What is a consumer that eats a variety of organisms

John took 0.75 hours to bicycle to his grandmother's house, a distance of 4 km. What is his velocity?

ddd [48]

Answer:

5.3Km/hr

Explanation:

Velocity=Displacement/Time

D=4km;T=0.75hr

V=4/0.75=5.33..

6 0

3 years ago

How to find resultant force?

LuckyWell [14K]

Explanation:

To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force

4 0

3 years ago

In 1940, it was discovered that uranium could be artificially changed to plutonium, a process called transmutation. What combina

coldgirl [10]

The combination of decay processes that would convert U-239 into PU- 239 is beta decay followed by another beta decay. There are two different types of beta decay (positive and negative beta decays) they both occur simultaneously in order to move the atoms towards stability.

4 0

3 years ago

17. Suppose you attach the object with mass m to a vertical spring originally at rest, and let it bounce up and down. You releas

insens350 [35]

Answer:

See below ↓

Explanation:

<u>Step 1 : Diagram</u>

In attachment

We choose the system to be the spring, the block, and the Earth and it is isolated
We put all the data in the figure we have created and create a zero level (initial height) of the block to be yₓ = 0 and the final position, when it stops and moves upwards again, to be yₙ = -A
No external forces are exerted on the system and no energy comes in or out of the system
Hence,

⇒ ΔE = 0

⇒ Eₙ - Eₓ = 0

⇒ Eₙ = Eₓ

⇒ Kₙ + Uₙ + Pₙ = Kₓ + Uₓ + Pₓ

Final kinetic energy is 0 at the lowest point

⇒ Uₙ + Pₙ = Uₓ + Pₓ

Initial potential energy is 0 [zero level = initial height]

⇒ Uₙ + Pₙ = Uₓ

And we know that spring was originally at normal length, so initial spring energy is also 0

⇒ Uₙ + Pₙ = 0

⇒ 1/2kxₙ² + mgyₙ = 0

⇒ 1/2kxₙ² = -mgyₙ

We know xₙ = A and yₙ = -A from the diagram

⇒ 1/2kA² = -mg(-A)

⇒ 1/2kA² = mgA

⇒ [1/2kA = mg]

Spring force is given by : F = -kx
Note : x = A

⇒ F = kA

⇒ k = F/A

⇒ Plug 'k' into the equation found at the end of Step 3

⇒ 1/2(F/A)(A) = mg

⇒ 2F = mg

⇒ F = 2mg (a)

We know the spring will stop oscillating and be at rest at the new equilibrium position of the system

⇒ F - mg = 0

⇒ F = mg

We know that :

⇒ F = -kx

In the case x = yₙ

⇒ kyₙ = mg

⇒ yₙ = mg/k

⇒ yₙ = 0.25 x 9.8 / -10

⇒ yₙ = -0.245 m

⇒ yₙ = A

⇒ yₙ = 0.245 m (b)

v(max) = Aω
v(max) = A√k/m
v(max) = 0.245 x √(10/0.25)
v(max) = 1.55 m/s (c)

8 0

2 years ago

A satellite of mass m circles the earth a distance R from the center of the earth.If the radius of the earth is 6.0*10^6ms.calcu

Rom4ik [11]

(a) The height above the earth's surface of the parking orbit is determined from the difference between the orbital radius and earth's radius (h = r - R).

(b) Velocity of the satellite of the earth is determined with a formula given as (2π/T)r.

<h3>Height above the earth's surface </h3>

The height above the earth's surface is calculated using the following formula;

$T = \frac{2\pi r^{\frac{3}{2} }}{\sqrt{Gm} }$

where;

T is time period of the satellite
r is orbital radius

r = h + R

h = r - R

where;

h is height above the earth's surface
R is radius of earth

<h3>Velocity of the satellite</h3>

The velocity of the satellite is determined using the formula below;

v = ωr

v = (2π/T)r

Learn more about velocity of satellite here: brainly.com/question/22247460

#SPJ1

5 0

2 years ago