Ask question

Ask question

All categories

2 years ago

6

30 points - how do I do 2 b and c?

1 answer:

Delvig [45]2 years ago

7 0

1. its must be B and 2. must be C

You might be interested in

30 points - how do I do 2 b and c?

Delvig [45]

1. its must be B and 2. must be C

7 0

2 years ago

The formula shown below is used to calculate the energy released when a specific quantity of fuel is burned. Calculate the energ

olya-2409 [2.1K]

Answer: 8400 J

Explanation:

The formula referenced in the question is:

$Q=m. c. \Delta T$

Where:

$Q$ is the thermal energy

$m=100g \frac{1 kg}{1000 g}=0.1 kg$ is the mass of the water sample

$c=4200 \frac{J}{kg\°C}$ is the specific heat capacity of water

$\Delta T=20\°C$ is the variation in temperature

Solving:

$Q=(0.1 kg)(4200 \frac{J}{kg\°C})(20\°C)$

$Q=8400 J$ This is the thermal energy released

8 0

2 years ago

According to Einstein's theory of relativity, what happens to the mass of an object as the object approaches the

Anuta_ua [19.1K]

Answer:

B

Explanation:

please mark me brainiest

8 0

3 years ago

Read 2 more answers

What part of your daily routine can be changed to help the climate change crisis?

Travka [436]

I recycle, would this help the climate?

6 0

2 years ago

An electromagnet is strong enough to lift 200 kg of mass. If you double the number of turns of wire around the core and triple t

VLD [36.1K]

Answer:1200 kg

Explanation:

Given

Electromagnet can lift a mass of $200\ kg$

Magnetic force necessary to hold mass is proportional to Magnetic field

and magnetic field (B) is proportional to NIA

where N=no of turns

I=current in the magnet

A=area of cross-section

When we double the no of turns and triple the current then

N becomes 2 N

I becomes 3 I

therefore magnetic field becomes 6 times

Thus magnetic force becomes 6 times and we can say that electromagnet can hold the 6 times of given weight

i.e. $6\times 200=1200\ kg$

4 0

2 years ago