Physics is the branch of science that involves the study of physical phenomena in order to
establish patterns.

false
true

Examples of work taking place include options 1, 2, and 3.

Work is said to be done when a force causes a displacement in an object in the direction of the force. The following situations are examples of work occurring:

Lifting a box off the ground: The force of lifting the box causes a displacement in the box in the upward direction, which is the same direction as the force applied. Therefore, work is done on the box.

Pushing a car up a hill: The force of pushing the car causes a displacement in the car in the direction of the hill, which is the same direction as the force applied. Therefore, work is done on the car.

Carrying a backpack: Although the backpack may not be moving, work is still being done because the force of carrying the backpack causes a displacement in the person's body in the upward direction.

Holding a heavy object: If a person is holding a heavy object, but not moving it, no work is being done on the object because there is no displacement. However, the person's muscles are still working to maintain the position, which is an example of isometric work.

Therefore, options 1, 2, and 3 are examples of work occurring. Option 4 is not an example of work being done on the object, but it is an example of work being done by the person's muscles.

To learn more about work refer to:

brainly.com/question/29266754

#SPJ4

The center of mass of the system is located 1.75 centimeters to the right of the origin.

The center of mass of the system can be found using the formula:

x_cm = (m1x1 + m2x2) / (m1 + m2)

Where x_cm is the center of mass, m1, and m2 are the masses of the two-point masses, and x1 and x2 are their respective positions.

Substituting the values given, we get:

x_cm = (1 gram * -5 cm + 3 grams * 7 cm) / (1 gram + 3 grams)

x_cm = (3 grams * 2 cm) / 4 grams

x_cm = 1.5 cm

Therefore, the center of mass of the system is located 1.5 centimeters to the right of the origin.

learn more about center of mass here:

https://brainly.com/question/28996108

#SPJ4

Superman must apply a horizontal force of 2918.5 N to the boulder to give it a horizontal acceleration of 13.0 m/s^2.

We can use Newton's second law, which states that force equals mass times acceleration. In this case, the mass of the boulder is not given, so we cannot directly calculate the force. However, we know that weight is equal to mass times the acceleration due to gravity (9.8 m/s^2), so we can use this relationship to determine the mass of the boulder.

[tex]2200 N = m * 9.8 m/s^2\\\Solving for mass, we get:\\\m = 224.5 kg[/tex]

We can use Newton's second law to find the horizontal force:

[tex]F = m * a = 224.5 kg * 13.0 m/s^{2 }= 2918.5 N[/tex]

Therefore, Superman must apply a horizontal force of 2918.5 N to the boulder to give it a horizontal acceleration of 13.0 m/s^2.

To know more about Newton's second law, here

brainly.com/question/13447525

#SPJ4

A solar eclipse may occur during the new moon phase of the moon. During this phase, the moon is situated between the Earth and the sun. This positions the moon in such a way that it blocks the sun's rays, causing a solar eclipse.

There are different phases of the moon that occur in a lunar cycle. Each of these phases is determined by the relative position of the sun, Earth, and moon. The lunar cycle is approximately 29.5 days long, and it consists of eight different phases. These phases include the new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent.

In general, solar eclipses occur during the new moon phase of the moon. This is because the moon's position during this phase is directly between the Earth and the sun. As a result, the moon casts a shadow on the Earth, blocking the sun's rays and causing a solar eclipse. However, not all new moon phases lead to a solar eclipse. This is because the moon's orbit is tilted in relation to the Earth's orbit around the sun. Therefore, it must be in the correct position to cause a solar eclipse to occur.

Additionally, it is important to note that not all solar eclipses are total eclipses. Sometimes, the moon only partially covers the sun, resulting in a partial solar eclipse.

For more such questions on Solar eclipse.

https://brainly.com/question/4702388#

#SPJ11

The type of volcanic material that indicates an eruption underwater is pillow lavas. So the correct answer is option C or E.

Pillow lavas are igneous rock formations that occur when magma extrudes from a volcano's vent and cools quickly under seawater or other bodies of water. When magma comes into contact with the water, it cools quickly and solidifies into what looks like a pile of stacked pillows. Pillow lavas are a clear indication of an underwater eruption. Pillow lavas are typically found in submarine basaltic volcanoes, which are located near mid-ocean ridges, and can be found in a variety of other underwater volcanic settings.

