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2 years ago

5. True or False: The medium moves along with a wave.

Physics

2 answers:

zheka24 [161]2 years ago

7 0

Answer:

false. the medium never moves

Explanation:

kherson [118]2 years ago

3 0

Falseeeeeeeeeeeeeeeeeeeeeee

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in the hydrologic cycle, water from the ocean _____ (condenses, precipitates, transpires,or evaporates) into the atmosphere wher

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2 years ago

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A golf ball is struck with a five iron on level ground. it lands 100.0 m away 4.60 s later. what was the magnitude and direction

finlep [7]

consider the motion in x-direction

$v_{ox}$ = initial velocity in x-direction = ?

X = horizontal distance traveled = 100 m

$a_{x}$ = acceleration along x-direction = 0 m/s²

t = time of travel = 4.60 sec

Using the equation

X = $v_{ox}$ t + (0.5) $a_{x}$ t²

100 = $v_{ox}$ (4.60)

$v_{ox}$ = 21.7 m/s

consider the motion along y-direction

$v_{oy}$ = initial velocity in y-direction = ?

Y = vertical displacement = 0 m

$a_{y}$ = acceleration along x-direction = - 9.8 m/s²

t = time of travel = 4.60 sec

Using the equation

Y = $v_{oy}$ t + (0.5) $a_{y}$ t²

0 = $v_{oy}$ (4.60) + (0.5) (- 9.8) (4.60)²

$v_{oy}$ = 22.54 m/s

initial velocity is given as

$v_{o}$ = sqrt(( $v_{ox}$ )² + ( $v_{oy}$ )²)

$v_{o}$ = sqrt((21.7)² + (22.54)²) = 31.3 m/s

direction: θ = tan⁻¹(22.54/21.7) = 46.12 deg

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3 years ago

When describing electromagnetic radiation, there is a(n) _____________ relationship between wavelength and frequency and the gre

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Its actually C. I did the question on USA test prep and it said the correct answer was C.

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2 years ago

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Consider a cloudless day on which the sun shines down across the United States. If 2073 kJ of energy reaches a square meter ( m

Mnenie [13.5K]

The total amount of energy per hour is $2.039\cdot 10^{16} kJ$

Explanation:

In this problem we are told that the amount of energy reaching a square meter in the United States per hour is

$E_1 = 2073 kJ$

The total surface area of the United States is

$A=9.834\cdot 10^6 km^2$

And converting into squared metres,

$A=9.834\cdot 10^6 \cdot 10^6 = 9.834\cdot 10^{12} m^2$

Therefore, the total energy reaching the entire United States per hour is given by:

$E=AE_1 = (9.834\cdot 10^{12})(2073)=2.039\cdot 10^{16} kJ$

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3 years ago

A 15 kg runaway grocery cart runs into a spring with spring constant 230 N/m and compresses it by 56 cm .What was the speed of t

liubo4ka [24]

To solve this problem we will apply the concepts related to the conservation of kinetic energy and elastic potential energy. Thus we will have that the kinetic energy is

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

And the potential energy is

$PE = \frac{1}{2} kx^2$

Here,

m = mass

v = Velocity

x = Displacement

k = Spring constant

There is equilibrium, then,

KE = PE

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

Our values are given as,

$x=0.56m\\k=230N/m\\m=15kg$

Replacing we have that

$\frac{1}{2} (15)v^2 = \frac{1}{2} (230)(0.56)^2$

$v = 2.19m/s$

Therefore the speed of the cart is 2.19m/s

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3 years ago