Which of these are terrestrial planets? Select all that apply.a. Mars
b. Earth
c. Venus
d. Jupiter E. Mercury F. Neptune

Answers

Answer 1

Answer: The answers to the question above would be letters a, b, c, and d. The terrestrial planets are those that are close to the sun, namely, Mercury, Venus, Earth, and Mars. The others are known as the gas giants since they have a thick atmosphere and are considerably cold.

Answer 2

Answer:

Answer:

a. Mars

b. Earth

c. Venus

Explanation:

Terrestrial planets are defined as planets which are formed by silicate. An important characteristic is that these planets have a solid surface. On the other hand, there are gaseous planets, which are bigger and more separated of the Sun.

In our Solar system, there are 4 terrestrial planets, which are Mercury, Venus, Earth, and Mars. Notice that they are the inner planets of the system.

So, in this case, the right chice is a. Mars, b. Earth and c. Venus. All three are terrestrial planets, that is, they have a rock solid surface.

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What is uniform acceleration

Answers

Answer:

It means zero acceleration.

Explanation:

When a body moves with constant velocity then it is said to be there is no rate of change of velocity takes place because it is constant. So the acceleration becomes zero or uniform acceleration.

Two 0.006 Kg bullets are fired with speeds of 20.0 m/s and 50.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the difference of their kinetic energies?

Answers

Answer:

a) Kinetic energies

K₁ = 1.2 J

K₂ = 7.5 J

b) The bullet that has the highest kinetic energy is the one with the highest speed , v = 50 m/s , K₂ = 7.5 J

c) K₂ -K₁ = 6.3 J

Explanation:

The kinetic energy (K) is that due to the movement of a body and is calculated as follows:

K = (1/2) m*v² (J)

Where :

m : the mass of the body ( kg)

v is the speed of the body (m/s)

Data

m₁ = m₂ = 0.006 Kg

v₁ = 20 m/s

v₂ = 50 m/s

a)Calculation of the kinetic energy

K₁ = (1/2) (m₁)*(v₁)²

K₁ = (1/2) (0.006)*(20)²

K₁ = 1.2 J

K₂= (1/2) (m₂)*(v₂)²

K₂ = (1/2) (0.006)*(50)²

K₂ = 7.5 J

b) K₂ ˃ K₁

The bullet that has the highest kinetic energy is the one with the highest speed , v = 50 m/s, K₂ = 7.5 J

c) Difference of their kinetic energies (K₂ -K₁)

K₂ -K₁ = 7.5 J - 1.2 J = 6,3 J

Which term defines the process of a wave bouncing off of a surface?a. reflection
b. refraction
c. destructive interference
d. constructive interference

Answers

the answer to that question is reflection

A hypothesis is a lucky guess. True or False. . . Question 2.2. The conclusion of a study should always be that the hypothesis is correct. True. or False Question 3.3. Which variable is measured in an experiment? a. independent variable. b.dependent variable c.experimental variable. . . Question 4.4. Most scientists come up with questions to investigate out of the blue. True. or False

Answers

The answer for the first is False, it is not based on luck but on previously conducted research or previous studies. The second one is also False. Even not proving a hypothesis can help science because then future researches know what is not true and can create new hypotheses based on that. The third one is C. experimental variable. That's when everything is the same except for that one which makes it an experiment. The last one is also false. The questions are usually based on previous research that was studied, read, or similar.

The person who answered them all one of them is incorrect the rest are right. But the one about "Which variable is measured in an experiment?" The answer is dependent variable.

Calculate the average power required to lift a 490 Newton object of vertical distance of 2 m in 10 seconds

Answers

   Power = (work done) / (time to do the work)

   Work = (force) x (distance)

If you want to lift a 490N object, you'll need (at least) 490N of force.
So, when you lift it 2 meters vertically, the work you do is

   Work = (490 N) x (2 m) = 980 joules
and
   Power = (980 joules) / (10 sec) = 98 watts .

Poise under pressure, dealing with adversity, and self-esteem are all parts of which type of health? A. emotional health B. mental heal C. physical health D. social health

Answers

Answer:

The correct answer is option B, Mental Health

Explanation:

Mental health is referred to as mental illness when a person is bounded by prolonged negative thoughts. The ongoing signs and symptoms of a poor mental health can cause frequent stress and reduced ability to function. Some common symptoms of mental illness include

• Excessive anger, hostility or violence

• Extreme mood changes

• Confused thinking or reduced ability to concentrate

• Excessive fears or worries

The answer is B.) Mental health

Other Questions

When a substance changes from any state of matter to another it is calleda. sublimation. b. condensation. c. absolute zero. d. a phase change.

Two flywheels of negligible mass and different radii are bonded together and rotate about a common axis (see below). The smaller flywheel of radius 13 cm has a cord that has a pulling force of 50 N on it. What pulling force (in N) needs to be applied to the cord connecting the larger flywheel of radius 22 cm such that the combination does not rotate?

C=ne 0.045=n *1.6*10^-19

An object is thrown horizontally from the open window of a building. If the initial speed of the object is 20 m/s and it hits the ground 2.0 s later, from what height was it thrown? (Neglect air resistance and assume the ground is level.)