Learn more about pillow lavas: https://brainly.com/question/6838240

#SPJ11

The box has gravitational energy. Therefore, option c is correct.

Gravitational potential energy is the energy an object has due to its position in a gravitational field. When the box is lifted to a height of 5m above the ground, it gains an amount of gravitational potential energy equal to the work done on it, which is equal to the force (70N) multiplied by the distance (5m).

When a 70 N force pulls a box straight up 5 m above the ground, and the box is not moving after it is lifted, the type of energy it now has is gravitational energy. Gravitational potential energy is the potential energy stored in an object because of its height over the Earth's surface. An object that has been lifted above the ground has the ability to do work when it falls back to the ground. The work is generated by the object's gravitational potential energy, which is a function of its mass and height over the ground.

As a result, the option c, gravitational, is the correct answer.

To know more about Energy refer here :

https://brainly.com/question/2003548

#SPJ11

The potential difference between xi = -30 cm and xf = 60 cm for the given electric field is -135 V.

To find the potential difference follow these steps:
1. Convert the given positions from centimeters to meters: xi = -0.3 m and xf = 0.6 m.
2. Calculate the potential difference using the formula ΔV = -∫(E(x) dx) over the interval [xi, xf].
3. Integrate the electric field function, Ex = -1000 x, with respect to x: ∫(-1000 x dx) = -500 x² + C, where C is the integration constant.
4. Find the potential difference by evaluating the integral at the given points: ΔV = -500 (xf² - xi^2) = -500 (0.6² - (-0.3)^2) = -500 (0.36 - 0.09) = -500 (0.27).
5. Calculate the result: ΔV = -500 * 0.27 = -135 V.

The potential difference between xi = -30 cm and xf = 60 cm for the given electric field is -135 V.

Learn more about electric field.

brainly.com/question/15800304

#SPJ11

Answer:

15.

a) The energy of a single photon can be calculated using the equation: E = hf, where h is Planck's constant (6.63 x 10^-34 J s) and f is the frequency of the radiation. Thus, E = (6.63 x 10^-34 J s)(c/λ), where c is the speed of light (3.00 x 10^8 m/s) and λ is the wavelength of the radiation. Using the maximum kinetic energy of an emitted photoelectron (0.3 eV) and the work function of the metal plate (2.2 eV), we can find the energy of a single photon: E = 2.5 eV = 4.0 x 10^-19 J.

b) The maximum kinetic energy of a photoelectron can be related to the frequency of the radiation by the equation: KEmax = hf - Φ, where Φ is the work function. Thus, f = (KEmax + Φ)/h. Substituting the given values, we get: f = (0.3 + 2.2) eV/(6.63 x 10^-34 J s) = 3.4 x 10^14 Hz.

c) If the frequency of the radiation is increased, more photoelectrons will be emitted per unit time, so the current in the circuit will increase.

16. a) The threshold frequency of a metal is the minimum frequency of radiation required to emit photoelectrons from the surface of the metal.

i. The graph shows that the kinetic energy of the emitted photoelectrons is zero for frequencies below 5.0 x 10^14 Hz. This means that the photoelectrons are not emitted below this frequency, indicating that the threshold frequency is 5.0 x 10^14 Hz.

ii. The work function of the metal can be calculated using the equation: Φ = hf - KEmax, where h is Planck's constant and KEmax is the maximum kinetic energy of the emitted photoelectrons. At the threshold frequency, KEmax is zero, so Φ = hf. Substituting the given values, we get: Φ = (6.63 x 10^-34 J s)(5.0 x 10^14 Hz) = 3.32 x 10^-19 J.

(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)

If two equal forces are acting in opposite directions on an object, the net force is zero.

The net force when two equal forces are acting in opposite directions on an object is zero. Here's a step-by-step explanation:
1. First, identify the magnitudes and directions of the two forces acting on the object. Let's say force F1 acts in the positive direction, and force [tex]F_2[/tex] acts in the negative direction.
2. Since the forces are equal in magnitude, we can represent them as [tex]F_1[/tex] = [tex]F_2[/tex]
3. Net force is the vector sum of all individual forces acting on the object.

