you lift a 30 N crate 2 meters onto a shelf. it takes you 5 seconds to accomplish this. how much gravitional potential energy does the crate gain

Answers

Answer 1

Answer: Gravitational potential energy is equal to force times height. That's 30 x 2 = 60 Joules. It makes no difference how fast or how slow you do the lift.

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What is the only force acting on an object orbiting Earth?A. air resistance
B. friction
C. inertia
D. gravity

Answers

The correct answer to the question is D). Gravity.

EXPLANATION:

Before coming into any conclusion, first we have to understand centripetal force.

Centripetal force is the force which is required to keep a body moving in a circular path. This force always acts along the radius and towards the centre.

As per the question, the object is moving around the earth. As it is moving in a orbit, it needs a centripetal force which will help the object stick to the orbit.

The centripetal force required is provided to the object by the gravitational force of earth .

Air resistance and friction play no role in imparting centripetal force to the object.

Hence, the correct option of this question is gravity, which is the only force that acts on an object orbiting earth.

im pretty sure its gravity

A soccer ball is kicked horizontally. What is its average speed if its displacement is 55.0 m after 12.00 s? What formula was used to solve this problem?

Answers

4.58 m/s

Speed = displacement / time

A charged object cannot attract a neutral object.
a. True
b. False

Answers

That's false. One of the first demonstrations of static attraction is
running a comb through your hair to charge it, and then using it
to pick up uncharged bits of tissue paper.

Ask a questioWhat are powers called that the framers of the Constitution felt existed and were expected to be held by the national government due to historical precedence and common practice?a. expressed
b. implied
c. intended
d. inherent n here.

Answers

The powers that the framers of the Constitution felt existed and were expected to be held by the national government due to historical precedence and common practice were called D) inherent.

Which of these features is NOT found on the ocean floor? A. mountain
B. volcano
C. river
D. plain

Answers

C. River

Hope I helped:P

There are two reasons why river isn't on the ocean floor, for one, the sea is saltwater, meanwhile rivers are usually fresh water heading to the ocean, and why would rivers be underwater if there's ALREADY water on the sea floor

Describe how do ions form?

Answers

Answer:

Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by a combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms.

Explanation:

Answer:

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms. Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.

Explanation:hope dis helps u

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