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3 years ago

As Earth travels in its ____, different constellations are visible at different times of the year.

Physics

2 answers:

Nataly [62]3 years ago

8 0

Answer: orbit

Explanation:

Our sky is divided into 88 areas known as constellations. These constellations are identified by the brightest stars of these areas forming a recognizable pattern. As the Earth travels in its orbit around the Sun, different constellations are visible at different times of the year. This is because different part of the sky is visible as earth goes around the Sun.

Thus, As Earth travels in its orbit different constellations are visible at different times of the year.

Lesechka [4]3 years ago

4 0

The answer would be orbit.

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A loaf of bread is removed from an oven and is left sitting in the kitchen to cool. Its temperature t minutes after being remove

Darya [45]

<h2>Answer:</h2>

(a). 73° C.

(b). 176° C.

(c). 93.02°C.

<h2>Explanation:</h2>

In the question,

We have been given an equation,

$T(t) = 103e^{-0.0182t}+73.$

(a).

We need to find the temperature of the kitchen,

So,

Time, t → ∞

On putting the value of t as infinite in the equation we get,

$T(\infty)=103e^{-0.0182*\infty}+73\\T(\infty)=103*0+73\\T(\infty)=0+73\\T(\infty)=73\\$

Therefore, the temperature of the Kitchen is 73° C.

(b).

The initial temperature of the bread when it is removed from the oven is at, t = 0 s

So,

On putting the value of t = 0, we get,

$T(t) = 103e^{-0.0182t}+73.\\T(0)=103e^{-0.0182\times 0} + 73\\T(0)=103+73\\T(0)=176$

Therefore, the initial temperature of the bread is 176° C.

(c).

On putting the value of t = 90 minutes, we get,

$T(t) = 103e^{-0.0182t}+73.\\T(90)=103e^{-0.0182\times 90} + 73\\T(90)=20.0199+73\\T(90)=93.02$

Therefore, the temperature of the bread after 90 minutes is 93.02°C.

8 0

3 years ago

Using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuri

Nataly_w [17]

Don't they have to pay insurance company if something happens to there car.

5 0

2 years ago

All chordates are vertebrates? A. True B. False

makvit [3.9K]

This is true chordates are vertebrae

3 0

3 years ago

Read 2 more answers

The weights in atwoods machine, starting at rest, attain a velocity of 2ft/sec in one sec. Find the ratio of the masses

Orlov [11]

Refer to the figure shown below.
Let m₁ and m₂ e the two masses.
Let a = the acceleration.
Let T = tension over the frictionless pulley.

Write the equations of motion.
m₂g - T = m₂a (1)
T - m₁g = m₁a (2)

Add equations (1) and (2).
m₂g - T + T - m₁g = (m₁ + m₂)a
(m₂ - m₁)g = (m₁ + m₂)a

Divide through by m₁.
(m₂/m₁ - 1)g = (1 + m₂/m₁)a

Define r = m₂/m₁ as the ratio of the two masses. Then
(r - 1)g = (1 +r)a
r(g-a) = a + g
r = (g - a)/(g + a)

With = 2 ft/s from rest, the acceleration is
a = 2/32.2 = 0.062 ft/s²
Therefore
r = (32.2 - 0.062)/(32.2 + 0.062) = 0.9962

Answer:
The ratio of masses is 0.9962 (heavier mass divided by the lighter mass).

8 0

3 years ago

A 9V battery produces a 1.5A current in a piece of wire. What is the resistance of the wire?

MAVERICK [17]

Explanation:

Using Ohm's Law and a bit of substitution, we can use voltage divided by current to solve for resistance. Doing that, we'll get 6 Ohm.

4 0

2 years ago