Which of the following is equal to 1W? A.1 J B.1 J/s C.1 J·s D.1 N·m

Someone who is good at physics please help me out! i’ll give out brainliest answers

alexgriva [62]

Answer:

450m

Explanation:

You would use the equation x-x0=0.5(v0+v)t as you have the time and velocities. x-x0(Change in position/displacement)=0.5(0+30)30. The distance will be 450m.

6 0

3 years ago

When analyzing the results of a scientific experiment, Kevin should base his conclusion on

elena-14-01-66 [18.8K]

The best answer would be b

5 0

2 years ago

Which statement about gravity is always True? A. The force of gravity between two objects is greater when the objects have less

garri49 [273]

The answer is c because the farther apart they are the greater there gravity is

4 0

4 years ago

Read 2 more answers

(a) Suppose a meter stick made of steel and one made of invar are the same length at 0°C. What is their difference in length at

dem82 [27]

Explanation:

Given that,

Initial temperature $T_{i}=0^{\circ}C$

Final temperature $T_{f}=48.0^{\circ}C$

Length = 34.0 m

We know that,

Coefficient of linear expansion of Invar is

$\alpha=0.9\times10^{-6}/^{\circ}C$

Coefficient of linear expansion of steel is

$\alpha=12\times10^{-6}/^{\circ}C$

We need to calculate the temperature difference is

$\Delta T=T_{f}-T_{i}$

$\Delta T=48.0-0$

$\Delta T=48.0^{\circ}C$

We need to calculate the change in length of Invar

Using formula of change in length

$\Delta l=l\times\alpha\times\Delta t$

Put the value into the formula

$\Delta l=34\times0.9\times10^{-6}\times48.0$

$\Delta l=0.0014688=1.47\times10^{-3}\ m$

$\Delta l= 1.47\ mm$

We need to calculate the change in length of steel

$\Delta l'=34\times12\times10^{-6}\times48.0$

$\Delta l'=0.019584=19.59\times10^{-3}\ m$

$\Delta l'=19.59\ mm$

Difference in length of two 34.0 m

Long surveyor's tapes is

$\Delta L=\Delta l'-\Delta l$

Put the value into the formula

$\Delta L=19.59-1.47=18.12\ mm$

The difference in length is 18.12 mm.

Hence, This is the required solution.

6 0

3 years ago

Ivan pushes a dresser with full drawers across his carpeted floor. What could Ivan do to reduce the amount of friction between t

kow [346]

Well he could remove the drawers to make it lighter, which causes less friction

5 0

3 years ago

Read 2 more answers

Which of the following is equal to 1W?A.1 JB.1 J/sC.1 J·sD.1 N·m