What is the net force acting on this box?

Answer:

2990W

Explanation:

Given parameters:

Voltage  = 230V

Current = 13A

Unknown:

Maximum power it can safely use  = ?

Solution:

To solve this problem;

       Power  = Current  x Voltage

     Power  = 230 x 13  = 2990W

Answer:

•marine biology.

Explanation:

A mechanical engineer is a professional individual who ensures the design of a mechanical assembly as well as the monitoring of its realization. His role involves the manufacturing of a prototype and developing new products for the company. Responsible for manufacturing, he advises the company and customers and assesses the risks and techniques used for its development. Finally, he supervises the installation and the market penetration of the product, as well as its maintenance.

A mechanical engineer can collaborate with many useful and complementary professions such as designers or marketers, it ensures the appearance and technical operation of the product. It is a job under high responsibility with projects that can be large.

Finally, he can also work in the construction sector, in the automotive industry, biomechanics, shipbuilding, aerospace production and aeronautics, railways, mechanics and metallurgy, robotics, textile machinery, etc.

Answer:

The objects in interaction A are farther apart than in interaction B.

The objects in interaction A are farther apart than in interaction B.

According to Coulomb's law: The magnitude of each of the electric forces with which two point-at-rest charges interact is directly proportional to the product of the magnitude of both charges.

And inversely proportional to the square of the distance that separates them and has the direction of the line that joins them.

The formula will be given as:

] [tex]F=\dfrac{kq_1q_2}{r^2}[/tex]

Intersaction A is having weak force since the magnitude of the force is same in both interaction A and B from the formula of force the force is also dependent on the distance between the charge.

Thus the weak force in the interaction A is due to the higher distance between the two charges.

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Answer:

a. 150 J

b. 150 J

c. 0 J

d. 0 J

Explanation:

The given parameters are;

The horizontal force with which the man pulls the canister, F = 50 N

The distance he moves the vacuum cleaner, d = 3.0 m

a. Work done, W = Force applied, F × Distance moved by the force, d

Therefore, for the work done by the 50 N force on the canister, we have;

W = 50 N × 3.0 m = 150 N·m = 150 J

b. Given that he pulls the canister at a constant speed, we have;

The acceleration of the canister, a = 0 m/s²

Therefore, the net force on the canister, [tex]F_{NET}[/tex] = F - [tex]F_{Friction}[/tex]  = m × a

Where;

m = The mass of the canister

a = The acceleration of the canister

F = The applied force = 50 N

[tex]F_{Friction}[/tex] = The force of friction

∴ [tex]F_{NET}[/tex] = m × a = m × 0 m/s² = 0 N

Therefore;

[tex]F_{NET}[/tex] =  F - [tex]F_{Friction}[/tex] = 0 N

From which we have;

F = [tex]F_{Friction}[/tex] = 50 N (The applied force, F is equal to the force of friction,

The work done by friction = The force of friction × The distance in which the force of friction acts

∴ The work done by friction = [tex]F_{Friction}[/tex] × d - 50 N × 3.0 m = 150 J

The work done by friction = 150 J

c. The normal force, N acts perpendicular to the force of friction

The distance the canister moves in the perpendicular direction, [tex]d_p[/tex] = 0 m

∴ The work done by the normal direction = N × [tex]d_p[/tex] = N × 0 m = 0 J

The work done by the normal direction = 0 J

d. The vacuum weight, W, acts on the same line as the normal force but in the opposite direction to the normal force, N

Therefore, the weight, W, acts perpendicular to the line of motion of canister

The distance the canister moves in the direction of the weight, [tex]d_{wieght}[/tex] = 0 m

Therefore, the work done by the weight = W × [tex]d_{wieght}[/tex] = W × 0 m = 0 J

The work done by the weight = 0 J

Answer:B

Explanation:onec thwy tried others

Answer: v = 2.24 m/s

Explanation: The Law of Conservation of Energy states that total energy is constant in any process and, it cannot be created nor destroyed, only transformed.

So, in the toy launcher, the energy of the compressed spring, called Elastic Potential Energy (PE), transforms into the movement of the plastic sphere, called Kinetic Energy (KE). Since total energy must be constant:

[tex]KE_{i}+PE_{i}=KE_{f}+PE_{f}[/tex]

where the terms with subscript i are related to the initial of the process and the terms with subscript f relates to the final process.

