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11111nata11111 [884]

2 years ago

13

____ 65. a green laser pointer emits 532 nm light. what is the frequency of this radiation

1 answer:

creativ13 [48]2 years ago

6 0

F = c/λ = 5.64 * 10^14 Hz (3 s.f.)

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A football player threw a ball upward at an angle or 24 degrees with the horizontal with A velocity of 18 m/s. What are the vert

svet-max [94.6K]

Answer:

$V_y = 16.44\ m/s$

$V_y = 7.32\ m/s$ <em />

Explanation:

Given

$\theta = 24$

$Velocity\ (V) = 18m/s$

Required

Determine the vertical and horizontal components

The vertical (Vy) and horizontal (Vx) components is calculated as thus:

$V_x = Vcos\theta$

$V_y = Vsin\theta$

Calculating Vertical Components:

$V_y = Vsin\theta$

$V_y = 18 * sin24$

$V_y = 18 * 0.40673664307$

$V_y = 7.32125957526$

$V_y = 7.32\ m/s$ <em> --- Approximated</em>

Calculating Horizontal Components:

$V_x = Vcos\theta$

$V_x = 18 * cos24$

$V_x = 18 * 0.91354545764$

$V_x = 16.4438182375$

$V_x = 16.44\ m/s$ <em>--- Approximated</em>

4 0

2 years ago

The acceleration due to gravity on Earth is 9.81 m/s² [down]. A hockey puck was launched from the ice with a velocity of 26.9 m/

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Answer:

A hockey puck having a mass of 0.30 kg slides on the frictionless, horizontal surface of an ... magnitude of 5.0 N, and the force F2 has a magnitude of 8.0 N. Determine both ... A large man and a small boy stand facing each other on frictionless ice. They ... A hockey puck on a frozen pond is given an initial speed of 20.0 m/s.

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2 years ago

Ocean waves that measure 12m from crest to adjacent crest pass by a fixed point every 2.0s what is the speed of the waves

Darina [25.2K]

Because there is a 1.2m distance between the crest and the adjacent trough in the series.

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3 years ago

A good model of the cell membrane would be

Nonamiya [84]

B. A film of food wrap. The cell membrane is the outermost layer that is protecting the cell

6 0

2 years ago

To practice Problem-Solving Strategy 7.2 Problems Using Mechanical Energy II. The Great Sandini is a 60.0-kg circus performer wh

sp2606 [1]

Answer:

$v = 15.45 m/s$

Explanation:

As per mechanical energy conservation we can say that here since friction is present in the barrel so we will have

Work done by friction force = Loss in mechanical energy

so we will have

$W_f = (U_i + K_i) - (U_f + K_f)$

here we know that

$W_f = F_f . d$

$W_f = 40 \times 4$

$W_f = 160 J$

Initial compression in the spring is given as

$F = kx$

$4400 = 1100 x$

$x = 4 m$

now from above equation

$W_f = (\frac{1}{2}kx^2 + 0) - (mgh + \frac{1}{2}mv^2)$

$160 = (\frac{1}{2}1100(4^2) + 0) - (60 \times 9.8\times 2.50 + \frac{1}{2}(60)v^2)$

$160 = 8800 - 1470 - 30 v^2$

$v = 15.45 m/s$

3 0

2 years ago