3 years ago

Which statements accurately describe density? Check all that apply.

1 answer:

6 0

I think the answer is, density is the ratio of mass to volume.

Density is the term used to describe the relation between mass of liquid to a volume. A denser liquid is lighter. It can be observed on liquids that float on tops of another like oil and water.

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If enough heat was REMOVED from B, it would change into ____________.

Sindrei [870]

It would change into a gas.

5 0

3 years ago

A steel bridge is 1000 m long at -20°C in winter. What is the change in length when the temperature rises to 40°C in summer? The

xenn [34]

Answer:

ΔL = 0.66 m

Explanation:

The change in length on an object due to rise in temperature is given by the following equation of linear thermal expansion:

ΔL = αLΔT

where,

ΔL = Change in Length of the bridge = ?

α = Coefficient of linear thermal expansion = 11 x 10⁻⁶ °C⁻¹

L = Original Length of the Bridge = 1000 m

ΔT = Change in Temperature = Final Temperature - Initial Temperature

ΔT = 40°C - (-20°C) = 60°C

Therefore,

ΔL = (11 x 10⁻⁶ °C⁻¹)(1000 m)(60°C)

ΔL = 0.66 m

6 0

4 years ago

As a baseball is being caught, its speed goes from 43 to 0 m/s in about 0.003 s. Its mass is 0.145 kg. (Take the direction the b

juin [17]

The question is incomplete, these are the missing parts of the question.

b) What is the baseball's acceleration in g's? (Indicate the direction with the sign of your answer.)

(b) What is the size of the force acting on it?

Answer:

a) -14333.3ms-2

b) -1462.58g

c) 2078N

Explanation:

The acceleration (deceleration) is easily found from from the information provided. Then the acceleration is obtained in terms of g as shown in the solution attached. The force is obtained from F=ma as shown in the image attached. Note the acceleration is negative because the ball was coming to rest. (The ball was caught).

6 0

3 years ago

D= m/v [stack friction] , where d = density, m = mass, and v = volume. If a rock has a density of 10 g/cm3 and a volume of 15 cm

Cloud [144]

150 g/cm3
Write your equation out with known variables.

8 0

3 years ago

Consider what will happen when a bar magnet is pushed toward the coil. when the coil "feels" the changing magnetic field caused

notka56 [123]

The question just basically explained what happens

4 0

4 years ago