of motion.
F = ma
And, a = F/m
The mass and acceleration have an inverse relationship.
Given, the net force acting on an object, F = 1 N
The object is accelerating at a rate, a = 5.0 m/s²
The mass of the object can be determined by using the given information as follows:
m = F/a
m = 1/ 5.0
m = 0.2 Kg
Therefore, the mass of the object is equal to 0.2 Kg.
Learn more about acceleration, here:
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Black widow (m=57000 g) shovels snow, holding the shovel at a 40 degree angle above the ground. If she uses a constant force of 180. N and pushes the snow 5.00 m. How much work does she do on the snow?
Answer:
She does a work of 689.44 J in the snow.
Explanation:
A force is said to do work when it alters the state of motion of a body. The work of the force on that body will be equivalent to the energy needed to move it.
In other words, Work is a form of energy transmission between bodies. In order to carry out work, a force must be exerted on a body and it must move.
The work is equal to the product of the force times the distance and the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:
W= F*d* cos Ф
Work W is measured in joules (J), force is measured in newtons (N), and displacement in meters (m).
In this case:
F= 180 Nd=5 mФ= 40 degreesReplacing:
W= 180 N*5 m* cos 40
Solving:
W= 689.44 J
She does a work of 689.44 J in the snow.
What is the relationship between chromosomes and a body's appearance? (A) Chromosomes make it possible for all bodies to exactly reproduce themselves. (B) Chromosomes contain genes that tell the body how to grow and work. (C) Genes make it possible for chromosomes to grow into many different parts of the body. (D) Genes contain chromosomes that tell the body how to grow and work.
Answer: The correct option is B.
Chromosomes contain genes that tell the body how to grow and work.
Explanation:
This is because chromosomes contain alot of human genes which are found in the nucleus and every humans have 23 pairs of chromosomes. The sets of genes determines some of the body features, characteristics or traits. The genes in the body form the genotype and the genotype is expressed physically which is now the phenotype i.e traits expressed physically in the body which is an indication of body appearance.
which change to a circuit is most likely to increase it electrical power
A: increase it's current and increase it's voltage
B: decrease it's current and increase it's voltage
C: decrease it's current and decrease it's voltage
D: increase it's current and decrease it's voltage
Answer:
A................
Explanation:
Hope this helps you
A. increase it's current and increase it's voltage
Explanation:
Can someone help me with these questions please. I will mark brainliest
Answer:
3: I can´t see the text/image, but it depend on the mass and the force applied to the ball, if both are too high, it will be harder to make a home run. (Second law)
4:It would be easier to make a home run because there is no interruption between the ball and the space the same travels. (Third law)
Explanation:
What is Isaac Newtons third law of motion? Explain?
Answer: His third law states that for every action, or force, in nature there is an equal and opposite reaction.
Explanation: Basically, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Hope it helps!
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
Plz help !!!!!! ................................
Answer:
I think the answer is B. Can I have brainlest if I am right, please?
Explanation:
Answer:
it is B because period =1/ frequency and B has lower period
The power in an electrical circuit is given by the equation P= RR, where /is
the current flowing through the circuit and Ris the resistance of the circuit.
What is the power in a circuit that has a current of 0.02 amps and a
resistance of 30 ohms?
Equation of power in a electrical circuit is given as:
[tex] \bf P = I^2R[/tex]
I → Current flowing through the circuit.
R → Resistance of the circuit
We need to calculate power when;
Current (I) = 0.02 A
Resistance (R) = 30 Ω
By substituting values in the equation, we get:
[tex] \rm \longrightarrow P = (0.02)^2 \times 30 \\ \\ \rm \longrightarrow P = 0.0004 \times 30 \\ \\ \rm \longrightarrow P = 0.012 \: W[/tex]
[tex] \therefore [/tex] Power in the circuit = 0.012 W
what are factors that may affect the potential energy? (help)
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Explanation:
hope this helps
The factors affecting potential energy of a body are mass, acceleration due to gravity, and height above the ground.
What is potential energy?Potential energy is the energy that a body possess as a resulting its state or position relative to the ground.
Mathematically;
Potential energy = mass × acceleration due to gravity × heightTherefore, the factors affecting potential energy of a body are mass, acceleration due to gravity, and height above the ground.
Learn more about potential energy at: https://brainly.com/question/14427111
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Please solve C and F ASAP!!! I will give the first person to answer brainiest!!
(c) The potential energy at A is the same as the kinetic energy at B. So
m g h = 1/2 m v²
where m is the mass of the object at the end of the pendulum, g is the magnitude of the acceleration due to gravity, h is the height of the object at point A relative to B, and v is the object's maximum speed. So
(3.8 kg) (9.80 m/s²) h = 140 J
h = (140 J) / ((3.8 kg) (9.80 m/s²))
h ≈ 3.8 m
(f) You know the kinetic energy at B, so just solve for v :
140 J = 1/2 (3.8 kg) v²
v² = (280 J) / (3.8 kg)
v² ≈ 73.684 m²/s²
v ≈ 8.6 m/s
After our sun leaves the main sequence it will most likely...