In this case, we only have two forces: [tex]F_1[/tex] and [tex]F_2[/tex].

To calculate the net force, we can use the formula:

Net Force = [tex]F_1[/tex] + [tex]F_2[/tex]
4. As [tex]F_1[/tex] and [tex]F_1[/tex] are acting in opposite directions, we need to take into account their directions when calculating the net force.

As [tex]F_1[/tex] is in the positive direction and [tex]F_2[/tex] is in the negative direction, the formula becomes:

Net Force = [tex]F_1[/tex] - [tex]F_2[/tex]
5. Now, we can substitute the values of [tex]F_1[/tex] and [tex]F_2[/tex].

Since [tex]F_1[/tex] = [tex]F_2[/tex], the equation becomes:

Net Force = [tex]F_1[/tex] - [tex]F_1[/tex].
6. Finally, when we subtract [tex]F_1[/tex] from itself, the result is zero.

Therefore, the net force is zero when two equal forces are acting in opposite directions on an object.
For similar question on net force

https://brainly.com/question/14361879

#SPJ11

The impulse delivered to the superball is greater than the impulse delivered to the clay.

Impulse refers to the change in momentum of an object when a force is applied to it over a certain period of time. Impulse (J) is given by the equation:

J = F × Δt

J = Δp

Where: J is the impulse,

F is the force applied to the object, and

Δt is the time interval over which the force acts.

Δp is the change in momentum

So, the change in momentum for the clay takes a larger time than for the superball. Thus for the same force, a larger impulse has to be imparted to superball than clay.

Therefore, the impulse delivered to the superball is greater than the impulse delivered to the clay.

To know more about impulse, click here:

https://brainly.com/question/16980676

#SPJ12

The relative velocity of the cart relative to the ground when the cart is moving toward the front of the car is 3 m/s.

Given Data:

Train's speed, v = 5.4 m/s

Cart's speed, u = 2.4 m/s

The relative velocity of the cart relative to the ground when the cart is moving toward the front of the car is to be determined. The velocity of an object in a moving frame is equal to the sum of the velocity of the object relative to the moving frame and the velocity of the moving frame. We know that the velocity of the train, v = 5.4 m/s

When the cart is moving forward, the velocity of the cart is the sum of the velocity of the train and the velocity of the cart relative to the train. Therefore, the velocity of the cart when it is moving toward the front is given as:

v = v_train + v_cart (towards the front)v_cart = v - v_trainv_cart = 5.4 - 2.4v_cart = 3 m/s

Therefore, the relative velocity of the cart relative to the ground when the cart is moving toward the front of the car is 3 m/s.

To know more about relative velocity, refer here:

https://brainly.com/question/19260269#

#SPJ11

Astronomers can measure the age of a meteorite that fell from the skies by using radiometric dating techniques.

Specifically, they look for isotopes of certain elements in the meteorite that undergo radioactive decay at a known rate. By measuring the ratio of the parent isotopes to the daughter isotopes, scientists can determine how much time has passed since the meteorite was formed.

For example, the decay of radioactive isotopes of uranium and thorium to lead can be used to date rocks that formed more than 4.5 billion years ago, which is the estimated age of the solar system. Therefore, by analyzing the isotopes present in meteorites, astronomers can determine their age and gain insights into the early history of our solar system.

To know more about meteorite, here

brainly.com/question/29730106

#SPJ4

A scalar quantity is a quantity that just has magnitude and no direction. Scalars include things like length, mass, speed. But a physical quantity is referred to as a vector quantity if it includes both magnitude and direction.

To know more about scalar quantity

https://brainly.com/question/14355265

#SPJ4

The types of light in order of increasing energy are Radio, Infrared, Orange, Green, Ultraviolet, and Gamma rays. Radio waves have the lowest energy, followed by infrared, orange, green, and ultraviolet.

The parts of the electromagnetic spectrum are referred to as gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves, from highest to lowest energy.

