If you wanted to learn more about ancient scientific knowledge, whose life
would you research?
Answer:
I would like to research Nikola Tesla's life
A girl is out jogging at 2.00 m/s and accelerates at 1.50 m/s^2 until she reaches a velocity of 5.00 m/s. How far does she get?
Answer:
7.00 m
Explanation:
Given:
v₀ = 2.00 m/s
v = 5.00 m/s
a = 1.50 m/s²
Find: Δx
v² = v₀² + 2aΔx
(5.00 m/s)² = (2.00 m/s)² + 2(1.50 m/s²)Δx
Δx = 7.00 m
If the box moves at a constant velocity, what do you know about the forces acting on the object?
A)The forces are balanced.
B)The forces are unbalanced.
C)The forces are in outerspace
D)The box has friction
ILL MARK YOU THR BRAINLIEST SOMEONE PLS HELP ITS URGENT.
The acceleration of a skydiver of mass 80 kg changes from 9.8 m/s ^ 2 to 5.8 m/s ^ 2 as he falls through the air. What is the air resistance experienced by him?
Answer:
320N
Explanation:
Net force =w- AR
AR=w -force
AR=mg- ma
AR=80*9.8- 80*5.8
AR=784- 464
AR=320N
A truck accelerated from a velocity of 20 m/s to velocity of 5 m/s in a period of 5 seconds. Determine the acceleration of the truck with the proper units.
A. 2 meters/ second
B. -3 meters/ second
C. 3 meters/ second squared
D. -3 meters/ second squared
All engines operate at less than 100 percent efficiency because they
A. absorb heat
B. conduct heat
C. burn gasoline
D. emit heat
Answer:
It is B or D, but I may be leaning a little more towards D.
Explanation:
Calculate the wavelength of an electron mass 9.1*10^-31kg moving with a velocity of 2.0*10^6m/s (h=6.63*10^-34Js) (Hint: De Broglie's wavelength)
Answer:
Wavelength, [tex]\lambda=3.64\times 10^{-10}\ m[/tex]
Explanation:
We have,
Velocity an electron is [tex]2\times 10^6\ m/s[/tex]
Mass of an electron is [tex]9.1\times 10^{-31}\ kg[/tex]
It is required to find the wavelength of electron. The De-Broglie wavelength of an electron is given by :
[tex]\lambda=\dfrac{h}{mv}[/tex]
h is Planck's constant
[tex]\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-31}\times 2\times 10^6}\\\\\lambda=3.64\times 10^{-10}\ m[/tex]
So, the wavelength of an electron is [tex]3.64\times 10^{-10}\ m[/tex].
Does anyone know how to do this question???
Force = 7kN
Pressure = 1mPa
Area = ?
Answer:
7000 m^2
Explanation:
Pressure=Force/Area
1=7000/Area
1(Area)=7000
Area=7000 m^2
Help ASAP please (: The waves with the MOST energy have
amplitudes.
frequencies and
A) low; large
B) low; small
C) high; large
D) high; small
Answer: C
high; large
Explanation:
The wave energy is related to its amplitude and frequency.
The wave energy is proportional to the amplitude of the wave. So, wave with the most energy will have high amplitude.
Also, frequency is related to wave energy. The larger the frequency, the more the energy of the wave.
Therefore, The waves with the MOST energy have high amplitudes and large
frequencies.
Question 5(Multiple Choice Worth 4 points) (01.04 MC) Which of the following correctly describes the relationship between speed and velocity? Speed is the change in velocity over time; velocity is distance plus direction. Speed is the change in distance over time; velocity is speed plus direction. Speed is distance plus direction; velocity is speed plus time. Speed is the change in acceleration; velocity is distance over time.
Answer:
Speed is the change in distance over time; velocity is speed plus directionExplanation:
Speed is defined as the change in distance covered by a body with respect to time while velocity the change in displacement of a body with respect to time. Speed is a scalar quantity since it does not specifies direction while velocity is a vector quantity because it specifies both magnitude and direction.