The equation is calculated as:

[tex]\frac{1}{2}kx^{2}+0=0+\frac{1}{2}mv^{2}[/tex]

[tex]\frac{1}{2}kx^{2}=\frac{1}{2}mv^{2}[/tex]

[tex]\frac{1}{2}50(0.1)^{2}=\frac{1}{2}(0.1)v^{2}[/tex]

[tex]v^{2}=\frac{50(0.1)^{2}}{0.1}[/tex]

[tex]v=\sqrt{50(0.1)}[/tex]

[tex]v=\sqrt{5}[/tex]

v = 2.24

The maximum speed the plastic sphere will be launched is 2.24 m/s.

The maximum speed of plastic sphere is 2.236 m/s, when sphere is launched.

The maximum velocity of sphere can be calculated by,

[tex]V_{max}= x \sqrt {\dfrac km}[/tex]

Where,

[tex]V_{max}[/tex] - maximum velocity of the sphere

[tex]x[/tex] - length of stretch = 0.10 m

[tex]k[/tex]-  spring constant = 50 N

[tex]m[/tex]- mass of sphere =  0.10 kg

Put the values in the equation,

[tex]V_{max}= 0.1\sqrt {\dfrac {50}{0.1}}\\\\V_{max}= 0.1\times {22.36}\\\\V_{max}= 2.236\\[/tex]

Therefore,  the maximum speed of plastic sphere is 2.236 m/s, when sphere is launched.

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Answer:

AD

Explanation:

electromagnetic waves do not need a medium to travel, examples are ultraviolet radiation and infrared radiation.

Answer:

A and D

Explanation:

Just did it

Answer:

A= 150 J

Explanation:

Kinetic energy is the energy of an object in motion.

The formula for kinetic energy is ;

K.E = 1/2 * m *v²  where m is mass and v is velocity

Work done is equal to change in kinetic energy

W= Δ K.E

Given that K.E = 150 J

Taking that the ball was stationary before it was thrown, this makes its initial kinetic energy to be 0 J so the work done will be

W=  Δ K.E

W= 150 - 0

W= 150 J

Answer:

Zero

Explanation:

The net force acting on an object moving with constant velocity is zero. This is an accordance with the Newton's first law of motion.

Newton's first law of motion states that a body will continue in its state of rest or constant motion unless it is acted upon by an external force.

Since this body is moving with uniform motion, it is not accelerating. When a body is acceleration, the net force on it is not zero.

But this one is moving with uniform motion. The net force on the body is balanced and zero.

Answer:

3.88m/s

Explanation:

Using the law of conservation of momentum

m1u1+m2u2 = (m1+m2)v

m1 and m2 are the masses

u1 and 2 are the initial velocities

v is the final velocity

Given

m1 = 64kg

u1 = 4.2m/s

m2 = 25kg

u2 = 3.2m/s

Required

Final velocity v

Substitute the given values into the formula

64(4.2)+25(3.2) = (65+25)v

268.8+80 = 90v

348.8 = 90v

v = 348.8/90

v = 3.88m/s

Hence the velocity of the kayak after the swimmer jumps off is 3.88m/s

Answer:

Group 3

Explanation:

In groups moving from top to bottom in a group, valency remains same because number of valence electron remains same.

eg . valency of first group elements = 1

valency of second group = 2

valency of third group = 3

Hope it is useful

Answer:

A-Top of the Circle

Please mark me branilist

Answer:

Distance 50m

final velocity 20ms^-1

[tex]s = ut + \frac{1}{2} a {t}^{2} \\ = 0 \times t + \frac{1}{2} \times 4 \times {5}^{2} = 50m[/tex]

[tex]v = u + at \\ v = 0 + 4 \times 5 \\ v = 20ms^{ - 1} [/tex]

Answer:

B

Explanation:

cause it be like that

B. The type of liquid inside the boiling vessel.

Paraffin oil is used for boiling factor willpower as it has a very excessive boiling factor and so it could be used to hold a high temperature within the boiling factor and melting factor equipment without lack of the substance.

