Force F⃗ =−13j^N is exerted on a particle at r⃗ =(3i^+5j^)m.
What is the torque on the particle about the origin?

Answer:

J = 500 kg-m/s

Explanation:

Given that,

Initial speed of the motor, u = 5 m/s

Final speed of the motor, v = 7 m/s

Mass of the boat, m = 250 kg

We need to find the impulse applied by the motor. We know that impulse is equal to the change in momentum. It is represented by letter J.

J = m(v-u)

J = 250 (7-5)

J = 500 kg-m/s

Hence, the impulse applied by the motor is 500 kg-m/s.

A short to voltage failure would occur if the copper conductors of two insulated wires came into contact and melted together.

The difference in electric potential between two points, also known as voltage, electric potential difference, electric pressure, or electric tension, is measured as the amount of work required to move a test charge per unit of energy between the two sites.

The formula reads voltage = current x resistance, or V = A x, or volts = amps x ohms.

Electrical services are categorized:

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Answer:

B

Explanation:

4.3 m/s. C. 5.8 m/s. D. 7.7 m/s. 14. A crane lifts a 300 kg load at a constant speed to the top of a building 60 m high in 15 s. The average power.

9 pages

The success of a business venture depends on the effective management of the 4Ms of production/operation, which involves strategic planning, resource allocation.

The 4Ms of production/operation are Manpower, Materials, Machines, and Methods. To plan for the operations of a new business venture, the first step is to define the goals of the business and identify the target customers. The next step is to determine the resources required to operate the business efficiently.

For the Manpower component, it is essential to hire skilled and experienced individuals who can contribute to the success of the business. For instance, you may need to hire marketing experts, finance professionals, IT professionals, and operational staff.

For the Materials component, it is essential to identify the type and quality of materials required for the products or services to be offered. It is also necessary to ensure that the materials are obtained from reliable suppliers.

For the Machines component, it is essential to identify the appropriate machinery, equipment, and tools required to carry out the operations of the business. It is also necessary to ensure that the machines are well-maintained to avoid breakdowns that could delay operations.

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A pebble off a cliff to hit the ground below t = 0.128 sec.

Given,

distance = 18m

velocity = 2.3m /s

time = ?

To find the time in given data,

Use formula,

velocity = distance / time

Putting the value in formula,

We get,

2.3 m/s = 18 m / t

t = 2.3 m/s / 18 m

t = 0.128 sec

The vector quantity velocity (v), denoted by the equation v = s/t, measures displacement (or change in position, s), over change in time (t). Speed (or rate, r) is a scalar quantity, denoted by the equation r = d/t, that measures the distance traveled (d) over the change in time (t).

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Answer:

6J

Explanation:

simply apply kinetic energy definitoon:

\(k = \frac{1}{2} mv {}^{2} = \frac{1}{2} 3 \times 2 {}^{2} = 6\)

Answer:

Part A

The power to turn on the lamp, ∑P = 3.36 W

Part B

The Resistor required is approximately 8.04 Ohms

Part C

The time for all the lights to go out is approximately 21.43 hours

Explanation:

The input voltage of the motor battery , V = 12 V

The capacity of the battery, Q = 6 Ah

The number of lamps in parallel = 8 lamps

The maximum voltage of each lamp,  = 3 V

The electric current in each lamp = 140 mA

The energy available in a battery, E = Q × V

For the battery, we have;

E = 6 Ah × 12 V = 72 Wh

The energy available in a battery, E = 72 Wh

Part A

The power used by the lamps, \(P_i\) = \(I_i\) × \(V_i\)

∴ The total power used by the lamp, ∑P = 8 × 0.14 A × 3 V = 3.36 W

The power to turn on the lamp, ∑P = 3.36 W

Part B

The resistance required, is given as follows;

Resistor required = (Battery voltage - Lamp voltage)/(The sum of bulb current)

∴ Resistor required = (12 V - 3 V)/(8 × 0.14 A)

The Resistor required = 8.03571429 Ohms

The Resistor required ≈ 8.04 Ohms

Part C

The time for all the lights to go out = The time for the lamps to use all the power available in the battery

The time for all the lights to go out, t = E/∑P

∴ t = 72 Wh/(3.36 W) = 21.4285714 h

∴ The time for all the lights to go out, t ≈ 21.43 h

The time for all the lights to go out = The time for the lamps to use all the power available in the battery = t ≈ 21.43 h

∴ The time for all the lights to go out ≈ 21.43 hours.

