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3 years ago

An object in motion will have a speed which is a scaler , or ( blank ) which is a vector .

Physics

1 answer:

mylen [45]3 years ago

3 0

Answer:

Velocity

Explanation:

Objects in motion usually have a speed which is scalar or velocity which is a vector.

A scalar quantity is one with magnitude but has no directional attribute.

A vector quantity is one with both magnitude and directional attribute.

Speed is a scalar quantity that describes the magnitude of motion a body accrues.

Velocity is a vector quantity that describes both the magnitude of motion and the direction of motion in a body.

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A student gathered two boxes of the same size made of different materials: glass and clear plastic. She placed them on a windows

Aleks04 [339]

The temperature in the boxes

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3 years ago

Metabolic power is the rate at which your body "burns" fuel to power your activities. For many activities, your body is roughly

DerKrebs [107]

Answer:

Metabolic power 420.138 W

Explanation:

Given data:

considering drag coefficient Cd = 0.9

Assuming cross section of cyclist A = 0.50 m^2

Take density of air ρ = 1.2 kg/m3

We know that drag force is given as

$Drag\ Force = Cd\times 1/2 \times \rho AV^2
$

$D = 0.9\times 1/2\times 1.2\times 0.5\times 7.3^2
$

D = 14.388 N

$Power = D\times V = 14.388\times 7.3 = 105.03 W$

hence metabolic power is given as

Metabolic power $= \frac{D}{\eta}$

$= \frac{105.03}{0.25}$

= 420.138 W

7 0

3 years ago

Marbles rolling down The ramp and horizontally of your desk and assistant land 70 cm from the base of your desk. Your desk and 7

Amiraneli [1.4K]

Answer:

6.39 meters

Explanation:

t=sqrt(2d/g)

convert cm to m...... t=sqrt(2*0.73/9.81)...... t=0.1488 seconds

v=d/t...... v=0.70/0.1488....... v=4.7m/s

Now, the new time out the window is t=sqrt(2*6.68/9.81)..... t=1.36 seconds

d=vt....... d=(4.7)*(1.36)...... d=6.39 meters!

4 0

3 years ago

What is the distance fallen for a freely falling object 1 s after being dropped from a rest position? What is the distance for a

kondor19780726 [428]

<h2>Distance traveled in 1 second after drop is 4.9 m</h2><h2>Distance traveled in 4 seconds after drop is 78.4 m</h2>

Explanation:

We have s = ut + 0.5at²

For a free falling object initial velocity u = 0 m/s and acceleration due to gravity, g = 9.8 m/s²

Substituting

s = 0 x t + 0.5 x 9.8 x t²

s = 4.9t²

We need to find distance traveled in 1 s and 4 s

Distance traveled in 1 second

s = 4.9 x 1² = 4.9 m

Distance traveled in 4 seconds

s = 4.9 x 4² = 78.4 m

Distance traveled in 1 second after drop = 4.9 m

Distance traveled in 4 seconds after drop = 78.4 m

5 0

3 years ago

Which two energy transformations are shown in the photo?

Alex777 [14]

Answer:

B. Chemical energy -> Thermal energy

Explanation:

the candle burning is a chemical reaction where the fire is using the oxygen in the air and the chemicals in the wick and it ends with giving off thermal energy. thermal energy is heat energy.

(this might not be right, i'm 95% sure it is though)

7 0

3 years ago