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3 years ago

What are the steps to find the mass of 30 mL of water ...?

1 answer:

8 0

The steps in order to calculate the mass of a given volume of water is to use density. <span>Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. Density slightly varies with changes in temperature so that it is important to determine the temperature.</span>

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Which of the two resistors dissipates the larger amount of power?

Aloiza [94]

The circuit shown has a battery and two resistors, with R1>R2. Which of the two resistors dissipates the larger amount of power? Explain

Rank in order, from largest to smallest, the three currents I1 TO I3. And explain why?

The two batteries are identical and the four resistors all ahve exactly the same resistance.

a) Compare change in V(ab), V(cd), and V(ef). Are they all the same? In not, rank them in decreasing order. Explain you reasoning

b) Rank in order, from largest to smallest, the five currents I1 to I5, and ezplain why

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3 years ago

What is the acceleration of a boat if the resultant force on it is 4000 N and its mass is 1240 kg

Marrrta [24]

Answer:

The acceleration of a boat if the resultant force on it is 4000 N and its mass is 1240 kg is 3.2 m/s².

Explanation:

Given

Force F = 4000 N

Mass m = 1240 kg

To determine

Acceleration a = ?

Important Tip:

The acceleration of a boat can be found using the formula F = ma

Using the formula

$F = ma$

where

F is the force (N)

m is the mass (kg)

a is the acceleration (m/s²)

now substituting F = 4000, m = 1240 in the formula

$F = ma$

$4000\:=\:1240\:\times a$

Switch sides

$1240a=4000$

Divide both sides by 1240

$\frac{1240a}{1240}=\frac{4000}{1240}$

Simplify

$a=\frac{100}{31}$

$a=3.2$ m/s²

Therefore, the acceleration of a boat if the resultant force on it is 4000 N and its mass is 1240 kg is 3.2 m/s².

5 0

3 years ago

A pendulum of mass 5.0 ???????? hangs in equilibrium. A frustrated student walks up to it and kicks the bob with a horizontal fo

Rudiy27

Answer:

a. 37.75°

b. 6.21 m

Explanation:

a. The horizontal force acting on a pendulum bob is given as:

F = mgsinθ

where m = mass of bob

g = acceleration due to gravity

θ = angle string makes with the vertical or angle of displacement

Making θ subject of formula, we have:

θ = $sin^{-1}(\frac{F}{mg} )$

θ = $sin^{-1} (\frac{30}{5*9.8})$

θ = 37.75°

The maximum angle of displacement is 37.75°

b. Period of a pendulum is given as:

$T = 2\pi\sqrt{ \frac{L}{g} }$

where L = length of string

Therefore, making L subject of formula:

$L = \frac{gT^2}{4\pi^2}$

$L = \frac{9.8 * 5^2}{4\pi^2} \\\\\\L = 6.21 m$

The string holding the pendulum has to be 6.21 m long.

4 0

3 years ago

Human eye forms an ____________ image on _________after passing through the lens

Marizza181 [45]

Answer:

inverted images

retina

3 0

3 years ago

Read 2 more answers

A 23.0 kg bucket of water is suspended by a very light rope wrapped around a solid uniform cylinder 0.300 m in diameter with mas

nevsk [136]

Answer:

The tension in the rope is 49.66 N.

Explanation:

Given that,

Mass of bucket m= 23.0 kg

Diameter = 0.300 m

Mass of rope M= 13.0 kg

Height = 10.5 m

Suppose we need to find the tension in the rope while the bucket is falling.

We need to calculate the acceleration

Using balance equation

$mg-T=ma$ ..(I)

We need to calculate the tension in the rope

Using formula of tension

$Tr=I\alpha$

$Tr=\dfrac{Mr^2}{2}\times\dfrac{a}{r}$

$T=\dfrac{Ma}{2}$ ....(II)

Put the value of T in the equation (I)

$mg-\dfrac{Ma}{2}=ma$

$a=\dfrac{mg}{m+\dfrac{M}{2}}$

Put the value into the formula

$a=\dfrac{23.0\times9.8}{23.0+\dfrac{13.0}{2}}$

$a=7.64\ m/s^2$

Now, put the value of a in equation (II)

$T=\dfrac{13.0\times7.64}{2}$

$T=49.66\ N$

Hence, The tension in the rope is 49.66 N.

5 0

3 years ago