A 60.0 kg student is riding in an elevator when it starts accelerating upward at 3.0 m/s2. What is the apparent weight the student feels?

Answer:

Therefore, the acceleration of the car will be 4 (ms2).

The points on the t axis separated by the time interval T are K and P.

The true choice is C.

In Physics, a period is the length of time it takes for one oscillation or one wave to occur. The symbol for the period is T with units of seconds or seconds (s).

K and P are one wave on the transverse wave. One wave is a combination of one hill and one valley.  While K and M are defined as half waves.

Water waves, rope waves, and light waves. is a wave whose direction of propagation is parallel to the direction of vibration.

In longitudinal waves, one wave consists of one stretch and one density.

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Answer:

Below

Explanation:

At 0    ( or between 30 N and 30 S)    

   they travel the largest circle circumference in a 24 hour day rotation

Answer:

Decrease

Explanation:

Decrease

Vertical component = v sin (angle)

  sin 30 is less than sin 35

Heat is transferred by a fluid's macroscopic movement, which is known as convection. Weather systems and forced-air furnaces both use this form of transmission. Thus, option A is correct.

Convection, as heat is transmitted through the sand's solid structure. Conduction, as the air particles that come into contact with the hot sand travel more quickly.

The heat is transferred inside the fluid during convection. Heat transfer in radiation happens by electromagnetic waves without the use of particles.

Conduction, as heat is transferred using electromagnetic waves Convection, since heat is transferred by air particles without the usage of a medium.

Therefore, Convection, because heat is transferred through the solid sand.

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Answer:

The mass of the object is 21 kg.

Explanation:

To find the mass of an object with a given kinetic energy and velocity, you can use the formula for kinetic energy, which is KE = 1/2 * m * v^2, where m is the mass of the object, v is its velocity, and KE is its kinetic energy.

In your case, the velocity is 10 m/s and the kinetic energy is 105j, so you can solve for m by rearranging the formula to solve for mass.

This gives you m = 2 * KE / v^2, or m = 2 * 105j / 10^2, which means the mass of the object is 21 kg.

Elastic potential energy is the  energy stored as a resulting of the applying a force to deform an elasticity object.

Elastic potential energy is the  energy stored as of a result of applying a force to the  deform an elasticity object. The energy is the  stored until the force is to the  removed and the object by  springs back to it's own shape, doing work in the process.

Elastic potential energy is the  energy stored as a result of the applying by a force to the  deform an elasticity of object. The energy is stored by it's until the force is the  removed and the object of the  springs back to its own original shape, doing their work in the processing. There are deformations could involve compressions, stretching or the twisting of the object.

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Option B The recession velocity of a galaxy is directly proportional to its distance from us is the correct option.

Hubble-Lemaître law

The Hubble-Lemaître law, sometimes referred to as Hubble's law, is the finding in physical cosmology that galaxies are eloping from Earth at rates proportionate to their separation. In other words, they are travelling away from Earth more quickly the more away they are. The redshift of the galaxies—a shift in the light they emit toward the red end of the visible spectrum—has been used to calculate their velocities.

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Answer: 65 amu

Explanation: Proton+ Neutron

Answer: The net force equals the mass times the acceleration so answer 1 would be 16N (4x4). Does that help at all?

Explanation:

Answer:

truck, since it has more mass

Explanation:

truck, since it has more mass

formula:

momentum (p) = mass (m) times velocity (v)

height has nothing to do with it

Power is the rate at which work is done or energy is transmitted. In other words, it is a measure of the amount of work that can be done in a given amount of time. Power is typically measured in watts, where one watt is equal to one joule of energy per second.

To determine power, you need to know the amount of work being done and the time it takes to do that work. For example, if a machine lifts a weight of 100 joules in 2 seconds, the power of the machine is 100/2 = 50 watts.

