1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
leva [86]
3 years ago
7

The star Betelgeuse is about 600 light-years away. If it explodes tonight,

Physics
2 answers:
lana [24]3 years ago
6 0

The star Betelgeuse is about 600 light-years away.

If it explodes tonight, we won't know about it until 600 years from now. <em>(C)</em>

(Maybe it already has.  If it exploded any time after the year 1419, we have no way to know it yet.)

Thepotemich [5.8K]3 years ago
4 0

Answer:

C

Explanation:

It has to travel 600 light years before we would be able to observe the explosion.

You might be interested in
A guitar vibrates in frequency with a tuning fork when the fork is held against its body. This is a case of
Butoxors [25]
Energy transfer the energy from the tuning fork is being transferred to the guitar<span />
4 0
3 years ago
Calculate the displacement of a motorcycle that accelerates forward from rest to 7.0 m/s in 3.5 s.
Harrizon [31]

Answer:

12.25 meters

Explanation:

s=1/2(v+u)t

s= displacement

v= final velocity

u= initial velocity

t= time

7m/s+0m/s divide by 2= 3.5 m/s velocity  Times 3.5 seconds=  12.25 meters

3 0
3 years ago
Show work/ no links
ryzh [129]
7) p=w/t
2620/0.2
=13100W

8) W=pt
40*30
=1200 J

9) transformed
7 0
3 years ago
Norma kicks a soccer ball with an initial velocity of 10.0 meters per second at an angle of 30.0°.
amm1812

Answer: 30

Explanation:

7 0
2 years ago
Read 2 more answers
A landing craft with mass 1.21×104 kg is in a circular orbit a distance 5.90×105 m above the surface of a planet. The period of
creativ13 [48]

Answer:

  W = 661.6 N

Explanation:

The weight of a body is the force of attraction of the plant on the body, so we must use the law of gravitational attraction

       F = G m M / r²

Where G is the gravitational attraction constant that values ​​6.67 10-11 N m² / kg², M is the mass of the planet and r is the distance from the center of the planet.

Let's look for the mass of the planet, for this we write Newton's second law for the landing craft

     F = m a

Acceleration is centripetal a = v² / r

     G m M / r² = m (v² / r)

The ship rotates rapidly (constant velocity module), let's use uniform kinematic relationships

    v = d / t

The distance of a circle is

    d = 2π r

    v = 2π r / t

We replace

     G m M / r² = m (4π² r² / t² r)

    G M = 4 π² r³ / t²

    M = 4π² r³ / G t²

The measured distance r from the center of the plant is

     r = R orbit + R planet

     r = 5.90 10⁵ + ½ 9.80 10⁶

     r = 5.49 10⁶ m

    M = 4 π² (5.49 10⁶)³ / (6.67 10⁻¹¹ (5.900 10³)²)

    M = 6,532 10²¹ / 2,321 10⁺³

    M = 2.814 10²⁴ kg

With this data we calculate the astronaut's weight

     W = (G M / R²) m

     W = (6.67 10⁻¹¹ 2,816 10²⁴ /(4.90 10⁶)2)   84.6

     W = 7.82  84.6

     W = 661.57 N

3 0
3 years ago
Other questions:
  • A small dog is trained to jump straight up a distance of 1.2m. How much kinetic energy does the 7.2kg dog need to jump this high
    6·2 answers
  • for any object suspended by any number of ropes, wires, or chains, how is the total amount of tension (tension in each rope adde
    6·1 answer
  • A spherical balloon has a radius of 6.95m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of ai
    11·1 answer
  • For a short time the missile moves along the parabolic path y=(18−2x2) km. If motion along the ground is measured as x=(4t−3) km
    6·1 answer
  • Why scientifically died it hurt when you stub your toe in the corner of a wall?
    7·1 answer
  • A student's pencil rolls off a desk and lands 0.47 m away from the edge of the
    15·1 answer
  • A ball has a diameter of 3.79 cm and average density of 0.0838 g/cm3.
    11·1 answer
  • Which of these is a TRUE statement? A) Sound travels through gases easier than liquids. B) Sound travels through solids easier t
    14·2 answers
  • Your film idea is about drones that take over the world. In the script, two drones are flying horizontally at the same speed and
    11·1 answer
  • How much kinetic energy does an 80 kg man have while running at 3 m/s?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!