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1 year ago

Which is the best definition of

Physics

2 answers:

Alex Ar [27]1 year ago

7 0

Answer:

I think it C

Explanation:

Because is the most reasonable one and makes a lot of scenes

Elenna [48]1 year ago

4 0

The answer is C
I hope this helps

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While standing on an open bed of a truck moving at 35 m/s, an archer sees a duck flying directly overhead. The archer shoots an

pashok25 [27]

Answer:

Part a)

$t = 20 s$

Part b)

$x = 700 m$

Part c)

Since horizontal speed of truck and the arrow is same so the arrow will strike at the position of the archer as they both moving with same speed

Explanation:

Part a)

As we know that the arrow moves with uniform acceleration in vertical direction so we can use kinematics in Y direction

Here we know that

$\Delta y = v_y t + \frac{1}{2}at^2$

since the arrow lands at the same height so its vertical displacement of whole motion is zero

so we will have

$0 = 98 t - \frac{1}{2}(9.8) t^2$

$0 = 98 t - 4.9 t^2$

$t = 20 s$

Part b)

Horizontal distance moved by the arrow

$x = v_x t$

here horizontal speed of arrow is same as that of speed of truck

so we will have

$x = 35 \times 20$

$x = 700 m$

Part c)

Since horizontal speed of truck and the arrow is same so the arrow will strike at the position of the archer as they both moving with same speed

6 0

3 years ago

Which describes the energy transformations for a radio?

11111nata11111 [884]

A electrical to sound

5 0

4 years ago

Read 2 more answers

An object is dropped from rest from a height of 4.4 107 m above the surface of the Earth. If there is no air resistance, what is

kondaur [170]

Answer:

Explanation:

An object is drop from a height, then it is in direction of gravity

g is +ve

When an object drop from a height, the initial velocity is 0,

U=0

Given that h=4.4×10^7m

V=?

g=9.81m/s^2

Then using equation of motion

V^2=U^2+2gh

V^2=0+2×9.81×4.4×10^7

V^2=86.33×10^7m/s

Take square root of both side

V=29381.63m/s

Now to km/s, divide by 1000

Since 1km=1000m

V=29.38km/s

6 0

3 years ago

Audible wavelengths. the range of audible frequencies is from about 20.0 hz to 2.00×104 hz . what is range of the wavelengths of

BabaBlast [244]

Given:
f1 = 20 Hz
f2 = 20000 Hz
speed of sound at 20 degrees celcius = 343 m/s

Solution:

for f1 = 20 Hz,

Using the equation:

lambda = speed of sound / f1 = 343 / 20 = 17.15 m

For f2:

lambda = speed of sound / f2 = 343 / 20000 = 0.01775 m

Therefore the wavelength range of audible sound in air would be 17.15 m to 0.01775 m.

6 0

3 years ago

Read 2 more answers

A spring has a force constant k, and an object of mass m is suspended from it. The spring is cut in half and the same object is

kenny6666 [7]

Answer:

$f2/f1 = \sqrt{2}$