All categories

3 years ago

Three-fourths of the elements on the

Physics

1 answer:

77julia77 [94]3 years ago

8 0

Answer:

Explanation:

because the metalloids are the thing in the middle

You might be interested in

What event was seen as a symbol of the gradual relationship improvements between the United States and the Soviet Union as the C

Olegator [25]

Answer:

I think the answer is b but i cannot confirm cuz this is a challenging question

4 0

3 years ago

You watch a distant lady driving nails into her front porch at a regular rate of 1 stroke per second. You hear the sound of the

Igoryamba

Answer:

λ = 1360 m

Explanation:

Given data:

frequency of driving nails is given as 1 stroke per second mean at every 0.25 sec she hit the nails

speed of sound is given as 340 m/s

we know that the wave equation is given as

Speed = frequency × wavelength,

v = f × λ

where,

v = speed in meters/second (m/s)

f = frequency in Hertz (Hz)

substituing value to get wavelength of her driving nails

$340 m/s = (1Hz)\times \lambda$

$\lambda = \frac{340}{0.25}$

λ = 1360 m

4 0

3 years ago

Read 2 more answers

An airplane pilot sets a compass course due west and maintains a speed of 220 km/h. after flying for a half hour she finds herse

timurjin [86]

The net speed due west is = distance traveled in west / time taken = 120/0.5 = 240 km/h.

so airspeed due west is = net speed - speed of plane = 240-220= 20 km/h.

airspeed due south is = distance traveled in west / time taken= 20/0.5= 40 km/h.

the magnitude of the wind velocity = √[(airspeed due south )² + (airspeed due west)²] = √ ( 40^2 + 20^2 ) = 44.72 km/h

the angle of airspeed south of west is tan⁻¹ ( airspeed due south / airspeed due west )= tan⁻¹(40/20)=63.43 degrees.

if wind velocity is 40 km/h due south, her velocity should have 20 km/h component in north.

so component west = sqrt ( 220^2 - 40^2 ) = 216.33 km/h.

the angle north of west is arctan( 40/216.33 ) = 10.47 degrees.

5 0

3 years ago

Read 2 more answers

For a charged particle, a constant magnetic field can be used to change

Leona [35]

The direction of motion of the charge

5 0

3 years ago

PLEASE HELP ASAP

77julia77 [94]

Answer:

<em>The first choice (32m/s) is the closest to the answer</em>

Explanation:

The magnitude of a vector is the distance between the initial and the end point of the vector.

Being Vx and Vy the horizontal and vertical components of the vector V respectively, the magnitude of V is calculated as:

$\mid \vec{V} \mid =\sqrt{V_x^2+V_y^2}$

The components of the velocity of the physics student's projectile launcher are Vx=28 m/s and Vy=15 m/s.

Calculate the magnitude of the velocity:

$\mid \vec{V} \mid =\sqrt{28^2+15^2}$

$\mid \vec{V} \mid =\sqrt{784+225}$

$\mid \vec{V} \mid =\sqrt{1009}$

$\mid \vec{V} \mid =31.8 \ m/s$

The first choice (32m/s) is the closest to the answer

8 0

3 years ago