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4 years ago

QUIK!!!!!!!!!!!!Which is an activity that will build muscle endurance?

Physics

2 answers:

katen-ka-za [31]4 years ago

7 0

There is many activities you can do like running, sit-ups, push-ups, and squats.

Nimfa-mama [501]4 years ago

6 0

Running,jump rope, jumping jacks, push ups, sit ups, pulls ups, muscular endurance is about how long the excersize is done while muscular strength is when you work as hard as possible for short periods of time

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A seagull flying horizontally over the ocean at a constant speed of 2.60 m/s carries a small fish in its mouth. It accidentally

Ivenika [448]

(a) +2.60 m/s

The motion of the fish dropped by the seagul is a projectile motion, which consists of two independent motions:

- a horizontal uniform motion, at constant speed

- a vertical motion, at constant acceleration (acceleration of gravity, $g=-9.8 m/s^2$ , downward)

In this part we are only interested in the horizontal motion. As we said the horizontal component of the fish's velocity does not change, therefore its value when the fish reaches the ocean is equal to its initial value, which is the speed at which the seagull was flying (because it was flying horizontally):

$v_x = +2.60 m/s$

(b) -17.2 m/s

The vertical component of the fish's velocity instead follows the equation:

$v_y = u_y +gt$

where

$u_y = 0$ is the initial vertical velocity, which is zero

$g=-9.8 m/s^2$ is the acceleration of gravity

t is the time

Since the fish reaches the ocean at t = 1.75 s, we can substitute this time into the formula to find the final vertical velocity:

$v_y = 0+(-9.8)(1.75)=-17.2 m/s$

where the negative sign indicates the direction (downward).

(c)

The horizontal component of the fish's velocity would increase

The vertical component of the fish's velocity would stay the same.

As we said from part (a) and (b):

- The horizontal component of the fish's velocity is constant during the motion and it is equal to the initial velocity of the seagull -> so if the seagull's initial speed increases, the horizontal velocity of the fish will increase too

- The vertical component of the fish's velocity does not depend on the original speed of the seagull, therefore it is not affected.

4 0

3 years ago

I need help quickly pls

sukhopar [10]

Answer:

Ok I'm not 100% on this one but, try 3 lifes sorry if u get it wrong D:

Explanation:

4 0

3 years ago

Provide at least three reasons why friction is needed.

Anarel [89]

Without friction, we would not be able to stop walking since we would just keep slipping like on ice.

Without friction, objects would just slip and fall with a simple blow of air

And finally without friction we wouldn't be able to use machinery like cars and etc since they would just fly off

6 0

3 years ago

Read 2 more answers

3.113 A heat pump is under consideration for heating a research station located on Antarctica ice shelf. The interior of the sta

Lyrx [107]

Answer:

a. β = 8.23 K

b. β = 28.815 K

Explanation:

Heat pump can be find using the equation

β = TH / TH - TC

TH = 15 ° C + 273.15 K = 288.15 K

TC = - 20 ° C + 273.15 K = 253.15 K

β = 288.15 K / 288.15 k - ( 253.15 K )

β = 8.23 K

TH = 15 ° C + 273.15 K = 288.15 K

TC = 5 ° C + 273.15 K = 278.15 K

β = 288.15 K / 288.15 k - ( 278.15 K )

β = 28.815 K

6 0

3 years ago

Q|C A lightbulb marked "75 W [at] 120 V " is screwed into a socket at one end of a long extension cord, in which each of the two

VashaNatasha [74]

The actual power that is delivered to this lightbulb would be less than 75 Watts due to resistance of the conducting wires. Consequently, the resistance of these conducting wires would cause a voltage drop and as such reducing the power.
The circuit diagram for the connection of this lightbulb is shown in the image attached below.
The actual power delivered to this lightbulb is equal to 73.8 Watts.

<h3>How to calculate the power delivered to the lightbulb?</h3>

Mathematically, the power delivered to this lightbulb can be calculated as follows by using this formula:

Power, P = IV

Where:

I represents the current.

V represents the voltage.

Basically, the actual power that is delivered to this lightbulb would be less than 75 Watts due to resistance of the conducting wires. Consequently, the resistance of these conducting wires would cause a voltage drop and as such reducing the power.

Also, the circuit diagram for the connection of this lightbulb is shown in the image attached below.

<h3>How to determine the actual power delivered to this lightbulb?</h3>

First of all, we would determine the resistance in this electrical circuit:

P = IV = V²/R

R = V²/P

R = 120²/75

Resistance, R = 192 Ohms.

For the total equivalence resistance, we have:

Total equivalence resistance = 0.8 + 0.8 + 192

Total equivalence resistance = 193.6 Ohms.

Next, we would determine the current in this electrical circuit by applying Ohm's law:

V = IR

I = V/R

I = 120/193.6

Current, I = 0.62 Ampere.

Now, we can calculate the actual power delivered to this lightbulb:

P = I²R

P = 0.62² × 192

Actual power, P = 73.8 Watts.

Read more on actual power here: brainly.com/question/13896943

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<u>Complete Question:</u>

A lightbulb marked "75 W [at] 120 V" is screwed into a socket at one end of a long extension cord, in which each of the two conductors has resistance 0.800 V. The other end of the extension cord is plugged into a 120-V outlet.

(a) Explain why the actual power delivered to the lightbulb cannot be 75 W in this situation.

(b) Draw a circuit diagram.

3 0

2 years ago