A net force of 500 N acts on a 100 kg cart. a. What is the acceleration?
A car is traveling on a level road at a constant rate of speed. What additional force is necessary to bring the car into equilibrium? zero. greater than the normal force times the coefficient of static friction. the normal force times the coefficient of kinetic friction. equal to the normal force times the coefficient of static friction.
Answer: Zero.
Explanation:
By the first Newton's law, we know that:
every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
Now, we know that the car is moving with constant speed, then there is no net force acting on the car, which means that the car is already in equilibrium.
Then if we add one force to the situation, the car will not be anymore in equilibrium.
The correct option is zero.
A plane is traveling North at 80km/hr into a 20 km/hr headwind (South). What is the plane's resultant velocity?
Answer:
Consider our plane flying at a speed of 80 km/hr into a 40 km/hr crosswind. Its speed, relative to the ground, can be calculated by adding the two vectors as shown on the right. What happens to the speed of the plane as the crosswind increases in magnitude? Look at the animation on the right. It is obvious that the speed of the plane, relative to the ground, increases in magnitude.
Explanation:
Answer:
60km/hr
Explanation:
R=80 - 20
=60km/hr, north
Your friend is trying to figure out which flap configuration makes a paper airplane fly the farthest. Which of the following is the independent variable?
Answer:
answer choices?
Explanation:
125.5 micrograms = ____ kilograms
A 2.50-mL sample of ammonia gas (NH3) is heated from 325 kelvin to 425 kelvin. What is the new volume of the sample?
Answer:
The new volume of the [tex] NH_{3}[/tex] sample is 3.27mL.
Explanation:
Given the following data;
Original Volume, V1 = 2.50-mL
Original Temperature, T1 = 325K
New Temperature, T2 = 425K
To find new volume V2, we would use Charles' law.
Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Charles is given by;
[tex] VT = K[/tex]
[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]
Making V2 as the subject formula, we have;
[tex] V_{2}= \frac{V1}{T1} * T_{2}[/tex]
[tex] V_{2}= \frac{2.50}{325} * 425[/tex]
[tex] V_{2}= 0.0077 * 425[/tex]
V2 = 3.27mL
Therefore, new volume of the [tex] NH_{3}[/tex] sample is 3.27mL.
What is the acceleration of the object in this graph?
Answer: 6 and 0.75
Explanation:
because you look how far up it goes and just use the graph
A train is resting on a track when another train with several more cars bumps it and causes it to move forward 10 meters. This is an example of acceleration because:
Answer:
The answer is below
Explanation:
Acceleration is the rate of change of velocity with respect to time. The S.I unit of acceleration is m/s².
We say that there is acceleration if there is a change of distance or change in velocity (increase or decrease) or both.
The statement above is an example of acceleration because there is a change in velocity. The velocity when the motor was at rest was 0, but an increase in acceleration caused the train to move a distance of 10 meters.
hello what is quantum physics
Answer:
It is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles.
A materials density is the same , no matter how large or small the sample is or what it’s shape is as long as it is solid uniform piece of the material explain how this is possible and give an example
Answer:
See the explanation below
Explanation:
Density is defined as the relationship between mass and volume, i.e. the following equation can be used:
density = m/v
where:
density [kg/m^3]
m = mass [kg]
v = volume [m^3]
If we change the volume of a body by reducing its size, its mass will also decrease proportionally with a density as seen in the equation.
m = density*v
To understand this concept more clearly, let's use the following example:
We know that the density of water is equal to 1000 [kg/m^3], that is, 1 cubic meter of water contains 1000 kilograms of water, using the equation.
1000 = m /1
m = 1000*1 = 1000 [kg]
Now if we have 500 kilograms of water, that would pass with the volume so that the density remains constant.
1000 = 500/v
v = 500/1000
v = 0.5 [m^3]
We can see that the volume of water has halved. Since the mass of water was reduced by half. That is, the relationship between mass and volume is proportional to the density of the material or substance.
is an object on the surface of earth sitting still relative to outer space?
Answer:
Nothing anywhere is sitting still. As all is moving.
1.
What is a force? What changes can be produced by a force?(AS)
Answer:
the pull or push which changes or tends to change the position of an object from rest to motion or motion to rest is called force.
Changes of force that can be produced:
Force can change the shape of a body.Force can change the position of a body.Force can stop the moving body.Force can change the speed of a moving body.Force can change the direction of a moving body.Question 3 of 5
Which object absorbs the most sound waves?
A. Earplugs
B. Tissue paper
C. Water
D. Air
Answer:
The correct option is B.
Tissue paper
Explanation:
Tissue paper absorb most sound waves because it is porous. Materials that absorb sound most are highly porous like tissue because that have pores and allow sound to penetrate through it channels or cavities which makes it to loss part or all of it energy. This material allow sound wave to enter through it.
Sound energy is distributed as a result of heat loss which is caused by the air molecules of the pores wall in the material.
Answer:
Option A: Earplugs is your answer.
Explanation:
Merry Christmas
Pete rides his horse 64 km in 4 hours.
What is his average speed in kilometers
per hour?
Given:
D=64 km
T=4 hour
Answer:
His average speed is
[tex] \frac{64km}{4h} = {16kmh}^{ - 1} [/tex]
An 18.0 N force pulls a cart against a 15.0 N frictional force. The speed
of the cart increases 1.0 m/s every 5.0 s. What is the cart's mass?
Someone please help me on this I only have a few minutes
Answer:
m = 15 kg
Explanation:
Applied force to the cart, F' = 18 N
Force of friction, f = 15 N
Net force acting on the cart,
F = F' - f
F = 18 - 15
F = 3 N
The change in velocity of the cart is 1 m/s every 5 s.
We need to find the mass of the cart.
The formula of net force is given by :
F = ma, where a is the acceleration of the cart
[tex]F=\dfrac{m\Delta v}{t}\\\\m=\dfrac{Ft}{\Delta v}\\\\m=\dfrac{3\times 5}{1}\\\\m=15\ kg[/tex]
So, the cart's mass is 15 kg.
I NEED HELP!! PLEASE ANSWER WITHIN 30MIN.. THANK YOU
Another way to represent a substance is with a picture. What information does the picture provide about carbon dioxide?
Answer:
The picture gives information about how many kinds of atoms are in carbon dioxide and how they are connected.
Explanation:
This was the answer to my test on Plato. I hope this helps :)
Answer:
The picture gives information about how many kinds of atoms are in carbon dioxide and how they are connected.
Explanation:
What is the pressure exerted by a column of water 80 cm high ?
Answer:
[tex]P=7,840\ Pa[/tex]
Explanation:
Pressure Exerted by a Column of Liquid
The pressure P exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation:
P = ρgh
Where ρ is the density of the liquid, g is the acceleration of gravity g=9.8m/s^2, and h is the height of the column of liquid.
The data provided is as follows:
[tex]\rho=1000\ Kg/m^3[/tex]
[tex]g=9.8m/s^2[/tex]
[tex]h=80\ cm = 0.8\ m[/tex]
The pressure is:
[tex]P = 1000\ Kg/m^3\cdot 9.8\ m/s^2 \cdot 0.8\ m[/tex]
[tex]\boxed{P=7,840\ Pa}[/tex]
12. The resistivity of a given wire of cross-sectional
area 0.7mm 4.9 x 10raised to the power of -4ohm mm. Calculate the
resistance of a 2ohm length of the wire
R = resistivity × (l/A), A = πr^2= πd^2/4
2 =( 4.9 × 10^ -4) * (l/π0.7^2/4)
make l the subject and calculate.
i assumed we are looking for the length if the wire.
A wave traveling at 100 m/s has a frequency of 200Hz. What is the wavelength of this wave?
Saturn is 1,200,000,000 kilometers from earth. What is the distance in standard form using meters?
Answer:
That would be 1,200,000,000,000Explanation:
Hope this helpsexplain the types of motion
Answer:
there are three type of notion
At 1:00 p.m. a car, traveling at a constant
velocity of 82 km/h toward the west, is 24 km
to the west of our school.
How far from the school will it be at 3:30
p.m.?
Answer in units of km.
.....
The distance from the school will be 229 Km
What is Velocity ?Velocity is the distance travel in a specific direction per time taken. Velocity is a vector quantity.
Given that at 1:00 p.m. a car, traveling at a constant velocity of 82 km/h toward the west, is 24 km to the west of our school. How far from the school will it be at 3:30 pm ?
The time taken by the car will be = 3:30 - 1:00 = 2:30 = 2.5 hr
Since the speed is constant, V = s/t
82 = s / 2.5
s = 82 x 2.5
s = 205 Km
The distance from the school = 24 + 205 = 229 Km
Therefore, the distance from the school will be 229 Km
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From the moment a 40 m/s fastball touches the catcher’s mitt until it is completely stopped takes 0.012 s. Calculate the average acceleration of the ball as it is being caught.
Answer:
3333.33 m/s²
Explanation:
From the question given above, the following data were obtained:
Total Velocity (v) = 40 m/s
Total Time (t) = 0.012 s.
Average acceleration (a) =..?
Average acceleration can be defined as follow:
Average acceleration (a) = Total velocity (v) / total time (t)
a = v / t
With the above formula, we can obtain the average acceleration of the ball as shown below:
Total Velocity (v) = 40 m/s
Total Time (t) = 0.012 s.
Average acceleration (a) =..?
a = v / t
a = 40 / 0.012
a = 3333.33 m/s²
Therefore, the average acceleration of the ball is 3333.33 m/s².
(BRAINLIEST AND 13 POINTS) Which two variables have an effect on the momentum of an object?
a. mass and position b. mass and velocity c. position and velocity
Answer:
B mass and velocity......................
A driver in a car is driving 65 m/s when she sees a
police car. Over 10 seconds, the driver slows down
to a velocity of 22 m/s to avoid getting a ticket.
What is the deceleration of the car over that 10
seconds? (Include units in your answer.)
Answer:
43 m\s in the 10 seconds?
Explanation:
Convert 400.0 nm to mm.
Answer: 0.0004
Explanation: hope this helpsss ^-^
What allows a pump to raise fluids in pipes
Answer: The energy to move the fluid is provided by the pressure on the fluid surface.
Explanation: The frictional losses in the suction pipework and rises in the suction pipework system will reduce the fluid pressure at the pump inlet. If the pump inlet connection is removed the fluid will not flow out of the suction pipework. Hope this helps! :)
How can the force of gravity affect weight?
Answer:
If you go to a planet with little gravity you will be lighter and the stronger gravity is the heavier you are. The mass of any object that is experiencing different gravity forces will stay the same the only thing that will change is the weight.
The force of gravity affects weight by exerting a downward force on objects near the Earth's surface. Weight is the measure of the gravitational force acting on an object. The force of gravity is directly proportional to the mass of an object.
How does gravity affects weight?According to Newton's law of universal gravitation, the force of gravity between two objects is determined by their masses and the distance between them. Near the surface of the Earth, the force of gravity can be approximated using the equation:
F = mg
Where:
F is the force of gravity
m is the mass of the object
g is the acceleration due to gravity (approximately 9.8 meters per second squared on the surface of the Earth)
As you can see from the equation, weight (force of gravity) is directly proportional to the mass of an object. This means that as the mass of an object increases, its weight increases as well. For example, a heavier object will experience a greater force of gravity and, therefore, have a greater weight compared to a lighter object.
It's important to note that weight is a force, typically measured in units such as newtons or pounds, whereas mass is a measure of the amount of matter in an object, typically measured in kilograms or pounds. Weight can vary depending on the strength of the gravitational field, whereas mass remains constant regardless of the location. For example, an object that weighs 100 pounds on Earth would weigh less on the Moon due to the Moon's weaker gravitational pull. However, the mass of the object would remain the same.
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if an object left earth which direction would it travel
Answer:
In a straight line
Explanation:
Why, because of the power of inerta
Giselle leaves the ground at an angle of 25° above the horizontal at a velocity of 5.5 m/s to leap over the fence.
Round all answers to the nearest hundredth.
a) What is the horizontal component of the gazelle’s velocity?
b) What is the vertical component of the gazelle’s velocity?
c) How much later did the Gisele hit the ground?
d) What is her maximum height?
e) How far did she leap?
Answer:
a) 5.01 m/s
b) 3.28 m/s
c) 0.67 s
d) 0.45 m
e) 2.78 m
Explanation:
Answer:
a) 3.04 m/s
b) 3.7 m/s
c) 0.72 s
d) 0.36 m
e) 4.12 m
Explanation: