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jolli1 [7]
3 years ago
6

What does every magnet possess?

Physics
1 answer:
snow_lady [41]3 years ago
8 0

All magnets possess a property called polarity--that is, a magnet's power of attraction is strongest at its opposite ends, usually called the north and south poles. The north and south poles attract each other, but north repels north and south repels south. All magnets attract iron.

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A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the cable for the following case
Murljashka [212]

Answer:

The answer is below

Explanation:

A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the

cable for the following cases:

a. The load moves downward at a constant velocity

b. The load accelerates downward at a rate 0.4 m/s??

C. The load accelerates upward at a rate 0.4 m/s??

Solution:

Acceleration due to gravity (g) = 10 m/s²

a) Given that the mass of the crane (m) is 140 kg. If the load moves downward, the tension (T) is given by:

mg - T = ma

Since the load has a constant velocity, hence acceleration (a) = 0. Therefore:

mg - T = m(0)

mg - T = 0

T = mg

T = 140(10) = 1400 N

T = 1400 N

b)  If the load moves downward, the tension (T) is given by:

mg - T = ma

T = mg - ma = m(g - a)

T = 140(10 - 0.4) = 140(9.96) = 134.4

T = 134.4 N

c)  If the load moves upward, the tension (T) is given by:

T - mg = ma

T = ma + mg = m(a + g)

T = 140(0.4 + 10) = 140(10.4)

T = 145.6 N

2) To find the distance (s) if the load move from rest (u= 0) and accelerates for 20 seconds (t = 20). We use:

s = ut + (1/2)gt²

s = 0(20) + (1/2)(10)(20)²

s = 2000 m

7 0
3 years ago
Describe how the amount of heat released or absorbed related to specific heat capacity and amount of it? A) Amount of heat absor
Grace [21]
The correct answer is
<span>C) Amount of heat absorbed or released is doubled if quantity is doubled. If a different substance with half the specific heat capacity is used, the amount of heat absorbed or released is cut in half. 

In fact, the amount of heat released or absorbed is given by:
</span>Q=m C_s \Delta T
<span>where 
m is the mass of the substance
Cs is the specific heat capacity of the material
</span>\Delta T is the change in temperature
<span>
We can see that Q is directly proportional to both m (mass, or quantity of the substance) and Cs (specific heat capacity). So if the quantity (m) is doubled, the amount of heat (Q) is doubled as well. Similarly, if the specific heat capacity (Cs) is cut in half, the amount of heat (Q) is cut in half as well.</span>
3 0
3 years ago
Read 2 more answers
A baseball is thrown a distance of 17.2 m What is its speed if it takes 0.56 seconds to cover the distance?
lubasha [3.4K]

Answer:

v = (S2 - S1) / t = 17.2 m / .56 s = 30.7 m/s

This is about 100 ft/sec or 69 mph

7 0
2 years ago
Hello
german

Answer:

sure. what you want it to be

6 0
3 years ago
Read 2 more answers
. A whale swims due east for a distance of 6.9 km, turns around and goes due west for 1.8 km, and finally turns around again and
lara31 [8.8K]

Answer:

a) 12.4 km

b) 8.8 km

Explanation:

a) Distance is the total space covered by an object in its entire journey.

So, distance = 6.9+1.8+3.7 = 12.4 km

Distance travelled by the whale is 12.4 km

b) Displacement is the minimum distance between the final and initial point of the journey.

Let us take direction towards East as positive and direction towards west positive.

So, Displacement is given by

6.9-1.8+3.7 = 8.8 km

The displacement of the whale is 8.8 km

4 0
3 years ago
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