A.) become a supergiant and explode in a supernova explosion
B.) become a giant and eventually form a black hole
C.) become a supergiant and eventually form a dwarf star
D.) become a giant and eventually form a dwarf star
Answer:
c
Explanation:
A metal ball has a mass of 2.05 kg and a volume of 6.8 cm. What is its density? Remember
Answer:
the density is 0.301 :)
A truck moving due south takes a turn and starts moving towards east while maintaining the same speed.
Its velocity remains constant.
It covers unequal distances in equal intervals of time.
Its velocity changes
None of the above
Answer:
Its velocity changes
Explanation:
When the truck changes direction, its velocity changes.
Velocity is a vector quantity that specifies the magnitude of motion and direction it is taking.
When direction changes, the velocity of a body will also change. This is unlike speed which is a scalar quantity.
Velocity is the displacement divided by time taken.
2
7.42 X 10
What is the scientific notation for this equation
Answer:
7 42 x 10^1
Explanation:
Because 10 x 1 =10
Question 7 of 20
Which sample of water has the most thermal energy?
A. A 1.5 kg sample at 10°C
O B. A 0.5 kg sample at 1°C
O C. A 1 kg sample at 10°C
O D. A 1 kg sample at 4°C
Answer:
4
Explanation:
because she is thermal energy
Answer: A 1.5 kg sample at 10 degrees c
Explanation:
A PEX
what is vector quantity
Answer:
The quantity which have both magnitude and direction is called vector quantity
A physical Quantity, which has magnitude, direction and units But must follow the traingle law of vector addition
Example:- Force, velocity acceleration displacement etc.
Momentum is a product of mass and _____.
Answer:
Momentum, product of the mass of a particle and its velocity. ... Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.
Select all that are correct.
3. According to Newtons 1st law, which of the following would be true?
f. An object at rest will stay at rest.
g. An object in motion will stay in motion.
h. An object in motion or at rest will have a net force of zero.
i. Acceleration will be zero for object showing Newton’s 1st law.
j. Acceleration goes in the opposite direction of the net force.
4. Inertia is
a. A body's resistance to motion change.
B. The same as weight
C. The same as mass.
D. Is associated with the first law of motion
5. Newton's 2nd law must use (F= ma)
a. The friction force
b. The net force
C. The applied force
d. The normal force.
Answer:
f and g are correct
Explanation:
Answer:
3) F
4) A
5) D
Explanation:
huhu basta yan lang alamko!
A wave vibrates up and down 22 cycles in 7 seconds with a wave speed of 57. Calculate the
wavelength. (Round to the 2nd number after the decimal)
Answer:
18.14m
Explanation:
Given parameters:
Frequency = [tex]\frac{22}{7}[/tex]cycles/s
Speed of wave = 57m/s
Unknown:
Wavelength = ?
Solution:
The speed of a wave is related to frequency and wavelength using the expression below;
V = f x λ
V is the speed of the wave
f is the frequency
λ is the wavelength
Insert the parameters and find λ;
57 = [tex]\frac{22}{7}[/tex] x λ
λ = 57 x [tex]\frac{7}{22}[/tex] = 18.14m
Compare and contrast what happens to an object's motion when balanced or
unbalanced forces act on that object.
Answer: The motions shifts.
A circus performer swings down from a platform on a rope tied to the top of a tent in a pendulum-like swing. The performer's feet tough the ground 9 meters below where the rope is tied. how fast is the performer moving at the bottom of the arc?
First solve for time to fall using: = √2 ∶ 2(9) = 1.35. Then solve for velocity √9.8
2
2
using: = ∶ 9.8 2 ∗ 1.35 =13.23 m/s The performer’s velocity is 13.2 m/s
at the bottom of the swing.
Explanation:
Which of the following is a muscle on the front side of the upper body?
Answer:
What are the following?
Explanation:
• Which is the following statements describes the interaction between magnetic poles?
Answer:
Please state the statements in the comment so I can help
Which of the following games below involves different manipulative skills like throwing and rolling and some motor skills?
Group of answer choices
target games
invasion games
striking and fielding games
physical activity
Answer:
striking and fielding
Explanation:
striking and fielding
Give me some pointers please, I need to finish this ASAP-
particle moving with constant acceleration changes its velocity from 10 m/s to
20m/s while covering a distance of 130m. Find the acceleration of the particle.
Click on photo to view full solution
When a 3.0 kg mass is hung from a vertical massless spring, the spring is stretched 40 cm. What is the spring constant of the spring?
Answer:
0.74 N/cm
Explanation:
The following data were obtained from the question:
Mass (m) = 3 Kg
Extention (e) = 40 cm
Spring constant (K) =?
Next, we shall determine the force exerted on the spring.
This can be obtained as follow:
Mass (m) = 3 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Force (F) =?
F = mg
F = 3 × 9.8
F = 29.4 N
Finally, we shall determine the spring constant of the spring. This can be obtained as follow:
Extention (e) = 40 cm
Force (F) = 29.4 N
Spring constant (K) =?
F = Ke
29.4 = K × 40
Divide both side by 40
K = 29.4 / 40
K = 0.74 N/cm
Therefore, the spring constant of the spring is 0.74 N/cm
What changes when unbalanced forces are
applied to a moving bike along the direction
it is moving?
