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
SOVA2 [1]
3 years ago
6

How can a rocket be propelled forward in space where there is no air to push against?

Physics
1 answer:
pychu [463]3 years ago
3 0

Answer:

Explanation:

In space, rockets zoom around with no air to push against. ... When a rocket shoots fuel out one end, this propels the rocket forward — no air is required. NASA says this principle is easy to observe on Earth. If you stand on a skateboard and throw a bowling ball forward, that force will push you and the skateboard back.

You might be interested in
The vernal equinox marks the first day of spring. What happens on this day? The north pole is tilted toward the sun. Day and nig
Drupady [299]

Answer:

Day and night on Earth are equal.

Explanation:

Vernal means fresh or new like the spring. The vernal equinox, because it signals the beginning of spring. On this day, the Sun is exactly above the Equator and day and night are of equal length. In the northern hemisphere, the vernal equinox is around March 20 or 21 when the Sun crosses the celestial equator going north while in the southern hemisphere, the vernal equinox is around September 22 or 23 when the Sun moves south across the celestial equator.

5 0
3 years ago
An elastic band is hung on a hook and a mass is hung on the lower end of the band. When the mass is pulled downward and then rel
Svetllana [295]
<span>To get that, find the time when slope equals to 0, use the derivate theory from calculus. 
 
s = 8 cos t + 9 sin t, t ≥ 0
s' = -8 sin t + 9 cos t (this is slope)
0 = -8 sin t + 9 cos t
8 sin t = 9 cos t
tan t = 9/8
t = 48.37 seconds</span>
4 0
3 years ago
A 51.0 g stone is attached to the bottom of a vertical spring and set vibrating. If the maximum speed of the stone is 16.0 cm/s
Nina [5.8K]

Answer:

A) 32.22 N/m b) 0.0156 m c) 4 Hz

Explanation:

Using Hooke's law;

T = 2π √m/k where m is mass of the body in kg and k is the force constant of the spring N/m and T is the period of vibration in s.

M = 51 g = 51 / 1000 in kg = 0.051kg

Make k subject of the formula

T/2π = √m / k

Square both sides

T^2 / 4π^2 = m/k

Cross multiply

K = 4 π^2 * m/T^2

K = 4 * 3.142 * 3.142 * 0.051/ 0.25^2= 32.22N/m

B) using Hooke's law;

F = k e where e is the maximum displacement of the spring from equilibrium point called amplitude

F= weight of the body = mass * acceleration due to gravity = 0.051*9.81

0.5 = 32.22 * e

e = 0.5/32.22 = 0.0156 m

C) frequency is the number of cycle completed in a second = 1 / period

F = 1 / 0.25 = 4Hz

6 0
3 years ago
How does the work required to accelerate a particle from 10m/s to 20m/s compare to that required to accelerate it from 20m/s to
Stella [2.4K]

The answer is B. It is the same..... hope this helps!

7 0
3 years ago
N april 1974, steve prefontaine completed a 10-km race in a time of 27 min, 43.6 s. suppose \"pre\" was at the 7.15-km mark at a
aliya0001 [1]

solution:speed is 7.99km ,u=\frac{7990}{(25\times60)}=5.33m/s\\&#10;now let the final velocity after 60s from 7.99km is v.\\&#10;v-u =at\\v=5.33+a\times60\\  =60s+5.33\\now distance travelled during this time will be\\&#10;s_{2}=vt\\&#10;v\times103.6\\&#10;=(60a+5.33)\times103.6\\&#10;=551.84+6216am\\&#10;now total distance travelled  is \\  also\\&#10;s_{1}=ut+(\frac{1}{2})at^{2}      =5.33\times60+(0.5)9\times3600\\&#10;=1800a+319.6m\\&#10;Now the remaining time to complete rest race was\\&#10;t=(27\times60+43.6)60-60(25\times60)\\&#10;=103.6s\\Now, distance travelled during this time will be\\&#10;s_{2}=vt\\&#10;v\times103.6\\&#10;=(60a+5.33)\times103.6\\&#10;=551.84+6216am\\&#10;now total distance travelled  is \\&#10;s_{1}+s_{2}+7990=10000\\&#10;1800a+319.6+551.84+6216a=2010\\&#10;8016a=2010-871.44\\&#10;8016a=1138.56\\&#10;a=0.142m/s^2

6 0
3 years ago
Other questions:
  • Which of the following statements are true about gravity?
    10·1 answer
  • Which of the following is not in the form of waves?
    11·2 answers
  • What does the atomic number of an element represent?
    9·1 answer
  • Is acceleration directly proportional to mass, or is it inversely proportional to mass?
    11·1 answer
  • Which chemical equation represents a double replacement reaction?
    11·1 answer
  • At summer camp, the swimming course runs the length (L) of a small lake. To determine the length of the course, the camp counsel
    6·1 answer
  • What is the pH of neutral substance?
    15·1 answer
  • What does stressing an Equilibrium system mean? How is stress Applied?
    12·2 answers
  • What is a main difference between Mars and Saturn?
    9·2 answers
  • What's the toughest animal in the world
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!