Answer:
10
Explanation:
U=0
V=?
a=2
times=5
a=(v-u)÷t
2=(x-0)÷5
10=x-0
10ms^-1=x
Answer:
10 m/s
Explanation:
Multiply 2 m/s by 5.
1 second: 2 m/s
2 seconds: 4 m/s
3 seconds: 6 m/s
4 seconds: 8 m/s
5 seconds: 10 m/s
This can also be solved by y=mx+b, where y is speed, m is the m/s, so 2, x is time, we want to find what y equals when x=5, and b is starting speed, which is 0 m/s, since the runner is starting from a rest.
In short, this is:
x=5
y=2x
y=2(5)
y=10
An object is moving to the left. In which direction would a force need to be exerted to make this object stop?
Answer: going right cause both will pull at each other and slow it down
Explanation:
Dump Tower is 96 stories tall. A small, 0.6-kg object is dropped over the side of the roof of the tower and accelerates toward the ground. Track the object for its entire fall. Each story of this tower is 3.01 meters tall.
What is the accelertion due to gravity of the planet and what is the impact speed of the object you dropped? Note: Time of fall is 12.60s
Answer:
Explanation:
height of one floor = 3.01 m
height of 96 floor h = 96 x 3.01 = 288.96 m
time of fall t = 12.6 s
h = 1/2 g x t²
288.96 = 1/2 x g x 12.6²
g = 3.64 m /s²
v = u + gt
v = 0 + 3.64 x 12 .6
= 45.86 m /s
velocity of impact = 45.86 m /s .
a sample o aluminum is put in 10.5 mL of water. if the water rises to 13.5 mL when the aluminum is added, what is the density of the aluminum if it has a mass of 8.1 g
Answer:
The answer is 2.7 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
volume = final volume of water - initial volume of water
volume = 13.5 - 10.5 = 3 mL
From the question we have
[tex]density = \frac{8.1}{3} \\ [/tex]
We have the final answer as
2.7 g/mLHope this helps you
- A 300 kg box of supplies is dropped from a plane and has a parachute attached, if it accelerates down
at 2m/s? what resistive force does the parachute supply?
Answer:
2340 N
Explanation:
There are two forces on the box. Weight force pulling down and resistive force pushing up.
Sum of forces in the y direction:
∑F = ma
F − mg = ma
F = mg + ma
F = m (g + a)
F = (300 kg) (9.8 m/s² + (-2 m/s²))
F = 2340 N
STATION 1 - Shake a large mass vertically and horizontally and describe the difference. What if you were on the space station?
Answer:vertical is harder
Explanation:
Because of gravity
What is the difference between EMS waves and mechanical waves? Select all that apply. * Mechanical wave require a medium to travel on. EMS waves do NOT require a medium to travel on. EMS waves do NOT require a medium to travel on but, they can use a medium to travel on.
Answer:
EMS waves require no material medium to travel
Explanation:
Here, we want to consider the difference between mechanical waves and EMS waves
When we talk of EMS waves, we mean electromagnetic radiation waves .
Example of EMS waves include radio waves , x-rays etc
These kind of waves require no material medium to travel and this is the main difference they have with mechanical waves
What unit is used when calculating acceleration?
Discuss the significance of the Tropic of Cancer, the Equator, and the
Tropic of Capricorn as they relate to the seasons.
Answer:
im a capricorn may i?
Explanation:
4. The loudness of the sound depends on the energy. More energy gives a louder sound. We call the loudness ______________, which is measured in _______________.
Explanation:
I know the second blank is decibels.
Answer:
the loudness of sound is called the sound wave or the volume..and it is measured in devibels(dB)
A box of mass m is at rest on a horizontal surface. Aconstant force of magnitude FA is applied and
the box moves in the direction shown in the diagram below. There is friction between the box and
the horizontal surface, but the frictional force, Fr, is smaller in magnitude than FA-
Mark me brainliest:)
Science is the study of the natural world through blank and blank
Answer:
biology. hope this helps
A student kicks a football vertically upwards, causing the football to reach a maximum height of 40.0m before falling back to the ground. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the football.
A) With what speed was the football kicked?
B) What was the football's total flight time?
