If we want to find the size of the force necessary to just barely overcome static friction (in which case fs=μsNfs=μsN), we use the condition that the sum of the forces in both directions must be 0. Using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as:

Explanation:

Given that,

Mass of a puck, m = 8 kg

Initial velocity, u = 10i m/s

Final velocity, v = (10i+12j) m/s

Time, t = 8 s

(a) Force acting on an object is given by the product of mass and acceleration.

F = ma

a is acceleration

[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{8\times (10i+12j-10i)}{8}\\\\F=12j\ \text{N}[/tex]

(b) The magnitude of force is given by :

[tex]F=\sqrt{12^2+0^2} \\\\F=12\ N[/tex]

Hence, the component of force is 12j N and its magnitude is 12 N.

Answer:

18.8m

Explanation:

This implies calculating the relative speed first then find the distance d

So

relative speed = 2.75- 1.25 = 1.5 m/s

So assume the distance between them to be say d

so, d/1.5= 12.5

d = 18.8m

Answer:

Yes.

Explanation:

If a star is moving away from earth, it's color will shift to in the visible spectrum will turn to Red.

Explanation:

(a)

F = (GM1M2)/r²

F = (6.7 X 10^-11 x 30.3 x 40.17)/0.5²

F = 326.197 x 10^-⁹N

(b)

F =750N

G = 6.7 x 10^-11

M1 = 2050kg

r = 70.3m

M2 = ?

F = (GM1M2)/r²

F x r² = GM1M2

(F x r²)/GM1 = M2

M2 = (750 x 70.3²)/(6.7 x 10^-11 x 2050)

M2 = 26.99kg

Answer:

152.

Explanation:

2 x 76 = 152

bruh its not that hard

Answer:

152 m

Explanation:

Distance = Speed x Time

[tex]2 \times 76 \\ 152[/tex]

Thus the distance is equal to 152 m.

Answer:Newton’s law also states that larger bodies with heavier masses exert more gravitational pull, which is why those who walked on the much smaller moon experienced a sense of weightlessness, as it had a smaller gravitational pull. To help explain his theories of gravity and motion, Newton helped create a new, specialized form of mathematics.

Explanation: I think I'm very stupid

Answer:

The concentrations of the reactants and the products. The temperature of the system. The partial pressures of the gases involved (if any)

Explanation:

Answer:

988.39 N/C

Explanation:

First, we start by finding the magnitude of the electric dipole moment, as it's going to be needed

p = 4.40*10^-9 * 3.10*10^-3

p = 1.364*10^-11 Cm

The charges are in a uniform electric field E whose direction makes an angle of 36.4° with the line connecting the charges.

Magnitude of torque exerted on the dipole,

t = 8.0×10−9 N.m

pEsinO = t, making E subject of formula

E = t / psinO

E = 8.0*10^-9/1.364*10^-11 (sin36.4)

E = 8.0*10^-9/1.364*10^-11 * (0.5934)

E = 8.0*10^-9 / 8.094*10^-12

E = 988.39 N/C

the magnitude of this field is E = 988.39 N/C

Answer:

False

Explanation:

It would be a screw

Answer:

Explanation:

The electric charges are placed on a line .

1 a )      q1= +1 nC       q2= -1 nC         q3= -1 nC

here q₁ will be attracted by both q₂ and q₃ so net force on q₁ will be positive

2 a )      q1= -1 nC       q2= +1 nC         q3= + 1 nC

here q₁ will be attracted by both q₂ and q₃ so net force on q₁ will be positive

3 a )      q1= +1 nC       q2= +1 nC         q3= + 1 nC

here q₁ will be repelled  by both q₂ and q₃ so net force on q₁ will be negative.

4 a )      q1= +1 nC       q2= +1 nC         q3= - 1 nC

q2 will repel and q3 will attract so net force will be towards left but it will be weakened .

5 a )      q1= -1 nC       q2= -1 nC         q3= - 1 nC

Both q₁ and q₂ will repel so net force will be towards left and negative .

6 a )      q1= +1 nC       q2= -1 nC         q3= + 1 nC

q2 will attract and q3 will repel   so net force will be towards right  but it will be weakened . It will be positive .

Largest positive force to lowest positive force

2  a ) = 1 a ) >  6 a )

Largest negative  force to lowest positive force

5a )= 3 a ) > 4a )

Answer:

question, report, observe, research, draw conclusions, hypothesize, test hypothesis, experiment

Explanation:

Answer:

750 miles / hour

Explanation:

velocity = distance / time

             = 4500 miles / 6 hours

             = 750 miles / hour

Given:-

To Find: Speed (v) of the particle (airplane).

We know,

s = vt

where,

Similarly,

v = s/t

→ v = (4500 miles)/(6 hours)

→ v = 750 miles/hour ...(Ans.)

