The radius of the planent venus is nearly the same as that of the earth,but its mass is only eighty percent that of the earth. If an object weighs w on the earth,what does it wiegh on venus

Answers

Answer 1

Answer:

Size, Mass and Orbit:

Whereas Earth has a mean radius of 6,371 km and a mass 5,972,370,000 quadrillion kg, Venus has a mean radius of about 6,052 km and a mass of 4,867,500,000 quadrillion kg. This means that Venus is roughly 0.9499 the size of Earth and 0.815 as massive.Apr 7, 2016

Volume: 10.8321×10 km 9.2843×10 km

Mean Radius: 6,371.0 km 6,051.8 ± 1.0 km

Gravity: 9.8 m/s2 8.87 m/s

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In a closed system, glider A with a mass of 0.40 kg and a speed of 2.00 m/s collides with glider B at rest with a mass of 1.20 kg. The two interlock and move off. What speed are they moving at?

Answers

The speed are they moving at will be 0.5 m/sec.Law of conservation of momentum is applied.

What is the law of conservation of momentum?

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of 1st gilder= 0.40 kg

(u₁) is the initial velocity = 2 m/s

(m₂) is the mass of 2nd gilder = 1.20 kg

(u₂) is the initial velocity of 2nd gilder = 0 m/s

(v) is the velocity after collision =.?

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

$\rm m_1u_1 + m_2u_2 = v(m_1 + m_2)\n\n(0.40* 0.25) + (1.2 * 0) = v * (0.40+1.20) \n\n 125 + 0 = v * (1250) * 125 \n\n \rm v= (0.8)/(1.6) \n\n \rm v= 0.5 \ m/sec$

Hence, the speed are they moving at will be 0.5 m/sec

To learn more about the law of conservation of momentum refer;

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Conservation of momentum.
m1*u1 + m2*u2 =m1*v1 + m2*v2
here u2=0 body at rest, v1=v2=v both interlock and move together
0..4*2+1.2*0 = 0.4*v+1.2*v
v= 0.8/1.6 = 0.5 m/sec

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?

Answers

Gravity is present but the rope is keeping it from falling so it may not look like it is present. By the way, air reistance is also present.

Final answer:

Gravity is present when a block hangs at rest from a piece of rope. The block remains in equilibrium, suspended by the tension in the rope which is equal and opposite to the gravitational force acting on the block.

Explanation:

In the scenario where a block hangs at rest from the ceiling by a piece of rope, gravity is indeed present. The force of gravity, often referred to as weight, acts downwards on the block. However, the block is not falling because there is an equal and opposite upward force - this is the tension in the rope. According to Newton's second law, the tension in the rope must be equal to the weight of the block for it to remain in equilibrium and not move. The tension in the rope and the gravitational force on the block are equal in magnitude but opposite in direction, which sums up to zero net force, hence the block is at rest.

Learn more about Physics of Gravity and Tension here:

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A codec ________. a. converts binary voice signals into digital signals for transmission
b. encrypts the signal
c. encodes voice sounds into analog signals for transmission
d. encodes voice sounds into digital signals for transmission

Answers

Answer:

Explanation:

A codec is used for encoding

According to the U.S. Census Bureau, in 2016, about 12.7% of the American population lived in poverty. Research demonstrates that people living in or near poverty have worse health outcomes and less access to health care than those who do not. Neighborhoods with many poor or low-income residents often have fewer resources that promote health. The lack of one resource, in particular, results in food insecurity and sometimes malnutrition. That is A) access to clean drinking water. B) preventive or needed medical care. C) grocery stores offering affordable and nutritious foods. D) recreational facilities that encourage physical activity. E

Answers

Answer:

grocery stores offering affordable and nutritious foods ( C )

Explanation:

The lack of grocery stores offering affordable and nutritious foods in particular results in food insecurity and sometimes malnutrition because people living in these areas( poor neighborhoods) under research can barely afford three ( 3 ) square meals if Nutritious foods are not sold to them at a subsidized rate in relation to how they are sold elsewhere.

The inability to afford three square healthy meals will result to malnutrition and poor health conditions among people living in these neighborhoods according to the research

What does Dependent viable meaning in science

Answers

Its the variable which you measure in an experiment. For example, you're conducting an experiment in order to find out how proportions of water affect plant growth, then, your dependent variable should be the height of the plants in the experiment.

What has to be different to allow refraction to occur?a. the medium
b. the light
c. the wave
d. the speed

Answers

a. the medium

For refraction to occur, there has to be change from one medium to another. For example rays of light would refract as the travel from air to water.

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