All categories

4 years ago

A bird flies west with a velocity of 8 m/s . How long does it take the bird to travel a horizontal distance of 400 meters ?

Physics

1 answer:

Ahat [919]4 years ago

3 0

The time taken is 50 s

Explanation:

For a body moving in uniform motion (= at constant velocity), the velocity of the body is given by:

$v=\frac{d}{t}$

where

v is the velocity

d is the distance covered

t is the time taken

In this problem, we have a bird travelling with uniform motion. We know that:

v = 8 m/s is the velocity of the bird

d = 400 m is the distance travelled

Solving for t, we find the time the bird needs to cover this distance:

$t=\frac{d}{v}=\frac{400}{8}=50 s$

Learn more about velocity:

brainly.com/question/8893949

brainly.com/question/5063905

#LearnwithBrainly

You might be interested in

A 3.0 \Omega Ω resistor is connected in parallel to a 6.0 \Omega Ω resistor, and the combination is connected in series with a 4

GarryVolchara [31]

Answer:

The power dissipated in the 3 Ω resistor is P= 5.3watts.

Explanation:

After combine the 3 and 6 Ω resistor in parallel, we have an 2 Ω and a 4 Ω resistor in series.

The resultating resistor is of Req=6Ω.

I= V/Req

I= 2A

the parallel resistors have a potential drop of Vparallel=4 volts.

I(3Ω) = Vparallel/R(3Ω)

I(3Ω)= 1.33A

P= I(3Ω)² * R(3Ω)

P= 5.3 Watts

7 0

4 years ago

The Sun and other stars orbit Earth.

ratelena [41]

What is the question?

7 0

3 years ago

Two astronauts on opposite ends of a spaceship are comparing lunches. One has an apple, the other has an orange. They decide to

german

Answer: v= 1.23 m/s θ = 75.3º

Explanation:

First of all, we define the direction in which both fruits are tossed as the x axis, so all initial momenta have horizontal components only.

Now, if no external forces act during collision (due to the infinitesimal time during which collision takes place) momentum must be conserved.

As momentum is a vector, both components must be conserved, so we can write the following equations:

p₁ₓ = p₂ₓ ⇒ -m₁ . vi₁ +m₂. vi₂ = m₁ . vf₁ . cos θ (1)

p₁y = p₂y ⇒ 0 =m₂ . vf₂ - m₁. vf₁. sin θ (2)

Replacing by the values of m1, m₂, vi₁, vi₂, and vf₂, we can calculate the value of the angle θ, that the apple forms with the horizontal, as follows:

(1) -0.13 Kg. 1.05 m/s + 0.15 Kg. 1.18 m/s = 0.13. vf . cos θ

(2) 0.15 Kg. 1.03 m/s = 0.13 vf. sin θ

sin θ / cos θ = 3.82 ⇒ tg θ = 3.82 ⇒ θ = arc tg (3.82) = 75.3º

Replacing this value of θ in (2), we get:

0.15 kg. 1.03 m/s = 0.13 vf . sin 75.3º = 0.13 . vf . 0.967

Solving for vf, we get:

vf = 0.15 kg. 1.03 m/s / 0.13. 0.967 = 1.23 m/s

5 0

3 years ago

Osmium (os) is the densest element known (density = 22.57 g/cm3). Calculate the mass in pounds and in kilograms of an os sphere

Rufina [12.5K]

<u>Answer:</u>

Mass in kg = 39.88

Mass in pounds = 87.92

<u>Explanation:</u>

We have the expression for Density, ρ = Mass / Volume, in this case density is given and we need to find mass and volume.

Volume of a sphere, we have the expression $V = \frac{4}{3} \pi r^3$ , where r is the radius of sphere.

Radius of sphere, r = Half of diameter = 15/2 = 7.5 cm

So $V = \frac{4}{3}* \pi* 7.5^3 = 1767.15 cm^3$

Mass = Volume * Density = 1767.15*22.57 = 39884.49 g

Mass in kg = 39884.49/1000 = 39.88 kg

Mass in pounds = 39.88*2.205 = 87.92 lb

4 0

3 years ago

An aerosol can of air freshener is sprayed into a room. what happens to the pressure of the gas if it's temperature stays consta

andrezito [222]

We can use the equation of state for an ideal gas to answer the question:
$pV=nRT$
or, by rewriting it,
$p= \frac{nRT}{V}$
where p is the gas pressure, V its volume, T its temperature, n the number of moles of the gas and R the gas constant.

When the gas is sprayed from the can into the room, its volume V has increased, while n (the number of moles of the gas) stayed the same. Since R is a constant and the temperature T also stayed constant, if we look at the formula we see that the numerator didn't change, while the denominator (V) has increased, so the pressure of the gas has decreased.

7 0

3 years ago