Another way to determine power is to measure the rate at which electrical energy is being transferred. In this case, power is calculated by multiplying the voltage of the electrical current by the current itself. For example, if an electrical current has a voltage of 10 volts and a current of 5 amps, the power would be 10 x 5 = 50 watts.

It is important to note that power is not the same as energy. While power is a measure of how quickly work is done or energy is transferred, energy is a measure of the total amount of work that can be done or the total amount of energy that can be transferred.

Answer:

power is the amount of energy transferred or converted per unit time. The formula is P = E/t, where P means power, E means energy, and t means time in seconds. This formula states that power is the consumption of energy per unit of time.

The crane weighs 441 N. The horizontal component of the normal force at an angle of 35° is 361 N.

Force is physical quantity generating a displacement or deformation for a body. Force is having a magnitude and direction thus, it is a vector quantity.

The normal force acting on a body is mg, that is the product of its mass and acceleration due to gravity. Force can have a vertical and horizontal component.

vertical component of normal force  = N sin ∅

horizontal component = N cos  ∅.

Given the angle in the inclined plane is 35°  in horizontal direction.

Thus normal force = 441 N × cos 35°  = 361 N.

Therefore, the magnitude of normal force acting on the crane is 361 N.

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The pressure differential between the cylinder's top and bottom is expressed as

Δp=gH/2(Pa+Pb)

define homogeneous ?

A homogeneous population is one that is made up of components or pieces that are all of the same sort; it is not heterogeneous.

Mathematics.

possessing a common quality throughout: a homogenous solid figure.

A homogeneous equation has all terms of the same degree.

when each variable is multiplied by that constant, the function of numerous variables gets multiplied by some power of that constant: x2y3 is a degree 5 homogeneous expression related to a differential equation in which a linear combination of derivatives is set to zero.

As we know, the weight of the cylinder balances the force due to pressure.

As a result, we will have

F=mg

so we have

Δpπr^2=mg

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The area of one page of a book is 500 [tex]cm^{2}[/tex] or [tex]5 m^{2}[/tex].

Area is the amount of space occupied by a two-dimensional figure. It is the quantity that measures the number of unit squares that cover the surface of a closed figure.

The formula for Area = length x breadth

From the question;

length = 20cm

breadth = 25cm

Area = 20 x 25

Area = 500 [tex]cm^{2}[/tex]

Converting the value in [tex]cm^{2}[/tex] to meters

Area = 500/100

Area =  [tex]5 m^{2}[/tex]

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The magnitude and direction of the electric field at x = 0.200 m is 762.5 N/C to the left.

The magnitude and direction of the electric field at x = 1.200 m is 334.375 N/C to the left.

The magnitude and direction of the electric field at x = - 0.200 m is 949.50 N/C to the right.

The formula to calculate the magnitude of the electric field is

E = (kQ) ÷ r²

where

If the point charge has a negative charge, the direction of the electric field goes to the point charge. But if the point charge has a positive charge, the direction of the electric field goes away from the point charge.

The problem is not complete, it should say where is the point. Using a similar problem, for the same question.

For x = 0.200 m

For x = 1.200 m

For x = - 0.200 m

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In 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.

What is force?

An object having mass changes its velocity in response to a push or pull. Force is an external agent that has the power to alter a body's resting or moving condition. It has a size and a movement.

What is distance?

The entire movement of an object, regardless of direction, is called distance. Distance can be characterized as the quantity of ground covered, regardless of the starting or finishing points of an object.

a)Work done = m*g*h

where g = acceleration of gravity = 9.8 m/s2

h = 17.1 cm = 0.171 m

So, W = 281.5*9.8*0.171 = 471.8 J

b)Total force exerted,

F = mg = 281.5*9.8 = 2758.7 N = 2.76 kN

Therefore, in 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.

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A rectangle possesses all the characteristics of a parallelogram since it has two sets of parallel sides and two pairs of opposite sides that are congruent. A rectangle is always a parallelogram because of this.

How many edges are there on a parallelepiped?

Congruent and parallel faces are found in pairs. Eight (8) vertices and twelve (12) edges make up the parallelepiped. The parallelepiped's edges can be divided into three (3) sets of four (4) edges each, where each set's edges are parallel and all have the same length. A zonohedron is the parallelepiped as well.

How many faces are there on a parallelepiped?

A parallelepiped is a six-faced, three-dimensional structure with a parallelogram-like pattern on each face. It contains 12 edges, 6 faces, and 8 vertices. Rhomboid, cuboid, and cube are all variations on the parallelepiped.

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Yes, it will produce a diffraction pattern.

a. 3.9 mm b. 1.95 mm

Explanation:

The light shined from a single slit will produce a diffraction pattern because,  the wavefront act as wavelets which generates its own wave according to Huygens principle. This therefore causes the diffraction pattern.

Given

wavelength of green light, λ = 520 nm = 520 × 10⁻⁹ m = 5.20 × 10⁻⁷ m

width of slit, d = 0.440 mm = 0.44 × 10⁻³ m = 4.4 × 10⁻⁴ m

Distance of slit from central maximum , D = 1.65 m

Distance of first minimum from central maximum, y = ?

a. The relationship between the slit width and wavelength is given by [tex} dsinθ = mλ [/tex]where d = slit width, θ = angular distance from central maximum, λ = wavelength of light and m = ±1, ±2, ±3...

The relationship between y and D is given by

Since θ is small, sinθ ≈ θ ≈ tanθ

so, dθ = mλ ⇒ θ = mλ/d = y/D

Therefore, y = mλD/d

Now, for the first minimum above the slit, m = +1 and for the first minimum below the slit, m = -1. So, y₁ =  λD/d and y₋₁ =  -λD/d. So, the width of the central maximum Δy is the difference between the first minima below and above the central maximum. So, Δy = y₁ - y₋₁ = λD/d -(-λD/d) = 2λD/d

Substituting the values from above, Δy= 2 × 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴ =  3900 × 10⁻⁶ m = 3.9 × 10⁻³ m = 3.9 mm

b. The first order fringe is the fringe located between the first minimum and the second minimum. From dsinθ = mλ and tanθ = y/D when θ is small, sinθ ≈ θ ≈ tanθ. So, y = mλD/d. Let m= 1 and m=2 be the first and second minima respectively. So,y₁ =  λD/d and y₂ =  2λD/d. The difference Δy₁ = y₂ - y₁ is the width of the first order fringe.

Therefore, Δy₁ = 2λD/d - λD/d= λD/d.

Substituting the values from above, we have

λD/d= 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴= 1.95 × 10⁻³ m = 1.95 mm

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The velocity of the block as a function of time is [tex]v(t) = - A \sqrt{\frac{k}{m}} (\: sin \: \sqrt{\frac{k}{m}} t)[/tex]

Look at the attachment to see the picture of the block. The block is attached to a spring and placed on a frictionless surface. Simple harmonic motion applies to the system. The equation of the position as a function of time for the system

x(t) = A cos ωt

There is the force of the spring in the system, according to Newton's second law

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The time taken to fire the rocket at the given thrust is 1,382.3 seconds.

The centripetal acceleration of the wheel is calculated by applying the following formula.

F = ma

where;

a = F / m

a = (100 N) / (5 x 10⁵)

a = 2 x 10⁻⁴ m/s²

The velocity of the wheel is calculated as follows;

a = v²/r

where;

v² = ar

v = √ (ar)

v = √ (2 x 10⁻⁴ x 11 )

v = 0.05 m/s

The time of motion of the motion of the rockets at the given speed is calculated as;

v = 2πr / T

T = 2πr / v

T = (2π x 11) / (0.05)

T = 1,382.3 seconds

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If a pendulum from Earth is taken to the moon, its frequency decrease, D. It will decrease because g on the moon is less than g on Earth.

The moon is significantly lighter than the Earth itself. Not only is the Moon smaller than the Earth, but it is also only about 60% as dense. As a result, the gravitational attraction on the Moon is much lower than on Earth, and a person weighs less on the Moon.

The acceleration due to gravity on the Moon's surface is approximately 1.625 m/s² which is approximately 16.6% of the acceleration due to gravity on Earth's surface, or 0.16. When a simple pendulum is taken from the earth to the moon, its pull decreases, causing the time period to increase. The value of 'g' on the moon is one-sixth that of the Earth's surface.

If a pendulum is taken from the Earth to the moon, the pendulum will have a lower frequency on the surface of the Moon as on the surface of the Earth.

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The answer related to the sinusoidal travelling wave is given below:
A. x and t
B. A and k and ω
D. Lambda = 2*pi/k
E. T = 2*pi/omega
F. v = omega/k

What is sinusoidal travelling wave?

The mathematical curve known as a sine wave, also known as a sinusoidal wave or simply a sinusoid, is described in terms of the sine trigonometric function, of which it is the graph. Both a smooth periodic function and a kind of continuous wave, it.

Independent variables can be freely changed to affect the function's value. On a function plot, the independent variables are often plotted on the horizontal axis.

x and t

The properties of a given function are set by parameters, which are constants. The amplitude, frequency, wavelength, and period of a wave are some examples of these.

A and k and ω

Think about the shape of the wave at time t=0. The wave slopes upward at x=0 and crosses the y axis. The upward-sloping y axis is crossed by the wave at the next x position, which is the wavelength (i.e., the length of one complete cycle of oscillation).

The wavelength should be expressed in terms of one or more of the supplied variables (A, k, x, t, and omega) and any necessary constants, such as pi.

lambda =  2*π/k

In terms of one or more of the provided variables (A, k, x, t, and omega) and any necessary constants, such as pi, express the period.

T =  2*π/omega

 Given variables (A, k, x, t, and omega) and any necessary constants (such as pi) should be used to express the speed of propagation.

v =  omega/k.

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The resistance of the copper wire at 80°C is r = 5.952 ohms

Given copper cable length is 1.2 km

The area of cross section given is 5 mm^2

Thus the equation for resistivity is:

p (t) = p (0) × ( 1 + a × ( change in temperature )

p(t) = 0.02 × 10^-6 × ( 1 + 0.004 × 60 )

p (t) = 2.48 × [tex]10^-^8[/tex] ohm m

r = ( p × l ) ÷ a

r = (  2.48 × [tex]10^-^8[/tex] × 1200 ) ÷ 5 × [tex]10^-^6[/tex]

r = 5.952 ohms

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Answer:

b

Explanation:

Answer:

Explanation:thx

Mercury and Venus changed in appearance throughout the year and Mars and Jupiter appeared to move backwards for some period of time are two observation not explain by geocentric model.

The Ptolemaic system frequently serves as an example of the geocentric paradigm, also referred as geocentrism, which is a discredited theory that places Earth at the center of the universe. Our Sun, Moon, stars, & planets also orbit Earth according to the majority of geocentric models.

According to Aristotle's model, the celestial planets orbit the Earth in a regular, orderly fashion, in perfect circles, and with uniform motion, neither accelerating nor decelerating.

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Answer:

B keep moving with constant velocity

Explanation:

newton's third law of motion

3 pounds of sugar were used.

Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.

How to find the amount of sugar used;

40% of sugar + 60% of salt = 20 pounds of condiments

Therefore 40% of sugar = (40/100) x 20

Sugar = 8 pounds

Therefore;

Salt = 20 - 8 pounds

Salt = 12 pounds

For sugar to make up 25% of the condiments;

Sugar = (25/100) x 20 pounds

Sugar = 5 pounds

The amount of Sugar used;

Sugar = 8 - 5 pounds

Sugar = 3 pounds

The amount of sugar used up is 3 pounds.

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