Speed can only be equal to the velocity if it also specifies direction.
Based on the definition above, it can be concluded that speed is the change in distance over time and velocity is speed plus direction.
Answer:
Speed is the change in distance over time; velocity is speed plus direction.
Explanation:
I did it and got the test right
Why can a liquid take the shape of the bottom of its container?
Answer:
Liquids take on the shape of their container because they contain particles that can slide past each other. Particles in a solid,
Explanation:
Answer: Liquids take on the shape of their container because they contain particles that can slide past each other.
Two students walk out on the broken bridge together. As they reach the end of the bridge, what would happen to their gravitational potential energy.
A)Decrease
B)increase
C)Remain the same
D)None of the above
Answer: C
Explanation: I dont realy know what this means. but it will not increase because your not getting closer to earths center of gravity and not decreasing because your not high enough in the atmosphere.
As a charged object approaches a neutral object the objects.......
attract
spin
repel
no interaction
Answer:
attract is the answer.
Answer:
It attracts
Explanation:
It attracts the object
Which one of the following is not equivalent to 2.50 miles?
(1.00 mi = 1.61 km = 5280 ft, 1.00 yd = 3.00 ft = 12.0 in.)
(A) 1.32 x 104 ft
(B) 1.58 x 105 in
(C) 4.02 x 103 km
(D) 4.40 x 103 yd
(E) 4.02 x 105 cm
Answer:
Choice C is not equivalent to 2.50 miles.
Explanation:
The given data is now converted into feet, inches, kilometers, yards and centimeters:
mi - ft
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)[/tex]
[tex]x = 13200\,ft[/tex]
[tex]x = 1.320\times 10^{4}\,ft[/tex] (Choice A)
mi - in
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)\cdot \left(12\,\frac{in}{ft} \right)[/tex]
[tex]x = 158400\,in[/tex]
[tex]x = 1.584\times 10^{5}[/tex] (Choice B)
mi - km
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)[/tex]
[tex]x = 4.025\,km[/tex] (Different from Choice C)
mi - yd
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi}\right) \cdot \left(\frac{1}{3}\,\frac{yd}{ft} \right)[/tex]
[tex]x = 4400\,yd[/tex]
[tex]x = 4.40\times 10^{3}\,yd[/tex] (Choice D)
mi - cm
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)\cdot \left(100000\,\frac{cm}{km}\right)[/tex]
[tex]x = 402500\,cm[/tex]
[tex]x = 4.025\times 10^{5}\,cm[/tex] (Choice E)
Choice C is not equivalent to 2.50 miles.
explain why the statement “Dropped objects fall toward the ground" is a law and not a theory
The statement is a law because it accurately describes EVERY observation. No contradiction has ever been observed that would disprove it, or even cast doubt on it.
(Wellll ... at least, no contradiction that wasn't immediately and easily explainable, like dropping a helium balloon, or a sheet of paper in a high wind.)
The statement is legal because it accurately describes all that is seen. No controversy has ever arisen to disprove it or cause it to doubt.
What is gravity?The force of gravity is the force that the planet or another body of gravity absorbs. Gravity holds all the planets in orbit around the sun.
What causes gravity?The greater the size of the two objects and the shorter the distance between them, the stronger the gravitational force. We also know that gravity can work in a complex system with several components.
Learn more about gravity here: brainly.com/question/4208016
#SPJ2
A spherical mirror and a thin spherical lens have each a focal length of +10cm , the mirror and the lens are likely to be
Answer: Concave mirror and convex lens
Explanation: A spherical mirror and a thin spherical lens have each a focal length of +10cm, this means that distance of any object from the mirror is +10 metres.
While for the lens, the distance of any object to the other side of the lens is +10 metres. Therefore, the mirror is concave mirror and the lens is a convex lens.
A wooden object (conically shaped) has a diameter of 8cm and height of 14cm. It floats in oil with 6cm of its height above oil level. Determine (a)The density of the object (b) If the volume of oil is twice that of the object, what fraction of oil is displaced after immersing the object?