Answer:
A. 28 m/s
B. 5.72 s
Explanation:
The following data were obtained from the question:
Maximum height (h) = 40 m
Acceleration due to gravity (g) = 9.8 m/s²
A. Determination of the initial velocity.
Maximum height (h) = 40 m
Acceleration due to gravity (g) = 9.8 m/s²
Velocity at maximum height (v) = 0 m/s
Initial velocity (u) =.?
v² = u² – 2gh (Ball is going against gravity)
0² = u² – (2 × 9.8 × 40)
0 = u² – 784
Collect like terms
0 + 784 = u²
784 = u²
Take the square root of both side
u = √784
u = 28 m/s
Thus, the ball was kicked with a velocity of 28 m/s
B. Determination of the time of flight.
We'll begin by calculating the time taken to reach the maximum height. This can be obtained as follow:
Velocity at maximum height (v) = 0 m/s
Initial velocity (u) = 28 m/s
Time taken to reach the maximum height (t) =?
v = u – gt (Ball is going against gravity)
0 = 28 – 9.8t
Rearrange
0 + 9.8t = 28
9.8t = 28
Divide both side by 9.8
t = 28/9.8
t = 2.86 s
Finally, we shall determine the the time of flight as follow:
Time taken to reach the maximum height (t) = 2.86 s
Time of flight (T) =?
T = 2t
T = 2 × 2.86
T = 5.72 s
Therefore, the time of flight for the ball is 5.72 s
::
A rope has a density and thickness such that a 3.25-centimeter-long segment of it weighs 61.40 grams. There are 28.3495
grams in an ounce and 2.54 centimeters in an inch. How many ounces would a 19.45 inch length of the same rope weigh?
5.10 oz
b. 11.49 OZ
32.92 oz
53.90 OZ
a
C.
d.
Please select the best answer from the choices provided
ООО
с
D
Mark this and retum
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Answer:
A 19.45-inch-long segment of the same rope would weigh 32.92 ounces.
Explanation:
You know that:
3.25 cm length of rope weighs 61.40 grams .There are 28.3495 grams in an ounce .There are 2.54 centimeters in an inch.The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), knowing the values a, b and c and x being the unknown, we must apply the direct rule of three as follows:
a ⇒ b
c ⇒ x
So [tex]x=\frac{c*b}{a}[/tex]
To find the number of ounces a 19.45-inch length of the same string would weigh, you apply the following rules of three:
If there are 2.54 centimeters in 1 inch, how many centimeters are there in 19.45 inch?[tex]centimeters=\frac{19.45 inch*2.54 centimeters}{1 inch}[/tex]
centimeters=49.403
Now, if 3.25 centimeters long it weighs 61.40 grams, then 49.403 centimeters long, how many grams does it weigh?[tex]grams=\frac{49.403 centimeters*61.40 grams}{3.25 centimeters}[/tex]
grams= 933.34
Finally, if there are 28.3495 grams in 1 ounce, in 933.34 grams how many ounces are there?[tex]ounces=\frac{933.34 grams*1ounce}{28.3495 grams}[/tex]
ounces= 32.92
A 19.45-inch-long segment of the same rope would weigh 32.92 ounces.
Answer:
c
Explanation:
Newton's First Law of
Motion
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force
Answer:
An object in motion will stay in motion unless acted on by an unbalanced force.
An object at rest will stay at rest unless acted on by an unbalanced force.
An object in motion will stay in motion, and an object at rest will stay at rest unless acted on by an unbalanced force
(There are three parts to Newton’s First Law of Motion)
430 N is applied to a 250 kg object. What is the acceleration?
Answer:
a= 1.72 m/sec/sec
Explanation:
F=ma , here force is given as 430N and mass as 250 kg so using the formula acceleration can be calculated as follows
∴F=ma
1 N= 1 kg m[tex]s^{-2}[/tex]
[tex]a=\frac{F}{m}[/tex]
[tex]a=\frac{430 kg m/sec/sec}{250 kg}[/tex]
a= 1.72 [tex]ms^{-2}[/tex]
we know we have exerted a force even when we have no work done
Tell me a model that scientist have revised? Explain how it was changed.
A 0.84-kg block sits on a lab table. The block accelerates to the right at a rate of 1.96 m/s/s There is a backwards force of 0.87 N. What is the force pulling the block forward?
Answer:
kkolkkkkkkkkkkkkkkkkkkissxfd
What do digital signals turn sounds into?
analog signals
interference
continuity
zeros and ones
Answer:
zeros and ones
Explanation:
pls brainliest
The digital signals are generally in the form of zeros and ones.
The digital signals turn sounds into zeros and ones.
Digital SignalsAn electronic signal is transmitted as binary code that can be either the presence or absence of current, high and low voltages, or short pulses at a particular frequency. This signal is called a Digital Signal.
Digital signals take value in discrete form only at a given time.
Any digital signal can be converted into an analog signal with the help of a digital to analog converter.
If the sound signal is in the form of a digital signal, then it will turn the sound into the form of zeros and ones.
To know more about the digital signal, follow the link given below.
https://brainly.com/question/16828047.
The seniors at Citrus Hill leave for GRAD NIGHT at Disneyland at 8 p.m. they travel 60.5 miles before the stop in Anaheim. Then they return back to Citrus Hill at 7 a.m. What was the average speed of the bus?
Answer:
76
Explanation:
The speed is 76 miles per hour your welcome!!
An atom that does not have a net charge of zero is called an
Answer:
If an atom loses or gains electrons, it becomes an ion with a positive or negative charge. So an ion is a special case of an atom when it has a total charge that is not zero. Usually if someone is talking about an atom with a positive or negative total charge, they will call it an ion rather than just an atom
Explanation:
PLEASE HELP ASAP I AM GIVING 30 POINTS PLEASE HELP
An increase/decrease in which of the following variables would have the
greatest effect on the period of a simple pendulum?
We have no idea what those "following variables" are. You faded out right at the point where you were supposed to show them to us.
The period of a simple pendulum only depends on its length, and the acceleration of gravity in the place where the pendulum is swinging.
It's really tough to answer the question, because both of these things are in a fraction in the formula for the period . . . the length is the numerator, and the local acceleration of gravity is the denominator. So which one has a greater effect on the period really depends on what those numbers are before anything changes.
is heat the same as thermal energy?
Answer:
To be 100% honest im nkt sure but I'm gonna take a gander. yes i think it is the same
Answer:
Yes heat is the same as thermal energy
Explanation:
Heat is the same thing as thermal because Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. A whole branch of physics, thermodynamics, deals with how heat is transferred between different systems and how work is done in the process (see the 1ˢᵗ law of thermodynamics).
PLEASE HELP!! ILL MARK BRAINLYEST!!
The Law of Conservation of Matter is a basic principle in studying chemical reactions.
True
False
Answer:it is false
Explanation:
Which process is most responsible for moving heat through the atmosphere?
Answer:
Convection
Explanation:
Heat transfer by movement of heated materials is called convection. Heat that radiates from the ground initiates convection cells in the atmosphere.
a boy sleading down a hill accelerates
alt 1.40m/s? If he started from rest, in what
In what distance would he reach a speed.
of 7s?
Answer:
9.8
Explanation:
distance=vt
1.40*7=distance
Most people can throw a baseball farther than a bowling ball, and most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball. Explain these two situations in terms of a) Newton's first law of motion.
Complete question is;
Most people can throw a baseball farther than a bowling ball, and most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball. Explain these two apparent facts in terms of
a.) Newtons first law of motion
b.) Newtons Second law of motion
Answer:
A) Explained below
B) Explained below
Explanation:
A) The statement given is that most people find it less painful catching a flying baseball than a bowling ball flying at the same speed as the baseball.
Newton's first law states that an object at rest will continue at rest or if in motion will continue in constant motion unless an external force acts on it.
This means that the velocity has to be constant and net force is zero.
It therefore means that people will need to apply plenty of force on the bowling ball with a constant velocity in order to maintain net force equal to zero.
B) Newton's second law of motion states that force is equal to the rate of change in momentum.
The given statement in the question is true because of the amount of mass and force needed to be applied.
Now, due to the fact that the bowling ball will require a lot of force to be applied on it, it will be hard for people to throw it easily. Thus, it will be easier for most people to throw the baseball than the bowling ball
The amount of oxygen in the reactants in 4 atoms. In the products, the oxygen is distributed to water and gas. Which coefficient would be placed in front of water and oxygen
Answer:
2 for water(H2O)
1 for oxygen (O2)
Explanation:
This question is describing the decomposition of hydrogen peroxide (H2O2). Hydrogen peroxide (H2O2), which is the reactant gets broken down into water (H2O) and oxygen gas (O2). The chemical equation is as follows:
2H2O2 ---> 2H2O + O2
As described in the question, the amount of oxygen in the reactants (H2O2) is 4 atoms. The products are water and oxygen gas. To ensure that the equation is balanced, we have to use coefficients.
- Coefficient 2 has been placed in front of the water molecule to balance the number of hydrogen atoms (4) and oxygen atoms (4).
- The coefficient in front of the Oxygen gas remains 1.
Answer:
d
Explanation:
I took the test on edunuity and checked it got it right
argue on this can the speed of light be compared to the exact speed if electricity
Answer:
XD
Explanation:
XV