2 years ago

Which sample of copper would demonstrate the GREATEST increase in temperature if 500 J of energy were added to the sample?

Physics

2 answers:

melamori03 [73]2 years ago

7 0

Answer:

A) 0.5 kg

Explanation:

got it on usa test prep

inn [45]2 years ago

3 0

Answer:

A) 0.5 kg

Explanation:

Q = mCΔT

where Q is energy,

m is mass,

C is specific heat capacity,

and ΔT is temperature change.

Solving for ΔT:

ΔT = Q / (mC)

ΔT is the largest when m is the smallest.

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A circular curve of radius 150 m is banked at an angle of 15 degrees. A 750-kg car negotiates the curve at 85.0 km/h without ski

Crazy boy [7]

Answer: a) 7.1 * 10^3 N; b) -880 N directed out of the curve.

Explanation: In order to solve this problem we have to use the Newton laws, then we have the following:

Pcos 15°-N=0

Psin15°-f= m*ac

from the first we obtain N, the normal force

N=750Kg*9.8* cos (15°)= 7.1 *10^3 N

Then to calculate the frictional force (f) we can use the second equation

f=P sin (15°) -m*ac where ac is the centripetal acceletarion which is equal to v^2/r

f= 750 *9.8 sin(15°)-750*(85*1000/3600)^2/150= -880 N

6 0

3 years ago

How far will an object move in 6 seconds if its average speed during that time is 45 m/s

babunello [35]

Answer:

270 Meters

Explanation:

45×6=270

3 0

3 years ago

Read 2 more answers

25% part (c) assume that d is the distance the cheetah is away from the gazelle when it reaches full speed. Derive an expression

levacccp [35]

maximum speed of cheetah is

$v_1 = v_{max}$

speed of gazelle is given as

$v_2 = v_{g}$

Now the relative speed of Cheetah with respect to Gazelle

$v_{12} = v_1 - v_2$

$v_{12} = v_{max} - v_g$

now the relative distance between Cheetah and Gazelle is given initially as "d"

now the time taken by Cheetah to catch the Gazelle is given as

$d = v_{12}* t$

so by rearranging the terms we can say

$t = \frac{d}{v_{12}}$

$t = \frac{d}{v_{max} - v_g}$

so above is the relation between all given variable

6 0

3 years ago

When a star is in the main-sequence stage of its life, it is fusing __________ into ________

gizmo_the_mogwai [7]

Hydrogen into helium

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3 years ago

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zmey [24]

Answer:

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2 years ago