One strategy in a snowball fight is to throw

g A 150-kg object and a 450-kg object are separated by 4.90 m. (a) Find the magnitude of the net gravitational force exerted by

klemol [59]

Answer:

BBbbb

Explanation:

B is the correct answer:))))

4 0

3 years ago

When dealing with the conservation of momentum, does direction matter?

allochka39001 [22]

Answer:

Momentum is conserved in all three physical directions at the same time.

Explanation:

There is a peculiarity, however, in that momentum is a vector, involving both the direction and the magnitude of motion, so that the momenta of objects going in opposite directions can cancel to yield an overall sum of zero.

5 0

3 years ago

Three capacitors, C1 = 2 μF, C2 = 4 μF, C3 = 4 μF, are connected in series Determine the capacitance of a single capacitor that

julsineya [31]

Answer:

1 μF

Explanation:

To obtain the answer to the question, all we need to do is to calculate the equivalent capacitance of the capacitors. This can be obtained as illustrated below.

From the question given above, the following data were obtained:

Capacitor 1 (C₁) = 2 μF

Capacitor 2 (C₂) = 4 μF

Capacitor 3 (C₃) = 4 μF

Equivalent capacitance (Cₑq) =?

Cₑq = 1/C₁ + 1/C₂ + 1/C₃

Cₑq = 1/2 + 1/4 + 1/4

Cₑq = (2 + 1 + 1)/4

Cₑq = 4/4

Cₑq = 1 μF

Thus, the answer to the question is 1 μF

4 0

3 years ago

You are unloading a refrigerator from a delivery van. The ramp on the van is 5.0 mm long, and its top end is 1.4 mm above the gr

Ivahew [28]

Answer:

Work done is 1.31 J.

Explanation:

Given:

Length of the ramp (L) = 5.0 mm

Height of the top end (H) = 1.4 mm

Horizontal force applied (F) = 270 N

Work done (W) = ?

We know that,

Work done is equal to the product of force and displacement caused along the line of application of force.

Here, the force acting on the refrigerator is in the horizontal direction while the refrigerator is moving down along the length of the ramp. So, we have to first find the horizontal component of the displacement caused.

Now, consider the triangle ABC representing the given situation. The point A is the top end point of the ramp, AB is the length of the ramp, AC is the vertical displacement of the refrigerator and BC is the horizontal displacement of the refrigerator.

Using Pythagoras theorem,

$AB^2=BC^2+AC^2\\\\(5.0)^2=BC^2+(1.4)^2\\\\BC=\sqrt{25.0-1.96}\\\\BC=4.86\ mm$

Now, force applied on the refrigerator is in the direction opposite to the horizontal component of displacement. So, work is negative.

Work = Force × Horizontal displacement

$W=270\ N\times 4.86\ mm\\\\W=1312.2\ \textrm{N-mm}\\\\W=1.31\ J\ \ \ \ \ \textrm{ [1 mm = 0.001 m]}$

Therefore, work done is 1.31 J.

7 0

3 years ago

Compute the order of magnitude of the mass of a bathtub half full of pennies. (Assume the pennies are made entirely of copper.)

devlian [24]

Answer:

Mass = 873.6kg = 0.874 × 10^3 kg

Order = 3

Question:

Compute the order of magnitude of the mass of a bathtub half full of pennies.(Assume the pennies are made entirely of copper and the tub measures 1.3 m by 0.5 m by 0.3 m)

Explanation:

Given:

Dimensions of the tub = 1.3 m by 0.5 m by 0.3 m

Density of copper d = 8960kg/m^3

Mass = volume × density

Volume of tub = L×B×H = 1.3 × 0.5 × 0.3 = 0.195m^3

Since the tub is half full:

V = 0.195/2 = 0.0975m^3

Mass = 8960kg/m^3 × 0.0975m^3

Mass = 873.6kg = 0.874 × 10^3 kg

Order = 3

Note: Order of magnitude is of the form:

N = a × 10^b

Where;

b = order of magnitude

and

1/√10 </= a < √10

8 0

4 years ago