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alexandr1967 [171]
3 years ago
15

Why might a scientist want to use a model to study the solar system? O A. Its extreme simplicity makes it difficult to see patte

rns in observations. B. Its extremely slow movement makes it difficult to see the motions of different planets. C. Its extremely large size makes it difficult to see all of its parts at the same time. D. Its extremely small size makes it difficult to see planets that are far away​
Physics
2 answers:
ivanzaharov [21]3 years ago
8 0

Answer:

B

Explanation:

igomit [66]3 years ago
3 0

Answer:

C

Explanation:

I’m right just trust

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A person is driving down a country lane at 25 m/s, when a deer suddenly jumps in front of the car. The deer is 75 m ahead and wh
lions [1.4K]

We can use the equation for Newtons third law.

fv² - iv² = 2as

Variables:

fv = final velocity (0)

iv = inital velocity (25)

s = distance traveled (?)

a = acceleration (-4.2)

We are given all variables except "s".

Solve for s:

fv² - iv² = 2as

0² - 25² = 2(-4.2)s

625 = -8.4s

74.4 ≈ s

Since 74.4 < 75, the car does not hit the deer.

Best of Luck!

4 0
3 years ago
Read 2 more answers
A dumbbell-shaped object is composed by two equal masses, m, connected by a rod of negligible mass and length r. If I_1 is the m
Paraphin [41]

Answer:

I2>I1

Explanation:

This problem can be solved by using the parallel axis theorem. If the axis of rotation of a rigid body (with moment of inertia I1 at its center of mass) is changed, then, the new moment of inertia is gven by:

I_2=I_{1}+Md^2

where M is the mass of the object and d is the distance of the new axis to the axis of the center of mass.

It is clear that I2 is greater than I1 by the contribution of the term Md^2.

I2>I1

hope this helps!!

8 0
3 years ago
Someone please help me! And I will mark you as brainlist!!
Ronch [10]

Answer:

1. G.P.E = 24 J

2. center of mass

Explanation:

Given the following data;

Mass = 2kg

Height, h = 1.2m

Acceleration due to gravity = 9.8 N/kg or m/s².

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

G.P.E = mgh

Where;

  • G.P.E represents potential energy measured in Joules.
  • m represents the mass of an object.
  • g represents acceleration due to gravity measured in meters per seconds square.
  • h represents the height measured in meters.

Substituting into the formula, we have;

G.P.E = 2*1.2*9.8

G.P.E = 23.52 to 2 S.F = 24 Joules.

Translation kinetic energy is defined as the energy of a system due to the motion of the system’s center of mass. The center of mass is typically where the mass of the object or particle is concentrated.

6 0
3 years ago
Nancy immediately remembers she had promised to return her grandmother's call from earlier this morning. What type of memory is
Solnce55 [7]
I believe its Procedural Memory
6 0
3 years ago
A small car and a large heavier bus are traveling at the same speed. Which has more momentum?
lions [1.4K]

Answer:

small car since they weigh less than a bus

Explanation:

7 0
3 years ago
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