4. In which of the following circuits will the bulb glow?

On a very muddy football field, a 110kg linebacker tackles an 85kg halfback. Immediately before the collision, the linebacker is

ololo11 [35]

Answer:

A. the magnitude of the velocity at which the two players move together immediately after the collision is 7.9m/s

B. The direction of this velocity is due north as the linebacker since he has obviously has more momentum

Explanation:

This problem bothers on the inelastic collision

Given data

Mass of linebacker m1= 110kg

Mass of halfbacker m2= 85kg

Velocity of linebacker v1= 8.8m/s

Velocity of halfbacker v2= 7.2m/s

Applying the principle of conservation of momentum for inelastic collision we have

m1v1 +m2v2= (m1+m2)v

Where v is the common velocity after impact

Substituting our data into the expression we have

110*8.5+85*7.2= (110+85)v

935+612=195v

1547=195v

v=1547/195

v=7.9m/s

Momentum of linebacker after impact = 110*7.9= 869Ns

Momentum of halfbacker after impact = 85*7.9= 671.5Ns

the direction after impact is due north since the linebacker has greater momentum

5 0

4 years ago

Which statement describes how Earth compares to the moon? Earth has more inertia than the moon. The moon has more gravitational

Juliette [100K]

Answer

Earth has more inertia than the moon.

6 0

3 years ago

Read 2 more answers

The rain shadow effect would be most evident in which direction relative to the rocky mountains?

timofeeve [1]

<span>The rain shadow effect would be most evident in the “Eastern” direction in relative to the Rocky Mountains.

A “Rain-Shadow” is a dry area that is formed on the side of the mountains which are away from the wind. The rain-producing weather systems are blocked by the mountains and a shadow of dryness is cast on that area, without much moisture left in the air.

The Continental Divide in America acts as a great barrier for precipitation.

The Rocky Mountains are a major mountain range that is present in the western North America and stretch for more than 3,000 miles across the northern part of British Columbia, western side of Canada, till New Mexico, in the South-Western part of the US.

The low pressure systems are known to approach from the south to skirt the Rocky Mountains. They generate high precipitation on the eastern side. However, there is little or no precipitation on the western slope.
</span>

6 0

3 years ago

When an Gravitational field it has energy in its what energy store

docker41 [41]

The masses of two bodies their distance apart and the gravitational contents G is in every day case i.e. close to the earth surface the gravitational field is considered to be constant.

5 0

3 years ago

The resistance and the magnitude of the current depend on the path that the current takes. The drawing shows three situations in

maria [59]

Answer: (a). Resistance = 0.4286ohms and Current (I) = 7A

(b). Resistance (R) = 0.027 ohms and Current (I) = 111.1A

(c). Resistance (R) = 0.1071 ohms and Current (I) = 28A

Explanation:

From the question, given that;

ρ = 1.5*10-2ῼ.m

Lo = 7cm = 0.07m

V = 3V

From the formula R = ρL/A, where A is the area of cross section, L is the length of material and ρ is the resistivity.

(A)

L = 4Lo and A = 2Lo*Lo

R = ρL/A

R = ρ4Lo/(2Lo*Lo)

R = 2ρ /Lo = 2*1.5*10-2/0.07

R = 0.4286 ῼ

From this the current becomes;

I = V/R = 3/ 0.4286 = 6.99 = 7A

(B)

L = Lo and A = 4Lo * 2Lo

R = ρL/A

R = ρLo/ (4Lo*2Lo) after eliminating Lo from both sides we get,

R = ρ/8Lo = 1.5*10-2 / 8*0.07

R = 0.027

Current (I) = V/R = 3/0.027 = 111.1A

(C)

L = 2Lo and A = Lo * 4Lo

R = ρL/A

R = ρ2Lo/ (Lo*4Lo) eliminating Lo from both sides we get,

R = ρ/2Lo = 1.5*10-2 / 2*0.07 = 0.1071

The current becomes;

I = V/R = 3/0.1071 = 28A

4 0

4 years ago

Read 2 more answers