Answer:
45.864N
Explanation:
Using the formula
F = nR
n is the coefficient of friction
R is the normal reaction
R = mg
F = nmg
F = 0.78 * 6 * 9.8
F = 45.864N
Hence the amount of force with which the hand pushes the box is 45.864N
1:
This diagram shows four different dishes on the kitchen shelf.
tea cup
IN
2:
bowl
50 N
mug
10 N
plate
SON
3:
999
4
:
Which of these dishes has the least potential energy?
bowl
5:
plate
mug
6:
tea cup
Answer:
Bowl will have maximum potential energy
Explanation:
It is the bowl that will have maximum potential energy.
It is because potential energy is high when both height and mass of the object is high.
Here in this case the bowl has maximum weight with maximum height except the tea cup but the potential weight of cup will not make much impact as its weight is very low.
A boy weighs 50 kg and is running with 225 J of energy, what is his velocity?
choose the correct answer 14: which of the following force follows the inverse square law of distance A: gravitaional force B: electromagnetic force C: both (a) and (b) D: none of these
Answer:
C. both A and B
Explanation:
Sana nakatulong
The head scale of a screw gauge contains 100 divisions and it's pitch is 1mm. what is the least count of the screw gauge
Answer:
0.01 mm
Explanation:
The least count of the screw gauge = pitch/number of divisions on circular scale
Pitch = 1 mm and number of divisions = 100
Substituting the values of the variables into the equation, we have
least count of the screw gauge = pitch/number of divisions on circular scale = 1 mm/100 = 0.01 mm
Future space rockets might propel themselves by firing laser beams, rather than exhaust gases, out the back. The acceleration would be small, but it could continue for months or years in the vacuum of space. Consider a 1200 kg uncrewed space probe powered by a 15 MW laser. After one year, how far will it have traveled and how fast will it be going
Answer:
Acceleration = 0.0282 m/s^2
Distance = 13.98 * 10^12 m
Explanation:
we will apply the energy theorem
work done = ΔK.E ( change in Kinetic energy ) ---- ( 1 )
where :
work done = p * t
= 15 * 10^6 watts * ( 1 year ) = 473040000 * 10^6 J
( note : convert 1 year to seconds )
and ΔK.E = 1/2 mVf^2 given ; m = 1200 kg and initial V = 0
back to equation 1
473040000 * 10^6 = 1/2 mv^2
Vf^2 = 2(473040000 * 10^6 ) / 1200
∴ Vf = 887918.92 m/s
i) Determine how fast the rocket is ( acceleration of the rocket )
a = Vf / t
= 887918.92 / ( 1 year )
= 0.0282 m/s^2
ii) determine distance travelled by rocket
Vf^2 - Vi^2 = 2as
Vi = 0
hence ; Vf^2 = 2as
s ( distance ) = Vf^2 / ( 2a )
= ( 887918.92 )^2 / ( 2 * 0.0282 )
= 13.98 * 10^12 m
I will mark you brainlist!!
How is primary succession different from secondary succession? Give an example of an event that may lead to primary succession.
Answer:
Primary Succession is defined as the type of ecological succession, which occurs or start from the barren, uninhabited and unoccupied areas, such as the newly formed pond, rock, dunes, etc., while such kind of succession, which occurs in the area where there was the existence of life previously but got abandoned due to natural disturbances like deforestation, natural calamities (flood, earthquake, tsunami), the field with no vegetation is known as Secondary Succession
Explanation:
Some examples of primary succession include the formation of a new ecosystem after a volcano, glacier outbursts, or a nuclear explosion. Some examples of secondary succession include succession after fire, harvesting, logging, or abandonment of land or the renewal after a disease outbreak
i hope this answer helps :)
As amplitude of a wave increases, the
_____ of the wave also increases.
frequency
wave speed
wavelength
energy
i think so it is frequency
Which two criteria are least important for engineers to consider when developing a process to produce an important chemical?
A. The process should be located in a major city.
B. The process should use local, organic reactants.
C. The process should produce a significant amount of the product.
D. The process should be cost-effective.
Answer:
two least important criteria are A and B.
Explanation:
In an industrial production process there are criteria on the location of the production plants. Among the most important criteria we have that a good quantity is produced from the producer and that the process is cost-beneficial - cats to increase the profit of the company.
There are other desirable but minor criteria
A) The size of the city is of minor importance
b) Finding raw material locally is interesting, but its importance is less, the raw material can be sent from other locations.
Consequently the two least important criteria are A and B.
Answer:
A. The process should be located in a major city.
B. The process should use local, organic reactants.
Explanation:
ap.ex
mc2
Describe the process of nuclear fission and how the famous equation E
relates to this process.
frfyuegffffjhAnswer:
frjhgfjgresjytgfejygfjse
Explanation:
A 2.60 kg lion runs at a speed of 5.00 m/s until he sees his prey. The lion then speeds up 8.00 m/s to catch it. How much work did do after he speeds up?
Answer: 50.7 J
Explanation:
Given
mass of lion is [tex]m=2.6\ kg[/tex]
The initial speed of the lion is [tex]v_1=5\ m/s[/tex]
increased speed of lion is [tex]v_2=8\ m/s[/tex]
Initially, its kinetic energy is [tex]K_1=\frac{1}{2}mv_1^2[/tex]
Final kinetic energy [tex]k_2=\frac{1}{2}mv_2^2[/tex]
work did by lion after speed up is [tex]k_2-k_1[/tex]
[tex]\Rightarrow W=\dfrac{1}{2}\times 2.6[8^2-5^2]\\\\\Rightarrow W=1.3\times [39]=50.7\ J[/tex]
When measuring volume, your final
result must be in
A. linear units.
B. single units.
C. squared units.
D. cubed units.
Explain what happens to the path of light as it hits a piece of black paper, a glass mirror, and a glass
of water. Explain why the light behaves the way it does as it hits each object.
1. Light is _________ by the black paper.
2. Light is _________ by the mirror.
3. Light is _________ by the glass of water.
A 16 lb weight stretches a spring 6 inches in equilibrium. It is attached to a damping mechanism with constant c. Find all values of c such that the free vibration of the weight has infinitely many oscillations.
Answer:
[tex]-8<c<8[/tex]
Explanation:
Given data:
Weight W = 16 lb
length l = 6/12 = 0.5 ft
hence, spring constant k = W/l = 16/0.5 = 32 lb/ft
The equation of motion of spring is
[tex]mx''+cx+kx=0\\0.5x''+cx'+32x=0[/tex]
the auxiliary equation can be written as
[tex]0.5r^2+cr+32=0\\r^2+2cr+64=0[/tex]
The discriminate of equation is
[tex]D =(2c)^2+-4(1)(64)\\=4(c^2-64)[/tex]
To get the value of the damping constant,
[tex]D<0\\4(c^2-64)<0\\c>-8, c<8\\-8<c<8[/tex]
A constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110. Assuming the box starts from the rest, what is the final velocity vf of the box at 15.0 m point? If there were no friction between the box and the floor, what applied force Fnew would give the box the same final velocity?
We have that for the Question " constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110." it can be said that
the final velocity vf is
[tex]vf=3.83m/s[/tex]
and the applied force Fnew is
[tex]F_{new}=3.43N[/tex]
From the question we are told
A constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110. Assuming the box starts from the rest, what is the final velocity vf of the box at 15.0 m point? If there were no friction between the box and the floor, what applied force F new would give the box the same final velocity?
Generally the equation for the Force is mathematically given as
F_p-\mu mg=ma
Therefore
11-0.110*7*9.8=7*a
a=0.49m/s^2
Using Newtons equation
v^2=u^2+2as
v^2=0+2*0.49*15
v=3.83m/s
Therefore
F=ma
F=0.49*7
F_{new}=3.43N
Therefore
the final velocity vf is
[tex]vf=3.83m/s[/tex]
and the applied force Fnew is
[tex]F_{new}=3.43N[/tex]
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What does the transfer of energy have to do with natural disasters?
Answer: When an earthquake occurs energy is transferred, from where the rocks break, and travels throughout the world. The bigger the quake the further from the epicentre the waves will travel. There are four types of earthquake wave generated during an earth quake
Explanation:
The intensity of a natural disaster can be determined by the amount of energy transferred due to it.
What is meant by natural disaster ?Natural disasters include calamities with atmospheric, geological, and hydrological causes (such as droughts, earthquakes, floods, hurricanes, and landslides), which can result in fatalities, property damage, and social and environmental disturbance.
Here,
Internal and external forces work together to create natural disasters. The first is internal forces that are caused by the earth's internal heat energy and result in geologic hazards including earthquakes, volcanoes, and tsunamis.
Energy is transferred during an earthquake and propagates throughout the globe from the point at which the rocks split. The waves' distance from the epicenter increases with the size of the earthquake.
During an earthquake, four different kinds of seismic waves are produced. They transfer energy out of the earthquake's epicentre.
Hence,
The intensity of a natural disaster can be determined by the amount of energy transferred due to it.
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Consider the two-slit interference experiment. Electromagnetic radiation passes through the two slits that are a distance 0.0287 mm apart. The path to the fourth-order bright fringe on the nearby screen forms an angle with the horizontal. What is the wavelength of the light?
409 nm
164 nm
570 nm
655 nm
Explanation:
Consider the two-slit Interference experiment. Electromagnetic radiation passes through the two slits that are a distance 0.0287 mm apart. The path to the fourth-order bright fringe on the nearby screen forms an angle with the horizontal. What is the wavelength of the light? (1 point) O 655 nm O 570 nm O 164 nm O 409 nm
COMPANY
A car starts from rest and reaches a speed of 25m/s in 4 seconds. What is the acceleration?
Also, Calculate the distance the object traveled,
Can y’all help me with this one
Answer:
a = 6.25 m/s/s
d = 50 m
Explanation:
Given:
v1 (initial velocity)= 0 m/s (cz its at rest)
v2 (final velocity)= 25 m/s
t = 4s
a = ?
d = ?
to determine acceleration
a = (v2 - v1)/ t
= (25m/s - 0m/s)/4s
= 6.25 m/s/s
to determine distance traveled
d = 1/2(v1 + v2)t
=1/2(0m/s+25m/s)(4s)
=50 m
Answer:
Answer in explanation.
Explanation:
Using Equation
[tex]v = u + at[/tex]
where v is the final velocity
u is initial velocity
a is acceleration
t is time taken
given u = 0, v = 25, t = 4,
[tex]25 = 0 + 4a \\ 4a = 25 \\ a = 6.25 \frac{m}{ {s}^{2} } [/tex]
Now, using equation
[tex]v {}^{2} = {u}^{2} + 2as[/tex]
where v and u remains the same, a = 6.25 and s is the distance,
[tex](25) {}^{2} = \: {0}^{2} + 2(6.25)s \\ 12.5s = 625 \\ s = \frac{625}{12.5} \\ s = 50m[/tex]
Which of the following describes the relationship between the velocity and
pressure of a fluid?
A. Pascal's principle
B. Archimedes' principle
C. Bernoulli's principle
D. Flow rate equation
Answer is c
Explanation:
I think its a option pascal's principal
Answer:
c
Explanation:
Just took the quiz
Water flows through a garden hose which is attached to a nozzle. The water flows through hose with a speed of 1.81 m/s and through the nozzle with a speed of 18.3 m/s. Calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed. (a) Emerges from the nozzle. m (b) Emerges with the nozzle removed, assuming the same flow rate. m
Answer:
a) 17.086m
b) 0.1671 m
Explanation:
Given data: speed of water through the hose = 1.81 m/s
through the nozzle = 18.3 m/s
We know that maximum height of an object with upward velocity v is given by,
a) H = v^2/2g
where H is the maximum height water emerges
= 18.3^2/(2×9.8) = 17.086 m answer
b) Again,
H = v^2/2g
= 1.81^2/(2×9.8) = 0.1671 m
a stone on the ground has zero energy why
Explanation:
it has no energy when considered with respect to earth ,as it has neither height (i e potential energy) nor velocity (i.e kinetic energy).
What would be the mass of an atom with 2 protons and 3 neutrons?
Answer:
5
Explanation:
From the question given above, the following data were obtained:
Proton number = 2
Neutron number = 3
Mass number =.?
The mass number of a given atom is simply the sum of the protons and neutrons in the nucleus of the atom. Mathematically, it is expressed as:
Mass number = proton + neutron
With the above formula, we can obtain the mass number of the atom as follow:
Proton number = 2
Neutron number = 3
Mass number =.?
Mass number = proton + neutron
Mass number = 2 + 3
Mass number = 5
Thus, the mass number the atom is 5.
The statement "if I raise the temperature of
a cup of water, then an increased amount of
sugar will be dissolved" is an example of
A. an observation
B. a hypothesis.
C. a theory
If a wave is traveling at 60 cm/second and has a wavelength of 15 cm, what is the frequency?
A. 900 Hz
B. 60 Hz
C. 8 Hz
D. 4 Hz
Answer: B
G v = 60 cm/s λ = 15 cm E f = V / λ S f = 4 Hz U f = ? S f = (60 cm/s) / 15 cm 5.
Explanation:
According to Newton’s second law of motion, weight depends on an object’s mass and the net force acting on the object. True or false
Answer:
true..
Explanation:
Newton's 2nd law of motion is greater the mass of an object the more force it will take to accelerate the object
According to Newton’s second law of motion, weight depends on an object’s mass and the net force acting on the object. The given statement is true.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
The following equation help to understand the statement;
Force is defined as the product of mass and acceleration. Its unit is Newton.
F=ma
F=mg
W=mg
The weight of an item is determined by its mass and the net force exerted on it, according to Newton's second rule of motion. The provided assertion is correct.
Hence,the given statement is true.
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A small car is traveling at a speed of 60 mph on the highway. In the next lane, a large passenger bus is traveling at the same speed.
Answer:
A. The bus has more kinetic energy than the car.
Explanation:
As we know that
Kinetic energy is the amount of energy possessed by the body at the time when it is in motion.
Also,
Kinetic energy = 1 ÷ 2mv²
Here m denotes the mass of the body
and v denotes the velocity of the body.
So it would be based on the mass & velocity of the body
As if the passenger bus contains more kinetic energy as compared to the car because of the big mass
Hence, the first option is correct
An unknoAn unknown additional charge q3 is now placed at point B, located at coordinates (0 m, 15.0 m ). Find the magnitude and sign of q3 needed to make the total electric field at point A equal to zero.wn additional charge q3 is now placed at point B, located at coordinates (0 m, 15.0 m ). Find the magnitude and sign of q3 needed to make the total electric field at point A equal to zero.\
Answer:
hello your question has some missing information attached below is the missing information
answer : q3 = 0.300 nC
Explanation:
Given that Eay is in the Y axis ( upward ) , E3 will be downward and this will make the sign on the the charge ( q3 ) to be positive
E3 = Eay. ( for an electric field to be neutral/zero the electric field in the opposite direction will have same magnitude )
To calculate the value of q3 we will apply the relation below
K*q3/( 15 - 12 )^2 = 0.300
= (9 * 10^9) * (q3 / 9 ) = 0.300
∴ q3 = 0.300 / 10^9
= 0.300 nC
Note : The value of Eay is been calculated outside this solution as it is not part of the question asked
A washer is swung in a circle on a string as shown below. If the string
breaks which arrow shows the path the washer will take? *
Answer:
yabarrow
Explanation:
i think thats the name
is warming up important before doing an intense exercise or work-out? Wh?
Answer:
Yes, warming up is necessary before intense exercise, work-out or sports because they help regulate temperatures of your body. Warming up also makes your muscles ready for intense physical activities and prevents muscle cramps.
Explanation:
do you think you will benefit from the discoveries of Archimedes’ and Pascal’s Principles?
Answer:
I hate to say it is a bit of the holiday but
9.
A 2.85-cm diameter coin is placed a distance of 31.4 cm from a diverging lens that has a focal length
of-11.6 cm. Determine the image distance and the diameter of the image.
Answer:
image distance = -8.47 cm
diameter of the image = 0.769 cm