10/28/21

10/26/21

#### calculating final speed with constant acceleration

what equation can be used to solve this problem?a bicyclist at rest begins pedaling and gaining speed steadily for 5.7 seconds during which she covers 33m. what is her final speed?

10/25/21

#### What is the acceleration (in m/s^2) of gravity on the surface of the moon?

There are two parts to this problem:a). What is the acceleration (in m/s^2) of gravity on the surface of the moon? (I am not given mass or the radius)b). What is the acceleration (again in m/2^s)... more

10/25/21

#### The gravitational fields due to an object of mass m at distances r1 and r2 from the center of the object are 18.6 m/s2 and 7.00 m/s2 respectively.

If a third distance r3 = 6r1, what will be the gravitational field at this third location?

10/19/21

#### Newton’s 2nd Law Physics 11

a student of mass 68.0kg is climbing a rope in gym class. the distance to the ceiling is 10.0m. How long will it take the student to reach the ceiling if they are able to climb with a constant... more

10/15/21

#### An object is launched 200m at an angle of 25 degrees.

What is the max height?

10/15/21

10/15/21

#### Newtons Second Law- Grade 11 Physics

A car of mass 1640kg is travelling at a speed of 25.0m/s when the brakes are applied. The car comes to a stop in a distance of 68.5m. How much force did the brakes exert on the car?

10/14/21

#### A set of elements is subjected to a voltage v = 60 cos (5t + 45º) V and passed through by a current i = 3 cos (5t + 15º) A.

In sinusoidal steady state, the set of elements is represented by an impedance whose imaginary part is(A) 35Ω .(B) 25Ω .(C) 20Ω .(D) 15Ω .(E) 10Ω .

10/14/21

#### An alternating voltage is described by 𝑣 = 50 𝑐𝑜𝑠 𝑡 (𝑣𝑜𝑙𝑡𝑠).

The value of the stress at 𝑡=𝜋/4 (seconds) is:A) 25 √2 V.(B) 30 V.(C) 30 √2 V.(D) 30 √3 V.(E) 50 V.

10/14/21

#### In a three-phase, symmetrical, star-connected generator, phase sequence ABC, the phase voltage is 𝑉an=100∠40° 𝑉.

The phase voltage 𝑉cn is:(A) 100∠-80° 𝑉.(B) 100∠160° 𝑉.(C) 100∠120° 𝑉.(D) 100∠-120° 𝑉.(E) 100∠0° 𝑉.

10/12/21

#### convert to decimal

I need help converting 0.00011001 ^2 to decimal ?can anyone help with this please?

10/11/21

true or false .

10/11/21

10/10/21

#### Could I get some help with the problem, please?

A baseball is thrown upward with an initial velocity of 88 feet per second (𝑣0 = 88). When will the ball be 120 feet above the ground? [ℎ(𝑡) = −16𝑡 2 + 𝑣0𝑡].

10/10/21

A jet plane accelerates along a straight runway from rest to a speed of 140m/s in 50 s. Calculate:a) its change of velocity

10/09/21

#### Given F(x) = x^2 + 4x − 5, evaluate. F(−5)

Given F(x) = x^2 + 4x − 5, evaluate.F(−5)

10/09/21

#### Given q(r) = r^2 − 4, evaluate. q(−2)

Given q(r) = r^2 − 4, evaluate. q(−2)

10/05/21

#### Alex is asked to move two boxes of books in contact with each other and resting on a frictionless floor.

Alex is asked to move two boxes of books in contact with each other and resting on a frictionless floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force... more

10/04/21

#### The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/s , they then have the same kinetic energy.

The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/sm/s , they then have the same kinetic energy. What were the... more

05/11/21

#### Electronic Engineering (Maths)

The voltage equation for a motor is – V = E + Ia*Rawhere, Ia = Armature Current, Ra = Armature Resistance and E = Induced  EMFA 240 V DC motor has an armature resistance of 2.5 Ω. If the full load... more

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