Answer:
a) 3.9s
b)74m
Explanation:
a) v=u+at
0=38+(-9.8)t
-38=-9.8t
t=-38/-9.8
t=3.877s
t=3.9s
b) s=ut+1/2at²
s=(38×3.9)+1/2(-9.8×3.9²)
s=148.2 -74.529
s=73.671
s=74m
Ella rode her bike 5 miles in 30 minutes. What was Ella's average speed in miles per hour? (pls helppp!)
Answer:
6 minutes per mile
HELPP PLEASE, which scientist is credited with identifying the human blood groups?
a. Mathieu Orfila
b. Karl Landsteiner
c. Walte Specht
d. Edmond Locard
Determine the 3 standing waves for a 4 m length of rope.
Harmonics, Loop and Harmonic number
Hope this helps :)
What is Speed? the ability to rest the ability to rest the ability to minimize the time cycle of a given movement the ability to minimize the time cycle of a given movement the ability to apply force the ability to apply force the ability to use oxygen?
Answer:
Speed is a scalar quantity that refers to "how fast an object is moving." Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a short amount of time.
Explanation:
The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time.
Which of the following is not a tectonic activity?
A.Volcanoes
B.Mountain Building
C.Erosion of mountains
D.Earthquakes
Answer:
Erosion of Mountains
Explanation:
Answer:
c gimme brainliest I'm right
What is the displacement of the ride between 0s and 16 s?
Answer:
See attached answer.
Explanation:
To solve this we must be knowing each and every concept related to displacement and its calculations. Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.
What is displacement?The distance along a straight line connecting an object's original and final positions is its displacement [x].
Displacements are not always a good thing. It may also be 0 or negative. A negative displacement indicates that the item has moved away from the origin and toward the right if a positive direction is situated to the right of both the origin.
If the body's velocity at a given moment in time is 'v' m/s, then displacement may be expressed mathematically as-
v = dx /dt
dx = vdt
Integrating on both sides, we get
∫dx = ∫vdt
∫dx [x = 0 to x = x] = ∫vdt [ t = 0 to t = 16 s]
x = v [16 - 0]
x = 16v
Therefore, the ride's displacement from time t = 0 s to time t = 16 s is 16v.
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The ability of the heart, blood vessels and lungs to supply oxygen to the body is?
The ability to allow the heart, blood, vessels, and lungs to supply oxygen to the body is called Cardiovascular fitness.
Which is the best reason a writer would use a unreliable narrator
Answer: Explanation:
Authors sometimes use an Unreliable Narrator to tell the story, a protagonist who can't be trusted to tell the events accurately. Either they are insane, evil, delusional, forgetful, or just plain wrong... whatever their reasons, the writer uses this technique to 'hook' the reader.
Answer: to give other characters something to react to
Alice and Tom dive from an overhang into the lake below. Tom simply drops straight down from the edge, but Alice takes a running start and jumps with an initial horizontal velocity of 25 m/s. Neither person experiences any significant air resistance. Just as they reach the lake below,
Answer:
The velocity of Alice (25 m/s) will be greater than that of Tom (0), when they reach the lake below.
Explanation:
Given;
initial horizontal velocity of Tom is zero since he dropped straight down from the edge.
initial horizontal velocity of Alice is 25 m/s.
Their respective horizontal velocity when they jumped is the same as when they reach the lake below.
If we compare their velocities when they reach the lake, one will be greater than the other, if we neglect air resistance.
Thus, the velocity of Alice (25 m/s) will be greater than that of Tom (0), when they reach the lake below.
in order to chase those balls coming from all different
Tennis takes serious
angles.
strength
balance
agility
intelligence
Answer:
i think the answer is agility I'm not sure though
Which is not true about the variables in the relationship F = ma?
A. Acceleration is directly proportional to mass.
B. Force is directly proportional to mass.
C. Force is directly proportional to acceleration.
D. Acceleration will double if force is doubled.
Answer:
A
Explanation:
Because D is definitely true and there is only one false sentence what means if that non of B or C is false because if one is false so other one needs to be too.
is it possible for a tennis ball to have more momentum than a cannonball? explain
An electric current of 0.05 A passes through a circuit that has a resistance of
15 2. According to Ohm's law, what is the voltage of the circuit?
A. 15.1 V
B. 300 V
C. 0.003 V
D. 0.75 V
The voltage of the circuit will be 0.75 V.The potential difference between the circuit is known as the voltage.
What is ohm’s law?Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.
This current-voltage connection may be expressed mathematically as,
The Equation of Ohm's Law
[tex]\rm V=IR \\\\ V= 0.05 \times 15.2 \\\\\ \rm V=0.75 \ V[/tex]
The voltage of the circuit will be 0.75 V.
Hence option D is correct.
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does anyone know the answer to this?
Answer:
The cat went up
Explanation:
at a speed of 15 m/s, how far could a dog run in 6 seconds?
Answer:
15x6=90 meters
Explanation:
i did 15x6 because it runs 15 meters per second
brainliest? >w<
Reese can run 10 meter in 5 seconds.What is her speed?
Answer:
2 meters per second
Explanation:
what are the units for gravitational field strength ?
Answer:
gravitational field strength (g) is measured in newtons per kilogram (N/kg)
How far from the nucleus in angstroms (1 Å = 10-10 m) is the electron in a hydrogen atom if it has an energy of -8.72 * 10-20 J?
Answer:
1200
Explanation:
Which two spheres are interacting when there is a rainbow ? Please help make you brainiest.
Answer: Honestly miss im not sure but i am pretty sure it is The HYDROSPHERE AND THE GEOSPEHER. I figured it out. Pls give me brainlest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
As a vehicle approaches a stop sign, the driver applies the brakes and brings the vehicle to a stop. How is this action explained using Newton’s Second Law?
Which answer best explains why clouds usually form high in the sky?
It is cool enough for the water vapor to begin condensing
It is warm enough for the water vapor to begin condensing
It is dry enough for precipitation to form from
it is dry enough for water vapor to form a cloud
Answer: As air rises the moisture in it slowly reaches its saturation point and when this happens, tiny crystals of water start to condense and form clouds.
Explanation:
NEED HELP ASAP WILL MARK BRAINLIEST
Isotopes are _____________.
Compounds
Atoms of the same element but with different mass
Atoms that have a charge
Atoms of different elements
Answer:
A. Atoms of the same element but ith different mass.
Explanation:
Answer: Isotopes are Atoms of the same element but with different mass
Explanation: Atoms of the same element but with different mass
The force of gravity of the sun on earth in December compared to June is ?
Answer:
Earth is slightly closer to the Sun in December than it is in June. The force of gravity is slightly smaller
Explanation:
A student leaves a pencil on a desk and the pencil stays in the same spot until another student picks it up. Which law would that be?
The first law
In Newtons first law it states that an object will not change its motion unless a force acts upon it.
Answer:1st law
Explanation:
Does mass change when volume does
Answer:
Yes
Explanation:
a car is initially moving at 10 m/s and accelerates at a constant rate of 2 m/s^2 for 4 seconds, in a straight line. How far did the car carvel during this time?
A car is initially moving at 10 m/s and accelerates at a constant rate of 2 m/s², then the car will travel 56 meters.
What is Acceleration?The rate of change in an object's velocity concerning time is known as acceleration in mechanics. The vector quantity of accelerations. The direction of the net force that is acting on an object determines its acceleration.
Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well. The definition of acceleration is the change in velocity vector over a time interval divided by the time interval.
There are several types of acceleration :
Uniform AccelerationNon-Uniform AccelerationAverage AccelerationAccording to the question, the given values are :
Initial Speed, u = 10 m/s
Acceleration, a = 2 m/s²
Time, t = 4 sec.
Use the Equation of motion to find the distance,
s = ut + 1/2 at²
s = 10(4) + 1/2 (2)(4)²
s = 40 + 16
s = 56 meters.
Hence, the distance traveled by car will be 56 meters.
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In a drill during basketball practice, a player runs the length of the 30-meter court and back. The player does this three times in 60 seconds. The magnitude of the player's average velocity during the drill is...
1. 0 m/s
2. 0.5 m/s
3. 1 m/s
4. 1.5 m/s
5. 3 m/s
6. 30 m/s
Answer:
3.0m/s so it’s number 5
Explanation:
The magnitude of the player's average velocity during the drill is 0 m/s.
The given parameters;
length of the court, L = 30 mnumber of times, = 3time of motion, t = 60 sAverage velocity is change in displacement per change in time of motion.
[tex]\Delta \bar v = \frac{\Delta x}{\Delta t}[/tex]
where;
[tex]\Delta x[/tex] is the change in displacementThe change displacement is zero, since the player moved forward and back to the exact initial position.
[tex]\Delta \bar v = \frac{3(30) - 3(30) }{60} = 0[/tex]
Thus, the magnitude of the player's average velocity during the drill is 0 m/s.
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Write the equivalent formulas for velocity, acceleration, and force using the relationships covered for UCM, Newton’s Laws, and Gravitation.
Answer:
The newton’s second law is F=ma
The Gravitational force is [tex]F=\dfrac{Gm_{1}m_{2}}{r^2}[/tex]
Explanation:
Given that,
The equivalent formulas for velocity, acceleration, and force using the relationships covered for UCM, Newton’s Laws, and Gravitation.
We know that,
Velocity :
The velocity is equal to the rate of position of the object.
[tex]v=\dfrac{dx}{dt}[/tex]....(I)
Acceleration :
The acceleration is equal to the rate of velocity of the object.
[tex]a=\dfrac{dv}{dt}[/tex]....(II)
Newton’s second Laws
The force is equal to the change in momentum.
In mathematically,
[tex]F=\dfrac{d(p)}{dt}[/tex]
Put the value of p
[tex]F=\dfrac{d(mv)}{dt}[/tex]
[tex]F=m\dfrac{dv}{dt}[/tex]
Put the value from equation (II)
[tex]F=ma[/tex]
This is newton’s second laws.
Gravitational force :
The force is equal to the product of mass of objects and divided by square of distance.
In mathematically,
[tex]F=\dfrac{Gm_{1}m_{2}}{r^2}[/tex]
Where, m₁₂ = mass of first object
m= mass of second object
r = distance between both objects
Hence, The newton’s second law is F=ma
The Gravitational force is [tex]F=\dfrac{Gm_{1}m_{2}}{r^2}[/tex]
the correct symbol for the metric (SI) unit of temperature is
A: k
B: t
C: f
D: c
C (Celsius) is the correct symbol for the metric (SI) unit of temperature. The correct option is D.
The Celsius scale is widely used for measuring temperature in the metric system.
The symbol "°C" is used to represent degrees Celsius. It is named after the Swedish astronomer Anders Celsius, who introduced the scale in the 18th century.On the Celsius scale, the freezing point of water is defined as 0 degrees Celsius, and the boiling point of water is defined as 100 degrees Celsius at standard atmospheric pressure.The Celsius scale is an integral part of the International System of Units (SI), which is the modern metric system used for scientific and everyday measurements.In certain scientific and engineering fields, such as thermodynamics, the Kelvin scale (symbol: K) is also used as an absolute temperature scale but the SI unit of temperature is Celsius.
Thus, the correct option is D.
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As you grow and learn, your neurons continue to connect, making you better at the
things you do.
False
True
True. When you learn something new neurons make connections and retain that knowledge. That means the more you learn a skill the more connections you make and the more muscle memory you get from doing that skill. Thus you get better at that skill.
Answer:
true
Explanation: