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myrzilka [38]
4 years ago
12

Astronauts traveling toward Earth in a fastmoving

Physics
1 answer:
cluponka [151]4 years ago
7 0
Compared to the frequency and wavelength of the radio signal emitted from
the antenna, the radio signal received by the astronauts has a (<span>1) lower frequency and a shorter wavelength.</span>
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A particle moves in a velocity field V(x, y) = x2, x + y2 . If it is at position (x, y) = (7, 2) at time t = 3, estimate its loc
MArishka [77]

Answer:

New location at time 3.01 is given by: (7.49, 2.11)

Explanation:

Let's start by understanding what is the particle's velocity (in component form) in that velocity field at time 3:

V_x=x^2=7^2=49\\V_y=x+y^2=7+2^2=11

With such velocities in the x direction and in the y-direction respectively, we can find the displacement in x and y at a time 0.01 units later by using the formula:

distance=v\,*\, t

distance_x=49\,(0.01)=0.49\\distance_y=11\,(0.01)=0.11

Therefore, adding these displacements in component form to the original particle's position, we get:

New position: (7 + 0.49, 2 + 0.11) = (7.49, 2.11)

6 0
3 years ago
A 0.8 kg object displaces 500 mL of water. What is its specific gravity?
Airida [17]
The specific gravity is how the density of the object compares to the density of water. Water's density is 1gram per milliliter. We just need to figure out the density of the object.

The object is .8 kg and it displaces 500mL of water, so the density is the mass divided by the volume. Since the density of water is given in grams, we have to convert the objects mass from kg to g and then we can get the density.

.8kg * 1000g/kg = 800 grams

So

800g/500ml = 1.6grams/mL this is the density.

So divide the density of your object by the density of water, which is 1g/mL, you get 1.6 as the specific gravity. This means the object is 1.6 times more dense than water.
8 0
4 years ago
Includes the speed of an object and the direction of its motion
Yanka [14]

Question

what Includes the speed of an object and the direction of its motion

Answer:

Hi, There!

Im 100% Sure your Answer is Velocity! Velocity is a measure of how fast something moves in a particular direction. To define it needs both magnitude and direction.

Hope this helps!!

-FrozenVines-

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3 years ago
Mike rides his horse with a constant speed of 20 km/h. How far can he travel in 4 hours?
gizmo_the_mogwai [7]

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Mike can travel 80 Km in 4 hours

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3 years ago
A substance burns in the presence of oxygen.
valina [46]
If I don’t know a answer I put C bc it is a 50/50 chance but it might be wrong
5 0
3 years ago
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