Answer: C “The force it exerts on its exhaust gases is equal to the force the exhaust gases exert on the rocket.”

Answer:

B

Explanation:

EDGE 2020

The rod photoreceptor cell type, which is found in the retina, transmits low-light vision and is primarily in charge of the neural transmission of night vision. Thus, option B  is correct.

We can see at night thanks to rods, and we can see color during the day thanks to cones. Although daylight vision is far more important for us, the topic of why there are roughly 20 times more rods than cones in a human retina has typically been met with a shrug.

Rods function in extremely dim lighting. Because just some light particles (photons) may trigger a rod, we employ these for night vision. Because rods hinder color vision, we experience a grayscale world at night. More than 100 million rod cells make up the human eye.

Therefore, The retina's rod photoreceptor cell type conveys vision in low light and is principally in charge of the neuronal activity of night vision.

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Answer:

In order to make a sound wave have a higher pitch you increase the frequency.

In order to increase the volume of a sound wave, you have to increase the amplitude.

Hope this helps!

Answer:

A. Heat is a form of energy.

Explanation:

The Sun emits heat, which is a form of energy. This heat energy is supplied to the Earth by the sun, when the solar energy is converted to heat energy. The study of heat energy and its conversion from one form to another is a branch of physics called THERMODYNAMICS.

Hence, a physicists will be interested in studying the heat given off by the sun because it is one of the several forms of energy.

Answer:

A. Heat is a form of energy.

Explanation:

Answer:

Eu = 0.65 N/C (Approx)

Explanation:

Given:

Time taken = 10 sec

E-field (Initial)(Ei) = 17 N/C

Find:

E-field (Final)

Assume;

Initial charge = Qi

Initial immersed force (Fi) = QiE

Fi = Qi(17)

After 10 sec

Fu = (26)(Qi)(Eu)

So

Fi = Fu

So,

Qi(17) = (26)(Qi)(Eu)

Eu = 17 / 26

Eu = 0.65 N/C (Approx)

Given :

Initial electric field , [tex]E_i=17\ N/C[/tex] .

The total charge on the object increases by a factor of 22 .

To Find :

The magnitude of the E-field after the total charge has changed .

Solution :

Let , initial charge is q .

Therefore , final charge is 22q .

Electrostatic force F is given by :

[tex]F=qE[/tex]

It is also given that the force remains constant .

Therefore ,

[tex]F_i=F_f\\\\qE_i=22qE_f\\\\E_f=\dfrac{E_i}{22}\\\\E_f=\dfrac{17}{22}\ N/C\\\\E_f=0.78\ N/C[/tex]

Hence , this is the required solution .

Answer:

The SI units of the “A” is m (meters)

The SI units of the “B” is m/s^2

Explanation:

Given the distance = d meters.

Time taken to travel = t (seconds)

Function of the distance, d = A + Bt^2

Now we have given the above information and from the given distance function, we have to find the SI units of the A and B. Here, below are the SI units.

Thus, the SI units of the “A” is = m (meters)

The SI units of the “B” is = m/s^2

Answer:

The answer is 6, because 2×y is equal to 12.

Answer:

1: 2

2: 1

3: 3

Explanation:

Answer:Federal System->Power Is divides between state, local etc.

Branches of government-> Power is divided among legislative, executive

Constitutional democracy-> Government power

Explanation:

Answer: the picture is the answer

Explanation:

Answer:

c.  Cos θ =  [tex]A_{x}[/tex] / [tex]\sqrt{(A_{x} ^{2} + A_{y} ^{2}) }[/tex]

Explanation:

A vector is any quantity that has both magnitude and direction. The given vector A has components [tex]A_{x}[/tex] and [tex]A_{y}[/tex], and makes angle  θ with +x axis.

Thus;

Resultant of the vector, A = [tex]\sqrt{(A_{x} ^{2} + A_{y} ^{2}) }[/tex]

Therefore, the components, angle and resultant of vector A can be represented in magnitude and direction by the three sides of a right angled triangle.

Applying the appropriate trigonometric function to the triangle for vector A, we have;

Cos θ =  [tex]A_{x}[/tex] ÷   [tex]\sqrt{(A_{x} ^{2} + A_{y} ^{2}) }[/tex]

⇒   Cos θ =  [tex]A_{x}[/tex] / [tex]\sqrt{(A_{x} ^{2} + A_{y} ^{2}) }[/tex]

The correct option is C.

