Answer:
[tex] \huge{ \boxed{ \bold{ \sf{8.13 \: seconds}}}}[/tex]
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☯ Question
A car accelerates at 2.90 m/s . Assuming the car starts from rest , how much time does it need to accelerate to a speed of 23.6 m/s ?☯[tex] \underbrace{ \sf{Required \: Answer : }}[/tex]
✒ Given :
Initial velocity ( u ) = 0 Final velocity ( v ) = 23.6 m/sAcceleration ( a ) = 2.90 m/s²✒ To find :
Time ( t )✎ We know ,
[tex] \boxed{ \underline{ \sf{acceleration \: (a) \: = \frac{final \: velocity \: (v) - initial \: velocity \: (u )}{time \: ( \: t \: )}}}}[/tex]
Substitute the values :
➵ [tex] \sf{2.90 = \frac{23.6 - 0}{t}} [/tex]
➵ [tex] \sf{2.90 = \frac{23.6}{t}} [/tex]
Apply cross product property
➵ [tex] \sf{2.90 \: t \: = 23.6}[/tex]
Divide both sides by 2.90
➵ [tex] \sf{ \frac{2.90 \: t}{2.90} = \frac{23.6}{2.90} }[/tex]
➵ [tex] \sf{t = 8.13 \: seconds}[/tex]
Hope I helped!
Have a wonderful time シ
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What is the basic action of any muscle
The main and basic action of any single muscle that would have on a body would be the fact that it would contain "contraction" to which your muscle would practically contract each other, which would then give to power to force, push, push, and to make work, and also, to move.
PLEASE MARK ME AS BRAINLIEST
Answer:
The person above is correct, The Answer is "CONTRATION" just verified it by ap.ex ;)
Explanation:
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Answer:
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Explanation:
. TRUE OR FALSE: ALL THE FOOD WE EAT TODAY STARTED OUT AS WILD VERSIONS.
Answer:
i believe its true
Explanation:
i hope this helps
Answer:
maybe true
Explanation:
if we eat good then we will stay healthy
Object X and object Y, of charge +Q and −2Q, respectively, are separated by a distance r0, as shown in the figure.
(a) Determine an equation for the magnitude and direction of the electric force that is exerted on object Y from object X in terms of Q, r0, and physical constants, as appropriate.
(b) The charge of object X is changed so that it has a charge of −4Q, and the separation distance between the two objects is changed to 2r0. In a clear, coherent paragraph-length response that may also contain figures and/or equations, predict how the electric force exerted on object Y from object X changes from part (a), and predict how the net charge of the two object system changes from part (a).
Answer:
(a) The magnitude of the force electric force F = k ×(+Q) × (-2·Q)/r₀² = -2·Q²/(r₀²) which can be written as follows;
[tex]F = \dfrac{k \times (+ Q) \times (-2\cdot Q)}{r_0^2} = -\dfrac{k \times 2 \times Q^2}{r_0^2}[/tex]
Given that the charge of Y is twice the charge on X, we have the charge X will move towards the charge Y which is the +x direction
(b) The force, F, acting between the charges is given as follows;
[tex]F = \dfrac{k \times Q_1 \times Q_2}{r_0^2}[/tex]
When, Q₁ = X = -4Q, Q₂ = Y = -2Q, and r₀ = 2·r₀ we have;
[tex]F = \dfrac{k \times (-4\cdot Q) \times (-2\cdot Q)}{(2 \cdot r_0)^2} = \dfrac{k \times 8 \times Q^2}{4 \cdot r_0^2} = \dfrac{k \times 2 \times Q^2}{r_0^2}[/tex]
Therefore, the electric force exerted on object Y by the object X is the same and acts in an opposite direction to the force of X on Y in (a)
The net charge of the two objects in part (a) is Q - 2Q = -Q
The net charge of the two objects in part (b) is -4Q - 2Q = -6Q
Therefore, the net charge increases by a factor of 6 in part (b)
Explanation:
Grain is pouring into a silo to be stored for later use. Due to the friction between pieces of grain as they rub against each other during the pouring process, one piece of grain picks up a charge of 6.0 E -10 C and another piece of grain picks up a charge of 2.3 E -15 C. What is the electric force between them if the pieces of grain are 2 cm apart?
Answer:
F = 3.105 10⁻²⁰ N
Explanation:
For this exercise let's use Coulomb's law
F = k q₁ q₂ / r²
in this case each of the grains has a charge
q1 = 6.0 10⁻¹⁰ C
q2 = 2.3 10⁻¹⁵ C
and they are separated by a distance r = 2 cm = 0.02 m
let's substitute
F = 9 10⁹ 6.0 10⁻¹⁰ 2.3 10⁻¹⁵ / 0.02²
F = 3.105 10⁻²⁰ N
So the Fahrenheit scale has 180 divisions. But its highest temperature is 212. Im kinda confused..... what is the purpose of divisions??
Answer:
The melting and boiling point of water in Fahrenheit scale is divided into 180 equal intervals, that means each division denoting 1°F.
division means their melting and boiling point is divided into 180 equal intervals that means each division indicates 1 degree F.
Which Period 3 element would you expect to have the highest electrical and
thermal conductivity?
A. Chlorine (CI)
B. Phosphorus (P)
C. Sulfur (S)
D. Sodium (Na)
Answer:
The correct option is D
Explanation:
Generally, thermal and electrical conductivity is affected by valence electrons in an atom. These valence electrons carry electric charges (or conduct heat as the case may be) throughout the atom. The fewer the valence electrons, the higher its conductivity - this is as a result of free movement within the atom. The higher the valence electrons, the lesser its conductivity and when the outermost electrons have completely filled the outermost shell, the atom would be an insulator as there won't be carriers of electric charges.
Hence, from the above, sodium would be expected to have the highest electrical and thermal conductivity because it has just one electron in it's outermost shell
Answer:D
Explanation: got it right
why the blood pressure in human body is greater at the feet than at the brain. please help!!!!
Answer:
The pressure of liquid column is given by p=hpg, where h is depth, p is density and g is acceleration due to gravity.
Therefore, pressure of the liquid column increases with depth. The height of the blood column in a human body is more at feet than at the brain. Therefore, the blood pressure in humans is greater at the feet than the brain.
Answer:
the above answer is correct hope it's help you have a great day ☺☺keep smiling be happy stay safe
A chemical reaction [can/cannot] change an element into another element.
What does the research show are the most favorable conditions for attitude change?
In terms of attitude change, the fundamental tenet of the cognitive theory would be that individuals are typically driven to lessen dissonance, which could be accomplished by altering their attitudes but also beliefs.
What is cognitive theory ?Cognitive theories concentrate on the premise that how exactly what people think causes the arousal of emotions, suggesting that some thoughts, as well as beliefs, as well as beliefs, contribute to healthy emotions as well as adaptive behavior while others lead to disturbing emotions and behaviors.
What is attitude change?When people sense unease or guilt as a result of cognitive dissonance, they can actively lessen the dissonance by altering their attitude, beliefs, and even conduct in relation to it in order to attain consistency with both the contradictory cognitions.
In terms of attitude change, the fundamental tenet of the cognitive theory would be that individuals are typically driven to lessen dissonance, which could be accomplished by altering their attitudes but also beliefs.
To know more about attitude change
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PLEASE HELP!! ILL MARK BRAINLYEST!!!
The heat of vaporization of water is one of the highest known.
True
False
Answer:
it's true...........
A peach has a layer of skin, a thick section of fruit, and a pit in the center. Which of these would a peach be a good model for?
A.
the ocean
B.
the Sun
C.
the solar system
D.
the Earth
Answer:
The earth
Explanation:
Answer:
D. the Earth
Explanation:
The Earth has a solid metal core at the center, which is similar to the pit of a peach. The Earth also has many thick layers of rock and liquid metal between the surface and the center of the Earth, similar to how a peach has a layer of skin and a thick section of fruit. The other answer choices don't have any similarities to a peach. The ocean is entirely liquid, the sun is a ball of gas, and the solar system contains lots of different planets and stars that all are made up of very different things.
At the top of a hill that is 4.37 meters high, a 70 kg skate boarder has 3000 1 point
joules of potential energy. What is his speed at the bottom of the hill where
his potential energy is zero?
Answer:
9.26m/s
Explanation:
Given parameters:
Height of the hill = 4.37m
Mass of skate boarder = 70kg
Potential energy = 3000J
Unknown:
Speed at the bottom of the hill = ?
Solution:
At the bottom of the hill, the total potential energy is the same as the kinetic energy.
Potential energy = Kinetic energy
mgh = [tex]\frac{1}{2}[/tex]mv²
2mgh = mv²
v² = 2gh
v = √2gh
g is the acceleration due to gravity
h is the height
v = √2 x 9.8 x 4.37 = 9.26m/s
What type of motion does an object have if it is falling with terminal velocity ?
Answer:
I believe force :|
Explanation:
A 15 kg bowling ball is moving at 5m/s down the bowling lane, calculate its
momentum
A boat starts moving across a river at velocity v perpendicular to the river bank.
The boat encounters a current along the river of velocity u, as shown.
u
river
Which vector diagram shows the resultant velocity r of the boat?
A
B
с
D
u
A
r
u
A car starts from rest and accelerates at 15 m/s2 for 3.0 s. What is its top speed?
Answer:
45m/s
Explanation:
V=t*a =15*3= 45m/s
The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result?
Alt decreases
Answer:
kinetic energy increases because of speed and motion overall
Explanation:
dont know if i helped you but you can give me a thumbs down if you hate the answer or it is not the answer you are looking for
Which describes increasing the efficiency of an energy resource?
A>Making cars that get better gas mileage
B>Using biomass instead of coal
C>Turning off the lights when leaving a room
D>Switching from coal to solar
Answer:
i say A : )
Explanation:
Shelley gives her little sister a 5-meter head start in a bike race. The race ends 15 meters east from where Shelley started. If her little sister completes the race in 5 seconds, what is her sister’s average velocity? (Round your answer to the nearest whole number.)
