3 years ago

The "big bang" refers to the origin of:

Physics

1 answer:

polet [3.4K]3 years ago

7 0

The answer is E. Our Universe

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An object is pulled northward at 20 N and southward at 15 N. What is the direction and force of the object?

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Answer:

It moves northward at 5N

Explanation:

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3 years ago

If a lever is 10m long and the effort is applied 4m from the fulcrum, what is the MA of the lever?

Marizza181 [45]

We Know: MA = d₁ / d₂
Here, d₁ = 4
d₂ = 10-4 = 6

Substitute their values into the expression:
MA = 4/6
MA = 2/3

So, Your Answer would be 2/3

Hope this helps!

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3 years ago

Transfer of heat through conduction can occur in which of the following?

lianna [129]

Answer:d I think

Explanation:

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Use Percentages Given that the molecular mass of magnesium

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Answer:

27%

Explanation:

15.999 divided by 58.32 = .27433128

Move the decimal place over 2 places.

27%

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4 years ago

Based on the data collected, explain why a launch angle of 30 degrees (HIGH HORIZONTAL VELOCITY & SMALL TIME OF FLIGHT) will

Gennadij [26K]

Answer:

Explanation:

The horizontal distance traveled by the projectile is given by the formula

$R=\frac{u^{2}Sin2\theta }{g}$

The formula for the time of flight is given by

$T = \frac{2u Sin\theta }{g}$

Case I: when the launch angle is 30°

So, $R_{1}=\frac{u^{2}Sin60 }{g}$

$R_{1}=\frac{0.866u^{2}}{g}$

Horizontal velocity = u Cos 30 = 0.866 u

$T_{1} = \frac{2u Sin30 }{g}=\frac{u}{g}$

Case II: when the launch angle is 60°

$R_{2}=\frac{u^{2}Sin120}{g}$

$R_{2}=\frac{0.866u^{2}}{g}$

Horizontal velocity = u Cos 60 = 0.5 u

$T_{1} = \frac{2u Sin60 }{g}=\frac{1.73 u}{g}$

By observing the case I and case II, we conclude that

R1 = R2

Horizontal velocity 1 > Horizontal velocity 2

T1 < T2

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3 years ago