Explanation:

light waves because the categorised under mechanical waves

Orbital velocity of satellite

\(v = \sqrt{ \frac{gm}{r} } \)

Radius of new orbit r' =6r

Thus new orbital velocity of satellite:

\(v = \sqrt{ \frac{gm}{6r} } = \frac{v}{ \sqrt{6} } \)

For satellites in circular orbits, the relationship between orbital velocity and altitude is strict. The task of a satellite launch rocket is to release the satellite at a suitable place in space, with the appropriate speed and direction of movement to put it in the desired orbit.

How a satellite stays in orbit can be thought of in two equivalent ways, both of which explain the relationship between the satellite's altitude and velocity.

The motion of the satellite can be seen as creating a centrifugal force that opposes the gravitational pull. For example, imagine attaching an object to a string and swinging it in a circle. The object is pulling outward against the string, and that outward force (centrifugal force) becomes greater the faster the object swings. At the right speed, the centrifugal force of the satellite due to motion around the earth just balances the gravitational pull, and the satellite remains in orbit.

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Answer:

A

Explanation:

I just did it and got it right

A  graph of extension against force for an elastic material is a straight line from origin.

Hookes's law states that, the extention of a material is directly proportional to the force applied as long as the elastic limit is not exceeded.

Hence, a graph of extension against force for an elastic material is a straight line from origin.

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The height the ball will reach if the initial kinetic energy is double is 4 times the original height (4h).

The initial kinetic energy of the ball is given as K0, and it is related to the initial velocity v₀ by the formula \(K_0 = 1/2mv0^2\), where m is the mass of the ball. When the ball is shot straight up, it reaches a maximum height h, which can be calculated using the formula\(h = v_0 {^2/2g\), where g is the acceleration due to gravity.

If the initial kinetic energy of the ball is doubled, then the initial velocity of the ball will also double, since \(K_0 = 1/2mv0^2\).

Therefore, the new initial velocity is
\(v_0 = \sqrt{(2K_0/m)\)
\(= \sqrt(21/2m*v_0 ^ {2}/m)\)
\(= \sqrt{(2)*v_0.\)

Using the formula for maximum height, the new maximum height h' can be calculated as \(h' = v_0^2/2g = (\sqrt{(2)*v_0)^2}/2g = 2v_0^2/2g = 2h.\)

Therefore, the new height the ball will reach if the initial kinetic energy is double is 2 times the original height (2h), or 4 times the original height (4h) if compared to the initial height before being shot up.

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The volume occupied by the one ounce gold coin (i.e 33.932 g), given that its has a density of 19.25 g/cm³, is 1.76 cm³

The following data were obtained from the question:

gold bar. Details below:

The volume of the gold coin can be obtained as follow:

Density = mass / volume

Cross multiply

Density × volume = mass

Divide both sides by density

Volume = mass / density

Volume of gold = 33.931 / 19.25

Volume of gold = 1.76 cm³

Thus, we can conclude that the volume occupied is 1.76 cm³

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The other forms of electromagnetic radiation you think could be ionizing are x-rays and gamma rays.

Ionizing radiation, including nuclear radiation, consists of subatomic debris or electromagnetic waves which have sufficient strength to ionize atoms or molecules by using detaching electrons from them.

Electromagnetic radiation consists of waves of the electromagnetic subject, which propagate thru an area and deliver electromagnetic radiant electricity. It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. All of those waves form part of the electromagnetic spectrum.

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Answer:0

Explanation:

All stationary objects have no momentum they do not have any motion to have momentum you need mass and motion

The solid sphere will reach the bottom of the inclined plane first. The reason for this is that the sphere has the smallest surface area to volume ratio which means that there is less friction acting on it as it rolls down the incline.

Solid sphere moves more quickly than solid cylinder because it has a lower moment of inertia and more kinetic energy during translation. Comparable solid objects move more slowly than hollow ones.

If a cylinder and a sphere have the same mass and radius, the cylinder will have a greater moment of inertia due to its greater mass at its edges. Because the sphere's moment of inertia is smaller, it will move faster and arrive at the bottom first.

The process by which potential energy (PE) is transformed into kinetic energy is the cause of the solid cylinder's faster descent than the hollow cylinder. Some of the PE is transformed to rotating kinetic energy (RKE), not simply linear kinetic energy, because the cylinder is rolling (LKE).

