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Iteru [2.4K]
3 years ago
12

The box is pulled horizontally across the floor by a force of 100 N and opposed by a frictional force of 60 N. The object accele

rates at 4 m/s2 .
Physics
1 answer:
dalvyx [7]3 years ago
7 0

Answer:

10 kg

Explanation:

  • first find resultant force by subtracting the forces
  • mass is force ÷ acceleration
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aivan3 [116]

The reason for people to swim easier in salt water than fresh water is because of buoyancy

Explanation:

In fresh water there is lack of minerals and has fresh water alone. The density of fresh water is 1000 kg/m³.  Hence, in fresh water  cannot exert the suitable buoyancy for the swimmer to float easier than that of salt water.

But in Salt water due to enrichment of salts  and minerals it is found that salt water has more density than fresh water. Here the salt water offers more buoyancy to the swimmer to lift him up in the water surface and to swim faster and easier than fresh water.

It is similar to that egg floats in the salt water and sinks inside the fresh water because of its own body weight.

4 0
3 years ago
Read 2 more answers
Bacteria prefer a dry environment to a damp or moist environment. False True
mariarad [96]

Answer:

false

Explanation:

cause bacteria prefers moist and damp environment

7 0
3 years ago
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Photograph E shows a rechargeable torch. When a student shakes the torch, the magnet moves through the coil and back again. This
Brums [2.3K]

Answer:

a) according to Faraday's law , b) creating a faster movement, placing more turns on coil

Explanation:

a) The voltage is induced in the coil by the relative movement between it and the magnet, therefore according to Faraday's law

           E = - d (B A) / dt

In this case, the magnet is involved, so the value of the magnetic field varies with time, since the number of lines that pass through the loop changes with movement.

This voltage creates a current that charges the battery

b) There are several ways to increase the voltage

* creating a faster movement, can be done by the user

* placing more turns on the coil, must be done by the manufacturer

6 0
3 years ago
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What is the correct answer?
LUCKY_DIMON [66]

Answer:

I think is d and you or very pretty

Explanation:

8 0
3 years ago
What dose nuclear reactions produce?
aleksandrvk [35]

Answer:

a new chromebook for you and you will get to know the other one that

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