Answer:
A
Explanation:
I took the test on progress learning and got it right.
If we increase the velocity of an object by 1 meter per second, as a result the kinetic energy of the object will increase as velocity is directly proportional to the kinetic energy.
What is Kinetic energy?
The kinetic energy of an object is the energy which the object possesses due to its motion. Kinetic energy is defined as the work which is required be done to accelerate an object of a given mass from the state of rest to its stated velocity.
Kinetic energy is the energy possessed by an object due to its motion. Potential energy is the form of energy which is possessed by an object due to the position or state. Kinetic energy is directly proportional to the mass and velocity of the object. Therefore, if we increase the velocity of an object, then kinetic energy of the object will increase.
Learn more about Kinetic energy here:
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A car engine produces a force of 2000N while moving a distance of 200m in a time of 10s. What is the power developed by the engine
1. An elephant has a mass of 5,500 kg. What is the elephant's weight?
Write equation here:
Answer:
12125.42 Lbs.
Explanation:
The weight of the elephant is 53,900 N
The given parameters;
mass of the elephant = 5,500 kg
The weight of the elephant is calculated as;
Weight = mg
where;
m is the mass of the elephant
g is acceleration due to gravity = 9.8 m/s²
The weight of the elephant is calculated by substituting the given parameters;
Weight = 5,500 x 9.8 = 53,900 N
Thus, the weight of the elephant is 53,900 N
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The principal ran a marathon, 26.2 miles in 3 hours. This is an example of.....
A-speed
B-velocity
C-acceleration
________ 8. The pH of a solution is a measure of the concentration of H+ ions in it. TRUE OR FALSE
Answer:
False.
Explanation:
Potential of Hydrogen is the full form of PH.
Potential of Hydrogen tells about the acidity or basicity of the solution.
The pH of a solution is a measure of the concentration of hydrogen ions [tex](H+)[/tex] ions and hydroxide ions [tex](OH-)[/tex] in a solution.
So, the given statement is false.
You can take your heart rate for 6 seconds and multiply by 10 to get the 60 second count quickly during
True
False
Answer:
true
Explanation:
Two cars start moving from the same point on a rectilinear path at the same time, heading to the same destination 90 km away. The first travels at an average speed of 50 km/h and the second at 60 km/h. Deter- mine the time interval separating the arrival of the two cars to their destination.
Answer:
0.3 hour
Explanation:
From the question given above, the following data were obtained:
Distance travelled = 90 km
Speed of 1st car = 50 km/h
Speed of 2nd car = 60 km/h
Time interval separating the two cars =?
Next, we shall determine the time taken for each car to get to the destination. This can be obtained as follow:
For the 1st car:
Distance travelled (d) = 90 km
Speed of 1st car (S₁) = 50 km/h
Time (t₁) =?
Speed = Distance /time
S₁ = d/t₁
50 = 90 / t₁
Cross multiply
50 × t₁ = 90
Divide both side by 50
t₁ = 90 / 50
t₁ = 1.8 hours
For the 2nd car:
Distance travelled (d) = 90 km
Speed of 2nd car (S₂) = 60 km/h
Time (t₂) =?
Speed = Distance /time
S₂ = d/t₂
60 = 90 / t₂
Cross multiply
60 × t₂ = 90
Divide both side by 60
t₂ = 90 / 60
t₂ = 1.5 hours
Finally, we shall determine the time interval separating the arrival of the two cars. This can be obtained as follow:
Time for the 1st car (t₁) = 1.8 hours
Time for the 2nd (t₂) = 1.5 hours
Time interval separating the two cars (tₛ) =?
tₛ = t₁ – t₂
tₛ = 1.8 – 1.5
tₛ = 0.3 h
Thus, the interval separating the arrival of the two cars is 0.3 hour
How many different atoms are there in a compound?
Answer:
2 or more atoms
Explanation:
yes yes yes yes yes yes yes yes
Answer:
Two or more
Explanation:
It's mostly two but unique structures might compose of more than 2
a body is thrown at an angle 30°to the horizontal with kinetic energy 40J.atbthe highest point of its motion the kinetic energy will be?
Transforme: a) 2 km em m b) 1,5 m em mm c) 5,8 km em cm d) 0,4 m em mm e) 27 mm em cm f) 126 mm em m g) 12 m em km
Answer:
a) 2000 m
b) 1500 mm
c) 580000 cm
d) 400 mm
e) 2.7 cm
f ) 0.126 m
g) 0.012 km
Explanation:
Transform
a) 2km to m
1 km = 1000m
hence : 2 km = 2 * 1000 = 2000 m
b) 1.5m to mm
1 m = 1000 mm
hence: 1.5 m = 1.5 * 1000 = 1500 mm
C) 5.8 km to cm
1 km = 100000 cm
hence ;5.8 km = 5.8 * 100000 = 580000 cm
D) 0.4 m to mm
1 m = 1000 mm
hence; 0.4 m = 0.4 * 1000 = 400 mm
E) 27 mm to cm
1 mm = 0.1 cm
hence ; 27 mm = 27 * 0.1 = 2.7 cm
F) 126mm to m
1 mm = 0.001 m
hence ; 126 mm = 126 * 0.001 = 0.126 m
G) 12m to Km
1 m = 0.001 km
hence ; 12 m = 12 * 0.001 = 0.012 km
How much work is performed when a 50 kg crate is pushed 15 m with a force of 20 N?
Answer:
300 jules
Explanation:
What is the intensity of the electric current in one coil, if the number of the coils is 10, length of the coil is 5m, and magnetic induction is 8T?
Answer:
I think the answer is D...
Explanation:
uses of convace, convex mirror
Answer:
The concave mirror is a converging mirror so that it is used for many purposes, It is used as a torch to reflect the light, It is used in the aircraft landing at the airports to guide the aeroplanes, It is used in shaving to get an enlarged and erect image of the face.
Explanation:
10 points whats an average height for a egg drop? 20m or what?
Answer:
Egg Drop Challenge height
The containers will be dropped from an initial height of about 11.5 ft. The second and final drop will be from the second floor (about 19.5 ft).
Explanation:
What’s I called when a HORIZONTAL VELOCITY DIVIDED BY VELOCITY.
Is this spring or winter?
Please answer fast!!!
which of the following is an example of unbalanced force?
1. A chair leaning on a wall
2. A stroller being pushed
3. A ball on the grass
4. A book sitting on a table
Answer:1. A chair leaning on a wall
Explanation:
How long will it take a bear to run 45 meters if it is traveling at 10m/s
3. Bart ran 5000 meters from the cops and an average speed of 10 meters/second before he got
caught. How long did he run?
Answer:
8 minutes and 20 seconds
Explanation:
5000/10 to get the number of seconds, which is 500, then you convert 500 seconds to minutes and you get 8 minutes and 20 seconds
Kerry drops her iPhone accidently as she is standing on an overview. How fast is the iPhone moving after 3s?
Answer:
really fast? xP
Explanation:
A body is at equilibrium under the action of three forces. One force is 10N acting due east and one is 5N in the direction 60° north east. What is the magnitude and direction of the third force?
Answer:
If the body is in equilibrium the two forces add up and the third is the opposite of the resultant.
F(1x)=F(1)=10 N
F(2x)=F(2)cos60=5•0.5=2.5 N
F(2y) =F(2)sin60 = 5•0.866= 4.33 N
F(3x) =- F(x)=- (10+2.5 )= -12.5 N
F(3y) =- F(2y)= - 4.33 N
F(3) = sqrt{ F(3x)²+F(3y)²} =13.23 N
tan φ = F(3y)/F(3x) =4.33/12.5=0.364
φ = 19.1⁰ (south-west)
Explanation:
Under constant acceleration, the average velocity of a particle is half the sum of its initial and final
velocities. Is this still true if the acceleration is not constant? Explain.
