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Nookie1986 [14]
2 years ago
14

An object traveling at a constant

Physics
1 answer:
mel-nik [20]2 years ago
4 0

Answer:

pi / 2  radians / s

Explanation:

One revolution = 2 pi Radians    in 4 seconds

2 pi  /  4   =   pi/2   radians / s

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CORRECT ANSWER WILL BE REWARDED BRAINLIEST
Mandarinka [93]

Answer:

What is 2^-3 x 3^-2 as a fraction?

What is (-2)^-3 x (-3)^-2 as a fraction

Explanation:

I need these pls. SORRYYY

7 0
3 years ago
A satellite orbits the Earth in an elliptical orbit. At perigee its distance from the center of the Earth is 22500 km and its sp
aleksley [76]

Answer:

6.09294\times 10^{24}\ kg

Explanation:

K = Kinetic energy

v_p = Perigee speed = 4280 m/s

v_a = Apogee speed = 3990 m/s

r_p = Perigee Distance = 22500000 m

r_a = Apogee Distance = 24100000 m

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

M = Mass of Earth

m = Mass of satellite

In this system the kinetic and potential energies are conserved

K_p+P_p=K_a+P_a\\\Rightarrow \frac{1}{2}mv_p^2-\frac{GMm}{r_p}=\frac{1}{2}mv_a^2-\frac{GMm}{r_a}\\\Rightarrow \frac{1}{2}m(v_p^2-v_a^2)+GMm\left(\frac{1}{r_a}-\frac{1}{r_p}\right)=0\\\Rightarrow M=\frac{v_a^2-v_p^2}{2G}\times \left(\frac{1}{r_a}-\frac{1}{r_p}\right)^{-1}\\\Rightarrow M=\frac{3990^2-4280^2}{2\times 6.67\times 10^{-11}}\times \left(\frac{1}{24100000}-\frac{1}{22500000}\right)^{-1}\\\Rightarrow M=6.09294\times 10^{24}\ kg

The mass of the Earth is 6.09294\times 10^{24}\ kg

3 0
4 years ago
a plane is flying due east in still air at 395 km/h. suddenly, the plane is hit by wind blowing at 55km/h toward the west. what
Sphinxa [80]
Let's be clear:  The plane's "395 km/hr" is speed relative to the
air, and the wind's "55 km/hr" is speed relative to the ground.

Before the wind hits, the plane moves east at 395 km/hr relative
to both the air AND the ground.

After the wind hits, the plane still maintains the same air-speed.
That is, its velocity relative to the air is still 395 km/hr east.
But the wind vector is added to the air-speed vector, and the
plane's velocity <span>relative to the ground drops to 340 km/hr east</span>.

6 0
4 years ago
Pablo Sandoval throws a baseball with a horizontal component of velocity of 25 m/s after two seconds the ball is 40 m above the
Finger [1]

Answer:

25 ×40

l think so not sure

8 0
3 years ago
V=I/R correctly expresses the relationship between voltage, current, and resistance.
docker41 [41]
The correct answer is true
5 0
2 years ago
Read 2 more answers
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