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4 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Physics

2 answers:

wel4 years ago

7 0

Answer: Up and down

Explanation :

The waves that require a medium to travel through are mechanical waves. There are two types of mechanical waves.

Longitudinal waves
Transverse waves

The given figure shows a transverse wave in which the particles of the medium move up and down to the direction of propagation of waves i.e. the medium particles are perpendicular in the direction of motion of waves.

The uppermost portion of waves is called crest while the lowermost portion is a trough.

Hence, the correct option is (C).

vitfil [10]4 years ago

3 0

Up and down, diagonally, anything that's ACROSS the direction the wave is moving.

Just NOT back and forth along the line the wave is moving.

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A person exerts a 19-N force on a cart attached to a spring and holds the cart steady. The cart is displaced 0.060 m from its eq

Mariana [72]

To solve this problem, apply the concepts related to Hooke's law. From there we will find the spring constant. Subsequently, applying Energy balance, which includes gravitational potential energy, elastic potential energy and kinetic energy, we will bury the system's energy. Finally, using the displacement expression for the simple harmonic movement, we will find the expression that describes the system.

PART A) The expression for the spring force is

$F=kx$

Here,

k = Spring constant

x = Displacement

Rearranging to find the spring constant we have that

$k = \frac{F}{x}$

$k = \frac{19}{0.06}$

$k = 316.66N/m \approx 320N/m$

PART B ) The gravitational potential energy acts on the spring holds the cart is zero. Since cart is placed in the equilibrium position. The kinetic energy of the cart is zero. Therefore the expression for the total energy is,

$E = (PE)_g+(PE)_{spring}+KE$

$E = 0+\frac{1}{2} kx^2+0$

$E = \frac{1}{2} (316.66N/m)(0.06)^2$

$E = 0.569J \approx 0.57J$

PART C) The expression for the angular frequency is

$\omega = 2\pi f$

$\omega = 2\pi (1Hz)$

$\omega = 2\pi rad/s$

The equation for the motion of the cart is

$x(t)= Acos(\omega t)$

Replacing,

$x(t) = 0.06 cos (2\pi t)$

5 0

3 years ago

What fraction of the space within the atom is occupied by the nucleus?

ValentinkaMS [17]

Answer:

Approximately 6.8 x 10⁻¹⁵

Explanation:

To be able to get this fraction, there are some things we need to know.

1. The radius of nucleus = 1.0 x 10⁻¹³ cm

2. The radius of hydrogen atom = 52.9 pm

3. Volume of sphere = V1/V2 = (R1/R2)^3

4. 1 picometer (pm) = 10^-10 cm

CHECK ATTACHMENT FOR Step by step solution to the answer

3 0

3 years ago

Concept map for kinetic energy, work and power

Helen [10]

Kinetic energy: the energy of motion

Work: the change in kinetic energy

Power: the rate of work done

Explanation:

The kinetic energy of an object is the energy possessed by the object due to its motion. Mathematically, it is given by:

$K=\frac{1}{2}mv^2$

where

m is the mass of the object

v is its speed

The work done an object is the amount of energy transferred; according to the energy-work theorem, it is equal to the change in kinetic energy of an object:

$W=K_f - K_i$

where

$K_f$ is the final kinetic energy

$K_i$ is the initial kinetic energy

Finally, the power is the rate of work done per unit time. Mathematically, ti can be expressed as

$P=\frac{W}{t}$

where

W is the work done

t is the time elapsed

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8 0

4 years ago

A car traveling at 40 m/s starts to decelerate steadily. It comes to a complete stop in 5 seconds. What is its acceleration? m/s

SCORPION-xisa [38]

Acceleration =

   (change of speed) / (time for the change).

Change of speed = (speed at the end) - (speed at the beginning)

      =    ( zero ) - (40 m/s)

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Acceleration = (-40 m/s) / (5 seconds)

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8 0

3 years ago

Let y be the height of the coffee in the funnel at any given time, so that just before the dripping starts we have y = 3. Since

pishuonlain [190]

Answer: y will change the slowest but still with a zero (0) value.

Explanation: at y = 3: the height y will change the slowest when the coffee level is at the top of the cone.

7 0

3 years ago