3 years ago

When comparing the types of electromagnetic waves, which has the

Physics

2 answers:

marusya05 [52]3 years ago

8 0

I wanna say gamma rays .

padilas [110]3 years ago

7 0

Answer:

The right answer is gamma rays.

Explanation:

Please mark me brainliest

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Which of the following is a scalar quantity?

goldfiish [28.3K]

Answer:

C. 100 ft/min

Explanation:

A scalar quantity has no direction.

A scalar with direction is called a vector.

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4 years ago

A rope is tied to a box and used to pull the box 2.3 m along a horizontal floor. The rope makes an angle of 30∘ with the horizon

Savatey [412]

Answer:

Answered

Explanation:

A) The work done by gravity is zero because displacement and the gravitational force are perpendicular to each other.

W= FS cosθ

θ= 90 ⇒cos90 = 0 ⇒W= 0

B) work done by tension

W= Tcosθ×S= 5cos30×2.30= 10J

C) Work done by friction force

W= f×s=1×2.30= 2.30 J

D) Work done by normal force is Zero because the displacement and the normal force are perpendicular to each other.

E) The net work done= Work done by tension in the rope - frictional work

=10-2.30= 7.7 J

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3 years ago

A 0.50-kg box is attached to an ideal spring of force constant (spring constant) 20 N/m on a horizontal, frictionless floor. The

zhannawk [14.2K]

Answer:

$A = 0.24 m$

Explanation:

As we know that for spring block system the angular frequency is given as

$\omega = \sqrt{\frac{k}{m}}$

now we know that

$k = 20 N/m$

also we know that

$m = 0.50 kg$

so we have

$\omega = \sqrt{\frac{20}{0.5}}$

$\omega = 6.32 rad/s$

now we know that speed of an SHM at its equilibrium position is given as

$v = A\omega$

now plug in all values in it

$1.5 = A(6.32)$

$A = 0.24 m$

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4 years ago

The baking soda looked like it dissolved in the vinegar. Sarah and Connor watched as the balloon expanded and filled with a gas.

malfutka [58]

I think the answer is A- Chemical gas produced

6 0

3 years ago

Read 2 more answers

In order to keep a leaking ship from sinking, it is necessary to pump 12.0 lb of water each second from below deck up a height o

mr Goodwill [35]

Answer:

P = 0.14 hp

Explanation:

The power required by the ship is given as:

$P = \frac{Work}{Time} = \frac{Potential\ Eenrgy}{t}\\\\P = \frac{mgh}{t}$

where,

P = Power = ?

m = mass to pump = (12 lb)(1 kg/2.20 lb) = 5.44 kg

g = acceleration due to gravity = 9.81 m/s²

h = height = 2 m

t = time = 1 s

Therefore,

$P = \frac{(5.44\ kg)(9.81\ m/s^2)(2\ m)}{1\ s}\\\\P = 106.8\ W$

Converting to horsepower (hp):

$P = (106.8\ W)(\frac{1\ hp}{746\ W})$

3 0

3 years ago