7) Which statement below best describes the motion of the cart under the conditions shown in the image below?
Answers
Related Questions
How is MBC better than fuse wire
Answers
MCB is more sensitive to current than the fuse. It detects any abnormality in the current flow and automatically switches off the electrical circuit. In the case of MCB, the fault zone of the electrical circuit can be easily identified. ... But in case of the fuse, the entire fuse wire needs to be replaced.
volleyball falls on sand at timet 0 ms and quickly comes to rest. ... The Net Force On The Ball Over Time Is Shown Below Force (N) 3 2 T-> Time(ms ) 15 10 15 20 25 ... Note That Time Is In Ms. Kg M ..
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Answer:.05 kg*m over s
Explanation:did the work
difference between dry cell and simple cell
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Simple cells have liquid chemicals, making it harder for it to carry. While as dry cells have no liquid chemicals, making it easier to carry.
A force, 10 N drags a mass 10 kg on a horizontal table with an acceleration of 0.2
m/s2. If the acceleration due to gravity is 10 m/s2, the coefficient of friction between
the moving mass and the table is?
Answers
Answer:
20&£+)##&843&()-_££-()&_2+0&&-£_!)
A 20-kilogram object strikes the ground with 1960 J of kinetic energy after falling freely from rest. How far above the ground was the object when it was released? *
Answers
Answer:
h = 10 m
Explanation:
Given that,
Mass of an object, m = 20 kg
It strikes the ground with 1960 J of kinetic energy after falling freely from rest.
We need to find how far above the ground was the object when it was released. Let it is h.
The kinetic energy is converted to potential energy. It can be given by the relation as follows :
[tex]E=mgh\\\\h=\dfrac{E}{mg}\\\\h=\dfrac{1960}{20\times 9.8}\\\\h=10\ m[/tex]
So, it was at a height of 10 m when it was released.
How will the electrostatic force between two electric charges change if one charge is doubled and the second charge is tripled?
a. 1/6 times the original force
b. 6 times the original
c. 18 times the original
d. 1/36 of the original
Answers
Answer:
b. The force is 6 times the original
Explanation:
Coulomb's Law
The electrostatic force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between the two objects.
Written as a formula:
[tex]\displaystyle F=k\frac{q_1q_2}{d^2}[/tex]
Where:
[tex]k=9\cdot 10^9\ N.m^2/c^2[/tex]
q1, q2 = the objects' charge
d= The distance between the objects
Suppose one of the charges is doubled, i.e., q1=2q1 and the other charge is tripled (q2'=3q2). The new force F' would be:
[tex]\displaystyle F'=k\frac{(2q_1)(3q_2)}{d^2}[/tex]
Operating:
[tex]\displaystyle F'=k\frac{6q_1q_2}{d^2}[/tex]
[tex]\displaystyle F'=6\cdot k\frac{q_1q_2}{d^2}[/tex]
Substituting the original value of the force:
[tex]F'=6\cdot F[/tex]
b. The force is 6 times the original
The electrostatic force between two electric charges will change by 18 times the original force if one charge is doubled and the second charge is tripled. Option c. is correct .
Coulomb's law is a basic principle of electromagnetism that describes how the electric charge exerts force on other charges. The force between two charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. When one charge is doubled and the other is tripled, the force between the two will be 18 times the original force. The electrostatic force between two electric charges is directly proportional to the product of the charges.
Therefore, when one charge is doubled and the second charge is tripled, the electrostatic force will be 18 times the original. Thus, the correct option is c. 18 times the original force.
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Which types of light are absorbed by genetic material?
ultraviolet (UV)
visible
infrared (IR)
microwave F radio
Answers
Explanation:
the answerer is visible
Genetic material is known to absorb UV light. Given what we know, we can confirm that genetic material is not known to absorb light originating from an infrared or microwave radio source.
What light does genetic material absorb?Genetic material is the hereditary substance in the cell. It carries all information specific to an organism. It is known as DNA (deoxyribonucleic acid) or RNA (ribonucleic acid)
UV light is electromagnetic radiation, and the primary source of UV light that we are exposed to is the sun.
