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3 years ago

2.2.4 Quiz: Conservation of Energy

Physics

1 answer:

dexar [7]3 years ago

7 0

Answer:

it is the judicious use of energy to prevent wastage

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A very humble bumble bee is flying horizontally due North at a constant speed of 3.11 m/s. At the current location of the bumble

Reil [10]

To solve this problem we will apply the concepts of the Magnetic Force. This expression will be expressed in both the vector and the scalar ways. Through this second we can directly use the presented values and replace them to obtain the value of the magnitude. Mathematically this can be described as,

$\vec{F_B} = q(\vec{V}\times \vec{B})$

$F_B = q|v||B| sin\theta$

Here,

q = Charge

v = Velocity

B = Magnetic field

$\theta = \text{Angle between } \vec{B} \text{ and } \vec{V}$

Our values are given as,

$\theta = 35.7\°$

$q = 22.5*10^{-9}C$

$B = 1.05*10^{-5}T$

$v = 3.11m/s$

Replacing,

$F_B = (22.5*10^{-9}C)(3.11 \times 1.05*10^{-5}) sin(35.1\°)$

$F_B = 4.224*10^{-13}N$

Therefore the size of the magnetic force acting on the bumble bee is $4.22*10^{-13}N$

3 0

3 years ago

What does buoyancy depend on

Marta_Voda [28]

... the density of the liquid
... the volume of the submerged object

8 0

4 years ago

Read 2 more answers

which of the four forces makes paint cling to a wall ?which force makes adhesive sticky?which force makes wax to stick a car ?

True [87]

Answer:

This question is incomplete

Explanation:

The question is incomplete because of the absence of options.

However, the force that makes a paint cling to a wall is adhesive force. Adhesive force is the force between two unlike substances like a liquid clinging to a solid surface.

The force between adhesives or glue is also the force that makes them sticky. This force is referred to as cohesive force. This is a force found in between similar molecules (unlike adhesive force found between dissimilar molecules).

The force that makes wax to stick to a car is electromagnetic force. This is a force between charged particles; whether they appear to be moving or not. These particles of opposite charges come together to form a neutral force. In this case, charged atoms of the car and the wax come together (which causes what we see as the wax sticking to the car).

8 0

3 years ago

As a roller coaster car crosses the top of a 50-m-diameter loop-the-loop, its apparent weight is the same as its true weight.

scZoUnD [109]

Answer:22.36 m/s

Explanation:

Given

the diameter of loop d=50 m

the radius of loop r=25 m

At the top position, we can write,

weight and Normal reaction combination will provide the centripetal force i.e.

$R+W=\frac{mv^2}{r}$

$R=W\quad \quad [\text{apparent weight =Actual weight}]$

$2W=2mg=\frac{mv^2}{r}$

$v=\sqrt{2gr}$

$v=\sqrt{2\times 10\times 25}$

$v=22.36\ m/s$

3 0

3 years ago

How energy is transferred in a appliance

Inessa05 [86]

The amount of energy transferred to an appliance is depends on its power and length of time it is switched on. The wires attached to the appliance conduct the electricity and send it to the main motor function.

6 0

3 years ago