Answer:
Vf = 28 m/s
Explanation:
In order to find the final velocity of the rock, we will use the 3rd equation of motion. The third equation of motion for vertical direction is written as follows:
2gh = Vf² - Vi²
where,
g = acceleration due to gravity = 9.8 m/s²
h = height dropped = 40 m
Vf = final velocity of the rock = ?
Vi = Initial Velocity of the rock = 0 m/s (since, rock was initially at rest)
Therefore,
(2)(9.8 m/s²)(40 m) = Vf² - (0 m/s)²
Vf = √(784 m²/s²)
Vf = 28 m/s
Heart rate refers to the number of times your heart beats in one minute
True
False
Answer:
true
Explanation:
Answer:
true
Explanation:
I WILL MARK BRAINLIEST PLS HELP!!!!!
Which of these is an accurate statement about the strength of the force of gravity?
(1 Point)
It is strong distance force.
It is the strongest known force in the universe.
It does not exist in outer space.
It is relatively weak distance force.
i was wrong sorry
Explanation:
Answer:
it is relatively weak distance Force
ordered from strongest to weakest the forces are 1) the strong nuclear force, 2) the electromagnetic force, 3) the weak nuclear force, and 4) gravity
Hydrogen bonds are weaker than the bond that holds hydrogen to oxygen in a
water molecule.
A. True
B. False
Answer:
Your answer is false
Explanation:
ASAP
In an experiment, students were given an unknown mineral. The unknown mineral was placed in 150 ml of water. Once in the water, the volume went up to 165 ml. Then when the same object was dried, then massed on a balance. It had a mass of 225 grams. What is the density of the unknown mineral? Note: You only have to fill in the numerical answer.
Answer:
15
Explanation:
225/(165-150)=15g/cm3
How do you calculate relative velocity?
Answer:
Vab=Va-VbVab=Vb-VaExplanation:Vab is velocity of a relative to b
Vba is velocity of b relative to a
Why learning SI base unit are important to understanding the sizes of a different object?
Explain how a car moving around a traffic island at a steady speed of 20 mph is constantly accelerating.
One difference in the formation of the small solid planets and the larger gaseous planets is that the gaseous planets formed
A) much closer to the Sun.
B) beyond the frost line in the nebula.
C) from condensed metals in the outer nebula.
D) as a result of icy individual nebula in space.
B) beyond the frost line in the nebula.
A scientific theory is a hypothesis supported by many experiments
True or False
Answer:
I believe it is True... I hope it is correct :)
Explanation:
Answer : False
Explanation :
As a United States citizen, the requirement to serve on juries if called upon is considered which of the following?
Answer:
if u are caught by the jews u die
Explanation:
Answer: An obligation
Explanation: Because I got it right on Prepworks!
Anyone get this if you do please help me step by step
Answer:
$7.95
Explanation:
$5.75 cost per bag ÷ 47 apples = unit cost of $0.1223. thus, each apple cost $ .1223.
.1223 × 65 apples= $7.95
note_rounding apples to .12*65=$7.8
What is the chemical symbol for C6H12O6
How can you use a Position vs. Time graph to describe an object’s speed or direction of motion
Answer:
In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing.
Explanation:
hop it helps
What is the magnitude of the total displacement of the school bus from the start to the end of its trip?
Answer:
With the given information, we can assume that the start and the end of the trip are the same place. (Suppose, a tour where the bus starts at the school, then it goes to a given location, and then it returns to the school)
Now, the definition of displacement is:
The difference between the final position and the initial position.
But if the start and the end of the trip are the same place, then the initial and final position must be the same. Then the difference between the final position and the initial position is zero.
This means that the displacement of the school bus from the start to the end of its trip must be zero.
Jenny has 456 grains of rice. how many grains of rice are left after 234 grains are eaten?
Answer:
222 grains are left....lol such simple question
How many significant figures are in 0.0069
Answer:
2
Explanation:
if the speed is 343 m/s and the wavelength is 10m than what is the frequency?
What is happening to the heat in freezing?
Answer:
Heat is released.
Explanation:
Freezing is almost always an exothermic process, meaning that as liquid changes into solid, heat and pressure are released. This is often seen as counter-intuitive, since the temperature of the material does not rise during freezing, except if the liquid were supercooled.
Can somebody google or use the info on the page to answer question 2 correctly!!! Plz thanks!
(WILL MARK AS BRAINLIEST)
:D
Answer:
Yes, Most living thing need oxegen, plants need light to grow(food).
plants and animals need water. temputre is important too, most living things need a tempure range. therefor, all(most) living things need these 5 thing to live.
just rewrite this in your own word
Hope this helped you
Red.
