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3 years ago

What are discretionary calories?

1 answer:

8 0

is the excess calories you can have once you get your required nutrient 
those excess calories can come from higher forms of fat such as milk cheese and meat and sugary items such as syrup butter and any sauce those calories can also come from pop candy and alcohol

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4. Someone took the last cookie in the cookie jar last night. The LAST

tangare [24]

Answer:

I think B is the answer

Explanation:

I think this cause a maid always cleans the house and might be awake at night

3 0

2 years ago

A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of ma

Brilliant_brown [7]

Answer with Explanation:

We are given that

$m_1=m_2=m$

$v_1=-29 im/s$

$v_2=-29 jm/s$

$m_3=3m$

a.Initial velocity of vessel,u=0

According to law of conservation of momentum

$Mu=m_1v_1+m_2v_2+m_3v_3$

Where M=Mass of vessel

$0=m(-29i)+m(-29j)+3mv_3$

$29im+29jm=3mv_3$

$v_3=29i+29j$ m/s

Magnitude, $\mid v_3\mid=\sqrt{(29)^2+(29)^2}=29\sqrt 2m/s$

b. $\theta=tan^{-1}(\frac{v_y}{v_x})=tan^{-1}(\frac{29}{29})=45^{\circ}$

Hence, direction of the velocity of third piece=45 degree

3 0

3 years ago

The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a so

IrinaK [193]

Answer:

Apparent frequency increases for Bob and decreases for Jill.

Explanation:

Doppler effect refers to the apparent change in frequency when there is relative motion between source and the listener. When the source and listener move closer, the apparent frequency heard by the listener increases. And when the source and listener move away from each other, the apparent frequency heard by the listener decreases.

Thus, when the emergency vehicle approaches Bob, the apparent frequency of the siren increases. It moves away from Jill, the apparent frequency heard by the Jill decreases.

8 0

3 years ago

Read 2 more answers

A toy rocket moving vertically upward passes by a 2.0-m-high window whose sill is 8.0 m above the ground. The rocket takes 0.15

sveta [45]

Answer:

$v_i = 18.86 m/s$

Explanation:

As we know that the speed of the rocket is v1 and v2 at the bottom and top of the window

then we will have

$d = (\frac{v_1 + v_2}{2}) t$

$2 = (\frac{v_1 + v_2}{2})(0.15)$

$26.67 m/s = v_1 + v_2$

also we know that

$v_2 - v_1 = (-9.81)(t)$

$v_2 - v_1 = (-9.81)(0.15) = -1.47$

now we have

$v_2 = 12.6$

also we have

$v_1 = 14.1 m/s$

now if the sill of the window is at height 8 m from the ground then we have

$v_1^2 - v_i^2 = 2 a h$

$(14.1^2) - v_i^2 = 2(-9.81)(8)$

$v_i = 18.86 m/s$

8 0

3 years ago

A box rests on top of a flat bed truck. the box has a mass of m = 18 kg. the coefficient of static friction between the box and

konstantin123 [22]

For this case, the first thing you should do is write the kinematic motion equation of the block.
We have then:
vf = vo + a * t
Where,
vf: Final speed.
vo: Initial speed.
a: acceleration.
t: time.
Substituting the values:
(16) = (0) + a * (16)
Clearing the acceleration:
a = 16/16 = 1m / s ^ 2
Note: the other data for this case are not used in this problem.
answer:
The acceleration of the box is 1m / s ^ 2

5 0

2 years ago