Answer:
B.) 2 m/s
Explanation:
I hope this helps!! ( Sorry if my handwriting is hard to read, I´m working on making it neater at the moment. )
Answer the questions to help you understand your parachute and forces experiment. Use the data table below to record your data. A sample entry has been made for you.
Note: For size, measure the distance between two parallel sides of the hexagon.
Write the specific heat capacity of iron
Answer:
0.451
Explanation:
pls answer quick & an accurate answer will get brainliest
Answer:
3.766 kg or 3.7 kg
Explanation:
F= M*A equation
A 438 gram ball is traveling east at 39 m/s when it is hit by a 2.4 kg softball bat. After being in contact with the bat for 302 ms, the ball rebounds at a speed of 28 m/s.
Determine the impulse vector (magnitude and direction) in kg*m's felt by the bat. Treat east as the positive direction.
Answer:
The magnitude of the impulse vector of the bat is 29.346 kg.m/s
The direction of the impulse vector of the bat is in the initial direction of the ball before impact
Explanation:
The given parameters are;
The mass of the ball, m₁ = 438 g
The speed of the ball = 39 m/s
The mass of the softball bat = 2.4 kg
The time of contact = 302 ms = 0.302 seconds
The speed of rebound = 28 m/s
The impulse = The change in momentum = Δp = F × Δt = m × Δv
The impulse on the ball = m₁ × Δv = 0.438 × (39 - (-28)) = 29.346 kg·m/s
Given that force of reaction of the bat is in opposite direction but equal to the force of the ball, and the time and the duration of contact with the ball is the same for both the ball and the bat, the impulse vector ore equal and opposite
Therefore, the magnitude of the impulse vector of the bat = 29.346 kg.m/s
The direction of the impulse vector of the bat = The initial direction of the ball before impact.
NEED HELP!?Which of the following combinations would result in the greatest acceleration?
A 60N & 2.0kg
B 1N & 0.20kg
C 5N & 0.35 kg
D 12N and 1.0 kg
Answer:
The greatest acceleration is presented in option A 60N & 2.0kg
Explanation:
The second Newton's law relates the net force F exerted on an object of mass m and the acceleration it has by the equation:
F=m.a
The acceleration is found by solving the equation for a:
[tex]\displaystyle a=\frac{F}{m}[/tex]
Let's compare the different options and choose the greatest acceleration.
A F= 60 N, m= 2 Kg.
[tex]\displaystyle a=\frac{60}{2}=30\ m/s^2[/tex]
B F= 1 N, m= 0.20 Kg.
[tex]\displaystyle a=\frac{1}{0.2}=5\ m/s^2[/tex]
C F= 5 N, m= 0.35 Kg.
[tex]\displaystyle a=\frac{5}{0.35}=14.29\ m/s^2[/tex]
D F= 12 N, m= 1 Kg.
[tex]\displaystyle a=\frac{12}{1}=12\ m/s^2[/tex]
The greatest acceleration is presented in option A 60N & 2.0kg
"W trudnych sytuacjach człowiek znajduje w sobie siłę i odwagę by walczyc " napisze rozprawke w której rozważe w jaki sposób sytuacja zagrożenia wpłynęła na postawę winicjusza i innego bohatera z lektury obowiązkowej
Answer:
Is this even english?
Explanation:
Its unreadable.
What is the net force of a motorcycle if it has a mass of 250 kg and an acceleration of 68 m/s2?
An autographed baseball rolls off of a 0.93 m high desk and strikes the floor 0.56 m away from the desk. How fast was it rolling on the desk before it fell? The acceleration of gravity is 9.81 m/s^2. Answer in units of m/s.
First of all, how long does it take it to fall 0.93m to the floor ?
Distance falling from rest = (1/2) · (g) · (T²) <== memorize this formula
(0.93 m) = (1/2) (9.8m/s²) (T²)
Divide each side by (4.9 m/s²) : T² = (0.93/4.9) = 0.1898 s²
Square root each side: T to hit the floor = 0.436 second
It got 0.56m away from the desk horizontally in 0.436 sec.
Speed = (distance) / (time) <=== memorize this formula
Speed = (0.56 m) / (0.436 sec)
Speed = 1.28 m/s
HELPP ILL GIVE 20 BRAINLIST!!!
__________ powers are powers in which authority is shared by both the federal and state governments.
A.
Reserved
B.
Federalist
C.
Delegated
D.
Concurrent
Please select the best answer from the choices provided
A
B
C
D
Answer:
C. Delegated
Explanation:
Answer:
its letter C
Explanation:
just trust
STATION
Solving Equations
A girl pushes on a box with a mass of
42 kg and it moves at an acceleration
of 7m/s2. With what force does the
girl push on the box?
J. 6 N
K. 35 N
L. 49 N
M. 294 N
Someone please answer it’s due today and I am so confused
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
What is force?Force is simply a push or pull capable of changing the state of rest or motion of an object.
From Newton's second law of Motion;
F = ma
Where m is mass of object and a is acceleration.
Given the data in the question;
Mass of box m = 42kgAcceleration a = 7m/s²Force applied F = ?We substitute our given values into the expression above.
F = ma
F = 42kg × 7m/s²
F = 294kgm/s²
F = 294N
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
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