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3 years ago

Which two quantities can be expressed using the same units?

Physics

1 answer:

lara [203]3 years ago

4 0

I think it’s 3. Work and energy
I’m so sorry if I’m wrong

Hope you found this helpful !

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What would the answer be

wariber [46]

Answer:

Explanation:

The density has a formula of d = m / V.

The volumes are given as the same.

The density will be

d_lead = 113/ V

d_aluminum = 27/V

It does not matter for this question what the volume actually is. Just note that the value of the volume is the same for each ball.

A: incorrect. If the volumes are the same, the density is not the same because the masses are different.

B: incorrect. If the density of the two balls was less than water, the two balls would float. Never going to happen unless the balls are thin shells.

C: incorrect. The exact opposite is the answer.

D: Correct. This is the answer.

6 0

3 years ago

During which type of change can an atom of carbon become an atom of nitrogen?

Alika [10]

Answer:

C.) Nuclear

Explanation:

6 0

3 years ago

Read 2 more answers

The radius of curvature is smaller at the top than on the sides so that the downward centripetal acceleration at the top will be

kap26 [50]

Answer:

$v = 14.86 m/s$

Explanation:

As we know that the force equation at the top is given as

$\frac{mv^2}{R} = ma$

now we know that

$a_c = 1.5 g$

so we have

$\frac{v^2}{R} = 1.5 g$

$v = \sqrt{1.5 Rg}$

so we will have

$v = \sqrt{1.5(15)(9.81)}$

$v = 14.86 m/s$

3 0

3 years ago

A truck starts from rest with an acceleration of 0.3 m/ S^2 find its speed in km/h when it has moves through 150 m

Nadya [2.5K]

Answer:

9.5 m/s

Explanation:

Distance, S = 150m

Acceleration, a = 0.3 m/s^2

Initial velocity, u = 0 m/s

Final velocity, v

Use kinematics equation

v^2 - u^2 = 2aS

v^2 - 0 = 2*0.3*150 = 90

v = sqrt(90) = 9.49 m/s

3 0

3 years ago

Read 2 more answers

A particle undergoes two displacements. The first has a

Novay_Z [31]

First you need to draw the picture of the problem to better understand it. Like the one bellow.

In this task you have 2 sides of triangle and we can calculate angle between them. Angle between them is 120 - 35 = 85 degrees.

Once you have those 3 variables you can calculate third side of triangle using cosine law.
a - second displacement
b - first displacement
c- resultant displacement.

$a^{2} = b^{2}+ c^{2}-2*b*c*cos85$
now we just need to calculate this.
$a^{2} = 38439.458$
a = 196

now, we use cosine law again to find the angle between second and first displacement.
$\alpha = 45.36$ degrees

The angle marked with "?" in the graph is our direction angle. We will call it $\beta$

$\beta =90-30-45.36 = 14.64$

Second displacement has magnitude of 196 and a direction of -14.64 with positive x axis

3 0

3 years ago