Answer:

the trajectory for the missile [tex]\mathbf{r(t) = \langle1000t,1400t, 368t -16t^2 \rangle}[/tex]

the downrange of the missile R =  39570.6973 ft

Explanation:

Suppose the initial velocity v(0) = <1000, 1400, 368 > ft/sec

The single force which is acting over the missle is the gravitational force.

a (t) = <0, 0, -32>  ft/sec²

We are to  determine the trajectory and the downrange for the missle

Consider the motion  of a given object r(t) to be:

[tex]r(t) = v_it + \dfrac{1}{2}at^2[/tex]

[tex]r(t) = \langle1000,1400,368 \rangle t + \dfrac{1}{2} \langle 0,0, -32\rangle t^2[/tex]

[tex]r(t) = \langle1000t,1400t,368t \rangle + \langle 0,0, -16 t^2 \rangle[/tex]

[tex]r(t) = \langle1000t,1400t, 368t -16t^2 \rangle[/tex]

Thus, the trajectory for the missile [tex]\mathbf{r(t) = \langle1000t,1400t, 368t -16t^2 \rangle}[/tex]

To determine the downrange of the missile,

[tex]v(0) = \langle 1000,1400,368 \rangle[/tex]

where;

the horizontal vel. of the missle [tex]v_h= \sqrt{1000^2+1400^2}[/tex]

= 1720.4651 ft/s

the vertical vel. of the missile is [tex]v_v = 368 \ ft/s[/tex]

The time required to reach the ground [tex]t =\dfrac{2 \times v_v}{g}[/tex]

[tex]t =\dfrac{2 \times 368}{32}[/tex]

t = 23 sec

Finally, the downrange of the missile [tex]R = v_h \times t[/tex]

R = 1720.4651  × 23

R = 39570.6973 ft

The trajectory of the missile as a function of time is obtained as

[tex]r(t)= <100t, 1400t, 368t-16t^2>[/tex].

Given that the initial velocity is;

[tex]v(0) = <1000, 1400, 368>\,ft/sec[/tex]

The acceleration of the missile is provided by the gravitational force.

[tex]a = g = <0, 0, -32>\,ft/sec^2[/tex]

The trajectory of the object at time 't' is given by;

[tex]r(t)=v(0)\,t+\frac{1}{2} at^2= <100, 1400, 368>t\,+\frac{1}{2} <0, 0, -32>t^2[/tex]

[tex]\implies r(t)= <100t, 1400t, 368t-16t^2>[/tex]

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Answer:

144.63 mph

Explanation:

225 sin (40)

Answer:

19.21 m/s^2

Explanation:

Given that a model airplane is flying North with a velocity of 15 m/s. A strong wind is blowing East at 12 m/s.

The resultant velocity can be calculated by using pythagorean theorem.

Velocity = sqrt( 15^2 + 12^2 )

Velocity = sqrt ( 225 + 144 )

Velocity = sqrt ( 369 )

Velocity = 19.21 m/s^2

Therefore, the plane will be travelling at velocity of 19.21 m/s^2

Answer:

Explanation:

One of the major differences between nuclear reactions and chemical reactions is that nuclear reactions involve larger amount of energy than chemical energy. This is because the force between the protons and neutrons in the nucleus of an atom is much higher than the force of attraction between electrons and the positively charged nucleus, hence nuclear reactions involves/requires a larger amount of energy (because it's reactions involve the nucleus) than chemical reactions (because it's reactions involve the electrons).

Thus, during nuclear fusion, two light nuclei are bombarded against one another to produce a larger/heavier nuclei with the release of large amount of energy (because the forces between the protons and neutrons are much higher) unlike when two atoms/molecules are chemically combined together to form a new molecule with the rearrangement of electrons in the valence shells of the participating molecules.

Answer:

1. High Illiteracy Rate in a Nation has a Negative Impact on the Conducting of Census

2.Corruption Interferes with Census

3.Traditional and Religious Beliefs can Interfere with the Census Exercise

4.insufficient and Ineffective Census Educational Campaign

5.Insufficient Census Experts

Explanation:

Answer:

B:It states a fact about how nature works.

C:It is based on observations of nature.

F:It will most likely remain true even when scientists work with new experiments.

Explanation:

Good luck :)

These are characteristics of a scientific law that states a fact about how nature works. It is based on observations of nature and  It will most likely remain true even when scientists work with new experiments. therefore the correct options are options B, C, and F

Scientific claims are statements made in science based on an experiment.

These Scientific claims are backed by the experimental data and their true results obtained from scientific investigation and experimentation.

scientific law states a fact about how nature works, based on observations of nature. It often changes over time with new experiments and technology and will most likely remain true even when scientists work with new experiments.

Thus, These qualities define a scientific law that establishes a fact about how nature functions. It is based on observations of nature, and even if scientists conduct additional tests, it will probably continue to be true. Hence, choices B, C, and F are the best choices.

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Answer:

4 kilometers

Explanation: