The correct answer is B) the net force acting on the object must be zero.
If an object is moving at a constant velocity and in a straight line, it means that the net force acting on the object is zero. This is because the velocity of an object is a measure of its speed and direction of motion, and if an object is moving at a constant velocity, it means that its speed and direction are not changing. In order for an object to change its velocity, there must be a net force acting on it. If the net force is zero, the object will continue to move at a constant velocity in a straight line.
A) there are no forces acting on the object is incorrect, because there are always forces acting on an object, such as gravity, friction, and air resistance.
C) the net force acting on the object is pushing in the same direction the object is traveling is incorrect, because if the net force is pushing in the same direction as the object is moving, it would cause the object to accelerate in that direction, rather than maintaining a constant velocity.
D) the net force acting on the object is pushing in the opposite direction the object is traveling is incorrect, because if the net force is pushing in the opposite direction as the object is moving, it would cause the object to decelerate or change direction, rather than maintaining a constant velocity.
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The question is -
When observing an object, you determine it is moving at a constant velocity and in a straight line. Which of these BEST describes the situation?
A) there are no forces acting on the object
B) the net force acting on the object must be zero
C) the net force acting on the object is pushing in the same direction
the object is traveling
D) the net force acting on the object is pushing in the opposite direction the object is traveling
Please help!!A camera lens 13.3 cm from a
flower makes an image at a
distance of 2.25 cm from the lens,
on the film. What is the focal
length of the lens?
(Unit = cm)
Answer:
f=1.92 cm
If ans is correct reply for explanation.
The typical focal length formula looks as follows: 1/Focal length = 1/Image distance + 1/Object distance , where: Image distance and Object distance are given in mm.
1/f = 1/u + 1/v
1/f = 1/133 + 1/22.5
= 0.007 + 0.044
= 0.0514 mm
What is focal length ?"The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light."
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All waves change speed when they enter a new medium, but they don't always bend. When does bending occur?
Bob and Sarah build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up six paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What revisions could Bob and Sarah make to increase the number of paper clips their electromagnet picks up
1). Wrap more turns of the wire around the nail.
2). Increase the electrical current through the wire. (Do this by inserting another battery in the circuit, in series with the first one.)
explain why the rate of diffusion of a gas decreases with decrease in temperature
Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusion decreases.
A sports car accelerates at 4.3 m/s2. If the car exerts a force of 4106 N, what is the mass of the sports car?
Answer:
954.88kg
Explanation:
F=ma
Given that,
F = 4106N
and a = 4.3m/s²
By rearranging the equation,
m = F÷a
m = 4106 ÷ 4.3
m = 954.88kg
An elevator is rising up a vertical shaft in a skyscraper. Between the 12th and 20th floors, it travels at a constant speed. During this time period:
1.) The only unbalanced force acting on it is air resistance.
2.) The forces acting on it are balanced so the net force is zero.
3.) The upward force is greater than the combined downward forces of gravity and air resistance, making it move upward.
4.) There are no forces acting on it so the net force is zero.
A car goes from 0 m/s to 13 m/s in 10 seconds. What is the
car's rate of acceleration?
Answer:
V initial = 0 m/s
V final = 13 m/s
Time = 10 s
Vf - Vi / T =
13-0/10 =
1.3 m/s^2
Explanation:
Hey<3
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 23pts-
Answer: wood
Explanation: pls help me https://brainly.com/question/22777864
If the model spacecraft were made ONLY out of plastic (no other materials) would it be repelled by the magnet launcher?
yes or no?
