3 years ago

What is sin(77)? Α. 0.77 Β. 4.33 Ο Ο Ο C. 0.22 Ο D. 0.97

Physics

2 answers:

vivado [14]3 years ago

5 0

The correct answer is D. 0.97

Vilka [71]3 years ago

3 0

Answer:

0.97 id the correct answer

Explanation:

You might be interested in

A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with

beks73 [17]

Answer:

4.6 kHz

Explanation:

The formula for the Doppler effect allows us to find the frequency of the reflected wave:

$f'=(\frac{v}{v-v_s})f$

where

f is the original frequency of the sound

v is the speed of sound

vs is the speed of the wave source

In this problem, we have

f = 41.2 kHz

v = 330 m/s

vs = 33.0 m/s

Therefore, if we substitute in the equation we find the frequency of the reflected wave:

$f'=(\frac{330 m/s}{330 m/s-33.0 m/s})(41.2 kHz)=45.8 kHz$

And the frequency of the beats is equal to the difference between the frequency of the reflected wave and the original frequency:

$f_B = |f'-f|=|45.8 kHz-41.2 kHz|=4.6 kHz$

6 0

3 years ago

Read 2 more answers

Express 0.0097 in scientific notation

Maru [420]

Explanation:

Move the decimal point until it is behind the first non-zero digit.

In this case, we move it 3 places to the right so it is behind the 9.

Therefore, 0.0097 = 9.7×10⁻³.

3 0

4 years ago

Which latitude receives the most direct rays of the sun year round

Pie

Zero latitude gets the most direct sun all year around. That's the equator.

The picture you attached has nothing to do with this question.

8 0

3 years ago

A pitcher throws a baseball towards home plate. The baseball, which has a mass of 142 g, approaches the plate with 128 J of kine

mylen [45]

Mass=142g
K.E=128 J
Speed or Velocity=?
K.E=1/2*m*v^2
128=1/2*142*v^2
128=72*v^2
v^2=128/72
v^2=1.777
by taking square rt
v= 1.333ms-1
so the speed will be 1.333 ms-1

5 0

3 years ago

A projectile is launched horizontally at a speed of 30m/s from a 100m tall building. how much time it will take to reach the gro

Olegator [25]

Answer:

3.3 seconds I believe

Explanation:

6 0

3 years ago