Violet light has the shortest wavelength of all visible light, giving it the most energy. The longest wavelength and lowest energy are found in radio waves.

to know more about energy here:

brainly.com/question/1932868

#SPJ1

The force exerted on the car when motorist is pulling on the midpoint of the 3.0-m rope is 400 N.

The question involves the determination of the force exerted on the car when one end of a 3.0-m rope is tied to a tree; the other end is tied to a car stuck in the mud.

The motorist pulls sideways on the midpoint of the rope, displacing it a distance of 0.25 m. If he exerts a force of 200.0 N. Under these conditions, the force exerted on the car can be calculated as follows;

Since the displacement of the rope is perpendicular to the direction of the applied force, the component of the force perpendicular to the rope's direction must be considered. We can calculate the force perpendicular to the direction of the applied force as follows;

F_perpendicular = F x sinθ

where, F is the force exerted, and θ is the angle between the force and the direction of the rope (90°).

Therefore,

F_perpendicular = 200 x sin(90°) = 200 x 1 = 200 N

The force acting on the car is the force in the direction of the rope, which is equal to two times the force perpendicular to the rope direction. Therefore,

F_car = 2 x F_perpendicular

F_car = 2 x 200 N = 400 N

Therefore, the force exerted on the car is 400 N.

Know more about force here:

https://brainly.com/question/12785175

#SPJ11

Answer:

F=Gm1m2/r^2



Explanation:

The radii of a symmetric converging plastic lens that will form an image on the screen twice the height of the object is [tex]R_1[/tex] = 4.28 cm and [tex]R_2[/tex] = 2.1333 cm.

The index of refraction of plastic is 1.59.

The height of the object = h

The height of the image = 2h

We know that the magnification formula is M = -v/u,

where M = -2 (since the height of the image is twice the height of the object),

v is the distance between the image and the lens and

u is the distance between the object and the lens.

Therefore, -v/u = -2 ... (1)

We also know that the lens formula is [tex]\frac{1}{v} - \frac{1}{u} = \frac{1}{f}[/tex],

where f is the focal length of the lens.

Since the lens is symmetric, the radius of curvature of the two surfaces will be equal, which is the same as the focal length of the lens.

Therefore, f = R/2, where R is the radius of curvature of the lens surfaces.

Substituting f = R/2 in the lens formula and simplifying it,

we get, u = 2f/3 ... (2)

We can get the value of v by substituting equation (2) in equation (1) and solving for v.

We get v = -4f/3.

Substituting u and v values in the lens formula, we get,

[tex]\frac{1}{v} - \frac{1}{u} = \frac{1}{f}[/tex], Solving for f, we get

f = 1.0667 cm.

We also know that f = R/2, so R = 2f.

Substituting f value, we get R = 2(1.0667) = 2.1333 cm.

The radii of the two surfaces of the lens will be equal, so [tex]R_1 = R_2[/tex] = 2.1333 cm.

To learn more about lenses refer to: brainly.com/question/28293498

#SPJ11

The following would cause the light bulb to glow : c) Moving the magnet through coil of wire.

When magnet moves through a coil of wire, it creates changing magnetic field that induces electric current in the wire. This current flows through light bulb, causing it to light up.

Bulbs work by sending electricity through curly tungsten filament. The long, twisting path increases electrical resistance faced by traveling electrons, heating filament to some 3000 K. At that temperature, filament glows with  warm yellowish white light.

LED bulb as compared to halogen lamps or incandescent bulbs, has much higher resistance on count of integrated power supply unit. The serial connection of glow lamp clamps the circuit even when the switch is turned off.

To know more about light bulb, refer

https://brainly.com/question/8979272

#SPJ1

Answer:

7 Ω

Explanation:

Given:

R1 = 21 Ω

The connection is parallel

Since all 3 of the resistors have the same resistance, we can use this formula to find the total resistance of the circuit:

R = R1/n (R1 is the resistance of one resistor and n is the number of resistors)

R = 21/3 = 7 Ω

The term we use to generally describe the total incoming solar energy from the sun to the Earth is called solar radiation or solar insolation.

This refers to the electromagnetic radiation emitted by the sun, which includes visible light, ultraviolet (UV) radiation, and infrared (IR) radiation, among others. Solar radiation is the primary source of energy that drives many Earth systems, such as the atmosphere, oceans, and land surface. It is responsible for warming the Earth's surface and fuels photosynthesis in plants, among other important processes. The amount and distribution of solar radiation that reaches the Earth's surface depend on various factors, including latitude, time of day, season, and atmospheric conditions.

To know more about  electromagnetic radiation, here

brainly.com/question/10759891

#SPJ4

---The complete question is, the term we use to generally describe the total incoming solar energy from the sun to the earth is called ___________.------

The magnitude of F black-red compared to F red-black  5 times greater.

The force exerted between two charged objects is given by Coulomb's law:

F = k * (q1 * q2) / r^2

Let's denote the charge on the red balloon as q_red and the charge on the black balloon as q_black. Since the black balloon has 5 times the charge of the red balloon, we can write:

q_black = 5 * q_red

Now let's consider the force exerted by the black balloon on the red balloon. According to Coulomb's law, this force is given by:

F_black-red = k * (q_black * q_red) / r^2

Substituting q_black = 5 * q_red, we get:

F_black-red = k * (5 * q_red * q_red) / r^2

Simplifying this expression, we get:

F_black-red = 5 * (k * q_red^2) / r^2

Similarly, the force exerted by the red balloon on the black balloon is given by:

F_red-black = k * (q_red * q_black) / r^2

Substituting q_black = 5 * q_red, we get:

F_red-black = k * (q_red * 5 * q_red) / r^2

Simplifying this expression, we get:

F_red-black = 5 * (k * q_red^2) / r^2

Comparing the two expressions, we can see that:

F_black-red = 5 * F_red-black

Therefore, the magnitude of the force exerted by the black balloon on the red balloon is 5 times greater than the magnitude of the force exerted by the red balloon on the black balloon.

More on gravitational force can be found here: https://brainly.com/question/807785

#SPJ1

At some distance away from a long, straight current carrying wire, the magnetic field points perpendicular to the wire. This is known as the right-hand rule, which is used to determine the direction of the magnetic field in relation to the direction of the current flow.

A long, straight current-carrying wire produces a magnetic field, and the direction of the field is determined by the right-hand rule. This rule states that if you wrap your right hand around the wire in such a way that your thumb points in the direction of the current, your fingers will point in the direction of the magnetic field.

The direction of the magnetic field can also be determined by the direction of the current flow. The field is perpendicular to the wire and circular around the wire. This means that the field lines of the magnetic field are circular around the wire, and they point in the direction of the current flow.

For more such questions on Magnetic field.

https://brainly.com/question/1433300#

#SPJ11

The magnitude of the force per meter of length on the wire is 6.57 N/m when the wire is perpendicular to the magnetic field. The magnitude of the force per meter of length on the wire is 3.77 N/m when the angle between the wire and field is 34.5∘.

The magnitude of the force per meter of length on a straight wire carrying a 7.30 a current when perpendicular to a 0.90 T uniform magnetic field can be calculated using the formula:

F = B * I * L

where F is the force, B is the magnetic field, I is the current, and L is the length of the wire.

Since we want to calculate the force per meter of length, L = 1 meter.

F = 0.90 T * 7.30 A * 1 m = 6.57 N/m

If the angle between the wire and field is 34.5°, we need to use the formula:

F = B * I * L * sin(θ)

where θ is the angle between the wire and the magnetic field.

F = 0.90 T * 7.30 A * 1 m * sin(34.5°) = 6.57 N/m * sin(34.5°) ≈ 3.77 N/m

So, the magnitude of the force per meter of length is 6.57 N/m when perpendicular, and 3.77 N/m when the angle is 34.5°.

Learn more about magnitude.

https://brainly.com/question/2596740

#SPJ11

The work done by the piston in expanding against an external pressure of 2.35 atm is 545 J.

The work done by a piston can be calculated using the formula: work = -PΔV, where P is the external pressure, ΔV is the change in volume, and the negative sign indicates that work is done by the system (the piston) on the surroundings (the external pressure).

In this case, the external pressure is 2.35 atm, the initial volume is 0.455 L, and the final volume is 1.318 L. Therefore, the change in volume is:

ΔV = final volume - initial volume

ΔV = 1.318 L - 0.455 L

ΔV = 0.863 L

Substituting the values into the formula, we get:

work = -PΔV

work = -(2.35 atm)(0.863 L)

work = -2.025 J

Since the work done is negative, it means that the system loses energy as it expands against the external pressure. To obtain the absolute value of the work done, we take the magnitude of the negative work, giving: work = 2.025 J

Therefore, the work done by the piston in expanding against an external pressure of 2.35 atm is 545 J (rounded to three significant figures).

To know more about work done, refer here:

https://brainly.com/question/29762840#

#SPJ11

The Doppler method is used to discover a planet around a nearby star that is similar to the Sun; the velocity curve has a period of 6 months. We can conclude that the planet's orbital distance is 1 AU.

The Doppler method is a technique for discovering planets that orbit other stars. The Doppler method, also known as the radial velocity method, involves measuring the movement of a star towards or away from the observer. As a planet orbits a star, it pulls the star in a small, regular circle around the center of mass of the planet-star system.The period of the velocity curve can be used to determine the planet's orbital period and distance.

If the velocity curve has a period of 6 months, the planet's orbital period is also 6 months. Kepler's third law can then be used to determine the planet's orbital distance.

According to Kepler's third law, the square of a planet's orbital period is proportional to the cube of its orbital distance. P² α a³  where P is the orbital period and a is the orbital distance.

Thus, a² ∝ P²/3a² = 1 AU (since P = 6 months).

Therefore, we can conclude that the planet's orbital distance is 1 AU.

To know more about Doppler method refer here :

https://brainly.com/question/15318474

#SPJ11

Answer:incidence

Explanation: Because it depends on incident

The acceleration of van is -10.0 m/s².

Acceleration is defined as the rate of change of velocity. It is a vector quantity, which means it has both magnitude and direction. In the context of this problem, the van's velocity changed from 20 m/s to 10.0 m/s in a time of 3.0 s. We can calculate the acceleration of the van using the formula,

acceleration = (final velocity - initial velocity) / time

Substituting the given values, we get,

acceleration = (10.0 m/s - 20 m/s) / 3.0 s

= -10.0 m/s²

The negative sign indicates that the acceleration is in the opposite direction to the initial velocity. In other words, the van is decelerating, or slowing down.

To know more about acceleration, here

brainly.com/question/21329936

#SPJ4

The current through the long straight wire is 45.7 A.

The magnetic field produced by a long straight wire carrying a current is given by the formula B = (μ0I)/(2πr), where B is the magnetic field, μ0 is the permeability of free space, I is the current, and r is the distance from the wire. Rearranging the formula to solve for I, we get I = (2πrB)/μ0.

Substituting the given values, we have B = 1.70 T and r = 0.0370 m. The permeability of free space μ0 is a constant equal to 4π × 10⁻⁷ T·m/A. Thus, we can calculate the current I as I = (2π0.0370 m1.70 T)/(4π × 10⁻⁷ T·m/A) = 45.7 A.

Therefore, the current through the long straight wire is 45.7 A.

To know more about current, refer here:

https://brainly.com/question/16595375#

#SPJ11

The work done by the horizontal force is found to be 60J and the work done by the gravity and the normal force is 0J.

The horizontal force that is applied is 20N and the mass of the box is 5.0 Kg and the force moves the box with a constant speed till a distance of 3.0m.

Now, first understand the work and force relation,

W= Fs.cosA, where, W is work, F is applied force, A is the angle between force and distance s.

For (a) and (b),

The work done by the gravity and the normal force on the block will be ) J because the angle A = 90 degrees.

(c). The work done by the horizontal force is given by the above formula by putting all the values, The value of the angle A is 0 degrees and the value of cos(0) = 1.

W = (20)(3)

W = 60J

So, the work done by the horizontal force is 60J.

To know more about Work done, visit,

https://brainly.com/question/8119756

#SPJ4