What is a force that opposes tje movement of energy?

A question for the physicists out there:

Tomtit [17]

I don't think that's exactly what this website is here for. / / / The average current = 30 C / 120 sec = 250 mA. / / / 1 volt = 1 joule/coulomb ... 30 C x 1.5 x 10^6 J/C = 4.5 x 10^7 joules per stroke. / / / Apoligies for the formatting. Some websites recognize a CR-LF from a mobile device, and others don't.

7 0

4 years ago

Give me advantages and disadvantages of sustainable energy:

AVprozaik [17]

An advantage of sustainable energy is that it diversifies the energy supply and reduces importance on imported fuels.
A disadvantage is that all types of gaining access to sustainable energy requires a lot of space/ land. This may prevent important necessities such as housing to not have enough land. Hope this helps ;)

5 0

3 years ago

A +7.00-μC point charge is moving at a constant 8.50×106 m/s in the +y-direction, relative to a reference frame. At the instant

docker41 [41]

The points are:

(a) x = 0.500 m, y = 0, z = 0 (b) x = 0, y = 0, z = +0.500 m

Answer:

a) $B = -2.38\times10^{-5} \hat k$

b) $B = 2.38\times10^{-5} \hat i$

Explanation:

The magnetic field can be calculated as follows:

$B= \frac{\mu_o}{4\pi}\frac{q (\vec v\times \hat r)}{r^2}$

a) The velocity vector is in +y direction and the point is on x-axis

Because $\hat j \times \hat i = -\hat k$ ,

$B= \frac{\mu_o}{4\pi}\frac{q (\vec v\times \hat r)}{r^2}$

$B= 1\times 10^{-7}\times 7\times 10^{-6}\times \frac{8.50\times 10^6 \hat j\times \hat i}{0.500^2}\\B = -2.38\times10^{-5} \hat k$

b) The velocity vector is in +y direction and the point is on z-axis

Because $\hat j \times \hat k = \hat i$ ,

$B= \frac{\mu_o}{4\pi}\frac{q (\vec v\times \hat r)}{r^2}$

$B= 1\times 10^{-7}\times 7\times 10^{-6}\times \frac{8.50\times 10^6 \hat j\times \hat k}{0.500^2}\\B = 2.38\times10^{-5} \hat i$

3 0

3 years ago

The temperature changes from 35°f during the night to 75°f during the day. what is the temperature change on the celsius scale?

nikklg [1K]

35°F=1.666667℃
75°F=23.88889℃
The temperature change is 22.222223°C

6 0

3 years ago

A 4.7-kg solid sphere, made of metal whose density is 4000 kg/m3, hangs by a light cord. When the sphere is immersed in water, w

lara31 [8.8K]

Answer:

T = 34.54 N

Explanation:

First we find the buoyant force acting on the sphere, due to displaced water. For that purpose, we need to find the volume of water displaced by the sphere.

Volume of Water Displaced = V = (Mass of Sphere)/(Density of metal)

V = 4.7 kg/(4000 kg/m³)

V = 0.001175 m³

Now, the buoyant force is given as:

F = (Density of Water)(V)(g)

F = (1000 kg/m³)(0.001175 m³)(9.8 m/s²)

F = 11.52 N

Now, we find the weight of the sphere:

W = mg = (4.7 kg)(9.8 m/s²)

W = 46.06 N

Since, both the tension force (T) and buoyant force act in upward direction, while the weight of sphere act in downward direction. Therefore,

W = T + F

T = W - F

T = 46.06 N - 11.52 N

4 0

3 years ago