Answer:
(a) The density of the object is 316/343 × the density of the oil
(b) The fraction of oil displaced after immersing the object is 0.461 of the oil volume
Explanation:
(a) The volume, V of a cone of height, h and base diameter, D = 2×r is given by the following equation;
[tex]V = \dfrac{\pi r^{2} h}{3}[/tex]
The volume of the object is therefore;
[tex]\dfrac{\pi \times 4^{2} \times 14}{3} = 74\tfrac{2}{3}\pi \, cm^3[/tex]
Where 6 cm is above the oil level we have;
[tex]\dfrac{\pi \times \left (6 \times \dfrac{4}{14} \right )^{2} \times 6}{3} = 5\tfrac{43}{49}\pi \, cm^3[/tex] above the oil level
Therefore, volume of the oil displaced = [tex]68\tfrac{116}{147}\pi[/tex] cm³ = 216.11 cm³
The density of the object is thus;
[tex]\dfrac{68\tfrac{116}{147}\pi}{ 74\tfrac{2}{3}\pi} \times Density \ of \ the \ oil = \dfrac{316}{343} \right ) \times Density \ of \ the \ oil[/tex]
The density of the object = 316/343 × the density of the oil.
(b) The volume of the oil = 2 × Volume of the object = [tex]2 \times 74\tfrac{2}{3}\pi \, cm^3 = 149\tfrac{1}{3}\pi \, cm^3[/tex]
The fraction of the volume displaced, x, after immersing the object is given as follows;
[tex]x = \dfrac{68\tfrac{116}{147}\pi}{ 149\tfrac{1}{3}\pi} = \dfrac{158}{343} = 0.461[/tex]
The fraction of oil displaced after immersing the object = 0.461 of the volume of the oil
A large force will cause_______ acceleration than a small force
Answer:
A large force will produce more acceleration than a small force acting on the same object.
3.If a force of 12 N is applied to an object with a mass of 2 kg, what will be its acceleration?
Answer:
6 m/s^{2}
Explanation:
The formula for force is
F = mass x acceleration
F = 12 N
mass = 2 kg
So, you can change the formula to solve for acceleration.
acceleration = F / mass
a = 12 N / 12 kg
a = 6 m/s^{2}
The mass of Mars is 6.42 × 1023 kg. Its moon Phobos is 9378 kilometers away from Mars and has a mass of 1.06 × 1016 kg. What is the gravitational force between Mars and Phobos? 5.16 × 1015 N 5.16 × 1021 N 4.84 × 1022 N 4.84 × 1025 N
Answer:
A on Edge 5.16 x 10^15 N
Explanation:
The gravitational force between Mars and Phobos is 5.16*10^15 N.
Using the formula
F = G m1 m2/ r^2
= 6.67*10^-11*6.42*10^23*1.06*10^16/(9378)^2
= 45.39*10^28/87946884
= 5.16 * 10^15 N
What is gravitational force ?"The force of attraction on a body by earth is called gravitational force." Example : The leaves and fruits fall from a tree downwards towards the ground, water in a river flows down streams, a ball thrown up goes to a height and then returns back on ground are some examples of motion due to gravitational force.
What is phobos ?"Phobos is the larger of Mars' two moons and is 17 x 14 x 11 miles (27 by 22 by 18 kilometers) in diameter. It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen."
Know more about gravitational force here
https://brainly.com/question/24783651
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M
An object has a mass of 5.52 g and a volume of 12 mL. What is the density of the object
Answer:
0.46 g/mL
Explanation:
Density can be found using the following formula.
[tex]d=\frac{m}{v}[/tex]
where d is density, m is mass, and v is volume.
We know that the object has a mass of 5.52 grams and a volume of 12 milliliters.
m=5.52 g
v=12 mL
Substitute these values into the formula.
[tex]d=\frac{5.52 g}{12 mL}[/tex]
Divide 5.52 by 12
5.52/12=0.46
d=0.46 g/mL
The density of the object is 0.46 g/mL, and option C is correct.
Suppose you roll a bowling ball (m1)down the alley, and the ball strikes the pin (m2) sending it flying. The mass of the bowling ball is greater than the mass of the
pin. Predict the magnitude of the forces between the two objects during the collision
A)The bowling ballexerts a larger force on the pin because it was moving at
a high speed,
B)The pin exerts a larger force on the bowling ball
C)The bowing ball exerts a larger force on the bin because it is more massive
D)Both objects blert the same magnitude of force on each other due to Newtonsard Law
Answer:
The correct option is;
D) Both objects exert the same magnitude of force on each other due to Newton's 3rd law
Explanation:
Newton's third law of motion states that for every action there is an equal and opposite reaction
Since the bowling ball is rolled down the alley while the pin is displaced at such a speed that it flew, we have that the velocity of the rolling ball, v₁ is less than the velocity of the flying pin v₂
Therefore, whereby force = Rate of change of momentum produced we have;
The change of momentum of the ball = m₁×(v₁ - v₁ₐ)
The change of momentum of the pin = m₂×(0 - v₂)
Hence since the pin change in movement (flight) was more suddenly than the slowing down of the ball, the action of the rolling ball is equal to the reaction of the flying pin.
If it’s a full moon how much of the moon are you actually seeing ?
Answer:
half of the moon
Explanation:
cause your seeing the front of it
Answer:
The light side of the moon so only half
Explanation:
I'M ON A TIMER Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. Simon says that the clay appears red because it allows red wavelengths to pass through it. Which statement best explains who is correct? Ingrid is correct. The clay appears red because it is opaque. Ingrid is correct. The clay appears red because it is a type of matter. Simon is correct. The clay appears red because it is opaque. Simon is correct. The clay appears red because it is a type of matter.
Answer:
Ingrid is correct. The clay appears red because it is a type of matter.
Explanation:
Explanation: It is A because it only shows red because it only reflects red. If it let any other color pass through it then it could reflect any color.
Hannah knows she has some natural skill at field hockey, but she never practices in the off season. This is an example of
Answer:
wasting talent
Explanation:
which property of substances help to make a thermometer?
I NEED HELP.
Answer:
Mercury
Explanation:
Mercury streches when it is hot so that is why it goes up when the temperature is higher
Charge q is 1 unit of distance away from the source charge S. Charge p is two times further away. The force exerted
between S and q ls the force exerted between S and p.
Answer:
The correct answer will be "1/16".
Explanation:
The force or distance between two substances in charge seems to be inversely proportional to the square of the size of the particles.
The exerted force between "S" and "q" will be:
⇒ [tex]Fsq=\frac{{Q}'}{Q} 1^2[/tex] ...(equation 1)
The exerted force between "S" and "p" will be:
⇒ [tex]Fsp=\frac{{Q}'}{Q} 4^2[/tex] ...(equation 2)
Now,
On the comparison of "equation 1" and "equation 2", we get
⇒ [tex]\frac{1}{16}[/tex]
Two bumper cars collide and then move away from each other. The forces exerted are:
A. Equal and opposite
B. Opposite
C. Equal
Answer:
the answer is b
Explanation:
if it was equal they would move away from each other
Question 2 (2 points)
Practice tests are available online.
True
False
K12
A plane increases its speed from 450 km/hr to 750 km/hr in 0.30 hour. What is its acceleration?
Answer:
The acceleration is found as:
a = 1000 km/h²
Explanation:
Initial speed of the plane = 450 km/h
Final speed of the plane = 750 km/h
Time taken = 0.3 h
Acceleration can be defined as the change of speed of the object divided by the time taken to bring that change
Acceleration is given as:
[tex]a=\frac{v_f-v_i}{t}[/tex]
where v(f) = 750 km/h , v(i) = 450 km/h , t = 0.3 h
Substitute the values in the equation of acceleration
[tex]a= \frac{750-450}{0.3}\\a=\frac{300}{0.3}\\a=1000 km/h^2[/tex]
This is the found result
