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
aev [14]
4 years ago
13

Two planets have the same surface gravity, but planet b has twice the radius of planet

Physics
1 answer:
nevsk [136]4 years ago
8 0
The formula for the acceleration due to gravity is:

a = Gm/r²
where
G is the universal gravitational constant = 6.6726 x 10⁻¹¹ N-m²/kg²
m is the mass of planet
r is the radius of planet

So, if they have the same a:

m₁/r₁² = m₂/r₂²
So, if m₁ = m and r₂ = 2r₁,
m/r₁² = m₂/(2r₁)²
m₂ = 4m

<em>Thus, the answer is D.</em>
You might be interested in
Which of the following objects is exerting a gravitational force on the floating tool? the Earth, the Moon, the astronaut, the S
Tcecarenko [31]
All of them are correct.
4 0
3 years ago
Read 2 more answers
What is the gravitational force between two trucks, each with a masof 2.0x10^4 k
eduard

Answer:

6.67\cdot 10^{-3} N

Explanation:

The gravitational force between two objects is given by

F=G\frac{m_1 m_2}{r^2}

where

G is the gravitational constant

m1, m2 are the two masses

r is the separation between the two masses

In this problem, we have

m_1 = m_2 = 2.0 \cdot 10^4 kg the mass of each truck

r = 2.0 m is their separation

Substituting,

F=(6.67\cdot 10^{-11}) \frac{(2.0\cdot 10^4 kg)^2}{(2.0 m)^2}=6.67\cdot 10^{-3} N

7 0
4 years ago
1. Why are the speed values in the data table called "average" instead of "instantaneous"?
nata0808 [166]
Answer: Why are the speed values in Table 1 called "average" instead of "instantaneous"? The speeds are called average because they are a calculation of a course of distance divided by aduration of time. ... The average speed reduces.

HOPE IT HELPS:) HAVE A NICE DAY
4 0
4 years ago
At a speed of 60 mph, how far does your car travel in 3 seconds
Viefleur [7K]

One of the many random useless factoids that I carry around
in my head is the factoid that 60 miles per hour is equivalent
to exactly 88 feet per second.

So in three seconds at that speed, you would cover exactly

                       (3 x 88) = 264 feet.


4 0
3 years ago
A car travels along straight line for first half time with a speed of 40 km/h and the second half with a speed of 60km/h find th
Vesna [10]

Answer:

Average speed of car will be 48 km/hr  

Explanation:

Let the total distance is 2d

It is given that first half of the distance car travels with a speed of 40 km/hr

So time taken to cover half of the distance t_1=\frac{d}{40}hr

Second half of the distance is covered with a 60 km/hr

So time taken to cover second half of the distance t_2=\frac{d}{60}hr

So total time to cover 2d distance t=\frac{d}{60}+\frac{d}{40}=\frac{5d}{120}

Average speed is the ratio of total distance to total time

So average speed =\frac{2d}{\frac{5d}{120}}=48km/hr

So average speed of car will be 48 km/hr

4 0
3 years ago
Other questions:
  • Are most plants and animals single-cell organisms
    10·2 answers
  • A pipe is open at both ends. The pipe has resonant frequencies of 528 Hz and 660HZ (among others).
    13·1 answer
  • On a hot day, the temperature of a 65,000-L swimming pool increases by 1.20°C. What is the net heat transfer during this heating
    5·1 answer
  • What statement best describes the kind of change that could have taken place
    8·1 answer
  • Which graph shows uniform motion.​
    11·2 answers
  • Name means near thyroid
    5·1 answer
  • Magnitud del momento de una fuerza respecto a un punto cuando la línea de acción de la fuerza pasa por dicho punto.
    9·1 answer
  • Describe why drawing a line of best fit is useful.
    14·1 answer
  • Find the volume<br>Length = 23.5cm<br>Breadth =17cm<br>Height =2cm​
    6·1 answer
  • What is a characteristic of a gas?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!