Therefore, given that the only form of light listed that genetic material is known to absorb is that of Ultraviolet or UV light, we can confirm that the answer to the question proposed is infrared and microwave radio light.
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Suppose the Pathfinder moves at a rate of 0.2m/s for 20 seconds and then turns around and travels at the same speed for 3 seconds, what is the Pathfinder's current position?
Answers
Answer:
PLEASE BE MORE SPECIFIC
Explanation:
The pathfinder is currently 3.4 m away from its initial position. Speed can be defined by the change in position of the object over time.
What is Speed?
It can be defined by the change in position of the object over time. The distance can be calculated by the formula,
[tex]d = s \times t[/tex]
Where,
[tex]d[/tex]- distance
[tex]s[/tex] - speed
[tex]t[/tex] - times -
Initially, Pathfinder moves,
[tex]d = 0.2 \times 20 \\\\d = 4 \rm \ m[/tex]
Then he turns back and moves,
[tex]d' = 0.2 \times 3 = 0.6 \rm m[/tex]
So the current position is:
[tex]D = d - d'\\\\D = 4 - 0.6 \\\\D = 3.4\rm m[/tex]
Therefore, the pathfinder is currently 3.4 m away from its initial position.
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Calculate the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.
Answers
Answer: The rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
Explanation:
The rate of energy transfer from one point to another is known as power.Its SI. unit is Watt.Formula to compute power:
Power = [tex]I^2 R[/tex], I = cureent, R = resistance.
Given R = 5 ohm , Current = 0.5 A.
Then, power = [tex](0.5)^2\times 5=0.25\times5=1.25\ watt[/tex]
Hence, the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.
What is accuracy
Classification of error
Answers
Answer:
The description of the frame of reference is characterized below.
Explanation:
Accuracy, as well as regression coefficients, seem to be the new standard measures besides summing up the validity of the developed modeling techniques. Classification accuracy unfortunately due to the presuppositions established by professionals on data sources with such an equitable classification process on supervised learning mostly with completely skewed category apportionmentobject height 10cm is placed in front of plane mirror.The height of the image will be_______?
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What is the Elastic potential energy of a car spring that has been stretched 0.5 meters? The spring constant for the car spring is 90 N/m.
Answers
Answer:
PE = 11.25 J
Explanation:
Elastic Potential Energy
It's the energy stored in an elastic material like a spring of constant k, in which case the energy is proportional to the square of the change of length Δx and the constant k.
[tex]\displaystyle PE = \frac{1}{2}k(\Delta x)^2[/tex]
The car spring has a constant of k=90 N/m and it stretches Δx=0.5 m. The elastic potential energy is:
[tex]\displaystyle PE = \frac{1}{2}\ 90(0.5)^2[/tex]
Calculating:
PE = 11.25 J
Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. The elastic potential energy of a car spring will be 11.25 J.
What is elastic potential energy?Elastic potential energy is the potential energy held when an elastic item is stretched or compressed by an external force. It is equal to the work done to extend the spring.
The given data in the problem is;
x is the distance by which spring got stretched = 0.5 m
k is the spring constant for the car = 90 N/m.
The formula for the elastic potential energy is;
[tex]\rm PE =\frac{1}{2} kx^{2} \\\\ \rm PE =\frac{1}{2} \times 90 (0.5)^{2} \\\\ \rm PE = 11.25\; J[/tex]
Hence the elastic potential energy of a car spring will be 11.25 J.
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How much force is required to accelerate a 14 kg mass at a rate of 2.5
m/s2?
Answers
Answer:
The answer is 35.
Explanation:
We use the formula F=ma
A child is playing with a toy car, and it accelerates
to the south from 1.2 m/s to 6.3 m/s. If the toy car's
acceleration is 2.75 m/s2, what is the amount of time
that the child takes to accelerate the car?
Answers
Answer:
1.86s
Explanation:
Given parameters:
Initial velocity = 1.2m/s
Final velocity = 6.3m/s
Acceleration = 2.75m/s²
Unknown:
Time it takes for the child to accelerate the car = ?
Solution:
Acceleration is the rate of change of velocity with time.
a = [tex]\frac{v - u}{t}[/tex]
a is the acceleration
v is the final velocity
u is the initial velocity
t is the time taken
2.75 = [tex]\frac{6.3 - 1.2}{t}[/tex]
5.1 = 2.75t
t = 1.86s
Which describes a condition of the neritic zone?
few organisms
ample sunlight
changing salinity
frigid temperatures
Answers
Answer:
ample sunlight
Explanation:
Neritic zone have ample of sunlight
What is Neritic zone ?The neritic zone is covered with generally well - oxygenated water , receives plenty of sunlight , have relatively stable temperature , has low water pressure and stable salinity levels .
Hence , correct option is option b) ample sunlight
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explain, in brief, the cause of an earthquake
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Answer:
An earthquake is caused by a sudden slip on a fault. ... When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel. In California there are two plates - the Pacific Plate and the North American Plate
Explanation:
just write it in ur own words
Weighing 15,000 N is parked on a 10 m2 hydraulic lift platform. What is the area of a small piston if a 1,100 N nozzle is used to lift the vehicle?
Answers
Answer:
[tex]A_2=0.74\ m^2[/tex]
Explanation:
Given that,
Weight, F₁ = 15,000 N
Area, A₁ = 10 m²
Weight, F₂ = 1100 N
We need to find the area of the small piston. The pressure exerted on both piston will be equal such that,
[tex]\dfrac{F_1}{A_1}=\dfrac{F_2}{A_2}\\\\A_2=\dfrac{F_2A_1}{F_1}\\\\A_2=\dfrac{1100\times 10}{15000}\\\\A_2=0.74\ m^2[/tex]
So, the area of the smaller piston is [tex]0.74\ m^2[/tex].
How many molecules are in 0.5 mol?
Answers
Answer:
1 mol of any compound (including of course CO2 and O2) contains 6.022*10^23 molecules
Therefore 0.5 mol of CO2 and O2 contains 3.01*10^23 molecules of each.
Convert 1 mm to meters using scientific notation. Include units in your answer.
Group of answer choices
100.0 x 10^-3 m
1.0 x 10^-3 m
10.0 x 10^-3 m
0.010 x 10^-3 m
Answers
Answer:
1.0 x 10^-3 m
Explanation:
1mm = (1/1000) m = 0.001m = 1.0 x 10^-3m (because to get 1.0, you have to movi the decimal point in the "0.001" three spots over to the right)
Need help asapppp
Thanks + BRAINLIST only if you know correct answer
1.Electromagnetic waves are
a. forms of matter
b. forms of space
C. longitudinal waves
d. transverse waves
2. A filter with vertical slits allows only waves that vibrate from side to side to pass
through
a.True
b. False
3.An electromagnetic wave is made up of vibrating an electric and magnetic fields.
a. True
b. False
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Answer:
1. d. transverse waves
2. False
3. True
1. D
2. B
3. A
How do grocery stores arrange their items?
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Answer:
How Are Grocery Store Aisles Organized? The aisles of a grocery store are organized into categories. ... Dairy aisles are along the back not connected to but close by the meat section. This will bring you back to the front of the other side of the store where the bread and bakery area is
Which phrase is the best description of a space probe?
A. An exploratory spacecraft that does not carry people
ООО
B. A rocket that has a very large amount of thrust
C. A telescope that allows you to see the Sun's surface
D. A spacecraft that can carry people to the Moon
Answers
Answer:
A is the answer
Explanation:
I ust did it on a p e x
Answer:
a
Explanation:
Got it right on A P E X
3. A 0.145 kg ball moving horizontally at 20 m/s is struck by a bat that causes the ball to move in the
opposite direction at 15 m/s. If the ball and bat were in contact for 5 ms, how much force did the bat
apply to the ball?
Answers
Answer:
F = 1015 N
Explanation:
Given that,
Mass of a ball, m = 0.145 kg
Initial speed, u = 20 m/s
Final speed, v = -15 m/s (as it moves in opposite direction)
The ball and bat were in contact for 5 ms
We need to find the force the bat applies to the bat. We know that,
F = ma
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{0.145\times (-15-20)}{5\times 10^{-3}}\\\\F=-1015\ N[/tex]
So, the bat will apply 1015 N force to the ball.
Is dependant variable what you measure?? yes or no
Answers
Answer:
YES
Explanation:
The dependent variable is the variable that is being measured or tested in an experiment. For example, in a study looking at how tutoring impacts test scores, the dependent variable would be the participants' test scores, since that is what is being measured
Answer:
You do measure a dependent variable
This is because we see evidence of plate movement in the fact that as we look at rocks farther and farther from the ridge, the rocks--
A)Have higher iron content
B)Are made up of smaller particles
C)Become thicker and thicker
D)Are consistently older
Answers
Answer:c
Explanation:
Answer:
C
Explanation:
1 point
A box weighing 12 Newtons is dragged across a
rough floor with a constant velocity of 1.4 meters
per second. The horizontal applied force pulling
the box is 8.5 Newtons. What is the magnitude of
the friction force the floor exerts on the box?
Your answer
PLEASE ANSWER
Answers
Answer:
The magnitude of the friction force that the floor exerts on the box is 8.5 newtons.
Explanation:
From Newton's Laws of Motion and given that box is moving at constant velocity, the net acceleration of the box is zero, meaning that magnitude of friction force is equal to the magnitude of the horizontal applied force. Please notice that friction force is the reaction to the horizontal force. The equation of equilibrium for the box is:
[tex]\Sigma F = F - f = 0[/tex] (1)
Where:
[tex]F[/tex] - Horizontal applied force, measured in newtons.
[tex]f[/tex] - Friction force, measured in newtons.
If we know that [tex]F = 8.5\,N[/tex], then the magnitud of the friction force that the floor exerts on the box is:
[tex]f = F[/tex]
[tex]f = 8.5\,N[/tex]
The magnitude of the friction force that the floor exerts on the box is 8.5 newtons.
A car magazine article claims that the new UltraCar 5000, only $10,000,000, can travel around a 50 m radius curve at 200 m/s.
What is the centripetal acceleration?
Does this seem to be possible?
Answers
Explanation:
it could be possible if the car has all the right aro dynamics
The crust, mantle, asthenosphere, and core are all parts of Earth’s
atmosphere.
biosphere.
hydrosphere.
geosphere
Answers
A relative asks your advice about a skin cream that reduces oxidation of
the lower skin layers and, thereby, reduces skin aging. Explain to her the
effectiveness of the skin cream based on that claim.
?
Answers
Answer:
Hmm
Explanation:
Answer:
Are antioxidant-rich skincare products as effective as they say they are? Best Health checked the science behind the claims.
Rusting iron and the browning flesh of an avocado both have something in common with the discoloration, wrinkles and fine lines of our aging skin: oxidation. Antioxidants counter this natural aging process, and that’s why they have been taking top billing in skin care.
Explanation:
Two students are playing catch with a 0.20 kg baseball. The first student throws the ball at 25 m/s. How much work is done by the second student in stopping the ball?
Answers
Answer:
W = 62.5 J
Explanation:
Given that,
Mass of a baseball, m = 0.2 kg
Initial speed of first student, u = 25 m/s
Finally, the ball stops, v = 0
We need to find the work done by the second student in stopping the ball. We know that, work done is equal to the change in kinetic energy. It can be given by :
[tex]W=\dfrac{1}{2}m(v^2-u^2)\\\\W=-\dfrac{1}{2}mu^2\\\\W=-\dfrac{1}{2}\times 0.2\times(25)^2\\\\W=-62.5\ J[/tex]
So, the required work done is 62.5 J.