Answer:
It is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle is not constant
Explanation:
The motion of a particle under constant acceleration, 'a', is be given by the following kinematic equations;
v² = u² + 2·a·s
v = u + a·t
Where;
v = The final velocity of the particle
u = The initial velocity of the particle
a = The acceleration of the particle
s = The distance through which the particle travels
t = The time of motion of the particle
By simplifying the above equation, we have;
v² - u² = 2·a·s
(v² - u²)/(2·a) = s
(v - u) × (v + u)/(2 × a) = s
((v - u)/a) × ((v + u)/2) = s
From v = u + a·t, we have;
t = (v - u)/a
∴ ((v - u)/a) × ((v + u)/2) = t × ((v + u)/2) = s
∴ ((v + u)/2) = s/t
The average velocity = (Total distance traveled by the particle) ÷ (The time of travel of the particle)
∴ The average velocity = s/t = ((v + u)/2) = Half the sum of the initial and final velocity
However, it is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle, 'a', is not constant, as the velocity time graph is no longer a straight line graph and the distance traveled by the particle, 's', which is the area under the velocity time graph, 'A', (given by the sum of area of the triangle and the rectangle given by the area under straight line graph for constant velocity) cannot be given directly by the product of the time and the average velocity.
What could you use to split white light into the colors of the rainbow?
A. A flashlight
B. A capacitor
C. A light bulb
D. A prism
Answer:
D
Explanation:
Answer:
prism
Explanation:
You apply a force of 68N to lift a box 4m off the ground in 2s. What was your power?
Answer:
136........
.............
A 2750 kg helicopter flies horizontally at constant speed. Air resistance creates a 7510 n backward force. What is the magnitude of the lift force created by the propellers
Answer:
Explanation:
Let lift force F be created by propellers at angle of Ф with the horizontal .
The vertical component of this force will balance the weight of helicopter and horizontal component will balance the air resistance .
F sinФ = mg = 2750 x 9.8 = 26950 N
F cosФ = 7510 N
Squaring and adding ,
F² = 26950² + 7510²
= 726302500 + 56400100
= 782702600
F = 27976.82 N .
Which of the following is an example of an opposing force?
A.Gravity pulling a ball down a hill
B.Wind blowing a leaf off of a tree
C.Gravity holding a rock still on the ground
D.Water pushing against someone as they wade through a pool
A wave has a wavelength of 0.02m and period of 8.0*10^-2 seconds. calculate it's speed. (showing working)
Answer:
[tex]v = 0.25m/s[/tex]
Explanation:
Given
[tex]\lambda = 0.02m[/tex] --- Wavelength
[tex]T = 8.0 * 10^{-2}s[/tex] --- Period
Required
Determine the velocity of the wave
This is calculated using:
[tex]v = \frac{\lambda}{T}[/tex]
[tex]v = \frac{0.02m}{8.0*10^{-2}s}[/tex]
[tex]v = \frac{0.02m}{8.0*0.01s}[/tex]
[tex]v = \frac{0.02m}{0.08s}[/tex]
[tex]v = 0.25m/s[/tex]
Hence, the velocity is 0.25m/s
Can someone please help me?
Please also explain how you got the net force, thank you.
The questions are in the picture i attached below.
Answer:
unbalanced 1st answer
right 2nd answerAnswer:
hi, your answers are correct
Explanation:
Which is a benefit of strength training? O Decreased blood flow to muscles O Improved oxygen delivery Flexibility of tendons and joints O Increased lean muscle tissue
Answer:
Increased lean muscle tissue.
Explanation:
I hope this helps :) Tell me if I am wrong!
Answer:
Increased lean muscle tissue.
Explanation:
i took the test!
Whose atomic theory was the first to introduce the idea that all things are made from indivisible spheres called atoms and used evidence and research to back his findings? *
Answer:
Dalton's atomic theory
Explanation:
Dalton's atomic theory was the first to introduce the idea that all things are made from indivisible spheres called atoms and used evidence and research to back his findings. This theory was based on the law of constant composition and the law of conservation of mass. Also, this theory explains the matter in terms properties of atoms.
pls pls help me out AHH, what is not true about MEIOSIS?
A. The chromosomes in the daughter cells half the number from the parent cell.
B. The chromosomes in the daughter cells are the same number as the parents cell.
C. The only cells that will undergo meiosis will become sperm or egg cells used for reproduction.
D. The shuffling of genes happens in meiosis.
Answer:
B.
Explanation:
This is not true as the number of chromosomes in the daughter cells are half the number in the parent's cells