2 years ago

What is the wavelength of a wave that has a frequency of 15HZ and a wave speed of 5 m/s?

Physics

1 answer:

stepladder [879]2 years ago

5 0

Answer:

A. .33m

Explanation:

Have a good day.

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Find the network done by friction on a box that moves in a complete circle of radius 1.82 m on a uniform horizontal floor. The c

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Answer:

C) W = - 190 J

Explanation:

Notation

Wf = work done by the friction force (unknown)

Ff = force of the friction

d = distance travelled by the box = (2 pi 1.82 m) = 11.435 m

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3 years ago

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In a shot-put competition, a shot moving at 15m/s has 450J of mechanical kinetic energy. What is the mass of the shot? Please he

Llana [10]

Answer:

Mass of shot (m) = 4 kg

Explanation:

Given:

Velocity (v) = 15 m/s

Mechanical kinetic energy (K.E) = 450 J

Find:

Mass of shot (m) = ?

Computation:

Mechanical kinetic energy (K.E) = 1/2mv²

Mechanical kinetic energy (K.E) = [1/2](m)(15)²

450 = [1/2](m)(15)²

900 = 225 m

Mass of shot (m) = 4 kg

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3 years ago

Describe the direction in which each object will accelerate. If the object won't accelerate, write "no acceleration." Explain wh

fgiga [73]

Answer:

No acceleration. All of the forces are acting equally on the paper air plane therfore It isn't going to move any where.

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3 years ago

A 1.5 kg copper block is given an initial speed of3.00m/s on a

ankoles [38]

Answer:

a. 0.01 C

b. dissipated to outside environment

Explanation:

Let the specific heat of copper be 0.3846 kJ/kg-K or 384.6 J/kg-C

(a)The original kinetic energy of the block is:

$E_k = \frac{mv^2}{2} = \frac{1.5*3^2}{2} = \frac{1.5*9}{2} = 6.75 J$

As 85% of this kinetic energy is converted to block internal heat energy, with specific heat we can calculate the rise in temperature:

$E_h = 0.85E_k = 0.85*6.75 = 5.7375 J$

$mc_c\Delta T = 5.7375$

$1.5*384.6\Delta T = 5.7375$

$\Delta T = \frac{5.7375}{1.5*384.6} \approx 0.01^oC$

(b) the remaining 15% energy would probably be dissipated to outside environment as heat energy

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3 years ago

Which of the following is not an example of acceleration?

djyliett [7]

The correct answer is C

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