(Please Help! Match the sentence to the number down below! Please I'll give brainlist and points!)

What allows the bimetallic coil to turn on or off a heating or cooling system? The two metals contract the same amount. The ther

Vedmedyk [2.9K]

Answer:

The two metals expand differently.

Explanation:

The bimetallic strip has two metal strips positioned like a bridge, these strips connect the electrical circuit to the heating system. When these strips are linear or "down" they allow the electricity to move through the circuit to the heating system to turn the heat on. When the strips are "up" the disconnect the electricity flow, thus turning the heating system off, thus the room becomes cool/cold.

3 0

3 years ago

can someone help me answer this question? A student connected an ammeter as shown in this picture. Did the student connect the a

nalin [4]

Answer:

No - It is connected in parallel instead of series

Explanation:

4 0

2 years ago

explain why when someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure

Charra [1.4K]

Answer:

the smaller the area the bigger the pressure

8 0

3 years ago

Read 2 more answers

A 0.58 kg mass is moving horizontally with a speed of 6.0 m/s when it strikes a vertical wall. The mass rebounds with a speed of

Sunny_sXe [5.5K]

Answer:

$5.8\; {\rm kg\cdot m \cdot s^{-1}}$ .

Explanation:

If the mass of an object is $m$ and the velocity of that object is $v$ , the linear momentum of that object would be $m\, v$ .

Assume that the initial velocity of the mass is positive ( $6.0\; {\rm m\cdot s^{-1}}$ .) However, the direction of the velocity is reversed after the impact. Thus, the sign of the new velocity of the object would be negative- the opposite of that of the initial velocity. The new velocity would be $(-4.0\; {\rm m\cdot s^{-1}})$ .

Thus, the change in the velocity of the mass would be:

$\begin{aligned}& (\text{Change in Velocity}) \\ =\; & (\text{Final Velocity}) - (\text{Initial Velocity}) \\ =\; & (-4.0\; {\rm m\cdot s^{-1}}) - (6.0\; {\rm m\cdot s^{-1}}) \\ =\; & (-10\; {\rm m\cdot s^{-1})\end{aligned}$ .

The change in the linear momentum of the mass would be:

$\begin{aligned} & \text{change in momentum} \\ =\; & (\text{mass}) \times (\text{change in velocity}) \\ =\; & 0.58\; {\rm kg} \times (-10\; {\rm m\cdot s^{-1}}) \\ =\; & (-5.8\; {\rm kg \cdot m \cdot s^{-1}})\end{aligned}$ .

Thus, the magnitude of the change of the linear momentum would be $5.8\; {\rm kg \cdot m \cdot s^{-1}}$ .

7 0

2 years ago

A wheel rotates clockwise 10 times per second. what is its angular speed answer

bogdanovich [222]

The frequency of the wheel is the number of revolutions per second:
$f= \frac{N_{rev}}{t}= \frac{10}{1 s}=10 Hz$
And now we can calculate the angular speed, which is given by:
$\omega = 2 \pi f=2 \pi (10 Hz)=62.8 rad/s$ in the clockwise direction.

3 0

3 years ago