The heat energy gained by the water in one minute is ?

When an object falls, it trades gravitational potential energy for kinetic energy, accelerating toward the ground. calculate the

liq [111]

The speed of the energy decreases

5 0

4 years ago

what is the acceleration of a car that slows down from 60m/s to 40 m/s during a period of 10 seconds?

algol [13]

The acceleration of the car is stated as -2 m/s², while the deceleration of the car is termed as 2 m/s².

Answer:

Explanation:

Acceleration exerted by any object in order of decrease in the speed is termed as deceleration. In other words , negative acceleration or acceleration acting in opposite direction to stop the motion of any object is termed as deceleration. The magnitude of acceleration and deceleration is same only the direction is completely opposite to each other. So the negative sign will be obtained for acceleration value of any object whose velocity slows down from initial velocity.

Here , the initial velocity was 60 m/s and the final velocity is slowed down to 40 m/s in time 10 s.

So acceleration = (Final velocity - Initial velocty)/Time

Acceleration = (40-60)/10 = -20/10 = -2 m/s².

Thus, the acceleration of the car is stated as -2 m/s², while the deceleration of the car is termed as 2 m/s².

5 0

3 years ago

Equation InterpretationTwo Pizza Rolls are on the rotating carousel of a microwave oven. One is at the rim (edge) and the other

svetoff [14.1K]

Answer:

Explanation:

Both the pizza rolls are on two circular paths having different radii because one of them is on the rim and another is near the central axis. Their angular velocity are equal . That means they rotate by same angle in equal period of time. So in Δt they make equal angles at the centre. Hence their angular displacements are equal.

But length of arc made by them in equal interval of time that is Δt are different. Ir is so because their speed are different . Speed v and angular speed ω are related to each other as follows.

v = ω r .

So for objects in motion on circular paths having different radii , v are different even if their ω are same.

length of arc l = v Δt

So length of arc will be proportional to their v which will be proportional to r if their ω are same .

Hence length of arc will be proportional to radius of circular path, ie their distance from the centre .

5 0

3 years ago

When electrons are lost, a ______ ion is formed. When electrons are gained, a __________ ion is formed.

xenn [34]

Answer:

When electrons are lost, a positively charged ion is formed. When electrons are gained, a negatively charged ion is formed.

Explanation:

Atoms consist of three particles:

- Protons, positively charged, in the nucleus

- Neutrons, no charge, in the nucleus

- Electrons, negatively charged, orbiting around the nucleus

The proton and the electron have same magnitude of charge ( $e=1.6\cdot 10^{-19}C$ ), but the proton's charge is positive while the electron's charge is negative.

For a neutral atom, the number of protons is equal to the number of electrons, so the atom is electrically neutral. However, sometimes the atom can lose or gain electrons, becoming electrically charged: this is called ion. In particular:

- If the atom loses one (or more) electrons, it will remain with an excess of positive charge (because the number of protons is now greater than the number of electrons), so it will form a positively charged ion

- if the atom gains one (or more) electrons, it will remain with an excess of negative charge (because the number of protons is now smaller than the number of electrons), so it will form a negatively charged ion

6 0

3 years ago

Read 2 more answers

A very long straight current-carrying wire produces a magnetic field of 20 mT at a distance d from the wire. To measure a field

Dimas [21]

Answer:

A. 4d

Explanation:

Magnetic field strength is inversely proportional to distance. So in order to have a smaller magnetic field, we need to move further out from the wire. How far we go exactly can be determined from the formula: B=(μ₀I)/(2πr)

(That is derived from Ampere's Law, which states ∫B•dl=μ₀I)

With that you can set up a ratio between the magnetic fields in both cases. Because the current is the same for both instances, everything reduces out on one side of the equation and leaves you with something that relates the two distances by a ratio of each magnetic field value.

My work is in the attachment, comment for questions.

7 0

3 years ago