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3 years ago

Throughout the United , nutritionist must be liscenced in order to practice. A.true b.false

Physics

2 answers:

leva [86]3 years ago

5 0

Answer:

True.

Explanation:

A nutritionist must be licenced in order to be certified to practice in the United States.

bearhunter [10]3 years ago

3 0

The answer to this question is true.

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What is the frequency of a wave if the speed of the wave is 7.9m/s and the wavelength is 3.1m?

Tpy6a [65]

Answer:

Explanation:

The frequency of the wave given it's velocity and wavelength can be found by using the formula

$f = \frac{c}{ \lambda} \\$

where

c is the velocity of the wave in m/s

$\lambda$ is the wavelength in m

From the question

c = 7.9 m/s

$\lambda$ = 3.1 m

We have

$f = \frac{7.9}{3.1} = 2.548387... \\$

We have the final answer as

Hope this helps you

6 0

2 years ago

A pilot is flying from DFW to NYC. The air traffic controller directs him to fly 69° Northeast at 243 m/s. What is the y compone

kolezko [41]

Answer:

$v_{y} = 227$ m/s

Explanation:

Assumptions: 0° is true North, and 90° is east (along the x-axis).

To solve this problem we must use the expression:

$v_{y} = v_{0}sin(\theta)$

Where $v_{y}$ is the velocity in the y-direction (East), $v_{0}$ is the total velocity in the direction which the aircraft is travelling, and $\theta$ is the direction the aircraft is travelling (angle from the y-axis).

Using the equation above, we obtain the y-component of velocity

$v_{y} = (243)sin(69) = 226.86...$ m/s which is rounded to 227 m/s (due to the number of significant figures in the question).

8 0

4 years ago

Which item(s) would be sufficient to make a circuit?

masya89 [10]

Explanation :

A circuit is the representation of the path of the flow of current. The circuit can be either closed or open.

When the switch is off the circuit is closed circuit and when the switch is not connected the circuit is open.

The items that are sufficient to make a circuit are as follows :

Voltage source like a battery.
Resistors or electrical equipment like heater, motor etc.

Other components can be ammeter, voltmeter, ac source, variable resistors etc.

7 0

3 years ago

Read 2 more answers

An object is placed 18 cm in front of spherical mirror.if the image is formed at 4cm to the right of the mirror, calculate it's

ivolga24 [154]

1) Focal length

We can find the focal length of the mirror by using the mirror equation:
$\frac{1}{f}= \frac{1}{d_o}+ \frac{1}{d_i}$ (1)
where
f is the focal length
$d_o$ is the distance of the object from the mirror
$d_i$ is the distance of the image from the mirror

In this case, $d_o = 18 cm$ , while $d_i=-4 cm$ (the distance of the image should be taken as negative, because the image is to the right (behind) of the mirror, so it is virtual). If we use these data inside (1), we find the focal length of the mirror:
$\frac{1}{f}= \frac{1}{18 cm}- \frac{1}{4 cm}=- \frac{7}{36 cm}$
from which we find
$f=- \frac{36}{7} cm=-5.1 cm$

2) The mirror is convex: in fact, for the sign convention, a concave mirror has positive focal length while a convex mirror has negative focal length. In this case, the focal length is negative, so the mirror is convex.

3) The image is virtual, because it is behind the mirror and in fact we have taken its distance from the mirror as negative.

4) The radius of curvature of a mirror is twice its focal length, so for the mirror in our problem the radius of curvature is:
$r=2f=2 \cdot 5.1 cm=10.2 cm$

3 0

4 years ago

38.You walk from your house to the store 1.0 km in 25 minutes, and then you spent 10 minutes in the store. In your way back home

borishaifa [10]

Answer:

0.24 km

Explanation:

Total time taken = 25 + 10 + 15 = 50 mins

Total distance covered = 1.0 km( initial distance ) + 0.76 km( final distance ) = 1.76 km

therefore the displacement of the individual = 1 - 0.76 = 0.24 km

displacement is the difference between final distance and initial distance covered by an individual and it is a vector quantity

7 0

3 years ago