Answer:
no it wont i think
Explanation:
A mass weighing pounds is attached to a spring whose constant is lb/ft. The medium offers a damping force that is numerically equal to the instantaneous velocity. The mass is initially released from a point foot above the equilibrium position with a downward velocity of ft/s. Determine the time at which the mass passes through the equilibrium position. Find the time at which the mass attains its extreme displacement from the equilibrium position. What is the position of the mass at this instant
Answer:
hello your question has some missing values attached below is the complete question with the missing values
answer :
a) 0.083 secs
b) 0.33 secs
c) 3e^-4/3
Explanation:
Given that
g = 32 ft/s^2 , spring constant ( k ) = 2 Ib/ft
initial displacement = 1 ft above equilibrium
mass = weight / g = 4/32 = 1/8
damping force = instanteous velocity hence β = 1
a)Calculate the time at which the mass passes through the equilibrium position.
time mass passes through equilibrium = 1/12 seconds = 0.083
b) Calculate the time at which the mass attains its extreme displacement
time when mass attains extreme displacement = 1/3 seconds = 0.33 secs
c) What is the position of the mass at this instant
position = 3e^-4/3
attached below is the detailed solution to the given problem
Each gene controls the production of one or more specific ( Blank).
Answer:
Genes are located in the CHROMOSOME
Explanation:
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene.
Answer:
CHROMOSOME
Explanation:
a. It shows the relative distance of each planet from the sun
b. It shows the relative amount of sunlight each planet receives
c. It shows the relative size of each planet tone another
d. It shows the relative period of rotation for each planet
Answer:
C. It shows the relative size of each planet tone another
Explanation:
I took this quiz earlier. Hope you have a great day! :)
A tuba creates a 4th harmonic of frequency 116.5 Hz. What is the frequency of the third harmonic? (Speed of sound = 343 m/s) (Unit = Hz )
Answer:
3rd Harmonic Frequency created by tuba is equal to [tex]87.375[/tex] hertz
Explanation:
Given -
4th Harmonic frequency created by tuba is equal to [tex]116.5[/tex] hertz
1st Harmonic Frequency created by tuba is equal to [tex]\frac{116.5}{4}[/tex] hertz
3rd Harmonic Frequency created by tuba is equal to [tex]3* \frac{116.5}{4}[/tex] hertz
3rd Harmonic Frequency created by tuba is equal to [tex]87.375[/tex] hertz
Answer:
87.375 Acellus
Explanation:
Las ondas tienen elementos de posición y temporales uno de ellos se define como, La distancia recorrida por una onda en un período se llama Opciones: Longitud de onda Frecuencia Período Velocidad
Answer:
Velocidad.
Explanation:
Físicamente hablando, la velocidad es la distancia recorrida por unidad de tiempo. En el caso de las ondas se trata de la distancia recorrida en un período de tiempo.
Por ende, la opción correcta es: Velocidad.
Can someone please help me with science.
Answer:
The answers to your questions are given below
Explanation:
22. The energy of an electromagnetic wave and it's frequency are related by the following equation:
E = hf
Where:
E => is the energy
h => is the Planck's constant
f => is the frequency
From the equation i.e E = hf, we can conclude that the energy of a wave is directly proportional to it's frequency. This implies that an increase in the frequency of the wave will lead to an increase in the energy of the wave and also, a decrease in the frequency will lead to a decrease in the energy of the wave.
23. Gamma ray and radio wave are both electromagnetic waves. All electromagnetic waves has a constant speed of 3×10⁸ m/s in space.
Thus, gamma ray and radio wave have the same speed in space.
Find the tension in the two groups that are holding the 2.9 kg object in Pl., One makes an angle of 35.6° with respect to the vertical group 2 is pulling horizontally
Answer:
≈ 20.35 N [newton's of tension]
Explanation:
( (2.9 × 9.8) ÷ cos(35.6°) ) × sin (35.6°) =
( (28.42) ÷ (≈0.813) ) × (≈0.582) =
(≈34.96) × (≈0.582) = 20.3449446.... ≈ 20.35
Can someone please help me with science.
On the dog's return trip (between t = 10 and t = 12.5 seconds), the slope of the position function is steeper than during the first 5 seconds, which means the dog ran home faster. The only option that captures this is D.