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Answer:

60 i think is the answer correct me if i am wrong

Explanation:

subtract your age from 220

Answer:

r = 0.0548 m

Explanation:

Given that,

Singly charged uranium-238 ions are accelerated through a potential difference of 2.20 kV and enter a uniform magnetic field of 1.90 T directed perpendicular to their velocities.

We need to find the radius of their circular path. The formula for the radius of path is given by :

\(r=\dfrac{1}{B}\sqrt{\dfrac{2mV}{q}}\)

m is mass of Singly charged uranium-238 ion, \(m=3.95\times 10^{-25}\ kg\)

q is charge

So,

\(r=\dfrac{1}{1.9}\times \sqrt{\dfrac{2\times 3.95\times 10^{-25}\times 2.2\times 10^3}{1.6\times 10^{-19}}}\\\\r=0.0548\ m\)

So, the radius of their circular path is equal to 0.0548 m.

Answer:

150 N= 15 or 150 N= 1.1

Explanation:

What I did was subtract 165kg and 150 N and I divided it too but I got 1.1 so yuhh

This demonstrates that the most harmful electromagnetic waves are those with the highest frequency and shortest wavelength.

Visible light, radio, television transmissions, microwaves, and X-rays are all examples of electromagnetic radiation, which is present in a broad variety of wavelengths and frequencies in the electromagnetic spectrum. The majority of the time, radiation with wavelengths far shorter than visible light has enough energy to remove electrons from atoms. It is referred to as Ionizing radiation.

The danger to living things increases generally with shorter wavelength. Very short wavelengths, including X-rays and gamma rays, can quickly harm living tissue, notwithstanding the dangers associated with longer wavelengths.

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The complete question is:

Sunburn is brought on by ultraviolet rays, and our bodies can be deeply penetrated by X rays. Gamma rays eliminate cancerous cells. What does this show about how living material is affected the shortest wavelengths in the electromagnetic spectrum?

Answer:

Lead

Explanation:

To figure out if the given metal is silver, lead, or aluminum, we have to calculate its specific heat capacity, which is the heat energy required to raise the temperature of one kilogram of the respective substance by one degree Celsius (or one Kelvin).

To do that, we can use the following formula:

\(\boxed{C = \frac{Q}{m \cdot \Delta T}}\),

where:

• C ⇒ specific heat capacity (J kg⁻¹ K⁻¹)

• Q ⇒ heat energy (J)

• m ⇒ mass of object (kg)

• ΔT ⇒ change in temperature (K)

Using the given information and the formula above, we can calculate the specific heat capacity of the given metal:

\(\mathrm {C = \frac{3250 \ J}{1.32 \ kg \times (292 - 273) \ K }}\)

   = 129. 6 J kg⁻¹ K⁻¹

Therefore, the metal is lead, because the specific heat capacity of lead is around 130 J kg⁻¹ K⁻¹, which is very close to the answer we got.

Answer:

31.25 is the correct answer

Answer:

20 m/s

Explanation:

initial velocity, u= 25m/s

u has two components. one in horizontal and in one vertical.

so,

u sin theta = vertical component.

=> u sin theta = 25× 4/5

= 20 m/s

Answer:

The mass of woman is 59.18 kg.Given data:Weight of women is, .An object on the surface has its weight such that it is determined by the force of gravity acting on the object. Mathematically, the weight of object is calculated by multiplying the gravitational acceleration with mass of object.Then,Here, m is the mass of woman and g is the gravitational acceleration.Solving as,Thus, the mass of woman is 59.18 kg.

Explanation:

59.18 kg

Hope this helps! :)

The frequency of the signal is = 2.5 Hz

The wavelength of the sonar device = 5.9 m

The velocity of the sound = 15 m/s

The frequency = ?

But the formula for the velocity of sound wave = frequency × wavelength

Male frequency the subject of formula,

f = v/ wavelength

f = 15/5.9

f = 2.5Hz

Therefore, the frequency of the signal is = 2.5Hz

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Answer:

Robert Hooke used an early microscope to observe a cork sample. How did this help contribute to cell theory? It helped to show that cells contain water. ... It helped to show that some cells are visible to the naked eye.

Explanation:

If your teacher checks if it was copied just put it in your on words

Answer:

Explanation:

a = 4m/s

b = 7m/s

R = ?

R = sq. 4*2 + 7*2 + 2 x 4 x 7 x cos60

R = sq 93

direction is the angle which is already given in question.

Answer: Air

Explanation:

Roffns dn b bdd