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4 years ago

How can u use physics in the real world

1 answer:

3 0

Physics can be used in a variety of ways, a specific example would be rollercoaster. Physics can be used to determine the speed at which a rollercoaster can travel without going off the rails or when it needs to begin to slow down to make a sharp turn.

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Express 2000km to metres

satela [25.4K]

Explanation:

pure definition :

kilo means 1000 (thousand).

so, a km or kilometer is 1000 m or meter.

2000 km = 2000 × 1000 m = 2,000,000 meters

8 0

2 years ago

A scientist heats an unknown substance in a closed system. The graph shows the change in temperature over time.

jeka94

Answer:

Explanation:

It's A

8 0

3 years ago

Read 2 more answers

3. How do you represent the strength of a<br> force in a free-body diagram?

ivann1987 [24]

Generally, the length of the line will indicate how strong the force is. If you have two opposing forces and one is higher than the other, you would draw the line of the higher force visibly longer.

3 0

4 years ago

1kg slab of concrete loses 12,000j of heat when it cools from 30 Celsius to 26 Celsius. Determine the specific heat capacity of

OleMash [197]

The specific heat capacity of concrete is $3.0 J/(g^{\circ}C)$

Explanation:

When a certain amount of energy Q is supplied/given off to/from a sample of substance with mass m, the temperature of the substance increases/decreases by an amount $\Delta T$ , according to the equation

$Q=mC_s \Delta T$

where

m is the mass of the substance

$C_s$ is the specific heat capacity of the substance

$\Delta T$ is the change in temperature of the substance

In this problem, we have:

m = 1 kg = 1000 g is the mass of the concrete slab

$Q = -12,000 J$ is the amount of energy lost by the slab

$\Delta T = 30-26= -4^{\circ}C$ is the change in temperature of the slab

Solving the equation for $C_s$ , we find the specific heat capacity of concrete:

$C_s = \frac{Q}{m \Delta T}=\frac{-12,000}{(1000)(-4)}=3.0 J/(g^{\circ}C)$

Learn more about specific heat capacity:

brainly.com/question/3032746

brainly.com/question/4759369

#LearnwithBrainly

3 0

3 years ago

Please help quick! Discuss, in detail, three things that we can learn from fossils.

Free_Kalibri [48]

<span>1. We can learn what types of organisms lived at what times and where they lived.

2. We can learn about when certain groups of animals evolved and what their ancestors were like.

3. We can learn how the continents drifted by comparing where fossil species have been found (for example, a species that was found in Africa and South America but couldn't cross an ocean would tell us that Africa and South America used to be connected.

4. We can learn about organisms that no longer exist, including what they ate and looked like, how big they were, and other traits.</span>

8 0

4 years ago