Three students are fighting over a T-shirt. Student 1 exerts a constant force F⃗ 1=F0i^ on the shirt, student 2 exerts a constant force F⃗ 2=−3F0j^ and student 3 exerts a constant force F⃗ 3=−4F0i^+Gj^. (In these expressions F0 and G are positive constants with units of force.) As the three students exert these forces, the T-shirt undergoes a straight-line displacemen 2di^+dj^ where d is a positive constant with units of distance. Find the work done on the T-shirt by student 1.
Answer:
W₁ = 2F₀d
Explanation:
When a force is applied on a body, due to which the body displaced by some distance, then the work is said to be done. Hence, the work is the dot product of the force nd displacement.
W = F.d
where,
W = Work Done
F = Force Applied
d = Displacement
For student 1:
W = W₁ = ?
F = F₁ = F₀ i
d = 2d i + d j
Therefore,
W₁ = (F₀i).(2di + dj)
W₁ = 2F₀d(i.i) + F₀d(i.j)
W₁ = 2F₀d(1) + F₀d(0)
W₁ = 2F₀d + 0
W₁ = 2F₀d
Use Hooke's Law and Newton's 2nd Law to derive a formula for the acceleration of an object of mass m on a frictionless surface which is attached to a spring with a constant k which is stretched a distance L. The acceleration should be in terms of m, k, and L.
Answer:
a = kL/m
Explanation:
Here we can use Hooke's Law to find out the force applied on the system. Hooke's Law states that when a spring is stretched by some force, the force applied is directly proportional to the displacement of spring. The formula is given as:
F = kL
Now, the Newton's Second Law of motion states that whenever an unbalanced force is applied to a body it produces an acceleration in the body, in its own direction. So, the force is given by the formula:
F = ma
Comparing both the forces, we get:
kL = ma
a = kL/m
During what major athletic competition did the Munich Massacre occur?
Answer:
The answer is A
Explanation:
Answer:
A. Summer Olympics
Explanation:
which sentence describe newton's third law?
A. the acceleration of an object is equal to the net of force divided by the mass of an object
B. for an object to slow down or speed up the forces acting on it must be unbalanced
C. forces always comes in pairs that act in opposite directions
D. an object that is moving at a constant speed and in a straight line is experiencing balanced forces
Answer:
C. Forces always comes in pairs that act in opposite directions
Explanation:
I got it right when I chose it.
Answer:
c
Explanation:
it's correct trust me
what is the volume of a bar of soap that is 9 cm long, 5 cm wide, and 2 cm high?
Answer:
90cm
Explanation:
2x5=10
10x9=90
Answer:
90 cm
Explanation:
To find volume, the formula is V=LWH
L is the length, W is the width and H is the height:
9 x 5 x 2 = 90
So V = 90 cm
Hope this helps you out! : )
define polarization (igcse answer please)
Answer:
the action of polarizing or state of being or becoming polarized: such as the action or process of affecting radiation and especially light so that the vibrations of the wave assume a definite form. Polarization, in Physics, is defined as a phenomenon caused due to the wave nature of electromagnetic radiation. There are two types of waves, transverse waves, and longitudinal waves.
plz mark brainliest
A ball moving horizontally across my desk rolls off at a velocity of 3.3 m/s. Assuming my desk is a height of 0.81 m, how long will the ball be in the air?
Answer in units of seconds. Assume acceleration due to gravity is -9.81 m/s^2
Answer:
girl what- I can't answer this but I need points so I'ma just put this random lol sorry tho . ask the tutor
Pls Answer I’m Being Timed!!
Substance Specific Heat (1 kg ? K')
Aluminum
900
Copper
390
Brass
380
Silver
230
Platinum
130
of the five metal samples, with equal masses, which would be the best material to use if you needed something to heat up quickly?
A aluminum
B. platinum
C. copper
D. gold
Answer:
Platinum
Explanation:
The specific heat of a substance gives the amount of energy it takes to raise the temperature.
what is the difference between distance and displacement? give an example of each.
Answer: Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Explanation: hope it helps :)
A wave traveling at 50.0 m/s has a wavelength of 10.0 m. What is the frequency of the wave? Show your work below?
Answer:
The frequency of the wave is 5 Hz
Explanation:
Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).
Frequency is the number of vibrations that occur in a unit of time. Its unit is s – 1 or hertz (Hz).
The propagation velocity is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement. Relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation: v = f * λ.
In this case:
v= 50 [tex]\frac{m}{s}[/tex]f=?λ= 10 mReplacing:
50 [tex]\frac{m}{s}[/tex] = f* 10 m
Solving:
[tex]f=\frac{50 \frac{m}{s} }{10 m}[/tex]
f=5 Hz
The frequency of the wave is 5 Hz
how does speed affect the amount of kinetic energy an object has?
Answer:
The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has
Hope this helps! Please mark Brainliest!