Answer:
1. 310 N
2. 310 N
Explanation:
1. Determination of the net force.
Force applied (Fₐ) = 430 N
Force experience (Fₑ) = 120 N
Net force (Fₙ) =?
Fₙ = Fₐ – Fₑ
Fₙ = 430 – 120
Fₙ = 310 N
Hence, the net force acting on the crate is 310 N
2. Determination of the net force.
Force applied (Fₐ) = 375 N
Force of friction (Fբ) = 65 N
Net force (Fₙ) =?
Fₙ = Fₐ – Fբ
Fₙ = 375 – 65
Fₙ = 310 N
Hence, the net force acting on the crate is 310 N.
7. What force is required to accelerate a 100 kg car to 4 m/s27 F=ma
O A. 25N
B. 104N
C. 400N
Answer:
is the formula is F=MA so
F=100kg×4m/s=400n
so the answer is 400n
Why do scientists use models? A.To collect and record data through the scientific method B.To explain difficult concepts and show how things work C.To make conclusions based on experiments D. To observe small objects and make them look larger
Answer:
The most correct option here is B
Explanation:
Models are usually used in science in order to proffer or explain difficult concepts of the real/actual "subject". The model to be used must have some level of similarity (usually high) with the actual subject. The use of model helps to explain how certain things work in the actual subject. Actual subjects are sometimes eventually used later after convincing experiments (showing "positive" results) must have been done on the model.
From the explanation above, it can be deduced that the correct option is B
A man does 40,000 J of work in 20 seconds. How much power does he exert?
Explanation:
Since P=W/t
P= 40000/20
P= 2000 Watt(or)Joule per sec
two points A=(+16) and B=(-4) At electric potential respectively find:
a)which points is at higher potential?
b)what is the pontial difference b/w the two points?
c)the work done in moving acharge of 5C from A to B?
Answer:
a. Point A
b. 20 V
c. 100 J
Explanation:
a. Point A is at a higher potential because there is a positive sign in front of its magnitude. Since it is a positive integral value, and has a higher magnitude than point B which is at -4, point A is thus at a higher potential than point B.
b. The potential difference between the two points ΔV = A - B
= +16 V - (-4 V)
= +16 V + 4 V
= + 20 V
c. The work done, W in moving a charge Q across a potential difference ΔV is W = QΔV
So, since Q = 5 C and ΔV = + 20 V
W = QΔV
= 5 C × (+ 20 V)
= 100 J
A scientist heats an unknown substance in a closed system. The graph shows the change in temperature over time.
Answer:
C
Explanation:
When a substance is changing state, the heat supplied does not result in a rise in temperature. This is why, the heat supplied during change of state is referred to as 'latent heat'.
Latent heat is a heat that causes a change of state without a corresponding rise in temperature. During this time, the intermolecular bonds in the substance are broken.
Change of state will occur as regions in which there is no change in temperature with time such as point D on the graph.
Answer:
C
Explanation:
for me at least it was
Do this work if someone give correct answer I make her brainliest do this worksheet please
Answer:
a. Any one way then I can say that Aluminum sulfide has mass per mole of ≈150.2g while aluminum has mass per mole of 26.9g
b. Sulfur is an element but aluminum sulfide is a compound
c.Beryllium and chlorine
d. BeCl2
e.i. Metals form ions by losing electrons but nonmetals form ions by gaining electrons
ii.A metal can react with an acid to produce a salt a nonmetal doesnt
iii. A metal forms ionic compounds whilst nonmetals form covalent compounds
How long will it take a fired shell from a cliff at an initial velocity of 800m/s at an angle 30 degree below the horizontal to reach the ground 150m below
Answer:
0.373 seconds. First, calculate the initial vertical velocity of the shell. 800sin(30) = 800*0.5 = 400 m/s Now the formula for the distance traveled is d = 400 m/s * T + 0.5A T^2 Substituting known values gives.
Explanation:
PLZ MARK ME BRAINLIST GUYSPLZ FOLLOW ME GUYSAn earthquake sends a seismic wave through the ground. What is the
medium? ANSWER QUICK!
Answer:
THE GROUND IS THE MEDIUM OF SEISMIC WAVES
please help me on the 1st bullet point for brainliest!
Answer:
thermal energy
Explanation:
can i get a little bit idea about Quantum physics
Answer:
What is quantum physics? Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.
What is the mass of an object which has a force of 600 N acting on it and is travelling
with an acceleration of 15 m/s2?
Answer:
The mass of the object is 40 Kg
Explanation:
Net Force
According to the second Newton's law, the net force exerted by an external agent on an object is:
F = m.a
Where:
a = acceleration of the object.
m = mass of the object.
The mass can be calculated by solving for m:
[tex]\displaystyle m=\frac{F}{a}[/tex]
The object has a net force of F=600 N acting on it and travels at [tex]a=15\ m/s^2[/tex], thus the mas is:
[tex]\displaystyle m=\frac{600}{15}[/tex]
m = 40 Kg
The mass of the object is 40 Kg
here's the cbse syllabus for magnetic effects of electric current
Explanation:
thx bro......... ...........
What is the energy transformation of these street lights with solar panels?
The lunch lady pushes a 100 kg zombie with 300 N of force. How much is the zombie accelerated
F = m × a
300N = 100kg × a
a = 300 : 100
a = 3ms-²
A bit of explanation :F = Force (N)
m = mass (kg)
a = acceleration (ms-², m/s²)
calculate the pressure in SI unit when a thrust of 75kg acts on an area of 0.5m²
Answer:
Pressure will be: 1470 Pa
Explanation:
Given
m = 75kgA = 0.5m²We know that
Pressure = Force / Area
Force = mg = (75kg) (9.81 m/s²) = 735 N
Thus,
Pressure = Force / Area
= 735 / 0.5
= 1470 Pa ∵N/m² = Pa
Thus,
Pressure will be: 1470 Pa
help with this question.......
Answer:
its a liquid
Explanation:
liquid means water water means liqiud without them we cannot survive we need to be healthy we should bath we should drink more amount of water
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Please help me on this!!
Give three examples of how a cell's shape makes possible the cell's function
WILL GIVE BRAINLIEST
Can a body moving in circular path have constant velocity? Explain.
Answer:
constant velocity means that both the speed and direction do not change . An object moving in a circular path with constant speed does not have a constant velocity because the direction of the velocity is constantly changing. This implies that an object moving at a constant speed in a circular path is accelerating
In object moving with a speed of 21M/S and has a kinetic energy of 140j, what is thr mass of the object
How far does a car travel in 30.0 s while its velocity is changing from 50.0 km/h to 80.0 km/h at a uniform rate of acceleration?
Answer:
f
Explanation:
What is the mass of 52N shopping bag?
5.3 kg
5.3 N
509 kg
509 N
Weight = mass × acceleration due to gravity, so
52 N = m (9.8 m/s²)
m = (52 N) / (9.8 m/s²) ≈ 5.3 kg
A container of gas is held at a constant volume. Which will most likely happen to the temperature if the pressure of the gas increases?
The temperature will increase at the same rate as the pressure increases.
The temperature will decrease at the same rate as the pressure increases.
The temperature will increase at half the same rate as the increase in pressure.
The temperature will decrease at half the same rate as the increase in pressure.
Answer:
With more particles there will be more collisions and so a greater pressure. The number of particles is proportional to pressure, if the volume of the container and the temperature remain constant. ... This happens when the temperature is increased.
Explanation:
Assuming the gas to be an ideal gas, the temperature will increase at the same rate as the pressure increases.
Ideal gas:Let us assume that the gas in the container is an ideal gas. Then from the ideal gas equation, we get that:
PV = nRT
where P is the pressure of the gas
V is the volume
T is the temperature
n is the number of moles of the gas
R is the universal gas constant
Now, it is given that V is constant, R is already a constant, and n will also be constant, since the number of moles of gas in the container is not changing, so:
P = nRT/V
P = constant × T
P/T = constant
This means that the temperature will increase at the same rate as the pressure increases.
Learn more about ideal gas:
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What statement about the milky way is true?
Answer:
D) it is one of many galaxies
Explanation:
the milky-way galaxy is just one of billions of galaxies, which span billions and billions of light-years across the universe!!!
Answer:
D it is one of many
Explanation:
The initial temperature of 150 g of ethanol was 22 C. What will be the final temperature of the ethanol if 3240 J was needed to raise the temperature of the ethanol
Answer:
30.405°CExplanation:
Using the formula for heart capacity;
Q = mcΔt
m is the mass = 150g = 0.15kg
initial temperature = 22°C
Quantity of heat = 3240J = 3.24kJ
specific heat capacity of ethanol = 2.57 [kJ/kg K]
Substitute and get the final temperature
3.240 = 0.15(2.57)(T - 22)
3.240 = 0.3855(T-22)
3.240/0.3855 = T - 22
8.405 = T - 22
T = 22+8.405
T = 30.405°C
Hence the final temperature of the ethanol if 3240 J was needed to raise the temperature of the ethanol is 30.405°C
The magnitude of the resultant of two vectors of magnitude 3 units and 4 units is 5 units. What is the angle between two vectors?
Explanation:
Using Cosine rule, we have 5² = 3² + 4² - 2(3)(4)(cosx).
=> cosx = 0, x = 90°.
A 45 kg wagon is being pulled with a rope that makes an angle of 38 degrees with the horizontal. The applied force is 410 N and the coefficient of kinetic friction between the wagon and the ground is 0.18.
Answer:
7.35m/s²
Explanation:
From the question we are not told what to find but we can as well find the acceleration of the wagon.
According to newton second law of motion
[tex]\sum F_x = ma_x\\Fm - Ff = ma_x\\Fm - \mu R = ma_x\\Fm- \mu mg = ma_x\\[/tex]
Fm is the moving force = 410N
[tex]\mu[/tex] is the coefficient of friction = 0.18
m is the mass = 45kg
g is the acceleration dur to gravity = 9.8m/s²
a is the acceleration of the wagon
Substitute the given data into the equation ang get ax
[tex]Fm- \mu mg = ma_x\\410 - (0.18)(9.8)(45) = 45a_x\\410 - 79.38 = 45a_x\\330.62 = 45a_x\\a_x = 330.62/45\\a_x = 7.35m/s^2\\[/tex]
Hence the acceleration of the wagon is 7.35m/s²
Differentiate between
Length and Time
Answer:
Concept: Physical Constants
Length is a measure of distance Time is a measure of concept of space.The difference between Length and Time is: Length is a measure of distance while Time is a quantity or measure of period.
Meaning of Length and TimeLength can defined as a fundamental quantity that describe the total space occupied by an object from end to end or the distance of an object from end to end.
Time can be defined the duration of an occurrence in space. Time is so important as it helps us adequately know the period of an event or occurrence.
In conclusion, The difference between Length and Time is: Length is a measure of distance while Time is a quantity or measure of period.
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Jimmy runs a chain of souvenir shops in South Florida. He imports T-shirts and other apparel from Guatemala to sell in his stores. One day, student protesters damage several of his stores, demanding that he pay his workers in Guatemala a fair wage. Jimmy estimates the damage at $5,500. He sues the protestors for the damage they cause. Where is the original jurisdiction of this case?
Answer he would go to court veto bill
Explanation
that how it works