Boiling is the process by which a liquid will become a vapor whilst it's miles heated to its boiling point. The alternative from a liquid segment to a gaseous segment occurs while the vapor pressure of the liquid is identical to the atmospheric stress exerted on the liquid.

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#SPJ2

Answer:

11m/s^2

Explanation:

Acceleration can be calculated by diving speed by time. Since we know speed and time, acceleration can be calculated.

55/5 = 11m/s^2

Answer:

The weight of the object when it is lifted to 3 times the height is 33.[tex]\overline 3[/tex] N

Explanation:

The given parameters are;

The weight of the object on Earth, W = 300 N

The initial position of the object = On the surface of the Earth

Therefore;

The distance with which the weight is measured = The radius of the Earth, R

By Newton's Law of Gravitation, we have;

[tex]W = G \times \dfrac{M \times m}{R^2}[/tex]

Where;

W = 200 N

G = The universal gravitational constant

M = The mass of the Earth

m = The mass of the object

When the height of the object = 3 × R, the weight of the object, W₂, is given as follows;

[tex]W_2 = G \times \dfrac{M \times m}{(3 \times R)^2} = \dfrac{1}{9} \times G \times \dfrac{M \times m}{ R^2} = \dfrac{1}{9} \times W = \dfrac{1}{9} \times 300 N = 33.\overline 3 \ N[/tex]

Therefore, the weight of the object at 3 times the height, W₂ = 33.[tex]\overline 3[/tex] N

d. all of these

look at the picture to know from where we get this law with application on it

Answer:

When the object is placed between centre of curvature and principal focus of a concave mirror the image formed is beyond C as shown in the figure and it is real, inverted and magnified.

solution

Answer:

D. 256 m/s

Explanation:

[tex]f[/tex] = Frequency of the wave = [tex]16\ \text{Hz}[/tex]

[tex]\lambda[/tex] = Wavelength = [tex]16\ \text{m}[/tex]

Speed of a wave is given by

[tex]v=f\lambda[/tex]

[tex]\Rightarrow v=16\times 16[/tex]

[tex]\Rightarrow v=256\ \text{m/s}[/tex]

The speed of the wave as it passes through the cloud of nitrous oxide is [tex]256\ \text{m/s}[/tex].

Answer:

D. 256 m/s​

Explanation:

d. d as in dog

Answer:

yuuuhhhhhhh

Explanation:

it maxed Imao

Answer:

false

Explanation:

took test

Answer:

bring each tube close to the plastic ball and note any movement of the ball

Explanation:

study island

just took the test!!!!!

Answer:

bring each tube close to the plastic ball and note any movement of the ball

Explanation:

Electric fields can exert forces on objects, even if the objects involved are not touching. One way to demonstrate that electric fields exist around charged objects is to observe the effects of their forces at a distance.

Since the plastic ball of the electroscope is made of insulating plastic and is uncharged, it will be attracted to any charged object brought near it. So Jen can observe the effects of the tube's electric fields by bringing each tube close to the plastic ball and noting any movement of the ball. If the ball moves toward a tube, then the process that Jen used on the tube generated an electric field.

Answer:

91936J

Explanation:

We know that kinetic energy= 1/2 mv^2

M= mass = 68 Kg

v= velocity= 52 m/s

KE=1/2 × 68 × (52)^2

KE= 1/2 × 68 × 2704

KE= 91936J

Answer:

.5m/s/s

Explanation:

V + at

Answer:

Explanation:

The formula for calculating workdone is expressed as;

Workdone = Force * Distance

Get the force

F = nR

n is the coefficient of friction = 0.5

R is the reaction = mg

R = 46 ( 9.8)

R = 450.8N

F = 0.5 * 450.8

F = 225.4N

Distance = 10.3m

Get the workdone

Workdone = 225.4 * 10.3

Workdone  = 2,321.62Joules

Hence the amount of work done is 2,321.62Joules

Answer:

The main idea of the text is to tell you how Phillis wheatley grew up and what the person life was like

Answer:

p = 65.52 kg m/s

Explanation:

p = m × v

p = 31.2 × 2.1

p = 65.52 kg m/s