You can check to make sure that the dog indeed runs twice as fast on the return trip. The slope of the position function during the first 5 seconds is
(change in position) / (change in time) = (5 - 0) / (5 - 0) = 5/5 = 1
while during the return trip, it is
(0 - 5) / (12.5 - 10) = -5/2.5 = -2
Ignoring the sign (which only indicates the direction in which the dog was running), we see that the dog's speed on the return trip was indeed twice as high as during the first 5 s.
help please :)))))))))))
Why would you have trouble breathing at high altitudes?
A. it is colder at the top of a mountain
B. the oxygen molecules are spread farther apart
C. the oxygen molecules are closer together
Answer:
A. It is colder at the top of a mountain
Explanation:
A 35 g block of ice is cooled to −83 ◦C. It is added to 565 g of water in an 87 g copper calorimeter at a temperature of 22◦C. Find the final temperature. The specific heat of copper is 387 J/kg · ◦C and of ice is 2090 J/kg · ◦C . The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg · ◦C . Answer in units of ◦C.
Answer:
Explanation:
Heat gained by ice in warming up to 0⁰C = .035 x 2090 x (83-0)= 6071.45 J
heat used up by ice to melt at 0⁰C = .035 x 3.33 x 10⁵ J = 11655 J
Heat used up in warming up water to t⁰C = .035 x 4186 x t = 146.51 t
heat released by warm water to cool from 22⁰C to t = .565 x 4186 x ( 22 - t )
=52032 -2365.1 t
heat released by copper calorimeter to cool from 22⁰C to t = .087 x 387 x ( 22 - t ) = 740.72 - 33.7 t
total heat released = 52032 -2365.1 t + 740.72 - 33.7 t
= 52772.72 - 2398.8 t
Heat lost = heat gained
52772.72 J- 2398.8 t = 6071.45 J + 11655 J + 146.51 t
2545.31 t = 35046.27
t = 13.8°C.
When acceleration and velocity are in opposing directions, the speed will
Answer:
If the velocity and acceleration are in the same direction (both have the same sign - both positive or both negative) the object is speeding up. If the velocity and acceleration are in opposite directions (they have opposite signs), the object is slowing down.
Please mark my answer brainliest for further answers :)How is our magnetic field made?
Answer:
REVENGE
Explanation:
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what is the amplitude and wavelength of the wave shown below?
Amplitude: 30 cm; wavelength 110cm.
Energy can come from electricity, but it
can also come from water
false
true
Answer:
the answer is truth
Explanation:
Answer:
I think it might be true...
What is the color of lava at its hottest? Help asap
EASY QUESTION IM GIVING BRAINLIEST!!
20 PTS
Maybe stainless steel :)
what are the uses of convex lens
Answer:A convex lens is employed in microscopes and magnifying glasses to converge all incoming light rays to a particular point. ...
The convex lens is used in cameras. ...
A convex lens is used for the correction of hyperopia. ...
The converging lens is used in the projector as well.
When steam turns a turbine, what is the energy conversion? *
1. Thermal to mechanical
2. Electrical to mechanical
3. Mechanical to chemical
(pls help)
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ir Q.No.la ताल भनका क
The unit of density is called derived unit, why?
Answer: Density is measured in kg⋅m−2 . This means that it is derived from fundamental units which are the kilogram and metre. ... hence the kilogram and the metre are SI units and density is a derived unit from these units
Explanation:
they are calculated from the base units mass and length. Density is one derived unit; force, area, volume, specific volume and mass fraction are also derived units. Each derived unit is defined by a quantity equation.
Answer:
Density is obtained through mathematical manipulation.
Explanation:
A derived unit is obtained through mathematical calculation and the result is written with the S.I unit kg/m³
Why did the lemon battery work and how many volts does one produce?
O The juice of the lemon is an acid and the acid caused 2 volts.
O The juice of the lemon is an electrolytic solution allowing electrons to flow and created around 5 V.
O The juice of the lemon is an electrolytic solution allowing electrons to flow and created around 1.5 V.
O The juice of the lemon is an acid and the acid caused 1 volt.
Answer:
the third one
Explanation: