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
pav-90 [236]
2 years ago
7

Solve this question with explanation Best answer will be brainliest 40 points given

Physics
2 answers:
Yuliya22 [10]2 years ago
7 0

Answer:

12 km/h

Explanation:

Average Speed = Distance / Time (or rate)

Pick a point on the graph for Ian and plug in values.

For example, 20 minutes -> 4km

Hence, Average speed = 4km ÷ 20 minutes = 0.2 km/min

0.2 km/min × 60 = 12 km/h

siniylev [52]2 years ago
5 0
Ian’s average speed seems to be about 5. It looks like for every kilometer it takes 5 minutes
You might be interested in
Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. Many rotate very rapidly. S
Alja [10]

Answer:

16294 rad/s

Explanation:

Given that

M(ns) = 2M(s), where

M(s) = 1.99*10^30 kg, so that

M(ns) = 3.98*10^30 kg

Again, R(ns) = 10 km

Using the law of gravitation, the force between the Neutron star and the sun is..

F = G.M(ns).M(s) / R²(ns), where

G = 6.67*10^-11, gravitational constant

Again, centripetal force of the neutron star is given as

F = M(ns).v² / R(ns)

Recall that v = wR(ns), so that

F = M(s).w².R(ns)

For a circular motion, it's been established that the centripetal force is equal to the gravitational force, hence

F = F

G.M(ns).M(s) / R²(ns) = M(s).w².R(ns)

Making W subject of formula, we have

w = √[{G.M(ns).M(s) / R²(ns)} / {M(s).R(ns)}]

w = √[{G.M(ns)} / {R³(ns)}]

w = √[(6.67*10^-11 * 3.98*10^30) / 10000³]

w = √[2.655*10^20 / 1*10^12]

w = √(2.655*10^8)

w = 16294 rad/s

7 0
3 years ago
How does your body’s flexibility naturally change as you age?
chubhunter [2.5K]
<span>Your flexibility decreases.  But if you exercise or stretch a few times a  week you can slow down the process </span>
7 0
3 years ago
Read 2 more answers
What is the definition of the half-life of a radioactive isotope?
Illusion [34]

Answer:Half-life is the amount of time it takes for the initial mass of the isotope to decompose, by half, into other lighter atoms.

Explanation:Different radioactive isotopes have different half-lives. For example, the element technetium-99m has a half life of 6 hours. This means that is 100 kg of the element is left to decay, in 6 hours, 50kg of the mass will have changed into other elements/atoms. The half-life of uranium-238 is 4.5 billion years while that of polonium-216 is only 0.145 seconds.

5 0
2 years ago
Read 2 more answers
What is the best estimate of the frequency of the wave shown below
GrogVix [38]

Answer:

D. 2.5 Hz

Explanation:

Frequency = speed of wave / wavelength

= 335 /140 ( from graph)

= 2.4

5 0
3 years ago
A concave mirror is used as a<br> reflector ina torch light?
4vir4ik [10]

Answer:

A concave mirror is used as a torch reflector. ... When a light bulb is placed at the focus of a concave mirror reflector, the diverging light rays of the bulb are collected by the reflector. These rays are then reflected to produce a strong, parallel-sided beam of light.

Explanation:

8 0
3 years ago
Other questions:
  • Which object is least likely to allow light to pass through it?
    13·2 answers
  • A wave travels at a constant speed. How does the frequency change if the wavelength increases by a factor of 2?
    14·2 answers
  • Volume is the space occupied by a quantity of matter. <br> a.true <br> b.false
    6·2 answers
  • A concert loudspeaker suspended high off the ground emits 39 w of sound power. a small microphone with a 1.0 cm2 area is 60 m fr
    5·1 answer
  • A car enters a level, unbanked semi-circular hairpin turn of 100 m radius at a speed of 28 m/s. The coefficient of friction betw
    6·1 answer
  • What is the astronomy made of
    11·1 answer
  • Which of the following can happen to solar energy after it enters the earths atmosphere?
    6·2 answers
  • The gazelle travels 2 km in a half hour.The gazelle's average speed is:
    9·1 answer
  • How would radiation occur in space?
    12·1 answer
  • An electric drill rated at 400 W is connected to a 240V power line. How much current does it draw?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!